Bias start control module, filtering module, circuit, system, equipment and vehicle

Abstract

The invention discloses a bias starting control module, an RC filtering module, a bias current generating circuit, a voltage stabilizing circuit, a starting circuit, an on-chip power supply system, electronic equipment and a vehicle. The bias starting control module comprises a logic control unit and a first switching tube, and the logic control unit is connected with the power supply voltage end of the bias current generating circuit; the switching circuit is used for generating a switching signal according to power voltage of the bias current generating circuit and an external control signal; a grid electrode of the first switch tube is connected with the logic control unit, a drain electrode of the first switch tube is connected with a first end of a first resistor unit of the first RC filtering structure, a source electrode of the first switch tube is connected with a second end of the first resistor unit, and the first switch tube is used for being switched on when a switching signal correspondingly starts a quick start function; the first resistor unit is short-circuited. According to the module provided by the invention, the time constant of the first RC filtering structure is reduced, and the charging speed of the capacitor is accelerated, so that the quick start of the bias current generating circuit is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of integrated circuits, and in particular to a bias startup control module, an RC filter module, a bias current generating circuit, a voltage stabilizing circuit, a startup circuit, an on-chip power supply system, an electronic device and a vehicle. Background Art

[0002] In the related art, in an on-chip power supply system, a bias current generating circuit can filter the bias voltage through an RC filtering structure to suppress noise generated from the power supply voltage and other circuit interference sources, thereby achieving stable control of the bias voltage.

[0003] However, in order to achieve better filtering effects, existing RC filter structures often require larger resistors and capacitors to provide lower cutoff frequencies. Although this design effectively reduces noise interference, it also brings some problems. For example, since the time constant of the RC filter structure is proportional to the value of the resistor and capacitor, larger resistor and capacitor values ​​will greatly increase the time constant, which in turn significantly increases the charging time of the filter capacitor. This not only prolongs the bias voltage settling time, but also slows down the startup speed of the bias current generating circuit. This delay in startup speed not only affects the overall response time of the circuit, but may also have a negative impact on system performance related to power-on time. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a bias startup control module, which reduces the time constant of the first RC filter structure, speeds up the charging speed of the filter capacitor, and realizes the rapid startup of the bias current generating circuit, thereby improving the startup efficiency of the overall circuit.

[0005] The second objective of the present invention is to provide an RC filter module.

[0006] The third objective of the present invention is to provide an RC filter module.

[0007] A fourth objective of the present invention is to provide a bias current generating circuit.

[0008] A fifth objective of the present invention is to provide a voltage stabilizing circuit.

[0009] A sixth objective of the present invention is to provide a starting circuit.

[0010] A seventh objective of the present invention is to provide an on-chip power supply system.

[0011] An eighth objective of the present invention is to provide an electronic device.

[0012] A ninth objective of the present invention is to provide a vehicle.

[0013] In order to achieve the above-mentioned purpose, a bias startup control module of an embodiment of the first aspect of the present invention is used to control a first RC filter structure for filtering a bias voltage in a bias current generating circuit, and the bias startup control module includes: a logic control unit connected to a power supply voltage end of the bias current generating circuit, and used to generate a switching signal according to the power supply voltage of the bias current generating circuit and an external control signal; a first switch tube, wherein the gate of the first switch tube is connected to the logic control unit, the drain of the first switch tube is connected to the first end of a first resistor unit of the first RC filter structure, and the source of the first switch tube is connected to the second end of the first resistor unit, and the first switch tube is used to be turned on when the switch signal corresponds to turning on a quick startup function, so as to short-circuit the first resistor unit.

[0014] According to the bias startup control module of the embodiment of the present invention, by introducing a logic control unit and a first switch tube, dynamic control of the first RC filter structure in the bias current generating circuit is realized. Specifically, the logic control unit generates a switch signal according to the power supply voltage of the bias current generating circuit and an external control signal. When the startup process starts, the switch signal generated by the logic control unit turns on the first switch tube, thereby short-circuiting the first resistor unit in the first RC filter structure. In the circuit, since the time constant of the first RC filter structure is proportional to the product of resistance and capacitance. Therefore, after the first resistor unit is short-circuited, the time constant is significantly reduced. This change speeds up the charging speed of the first capacitor unit, so that the first capacitor unit is charged to the required voltage faster, thereby accelerating the process of establishing the power supply voltage. This directly shortens the startup time of the bias current generating circuit, so that the bias current can reach a stable state faster, thereby improving the startup efficiency of the overall circuit.

[0015] In some embodiments, the logic control unit includes: a power-on reset subunit, the input end of the power-on reset subunit is suitable for inputting the power supply voltage of the bias current generating circuit, and the power-on reset subunit is used to generate a power-on reset signal according to the power supply voltage; a latch subunit, the input end of the latch subunit is connected to the output end of the power-on reset subunit, and the latch subunit is used to generate the switching signal according to the power-on reset signal and the external control signal.

[0016] In some embodiments, the power-on reset subunit includes: a power supply voltage detector, the input end of the power supply voltage detector is suitable for inputting the power supply voltage, and is used to convert the power supply voltage into a digital signal; a first inverter, the input end of the first inverter is connected to the output end of the power supply voltage detector, and is used to reversely process the digital signal of the power supply voltage and output a first power supply voltage reverse signal; a delay filter, the input end of the delay filter is connected to the output end of the first inverter, and is used to generate the power-on reset signal according to the first power supply voltage reverse signal.

[0017] In some embodiments, the power supply voltage detector includes: a second switch tube, the drain of the second switch tube is connected to a positive voltage source, and the gate of the second switch tube is connected to a negative voltage source; a third switch tube, the drain of the third switch tube is connected to a source of the second switch tube, and the gate of the third switch tube is connected to the gate of the second switch tube and the negative voltage source; a fourth switch tube, the drain of the fourth switch tube is connected to the source of the third switch tube, and the gate of the fourth switch tube is connected to the power supply voltage terminal of the bias current generating circuit; a fifth switch tube, the drain of the fifth switch tube is connected to the source of the fourth switch tube, and the gate of the fifth switch tube is connected to the control terminal of the fourth switch tube. , connected to the power supply voltage end of the bias current generating circuit; a sixth switch tube, the drain of the sixth switch tube is connected to the source of the fifth switch tube, the gate of the sixth switch tube is connected to the control end of the fifth switch tube and the power supply voltage end of the bias current generating circuit, and a first node is provided between the drain of the sixth switch tube and the source of the fifth switch tube, and the first node is used to output a digital signal of the power supply voltage; a seventh switch tube, the drain of the seventh switch tube is connected to the source of the sixth switch tube, the gate of the seventh switch tube is connected to the gate of the sixth switch tube and the power supply voltage end of the bias current generating circuit, and the source of the seventh switch tube is connected to the negative voltage source.

[0018] In some embodiments, the power supply voltage detector includes: a voltage divider circuit unit, a first end of the voltage divider circuit unit is connected to a positive voltage source, and a second end of the voltage divider circuit unit is connected to a negative voltage source, so as to obtain a voltage divider signal; a comparator, a positive input end of the comparator is connected to an output end of the voltage divider circuit unit, and a reverse input end of the comparator inputs the power supply voltage of the bias current generating circuit, and the comparator is used to output a digital signal of the power supply voltage according to the voltage divider signal and the power supply voltage.

[0019] In some embodiments, the voltage divider circuit unit includes: a first resistor and a second resistor, the first end of the first resistor is connected to the positive voltage source, the second end of the first resistor is connected to the first end of the second resistor, there is a second node between the first end of the second resistor and the second end of the first resistor, the second node is connected to the positive input end of the comparator to output the voltage divider signal, and the second end of the second resistor is connected to the negative voltage source.

[0020] In some embodiments, the delay filter includes: a delay generator, which is connected to the output end of the first inverter and is used to generate a delay signal according to the first power supply voltage reverse signal; a Schmitt trigger, which is connected to the delay generator and is used to generate the power-on reset signal according to the delay signal.

[0021] In some embodiments, the delay generator includes: an eighth switch tube, the drain of the eighth switch tube is connected to a positive voltage source, and the gate of the eighth switch tube is connected to the output end of the first inverter; a ninth switch tube, the drain of the ninth switch tube is connected to the source of the eighth switch tube, the gate of the ninth switch tube is connected to the bias voltage end of the bias current generating circuit, and a third node is provided between the drain of the ninth switch tube and the source of the eighth switch tube, and the third node is connected to the Schmitt trigger to transmit the delay signal; a tenth switch tube, the drain of the tenth switch tube is connected to the source of the ninth switch tube, the source of the tenth switch tube is connected to a negative voltage source, and the gate of the tenth switch tube is connected to the bias voltage end of the bias current generating circuit; an eleventh switch tube, the gate of the eleventh switch tube is connected to the third node and the Schmitt trigger, and the source and drain of the eleventh switch tube are both connected to a negative voltage source; a first capacitor, the first end of the first capacitor is connected to the third node and the Schmitt trigger, and the second end of the first capacitor is connected to the negative voltage source.

[0022] In some embodiments, the Schmitt trigger includes: a twelfth switch tube, the drain of the twelfth switch tube is connected to the positive voltage source, the gate of the twelfth switch tube is connected to the third node, the gate of the eleventh switch tube and the first end of the first capacitor; a thirteenth switch tube, the drain of the thirteenth switch tube is connected to the source of the twelfth switch tube, the gate of the thirteenth switch tube is connected to the third node, the gate of the eleventh switch tube and the first end of the first capacitor, and there is a positive voltage source between the drain of the thirteenth switch tube and the source of the twelfth switch tube. a fourth node; a fourteenth switch tube, the drain of the fourteenth switch tube is connected to the source of the thirteenth switch tube, the source of the fourteenth switch tube is connected to a negative voltage source, the gate of the fourteenth switch tube is connected to the third node, the gate of the eleventh switch tube and the first end of the first capacitor; a fifteenth switch tube, the source of the fifteenth switch tube is connected to the source of the thirteenth switch tube and the drain of the fourteenth switch tube, the drain of the fifteenth switch tube is connected to a positive voltage source, and the gate of the fifteenth switch tube is connected to the fourth node to output the power-on reset signal.

[0023] In some embodiments, the delay filter includes: multiple D flip-flops, the multiple D flip-flops are connected in series, the multiple D flip-flops use the same clock signal, the input end of the first D flip-flop among the multiple D flip-flops connected in series is connected to the output end of the first inverter, and is used to delay the first power supply voltage reverse signal and output the power-on reset signal.

[0024] In some embodiments, the latch subunit includes: a latch, the input end of the latch is connected to the output end of the power-on reset subunit, and is used to generate a latch signal according to the power-on reset signal and the external control signal; a first NOR gate, the first input end of the first NOR gate is connected to the output end of the latch, and the second input end of the first NOR gate inputs the first external control signal; a second inverter, the input end of the second inverter is connected to the output end of the first NOR gate, and is used to invert the output signal of the first NOR gate circuit to obtain the switching signal.

[0025] In some embodiments, the latch includes: a second NOR gate, a first input terminal of the second NOR gate is connected to the output terminal of the power-on reset subunit, a second input terminal of the second NOR gate is suitable for inputting a second external control signal, and the output terminal of the second NOR gate is connected to the first input terminal of the first NOR gate to output the latch signal; a third NOR gate, a first input terminal of the third NOR gate is connected to the third external control signal, a second input terminal of the third NOR gate is connected to the output terminal of the second NOR gate, and the output terminal of the third NOR gate is connected to the third input terminal of the second NOR gate.

[0026] In some embodiments, the output end of the logic control unit is also suitable for connecting to a second RC filter structure to be turned on when the switch signal output by the logic control unit corresponds to turning on the quick start function, so as to short-circuit the second resistance unit in the second RC filter structure, wherein the second RC filter structure is used to filter the reference voltage of the voltage stabilizing circuit, and the voltage stabilizing circuit and the bias current generating circuit are located in the same on-chip power supply system.

[0027] In some embodiments, the third external control signal is consistent with a timing of a power switch signal of an on-chip power supply system where the bias current generating circuit is located.

[0028] In some embodiments, the first switch tube is further configured to be disconnected when the switch signal corresponds to turning off the quick start function, so as to restore the RC filtering function of the first RC filtering structure.

[0029] In order to achieve the above-mentioned purpose, the RC filtering module of the second aspect embodiment of the present invention includes: a first RC filtering structure, the first RC filtering structure includes a first resistor unit and a first capacitor unit, the first end of the first resistor unit is connected to the bias voltage end of the bias current generating circuit where it is located and the first end of the first switch tube of the bias startup control module described in the above embodiment, the second end of the first resistor unit is connected to the first end of the first capacitor unit and the second end of the first switch tube, and the second end of the first capacitor unit is connected to a negative voltage source for filtering the bias voltage of the bias current generating circuit.

[0030] According to the RC filter module of the embodiment of the present invention, by designing the first RC filter structure, it can be used to filter the bias voltage in the bias current generating circuit to ensure the stability of the bias voltage. During the startup process of the bias current generating circuit, when the logic control unit of the bias startup control module detects that the power supply voltage reaches a certain condition, a switch signal can be generated to turn on the first switch tube, and this turn-on action short-circuits the first resistance unit. Since the time constant of the RC filter structure is determined by the product of resistance and capacitance, after short-circuiting the first resistance unit, the time constant is greatly reduced. This change speeds up the charging speed of the filter capacitor, so that the capacitor is charged to the required voltage faster, thereby accelerating the establishment process of the power supply voltage. This directly shortens the startup time of the bias current generating circuit, so that the bias current can reach a stable state faster, thereby improving the startup efficiency of the overall circuit.

[0031] In some embodiments, the RC filter module further includes: a pre-charge control unit, which is connected to the logic control unit of the bias startup control module and the first end of the first capacitor unit for pre-charging the first capacitor unit.

[0032] In some embodiments, the first resistance unit includes: a sixteenth switch tube, the drain of the sixteenth switch tube is connected to the bias voltage end of the bias current generating circuit and the drain of the first switch tube, and the gate of the sixteenth switch tube is connected to the power supply voltage end of the bias current generating circuit; a third resistor, the first end of the third resistor is connected to the source of the sixteenth switch tube, and the second end of the third resistor is connected to the first end of the pre-charge control unit and the source of the first switch tube.

[0033] In some embodiments, the first capacitor unit includes: a second capacitor, a first end of the second capacitor is connected to the second end of the third resistor, the first end of the pre-charge control unit, and the source of the first switch tube, and the second end of the second capacitor is connected to a negative voltage source; a seventeenth switch tube, a gate of the seventeenth switch tube is connected to the second end of the second resistor, the first end of the second capacitor, the first end of the pre-charge control unit and the source of the first switch tube, and the source and drain of the seventeenth switch tube are both connected to the negative voltage source.

[0034] In some embodiments, the pre-charge control unit includes: a fourth NOR gate, a first input end of the fourth NOR gate is connected to the output end of the logic control unit of the bias startup control module, and a second input end of the fourth NOR gate is suitable for inputting a third external control signal, and the third external control signal is consistent with the timing of the power supply signal of the on-chip power supply system where the bias current generating circuit is located; an eighteenth switch tube, a gate of the eighteenth switch tube is connected to the output end of the fourth NOR gate, and a drain of the eighteenth switch tube is connected to a positive voltage source; a fourth resistor, a first end of the fourth resistor is connected to the source of the eighteenth switch tube, and a second end of the fourth resistor is connected to the second end of the third resistor, the first end of the second capacitor, the gate of the seventeenth switch tube and the source of the first switch tube.

[0035] In some embodiments, the fourth NOR gate is used to obtain an enable signal according to the switch signal output by the logic control unit and the third external control signal, and the enable signal corresponds to the delay signal generated by the delay filter in the logic control unit.

[0036] In some embodiments, the eighteenth switch tube is turned on under the delay signal to charge the first capacitor unit together with the path of the first switch tube.

[0037] In some embodiments, the pre-charge control unit also includes: a third inverter, the input end of the third inverter is connected to the output end of the fourth NOR gate; a nineteenth switch tube, the gate of the nineteenth switch tube is connected to the output end of the third inverter, the drain of the nineteenth switch tube is connected to the gate of the seventeenth switch tube, the first end of the second capacitor, the second end of the fourth resistor, and the second end of the third resistor, and the source of the nineteenth switch tube is connected to the second end of the first switch tube.

[0038] In some embodiments, when the eighteenth switch tube is turned on, the nineteenth switch tube is turned off to cut off the connection between the first end of the first capacitor unit and the second end of the first switch tube.

[0039] In some embodiments, when the nineteenth switch tube is turned on, the voltage across the first capacitor unit is equal to the voltage at the second end of the first switch tube.

[0040] In order to achieve the above-mentioned purpose, the RC filtering module of the embodiment of the third aspect of the present invention includes: a second RC filtering structure, the second RC filtering structure includes a second resistor unit and a second capacitor unit, the first end of the second resistor unit is suitable for being connected to a reference voltage source, the first end of the second capacitor unit is connected to the second end of the second resistor unit, the second end of the second capacitor unit is connected to a negative voltage source, and there is a fifth node between the first end of the second capacitor unit and the second end of the second resistor unit, and the fifth node is suitable for being connected to a voltage stabilizing circuit of an on-chip power supply system; a twentieth switch tube, the gate of the twentieth switch tube is connected to the output end of the logic control unit of the bias startup control module described in the above embodiment, the source of the twentieth switch tube is connected to the first end of the second resistor unit and the reference voltage source, and the drain of the twentieth switch tube is connected to the second end of the second resistor unit and the fifth node, and is used to be turned on when the switch signal output by the logic control unit corresponds to turning on the quick startup function, so as to short-circuit the second resistor unit.

[0041] According to the RC filter module of the embodiment of the present invention, dynamic control of the second RC filter structure is achieved by combining the twentieth switch tube and the logic control unit. Specifically, during the startup of the voltage stabilizing circuit, the switch signal output by the logic control unit turns on the twentieth switch tube to short-circuit the second resistance unit in the second RC filter structure. Since the time constant of the second RC filter structure is proportional to the product of the resistance and the capacitance, the time constant is significantly reduced after the resistance unit is short-circuited. This change speeds up the charging speed of the filter capacitor, allowing the filter capacitor to charge to the power supply voltage faster, thereby effectively shortening the startup time of the voltage stabilizing circuit and improving the response speed and startup efficiency of the overall circuit.

[0042] In some embodiments, the second resistance unit includes: a fifth resistor, a first end of the fifth resistor is connected to the reference voltage source and the source of the 20th switch tube; a 21st switch tube, a drain of the 21st switch tube is connected to the second end of the fifth resistor, a source of the 21st switch tube is connected to the drain of the 20th switch tube and the fifth node, and a gate of the 21st switch tube is connected to a third external control signal end, and the third external control signal is consistent with the timing of the power supply switch signal of the on-chip power supply system.

[0043] In some embodiments, the second capacitor unit includes: a third capacitor, a first end of the third capacitor is connected to the fifth node, and a second end of the third capacitor is connected to a negative voltage source; a twenty-second switch tube, a gate of the twenty-second switch tube is connected to the fifth node, and a source and a drain of the twenty-second switch tube are both connected to the negative voltage source.

[0044] In order to achieve the above-mentioned purpose, the bias current generating circuit of the fourth aspect embodiment of the present invention includes: the bias startup control module described in the above embodiment and the RC filtering module described in the above embodiment, the bias startup control module is connected to the RC filtering module; and a bias current generating module, the bias current generating module is respectively connected to the RC filtering module and the bias startup control module.

[0045] According to the bias current generating circuit of the embodiment of the present invention, a bias startup control module and an RC filter module are combined to achieve a faster and more stable startup process. The bias startup control module is connected to the first resistance unit in the RC filter module through a logic control unit and a first switch tube, and the resistance unit is short-circuited when the circuit is started, thereby greatly reducing the time constant of the first RC filter structure. In this way, the filter capacitor in the RC filter module can be charged to the required voltage more quickly, thereby accelerating the process of establishing the power supply voltage. This directly shortens the startup time of the bias current generating circuit, allowing the bias current to reach a stable state more quickly, thereby improving the startup efficiency of the overall circuit.

[0046] In some embodiments, the bias current generating module includes: a filtering unit, wherein the input end of the filtering unit is connected to a reference voltage source to filter the reference voltage; a bias current generating unit, wherein the input end of the bias current generating unit is connected to the output end of the filtering unit, and is used to generate a bias current according to the filtered reference voltage; a low-voltage cascode current mirror, wherein the first end of the low-voltage cascode current mirror is connected to the output end of the bias current generating unit, and is used to mirror the bias current; a bias voltage providing unit, wherein the first end of the bias voltage providing unit is connected to the second end of the low-voltage cascode current mirror and the drain of the first switch tube in the bias startup control module, the second end of the bias voltage providing unit is the bias voltage end of the bias current generating circuit, the bias voltage end is connected to the first end of the first resistor unit in the RC filtering module and the drain of the first switch tube, and the third end of the bias voltage providing unit is connected to a negative voltage source, and is used to provide a bias voltage.

[0047] In some embodiments, the filtering unit includes: a sixth resistor, a first end of the sixth resistor is connected to the reference voltage source; a third capacitor unit, a first end of the third capacitor unit is connected to the second end of the sixth resistor, a second end of the third capacitor unit is connected to a negative voltage source, and a sixth node is provided between the first end of the third capacitor unit and the second end of the sixth resistor to output a filtered reference voltage.

[0048] In some embodiments, the third capacitor unit includes: a fourth capacitor, a first end of the fourth capacitor is connected to the second end of the sixth resistor and the sixth node, and a second end of the fourth capacitor is connected to the negative voltage source; a twenty-third switch tube, a gate of the twenty-third switch tube is connected to the first end of the fourth capacitor and the sixth node, and a source and a drain of the twenty-third switch tube are both connected to the negative voltage source.

[0049] In some embodiments, the bias current generating unit includes: a twenty-fourth switch tube, the gate of the twenty-fourth switch tube is connected to the sixth node, the drain of the twenty-fourth switch tube is connected to the output end of the low-voltage common-source and common-gate current mirror, for providing current driving capability; a seventh resistor and an eighth resistor, the first end of the seventh resistor is connected to the source of the twenty-fourth switch tube, the second end of the seventh resistor is connected to the first end of the eighth resistor, and the second end of the eighth resistor is connected to a negative voltage source to generate a bias current.

[0050] In some embodiments, the power supply terminal of the low-voltage cascode current mirror is connected to the output terminal of a voltage stabilizing circuit of an on-chip power supply system where the bias current generating circuit is located, so that a regulated voltage signal output by the voltage stabilizing circuit is used as a power supply voltage.

[0051] In some embodiments, the power supply terminal of the low voltage cascode current mirror is connected to the output terminal of the voltage stabilization circuit through a filter circuit.

[0052] In some embodiments, the bias current generating circuit further includes: a fifth capacitor, a first end of the fifth capacitor is connected to the output end of the voltage stabilizing circuit and the filter circuit, and a second end of the fifth capacitor is connected to a negative voltage source.

[0053] In some embodiments, the bias voltage providing unit includes: a twenty-fifth switch tube, the drain of the twenty-fifth switch tube is connected to the second end of the low-voltage common-source and common-gate current mirror and the drain of the first switch tube in the bias startup control module, the gate of the twenty-fifth switch tube is connected to the drain of the twenty-fifth switch tube, the drain of the first switch tube, and the drain of the sixteenth switch tube in the first resistance unit, and the source of the twenty-fifth switch tube is connected to a negative voltage source.

[0054] In some embodiments, the bias current generating circuit further includes: at least one bias current output switch tube, the gate of each bias current output switch tube is connected to the output end of the RC filter module, the source of each bias current output switch tube is connected to a negative voltage source, and the drain of each bias circuit output switch tube is suitable for connecting to a corresponding bias current demand module.

[0055] In order to achieve the above-mentioned purpose, the voltage stabilizing circuit of the fifth aspect of the present invention comprises: a voltage stabilizing module and the RC filtering module described in the above embodiment, wherein the voltage stabilizing module is connected to the RC filtering module.

[0056] According to the voltage stabilizing circuit of the embodiment of the present invention, by combining the voltage stabilizing circuit and the RC filter module, the noise in the voltage stabilizing circuit is effectively suppressed while accelerating the startup process of the voltage stabilizing circuit. Specifically, during the startup process of the voltage stabilizing circuit, the switch signal output by the logic control unit turns on the twentieth switch tube to short-circuit the second resistance unit in the second RC filter structure. Since the time constant of the second RC filter structure is proportional to the product of the resistance and the capacitance, the time constant is significantly reduced after the resistance unit is short-circuited. This measure to reduce the time constant accelerates the charging process of the filter capacitor, allowing the voltage stabilizing circuit to establish the required output voltage more quickly, thereby effectively shortening the startup time of the voltage stabilizing circuit and improving the response speed and startup efficiency of the overall circuit.

[0057] In some embodiments, the voltage stabilization module includes: a first-stage operational amplifier structure, the power supply end of the first-stage operational amplifier structure is suitable for inputting a bias current to supply power, the input end of the first-stage operational amplifier structure is connected to the fifth node in the RC filtering module to input a filtered bandgap reference voltage, and is used to generate an operational amplifier signal based on the bandgap reference voltage; a second-stage operational amplifier structure, the input end of the second-stage operational amplifier structure is connected to the output end of the first-stage operational amplifier structure, and is used to generate a voltage stabilization signal based on the operational amplifier signal.

[0058] In some embodiments, the output end of the second-stage operational amplifier structure is connected to a bias current generating circuit that generates the bias current, so that the regulated voltage signal serves as a power supply voltage of the bias current generating circuit.

[0059] In some embodiments, the first-stage op amp structure includes: a power supply unit, a first end of the power supply unit is suitable for inputting a bias current, and is used to generate an op amp power supply current according to the bias current; an op amp unit, a power supply end of the op amp unit is connected to the power supply unit, and an input end of the op amp unit is connected to the RC filter module, and is used to generate an op amp signal according to the bandgap reference voltage.

[0060] In some embodiments, the power supply unit includes: a current mirror unit, the input end of the current mirror unit is suitable for inputting a bias current for mirroring the bias current; a current source subunit, the first end of the current source subunit is connected to the output end of the current mirror unit, and the second end of the current source subunit is connected to the power supply end of the operational amplifier unit.

[0061] In some embodiments, the current mirror unit includes: a twenty-sixth switch tube, the gate of the twenty-sixth switch tube is suitable for inputting the bias current, and the source of the twenty-sixth switch tube is connected to the negative voltage source; a twenty-seventh switch tube, the gate of the twenty-seventh switch tube is suitable for inputting the bias current, the source of the twenty-seventh switch tube is connected to the drain of the twenty-sixth switch tube, and the drain of the twenty-seventh switch tube is connected to the first end of the current source sub-unit.

[0062] In some embodiments, the current source subunit includes: a twenty-eighth switch tube and a twenty-ninth switch tube, the source of the twenty-eighth switch tube is connected to the drain of the twenty-seventh switch tube and the gate of the twenty-eighth switch tube, the gate of the twenty-eighth switch tube is connected to the gate of the twenty-ninth switch tube to provide bias for the twenty-ninth switch tube, and the source of the twenty-ninth switch tube is connected to the power supply end of the operational amplifier unit; a thirtieth switch tube and a thirty-first switch tube, the source of the thirtieth switch tube is connected to the drain of the twenty-eighth switch tube and the gate of the thirtieth switch tube, the drain of the thirtieth switch tube is connected to a positive voltage source, the gate of the thirtieth switch tube is connected to the gate of the thirty-first switch tube to provide bias for the thirty-first switch tube, the source of the thirty-first switch tube is connected to the drain of the twenty-ninth switch tube, and the drain of the thirty-first switch tube is connected to the positive voltage source.

[0063] In some embodiments, the operational amplifier unit includes: a thirty-second switch tube and a thirty-third switch tube, the gate of the thirty-second switch tube is connected to the fifth node of the RC filter module, the drain of the thirty-second switch tube is connected to the drain of the thirty-third switch tube, and there is a seventh node between the drain of the thirty-third switch tube and the drain of the thirty-second switch tube to serve as the power supply end of the operational amplifier unit, the power supply end is connected to the source of the twenty-ninth switch tube, and the thirty-second switch tube and the thirty-third switch tube are used to generate a differential signal; a thirty-fourth switch tube and a thirty-fifth switch tube, the drain of the thirty-fourth switch tube is connected to the gate of the thirty-fourth switch tube and the source of the thirty-second switch tube, the source of the thirty-fourth switch tube is connected to the negative voltage source, the drain of the thirty-fifth switch tube is connected to the source of the thirty-third switch tube and the gate of the thirty-fifth switch tube, and the source of the thirty-fifth switch tube is connected to the negative voltage source, and is used to convert the differential signal into an output current.

[0064] In some embodiments, the operational amplifier unit also includes: a ninth resistor and a tenth resistor, the first end of the ninth resistor is connected to the output end of the second-stage operational amplifier structure, the second end of the ninth resistor is connected to the first end of the tenth resistor, the second end of the tenth resistor is connected to a negative voltage source, and there is an eighth node between the second end of the ninth resistor and the first end of the tenth resistor, and the eighth node is connected to the gate of the thirty-third switch tube to form a negative feedback loop.

[0065] In some embodiments, the operational amplifier unit also includes: a thirty-sixth switch tube, the gate of the thirty-sixth switch tube is connected to the gate of the thirty-fourth switch tube and the drain of the thirty-fourth switch tube, the source of the thirty-sixth switch tube is connected to the negative voltage source, for improving the output impedance; a thirty-seventh switch tube, the gate of the thirty-seventh switch tube is connected to the gate of the thirty-fifth switch tube and the drain of the thirty-fifth switch tube, the source of the thirty-seventh switch tube is connected to the negative voltage source, the drain of the thirty-seventh switch tube is connected to the output end of the second-stage operational amplifier structure through a sixth capacitor, for improving the output impedance, and the sixth capacitor serves as a compensation capacitor.

[0066] In some embodiments, the operational amplifier unit also includes: a thirty-eighth switch tube and a thirty-ninth switch tube, the gate of the thirty-eighth switch tube is connected to the gate of the thirty-ninth switch tube, the source of the thirty-eighth switch tube is connected to the drain of the thirty-sixth switch tube, the gate of the thirty-eighth switch tube and the gate of the thirty-ninth switch tube also input a bias voltage, and the source of the thirty-ninth switch tube is connected to the drain of the thirty-seventh switch tube to increase the output gain to obtain the operational amplifier signal.

[0067] In some embodiments, the second-stage op amp structure includes: an output conversion unit, a first end of the output conversion unit is connected to the drain of the thirty-eighth switch tube and the drain of the thirty-ninth switch tube, and is used to convert the output signal of the thirty-eighth switch tube and the output signal of the thirty-ninth switch tube into an op amp signal output; an output unit, an input end of the output unit is connected to the output end of the output conversion unit, and the output end of the output unit is connected to a bias current generating circuit that generates the bias current to output the regulated voltage signal.

[0068] In some embodiments, the output conversion unit includes: a 40th switch tube and a 41st switch tube, the source of the 40th switch tube is connected to the drain of the 38th switch tube and the gate of the 40th switch tube, the gate of the 40th switch tube is connected to the gate of the 41st switch tube, the drain of the 40th switch tube is connected to a positive voltage source, the drain of the 41st switch tube is connected to the positive voltage source, and the source of the 41st switch tube is connected to the drain of the 39th switch tube and the input end of the output unit.

[0069] In some embodiments, the output unit includes: a forty-second switch tube, the gate of the forty-second switch tube is connected to the source of the forty-first switch tube and the drain of the thirty-ninth switch tube, the drain of the forty-second switch tube is connected to the positive voltage source, the source of the forty-second switch tube is connected to the first end of the ninth resistor, and there is a ninth node between the source of the forty-second switch tube and the first end of the ninth resistor to output the regulated voltage signal.

[0070] In some embodiments, the voltage stabilizing circuit also includes: a compensation module, a first end of the compensation module is connected to the positive voltage source, and a second end of the compensation module is connected to the gate of the forty-second switch tube, the source of the forty-first switch tube, and the drain of the thirty-ninth switch tube for zero point compensation.

[0071] In some embodiments, the compensation module includes: an eleventh resistor and a seventh capacitor, the first end of the eleventh resistor is connected to the positive voltage source, the second end of the eleventh resistor is connected to the first end of the seventh capacitor, and the second end of the seventh capacitor is connected to the gate of the forty-second switch tube, the source of the forty-first switch tube, and the drain of the thirty-ninth switch tube.

[0072] In order to achieve the above-mentioned purpose, the startup circuit of the sixth aspect embodiment of the present invention includes: a first power supply module, the first power supply module is used to provide a first bias current in response to a fourth external control signal flipped from a low potential to a high potential, and the fourth external control signal is logically opposite to the power supply switch signal of the on-chip power supply system where the startup circuit is located; a second power supply module, the input end of the second power supply module is connected to the bias voltage end of the bias current generating circuit described in the above embodiment and the output end of the voltage stabilizing circuit described in the above embodiment, and is used to control the first power supply module to shut down and provide a second bias current when the bias voltage at the bias voltage end reaches a voltage threshold and the voltage stabilizing signal output by the voltage stabilizing circuit reaches the voltage stabilizing threshold; a current mirror module, the current mirror module is respectively connected to the first power supply module and the second power supply module, and is used to mirror the first bias current or the second bias current to the output end of the voltage stabilizing circuit.

[0073] According to the startup circuit of the embodiment of the present invention, by setting the first power supply module, the second power supply module and the current mirror module, the efficient power supply switching and stable output of the startup circuit are realized. Specifically, when the fourth external control signal is flipped from a low potential to a high potential, the first power supply module responds to the change of the fourth external control signal and provides an initial first bias current to quickly start the bias current generating circuit and the voltage stabilizing circuit. In this process, the voltage at the bias voltage end gradually increases, and the output voltage of the voltage stabilizing circuit is gradually established. When the bias voltage reaches the set voltage threshold and the output signal of the voltage stabilizing circuit reaches the voltage stabilizing threshold, the second power supply module can take over the current supply, turn off the first power supply module, and provide a stable second bias current. In the whole process, the current mirror module mirrors the first bias current or the second bias current to the output end of the voltage stabilizing circuit to ensure that the voltage stabilizing circuit can work stably during the whole startup process. Through such a power supply switching mechanism, the startup circuit of the present invention not only realizes fast startup, but also ensures that the system can quickly enter a stable operating state after startup, thereby improving the response speed and stability of the power supply system.

[0074] In some embodiments, the first power supply module includes: a forty-third switch tube, the drain of the forty-third switch tube is connected to the positive voltage source, and the source of the forty-third switch tube is connected to the current mirror module; a series inverse ratio tube structure, the first end of the series inverse ratio tube structure is connected to the gate of the forty-third switch tube, the second end of the series inverse ratio tube structure is connected to the negative voltage source, and the control end of the series inverse ratio tube structure is suitable for inputting a fourth external control signal; when the fourth external control signal is flipped from a low potential to a high potential, the series inverse ratio tube structure is turned on and the forty-third switch tube is turned on to provide the first bias current.

[0075] In some embodiments, the series inverse ratio tube structure includes: a forty-fourth switch tube, the drain of the forty-fourth switch tube is connected to the gate of the forty-third switch tube, and the gate of the forty-fourth switch tube is connected to a fourth external control signal terminal; a forty-fifth switch tube, the drain of the forty-fifth switch tube is connected to the source of the forty-fourth switch tube, and the gate of the forty-fifth switch tube is connected to the fourth external control signal terminal; a forty-sixth switch tube, the drain of the forty-sixth switch tube is connected to the source of the forty-fifth switch tube, the gate of the forty-sixth switch tube is connected to the fourth external control signal terminal, and the source of the forty-sixth switch tube is connected to a negative voltage source.

[0076] In some embodiments, the second power supply module includes: a forty-seventh switch tube, the gate of the forty-seventh switch tube is connected to the bias voltage end of the bias current generating circuit, the source of the forty-seventh switch tube is connected to the negative voltage source, and is used to be turned on when the bias voltage at the bias voltage end reaches a voltage threshold; a forty-eighth switch tube, the gate of the forty-eighth switch tube is connected to the output end of the voltage stabilizing circuit, the source of the forty-eighth switch tube is connected to the drain of the forty-seventh switch tube, and the drain of the forty-eighth switch tube is connected to the current mirror module, and is used to be turned on when the voltage stabilizing signal output by the voltage stabilizing circuit reaches the voltage stabilizing threshold.

[0077] In some embodiments, the current mirror module includes: a first current mirror unit, a first end of the first current mirror unit is connected to the source of the forty-third switch tube, a second end of the first current mirror unit is connected to a negative voltage source, and a third end of the first current mirror unit is connected to the input end of the voltage stabilizing circuit to mirror the first bias current to the voltage stabilizing circuit.

[0078] In some embodiments, the current mirror module also includes: a second current mirror unit, a first end of the second current mirror unit is connected to the drain of the forty-eighth switch tube, a second end of the second current mirror unit is connected to the gate of the forty-third switch tube and the first end of the series inverse ratio tube structure to control the forty-third switch tube to be cut off when the forty-eighth switch tube is turned on, and a third end of the second current mirror unit is connected to the first end of the first current mirror unit to mirror the second bias current to the voltage stabilizing circuit.

[0079] In some embodiments, the first current mirror unit includes: a forty-ninth switch tube, the drain of the forty-ninth switch tube is connected to the third end of the second current mirror, the gate of the forty-ninth switch tube, the gate of the thirty-eighth switch tube in the voltage stabilizing circuit, and the gate of the thirty-ninth switch tube in the voltage stabilizing circuit to provide a bias voltage, and the gate of the forty-ninth switch tube is connected to the drain of the forty-ninth switch tube and the gate of the twenty-seventh switch tube in the voltage stabilizing circuit to provide a bias current; a fiftieth switch tube, the drain of the fiftieth switch tube is connected to the source of the forty-ninth switch tube and the gate of the fiftieth switch tube, the gate of the fiftieth switch tube is connected to the drain of the fiftieth switch tube and the gate of the twenty-sixth switch tube in the voltage stabilizing circuit, and the source of the fiftieth switch tube is connected to a negative voltage source.

[0080] In some embodiments, the second current mirror unit includes: a fifty-first switch tube, the source of the fifty-first switch tube is connected to the gate of the fifty-first switch tube and the drain of the forty-seventh switch tube; a fifty-second switch tube, the gate of the fifty-second switch tube is connected to the gate of the fifty-first switch tube and the source of the fifty-first switch tube, and the source of the fifty-second switch tube is connected to the drain of the forty-ninth switch tube; a fifty-third switch tube, the source of the fifty-third switch tube is connected to the gate of the fifty-third switch tube and the drain of the fifty-first switch tube, and the drain of the fifty-third switch tube is connected to a positive voltage source; a fifty-fourth switch tube, the gate of the fifty-fourth switch tube is connected to the gate of the fifty-third switch tube and the source of the fifty-third switch tube, the source of the fifty-fourth switch tube is connected to the drain of the fifty-second switch tube, and the drain of the fifty-fourth switch tube is connected to the positive voltage source.

[0081] In some embodiments, the second current mirror unit also includes: a fifty-fifth switch tube, the gate of the fifty-fifth switch tube is connected to the gate of the fifty-third switch tube, the source of the fifty-third switch tube, and the drain of the fifty-first switch tube, the source of the fifty-fifth switch tube is connected to the gate of the forty-third switch tube and the drain of the forty-fourth switch tube, and is used to control the forty-third switch tube to be cut off when turned on to turn off the first bias current.

[0082] In some embodiments, the startup circuit also includes: two fifty-sixth switch tubes, the drain of each of the fifty-sixth switch tubes is connected to a positive voltage source, the gate of each of the fifty-sixth switch tubes is connected to a fourth external control signal terminal, and the sources of the two fifty-sixth switch tubes are respectively connected to the gate of the forty-third switch tube and the gate of the fifty-fifth switch tube, so as to pull up the gates of the forty-third switch tube and the fifty-fifth switch tube when the power switch signal of the on-chip power supply system where the startup circuit is located is a shutdown signal.

[0083] In some embodiments, the startup circuit also includes: four fifty-seven switching tubes, the source of each of the fifty-seven switching tubes is connected to a negative voltage source, the gate of each of the fifty-seven switching tubes is connected to a third external control signal terminal, and the drains of the four fifty-seven switching tubes are respectively connected to the bias voltage terminal of the bias current generating circuit, the gate of the twenty-fourth switching tube of the bias current generating circuit, the input terminal of the first-stage operational amplifier structure of the voltage stabilizing circuit, and the output terminal of the voltage stabilizing circuit, and are used to pull down the bias voltage terminal of the bias current generating circuit, the gate of the twenty-fourth switching tube of the bias current generating circuit, the input terminal of the first-stage operational amplifier structure of the voltage stabilizing circuit, and the output terminal of the voltage stabilizing circuit when the power switch signal of the on-chip power supply system where the startup circuit is located is a shutdown signal.

[0084] In order to achieve the above-mentioned purpose, the on-chip power supply system of the seventh aspect embodiment of the present invention includes: the bias current generating circuit described in the above embodiment, the voltage stabilizing circuit described in the above embodiment and the starting circuit described in the above embodiment, the voltage stabilizing circuit is connected to the starting circuit and the bias current generating circuit, and the starting circuit is connected to the bias current generating circuit.

[0085] According to the on-chip power supply system of the embodiment of the present invention, by integrating the bias current generating circuit, the voltage stabilizing circuit and the starting circuit, the efficient management of the on-chip power supply system from startup to stable output is realized. In the system startup phase, the startup circuit quickly provides the initial bias current through the first power supply module to ensure the rapid establishment of the bias current generating circuit and the voltage stabilizing circuit. As the system voltage gradually rises, the output of the voltage stabilizing circuit gradually tends to be stable. When the set voltage threshold and voltage stabilizing threshold are reached, the second power supply module of the startup circuit replaces the first power supply module to provide a stable second bias current to ensure that the voltage stabilizing circuit can continuously output a stable voltage. The bias current generating circuit effectively filters the bias voltage through the RC filtering module to further stabilize the output of the bias current. The current mirror module mirrors the startup current and the steady-state current to the output end of the voltage stabilizing circuit to maintain the high precision and low noise output of the power supply system. This multi-module coordinated working mechanism not only speeds up the startup speed of the on-chip power supply system, but also ensures that the system always maintains a stable voltage output during operation, improves the response speed of the system and the power supply ripple suppression ratio, thereby meeting the high requirements for power supply accuracy and stability.

[0086] In order to achieve the above-mentioned object, an electronic device according to an eighth aspect of an embodiment of the present invention includes the on-chip power supply system described in the above embodiment.

[0087] The electronic device according to the embodiment of the present invention ensures efficient startup and stable operation of the electronic device by adopting the on-chip power supply system described in the above embodiment. Specifically, the on-chip power supply system quickly establishes the power supply voltage and outputs stably through the coordinated work of the bias current generating circuit, the voltage stabilizing circuit and the startup circuit inside it, so that the electronic device can quickly enter the working state after startup. At the same time, the RC filter module in the on-chip power supply system effectively filters out the noise in the power supply process and reduces the time constant. Therefore, this design not only shortens the startup time of the electronic device, but also ensures the stability and reliability of the device in a complex working environment, thereby meeting the demand for high performance and high stability of the electronic device.

[0088] In order to achieve the above-mentioned object, a vehicle according to a ninth aspect of the present invention includes the electronic device described in the above embodiment.

[0089] According to the vehicle of the embodiment of the present invention, by adopting the electronic device described in the above embodiment, the on-chip power supply system in the electronic device includes a bias current generating circuit, a voltage stabilizing circuit and a startup circuit. The coordinated work of these circuits can quickly provide the required bias current and ensure that the power supply voltage is quickly established, thereby significantly accelerating the startup speed of the entire vehicle electrical system, improving the response time of the vehicle system, and improving the overall performance of the vehicle under various working conditions.

[0090] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0092] Figure 1 is a circuit diagram of an on-chip power supply system according to an embodiment of the present invention;

[0093] Figure 2 is a schematic diagram of a logic control unit according to an embodiment of the present invention;

[0094] Figure 3 is a circuit diagram of a power supply voltage detector according to an embodiment of the present invention;

[0095] Figure 4 is a circuit diagram of a power supply voltage detector according to yet another embodiment of the present invention;

[0096] Figure 5 is a circuit diagram of a delay filter according to an embodiment of the present invention;

[0097] Figure 6 is a circuit diagram of a delay filter according to yet another embodiment of the present invention;

[0098] Figure 7 is a timing diagram of a power switch signal of an on-chip power supply system according to an embodiment of the present invention;

[0099] Figure 8 is a circuit diagram of a pre-charge control unit according to an embodiment of the present invention;

[0100] Fig. 9 is a timing diagram of an enable signal according to an embodiment of the present invention;

[0101] Fig.10 is a circuit diagram of a pre-charge control unit when the third external control signal is at a high level according to an embodiment of the present invention;

[0102] Fig.11 is a circuit diagram of a pre-charge control unit according to another embodiment of the present invention;

[0103] Fig.12 is a circuit diagram of an RC filter module according to an embodiment of the present invention;

[0104] Fig.13 is a block diagram of an on-chip power supply system according to an embodiment of the present invention;

[0105] Fig.14 is a schematic diagram of an implementation of an on-chip power supply system according to an embodiment of the present invention;

[0106] Fig.15 is a block diagram of an electronic device according to an embodiment of the present invention;

[0107] Fig.16 is a block diagram of a vehicle according to one embodiment of the present invention.

[0108] Reference numerals:

[0109] Vehicle 100;

[0110] Electronic device 200;

[0111] On-chip power supply system 2000;

[0112] Bias current generating circuit 210; voltage stabilizing circuit 211; start-up circuit 212;

[0113] Bias start control module 1; RC filter module 2; bias current generating module 3; fifth capacitor 4; bias current output switch tube 5; voltage stabilizing module 6; compensation module 7; first power supply module 81; second power supply module 82; fifty-sixth switch tube 91; fifty-seventh switch tube 92; filter circuit 93;

[0114] Logic control unit 10; first switch tube 20; first RC filter structure 21; pre-charge control unit 22; second RC filter structure 23; twentieth switch tube 24; filter unit 31; bias current generating unit 32; low voltage common source common gate current mirror 33; bias voltage providing unit 34; eleventh resistor 71; seventh capacitor 72; forty-third switch tube 810; series inverse ratio tube structure 820; first current mirror unit 831; second current mirror unit 832;

[0115] The power-on reset subunit 11; the latch subunit 12; the first resistor unit 201; the first capacitor unit 202; the fourth NOR gate 221; the eighteenth switch tube 222; the fourth resistor 223; the third inverter 224; the nineteenth switch tube 225; the second resistor unit 231; the second capacitor unit 232; the sixth resistor 311; the third capacitor unit 312; the twenty-fourth switch tube 321; the seventh resistor 322; the eighth resistor 323; the twenty-fifth switch tube 341; the supply electrical unit 611; operational amplifier unit 612; output conversion unit 621; forty-fourth switch tube 821; forty-fifth switch tube 822; forty-sixth switch tube 823; forty-seventh switch tube 824; forty-eighth switch tube 825; forty-ninth switch tube 8311; fiftieth switch tube 8312; fifty-first switch tube 8321; fifty-second switch tube 8322; fifty-third switch tube 8323; fifty-fourth switch tube 8324; fifty-fifth switch tube 8325;

[0116] power supply voltage detector 110; first inverter 120; delay filter 130; latch 121; first NOR gate 122; second inverter 123; sixteenth switch tube 2011; third resistor 2012; second capacitor 2021; seventeenth switch tube 2022; fifth resistor 2311; twenty-first switch tube 2312; third capacitor 2321; twenty-second switch tube 2322; fourth capacitor 3121; twenty-third switch tube 3122; current mirror unit 6111; current source subunit 6112; twenty-sixth switch tube 6113; twenty-seventh switch tube 6114; The twenty-eighth switch tube 6115; the twenty-ninth switch tube 6116; the thirtieth switch tube 6117; the thirty-first switch tube 6118; the thirty-second switch tube 6121; the thirty-third switch tube 6122; the thirty-fourth switch tube 6123; the thirty-fifth switch tube 6124; the ninth resistor 6125; the tenth resistor 6126; the thirty-sixth switch tube 6127; the thirty-seventh switch tube 6128; the thirty-eighth switch tube 6129; the thirty-ninth switch tube 6120; the sixth capacitor 6130; the fortieth switch tube 6210; the forty-first switch tube 6211; the forty-second switch tube 6221;

[0117] The second switch tube 111; the third switch tube 112; the fourth switch tube 113; the fifth switch tube 114; the sixth switch tube 115; the seventh switch tube 116; the voltage divider circuit unit 117; the comparator 118; the delay generator 131; the Schmitt trigger 132; the D flip-flop 133; the second NOR gate 1211; the third NOR gate 1212;

[0118] a first resistor 1171 , a second resistor 1172 , an eighth switch tube 1311 , a ninth switch tube 1312 , a tenth switch tube 1313 , an eleventh switch tube 1314 , a first capacitor 1315 , a twelfth switch tube 1321 , a thirteenth switch tube 1322 , a fourteenth switch tube 1323 , and a fifteenth switch tube 1324 . DETAILED DESCRIPTION

[0119] Embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. Embodiments of the present invention are described in detail below.

[0120] In the related art, in the process of generating power supply voltage and bias current, the power supply ground, MOS tube, resistor and other components in the circuit will introduce various noises, including thermal noise, 1 / f noise, etc. These noises may affect the stability of the current source, thereby increasing the equivalent input noise of the bias module. In order to deal with this problem, large-area on-chip resistors and capacitors are usually used in current circuit designs to form low-pass RC filters to remove high-frequency noise. Although this method can effectively reduce noise, it will also introduce a larger RC time constant, that is, the response speed of the circuit will be slower. As the time constant becomes larger, the startup speed of the bias current source circuit slows down. This means that after the circuit is powered on, it takes longer to reach a stable state, which may affect the performance of some modules that rely on fast power-on. For example, some modules may need to start working immediately after power-on, but if the bias current source starts slowly, it may cause these modules to degrade in performance or unstable operation.

[0121] In response to the above problems, an embodiment of the present invention proposes a bias startup control module, which reduces the time constant of the first RC filter structure, speeds up the charging speed of the filter capacitor, and realizes rapid startup of the bias current generating circuit, thereby improving the startup efficiency of the overall circuit.

[0122] In some embodiments, the bias startup control module is an integrated circuit module for optimizing the generation process of bias current during the circuit startup process. The generation of bias current is very important for the stability of the circuit, especially in analog circuits, where accurate control of bias current can improve the performance and stability of the circuit. The module is used to control the first RC filter structure for filtering the bias voltage in the bias current generation circuit to ensure that the circuit can quickly and stably enter the working state.

[0123] Reference below Figure 1 A bias start control module according to an embodiment of the first aspect of the present invention is described.

[0124] Figure 1 is a circuit diagram of an on-chip power supply system according to an embodiment of the present invention. Figure 1As shown, the bias start control module 1 includes: a logic control unit 10 and a first switch tube 20 .

[0125] The logic control unit 10 is a control module integrated in the bias current generating circuit 210, and is used to generate corresponding control signals according to various input signals to control the working states of other modules or components in the circuit. In an embodiment, the logic control unit 10 is connected to the power supply voltage terminal of the bias current generating circuit 210, and is used to generate a switch signal according to the power supply voltage of the bias current generating circuit 210 and an external control signal, so as to control the on or off state of the first switch tube 20.

[0126] In some embodiments, the bias current generating circuit 210 can use a low voltage source as the power supply voltage, such as VDDL or VDDL1C, without directly using a high voltage source, such as VDDA. This design reduces the bias current of the bias current generating circuit 210's dependence on the high voltage source, enhances the power supply ripple suppression capability (PSR), and makes the circuit less sensitive to power supply noise.

[0127] In some embodiments, the external control signal is one of the key inputs used by the logic control unit 10 to determine the startup and control of the circuit. The external control signal can be generated by other parts of the system or external devices to indicate whether the current system is in the startup phase, or to indicate other specific operating conditions. For example, the signal can be a startup signal after the system is powered on or a switching signal for a certain operating mode. By combining with the power supply voltage signal, the logic control unit 10 uses the external control signal to generate an appropriate switch signal to control the operation of the first switch tube 20.

[0128] like Figure 1 As shown, the first switch tube 20 can be an n-type MOSFET (Metal-Oxide-SemiconductorField-Effect Transistor). The gate of the first switch tube 20 is connected to the logic control unit 10, the drain of the first switch tube 20 is connected to the first end of the first resistor unit 201 of the first RC filter structure 21, and the source of the first switch tube 20 is connected to the second end of the first resistor unit 201. The first switch tube 20 is used to turn on when the switch signal corresponds to turning on the fast start function to short-circuit the first resistor unit 201.

[0129] Specifically, when the switch signal generated by the logic control unit 10 is at a high level, the first switch tube 20 is in the on state, and the acceleration start function is also turned on when the bias current generating circuit 210 starts. The first switch tube 20 after being turned on short-circuits the first resistor unit 201 in the first RC filter structure 21. Since the time constant of the first RC filter structure 21 is determined by the product of the resistance value R and the capacitance value C, short-circuiting the first resistor unit 201 is actually equivalent to reducing the time constant, so that the filter capacitor can be charged to the required voltage faster, thereby significantly speeding up the startup speed of the bias current generating circuit 210. This design ensures that the circuit can provide a stable bias current in a short time, and is suitable for electronic devices that require fast response.

[0130] In some embodiments, in addition to n-type MOSFET, the first switch tube 20 can also be other types of electronic switches, such as an insulated gate bipolar transistor (IGBT) or an n-type JFET (junction field effect transistor), and the specific selection depends on the design requirements and performance requirements of the circuit.

[0131] According to the bias startup control module 1 of the embodiment of the present invention, by introducing the logic control unit 10 and the first switch tube 20, the dynamic control of the first RC filter structure 21 in the bias current generating circuit 210 is realized. Specifically, the logic control unit 10 generates a switch signal according to the power supply voltage and the external control signal of the bias current generating circuit 210. When the startup process starts, the switch signal generated by the logic control unit 10 turns on the first switch tube 20, thereby short-circuiting the first resistance unit 201 in the first RC filter structure 21. In the circuit, since the time constant of the first RC filter structure 21 is proportional to the product of resistance and capacitance. Therefore, after the first resistance unit 201 is short-circuited, the time constant is significantly reduced. This change speeds up the charging speed of the filter capacitor, so that the capacitor is charged to the required voltage faster, thereby accelerating the establishment process of the power supply voltage. This directly shortens the startup time of the bias current generating circuit 210, so that the bias current can reach a stable state faster, thereby improving the startup efficiency of the overall circuit.

[0132] Figure 2 is a schematic diagram of a logic control unit according to an embodiment of the present invention, such as Figure 2 As shown, the logic control unit 10 includes: a power-on reset subunit 11 and a latch subunit 12 .

[0133] Among them, the input end of the power-on reset subunit 11 is suitable for inputting the power supply voltage (VDDL) of the bias current generating circuit 210, and the power-on reset subunit 11 is used to generate a power-on reset signal according to the power supply voltage. Specifically, the power-on reset subunit 11 is responsible for detecting the power supply voltage of the bias current generating circuit 210, and when the power supply voltage reaches a certain threshold, the power-on reset subunit 11 generates a power-on reset signal. This signal is used to initialize or reset other modules in the system to ensure that all circuit modules that depend on the power supply voltage are in a reset state before the power supply voltage reaches a stable state. This can avoid the system from performing erroneous operations during voltage instability, thereby improving the reliability of the system. Therefore, the role of the power-on reset signal is to ensure that the system starts in a known, stable, and predictable state, thereby ensuring the normal operation of the system.

[0134] In some embodiments, the input end of the latch subunit 12 is connected to the output end of the power-on reset subunit 11, and the latch subunit 12 is used to generate a switch signal according to the power-on reset signal and the external control signal. Among them, the latch 121 is a circuit unit with a storage function, which can memorize and store the state of the signal. The role of the latch subunit 12 in the logic control unit 10 is to ensure that after the circuit is started, the switch signal can stably maintain its state until the next reset or external control signal changes, thereby controlling the state of the first switch tube 20 (on or off), affecting the startup process of the bias current generating circuit 210.

[0135] In some embodiments, the working process of the logic control unit 10 is as follows: when the bias current generating circuit 210 is started, the power supply voltage starts to gradually rise from zero. The power-on reset subunit 11 monitors the power supply voltage in real time through its input terminal, and generates a power-on reset signal after the voltage reaches a predetermined threshold level (i.e., the lowest voltage at which the circuit can operate safely and stably). This signal is sent to the latch subunit 12 to put it into a ready state to prepare for subsequent logic control and switch signal generation. After receiving the power-on reset signal, the latch subunit 12 can generate a switch signal in combination with an external control signal. This switch signal is used to control the conduction state of the first switch tube 20, thereby affecting the time constant of the first RC filter structure 21, and ultimately affecting the startup speed of the bias current generating circuit 210.

[0136] In some embodiments, the latch subunit 12 can be implemented using different types of circuit structures, such as a D-type latch 121 or an SR latch 121. The D-type latch 121 can ensure that the input signal is latched at each rising edge of the clock signal, while the SR latch 121 can latch or reset the output signal under more complex logic control.

[0137] like Figure 2As shown, the power-on reset subunit 11 includes: a power supply voltage detector 110 , a first inverter and a delay filter 130 .

[0138] In some embodiments, the power supply voltage detector 110 is a circuit module for monitoring the power supply voltage. The input end of the power supply voltage detector 110 is suitable for inputting the power supply voltage (VDDL) for converting the power supply voltage into a digital signal (VDDLB). Among them, digital signals are easy to process and analyze, especially in integrated circuits. Digital signals can be directly input into logic circuits for further processing, such as generating control signals or performing state judgment. In addition, digital signals are not easily interfered by noise and can provide more stable logic signals. In addition, digital signals can be compatible with various digital logic circuits, including microprocessors, controllers, and digital filters, making system design more flexible and scalable.

[0139] In some embodiments, the power supply voltage detector 110 of the embodiment of the present invention may include the following two circuit structures, as shown below: Figure 3 and Figure 4 The power supply voltage detector 110 is described in detail.

[0140] Figure 3 is a circuit diagram of a power supply voltage detector according to an embodiment of the present invention, Figure 3 As shown, the power supply voltage detector 110 includes: a second switch tube 111 , a third switch tube 112 , a fourth switch tube 113 , a fifth switch tube 114 , a sixth switch tube 115 and a seventh switch tube 116 .

[0141] The second switch tube 111 can be a p-type MOSFET, the drain of the second switch tube 111 is connected to the positive voltage source, and the gate of the second switch tube 111 is connected to the negative voltage source. This configuration enables it to be turned on or off under specific voltage conditions. It serves as the initial switch of the entire power supply voltage detector 110 to control the flow of current.

[0142] In some embodiments, the positive voltage source can be a working analog positive voltage inside the chip, such as VDDA, which is a positive voltage reference provided to the analog circuit part. The negative voltage source can be a working analog negative voltage inside the chip, which is a negative voltage reference or ground voltage provided to the analog circuit part. The drain of the second switch tube 111 is connected to the positive voltage source VDDA, which means that when the second switch tube 111 is turned on, it transmits the positive voltage source VDDA to the next level circuit. Its gate is connected to the negative voltage source VSSA, which is used to control the conduction state of the switch tube. This configuration can be used to achieve precise voltage detection and switch control functions.

[0143] In some embodiments, the third switch tube 112 may be a p-type MOSFET, the drain of the third switch tube 112 is connected to the source of the second switch tube 111, and the gate of the third switch tube 112 is connected to the gate of the second switch tube 111 and the negative voltage source. The cascade of the two switch tubes forms a series circuit for controlling the current flow of the subsequent circuit.

[0144] In some embodiments, the fourth switch tube 113 may be a p-type MOSFET, the drain of the fourth switch tube 113 is connected to the source of the third switch tube 112, and the gate of the fourth switch tube 113 is connected to the power supply voltage terminal (VDDL) of the bias current generating circuit 210. This means that the conduction state of the fourth switch tube 113 is controlled by the power supply voltage of the bias current generating circuit 210. When the power supply voltage reaches a certain threshold, the fourth switch tube 113 starts to conduct, so that current can flow through the switch tube.

[0145] In some embodiments, the fifth switch tube 114 may be a p-type MOSFET, the drain of the fifth switch tube 114 is connected to the source of the fourth switch tube 113, and the gate of the fifth switch tube 114 is connected to the control terminal of the fourth switch tube 113 and the power supply voltage terminal of the bias current generating circuit 210. The conduction state of the fifth switch tube 114 is also controlled by the power supply voltage of the bias current generating circuit 210, and the fifth switch tube 114 can further control the transmission of current.

[0146] In some embodiments, the sixth switch tube 115 can be an n-type MOSFET, the drain of the sixth switch tube 115 is connected to the source of the fifth switch tube 114, the gate of the sixth switch tube 115 is connected to the control end of the fifth switch tube 114 and the power supply voltage end of the bias current generating circuit 210, and there is a first node between the drain of the sixth switch tube 115 and the source of the fifth switch tube 114, and the first node is used to output a digital signal of the power supply voltage.

[0147] In some embodiments, the seventh switch tube 116 can be an n-type MOSFET, the drain of the seventh switch tube 116 is connected to the source of the sixth switch tube 115, the gate of the seventh switch tube 116 is connected to the gate of the sixth switch tube 115 and the power supply voltage end of the bias current generating circuit 210, and the source of the seventh switch tube 116 is connected to the negative voltage source.

[0148] Specifically, a potential flip threshold voltage (VDDLB) can be preset, and when the power supply voltage (VDDL) of the bias current generating circuit 210 is greater than the potential flip threshold voltage (VDDLB), the voltage outputted by the first node will flip. In other words, the voltage outputted by the first node can flip according to the voltage level of VDDL, from a high potential to a low potential, or vice versa. This voltage flip is the manifestation of a digital signal (e.g., logic 0 and logic 1).

[0149] In some embodiments, the potential reversal threshold voltage can be determined by the current pulling capability of the fourth switch tube 113 (P-type MOSFET), the fifth switch tube 114 (P-type MOSFET), the sixth switch tube 115 (N-type MOSFET), and the seventh switch tube 116 (N-type MOSFET). Specifically, the two P-type MOSFETs can pull current from the positive voltage source to the first node when they are turned on. When the current pulling capability of the fourth switch tube 113 (P-type MOSFET) and the fifth switch tube 114 (P-type MOSFET) is strong, the voltage of the first node is more difficult to drop, thereby increasing the potential reversal threshold voltage. When the two N-type MOSFETs are turned on, the current can be pulled from the first node to the negative voltage source. When the current pulling capability of the sixth switch tube 115 (N-type MOSFET) and the seventh switch tube 116 (N-type MOSFET) is strong, the voltage of the first node is easier to be pulled down, thereby reducing the potential reversal threshold voltage.

[0150] Figure 4 is a circuit diagram of a power supply voltage detector 110 according to yet another embodiment of the present invention. Figure 4 As shown, the power supply voltage detector 110 includes a voltage dividing circuit unit 117 and a comparator 118 .

[0151] The voltage divider circuit unit 117 is a circuit for dividing the voltage between the positive voltage source and the negative voltage source into two parts. Such a circuit may include two resistors or a resistor voltage divider network, and its function is to obtain a voltage divider signal proportional to the input voltage according to the input voltage source.

[0152] In some embodiments, a first terminal of the voltage divider circuit unit 117 is connected to a positive voltage source, and a second terminal of the voltage divider circuit unit 117 is connected to a negative voltage source, so as to obtain a voltage divider signal.

[0153] like Figure 4As shown, the voltage divider circuit unit 117 includes: a first resistor 1171 and a second resistor 1172. The first end of the first resistor 1171 is connected to a positive voltage source, the second end of the first resistor 1171 is connected to a first end of the second resistor 1172, a second node is provided between the first end of the second resistor 1172 and the second end of the first resistor 1171, the second node is connected to a positive input end of the comparator 118 to output a voltage divider signal, and the second end of the second resistor 1172 is connected to a negative voltage source. In some embodiments, the specific calculation formula of the voltage divider signal is as follows:

[0154]

[0155] Among them, V ref is the voltage division signal, R1 is the first resistor, R2 is the second resistor, V VDDA is the voltage of the positive voltage source, V VSSA is the voltage of the negative voltage source.

[0156] In some embodiments, the comparator 118 is an electronic component for comparing the voltages of two input signals and outputting a digital signal corresponding to the input voltage comparison result. The positive input terminal of the comparator 118 is connected to the output terminal of the voltage divider circuit unit 117, and the negative input terminal of the comparator 118 inputs the power supply voltage of the bias current generating circuit 210. The comparator 118 is used to output a digital signal of the power supply voltage according to the voltage divider signal and the power supply voltage.

[0157] Specifically, Figure 4 As shown, by using the method of comparing the voltage division signal V1 generated by the voltage division circuit unit 117 with the power supply voltage VDDL of the bias current generating circuit 210 by using the comparator 118, when the power supply voltage VDDL is less than the voltage division signal V1, the digital signal of the power supply voltage output by the comparator 118 is a high potential. When the power supply voltage VDDL is greater than the voltage division signal V1, the potential of the digital signal of the power supply voltage output by the comparator 118 is flipped to a low potential.

[0158] In some embodiments, the method using the voltage divider circuit unit 117 and the comparator 118 can achieve more accurate power supply voltage detection of the bias current generating circuit 210 compared to the circuit design of multiple switch tubes, but the cost and power consumption are increased accordingly. Therefore, the method of detecting the power supply voltage can be selected according to the design requirements and performance requirements of the circuit, and no specific limitation is made here.

[0159] In some embodiments, the first inverter is a logic circuit for performing a logical inversion on an input signal. The input terminal of the first inverter is connected to the output terminal of the power supply voltage detector 110, and is used to perform an inverse process on the digital signal output by the power supply voltage detector 110 to generate a signal that is logically opposite to the original power supply voltage signal, i.e., a first power supply voltage inverse signal. For example, when the power supply voltage detector 110 outputs a high level signal, the first inverter will output a low level signal, and vice versa.

[0160] Therefore, the function of the inverter is to invert the logic state of the power supply voltage signal so that the subsequent processing circuit (such as the delay filter 130) can generate a power-on reset signal under a specific voltage condition. This is to ensure that the system is in a reset state before the power supply voltage reaches a stable value.

[0161] In some embodiments, the delay filter 130 is a circuit module for delaying a signal and filtering out short-term noise or interference. The input end of the delay filter 130 is connected to the output end of the first inverter, and is used to generate a power-on reset signal (PORB) according to the first power supply voltage reverse signal (VDDL1) to ensure that the system starts to work normally only after the power supply voltage is stable.

[0162] In some embodiments, the delay filter 130 of the embodiment of the present invention may include the following two circuit structures, as shown below: Figure 5 and Figure 6 The delay filter 130 is described in detail.

[0163] Figure 5 is a circuit diagram of a delay filter according to an embodiment of the present invention, such as Figure 5 As shown, the delay filter 130 includes a delay generator 131 and a Schmitt trigger 132 .

[0164] In some embodiments, the delay generator 131 is a circuit component for generating a delay signal. The delay generator 131 is connected to the output end of the first inverter, and is used to generate a delay signal according to the first power supply voltage reverse signal. The main function of the delay generator 131 is to introduce a certain delay, which is very important for the stability of the circuit startup process. At the moment when the power supply voltage reaches a certain threshold, there may be some transient noise or voltage fluctuations. If a power-on reset signal is generated immediately, false triggering may occur due to these noises. Therefore, by introducing a short delay, it can be ensured that the power supply voltage is truly stabilized at the expected value before triggering subsequent operations.

[0165] In some embodiments, Figure 5As shown, the delay generator 131 includes an eighth switch tube 1311 , a ninth switch tube 1312 , a tenth switch tube 1313 , an eleventh switch tube 1314 and a first capacitor 1315 .

[0166] In some embodiments, the eighth switch tube 1311 can be a p-type MOSFET, the drain of the eighth switch tube 1311 is connected to the positive voltage source, and the gate of the eighth switch tube 1311 is connected to the output end of the first inverter. The main function of the eighth switch tube 1311 is to output the positive voltage source to the ninth switch tube 1312 through its source, and is controlled by the output of the first inverter. When the output of the first inverter is at a low level, the eighth switch tube 1311 is turned on, and the current flows from the positive voltage source through the eighth switch tube 1311 to the source of the ninth switch tube 1312. This part of the circuit forms a pull-up current path for the delay generator 131.

[0167] In some embodiments, the ninth switch tube 1312 can be an n-type MOSFET, the drain of the ninth switch tube 1312 is connected to the source of the eighth switch tube 1311, the gate of the ninth switch tube 1312 is connected to the bias voltage terminal of the bias current generating circuit 210, and there is a third node between the drain of the ninth switch tube 1312 and the source of the eighth switch tube 1311, and the third node is connected to the Schmitt trigger 132 to transmit the delay signal. The function of the ninth switch tube 1312 is to control the voltage level of the third node, which is controlled by the bias voltage of the bias current generating circuit 210. When the bias voltage reaches a certain level, the ninth switch tube 1312 is turned on, allowing current to pass, thereby affecting the voltage of the third node.

[0168] In some embodiments, the tenth switch tube 1313 may be an n-type MOSFET, the drain of the tenth switch tube 1313 is connected to the source of the ninth switch tube 1312, the source of the tenth switch tube 1313 is connected to the negative voltage source, and the gate of the tenth switch tube 1313 is connected to the bias voltage terminal of the bias current generating circuit 210. The tenth switch tube 1313 works together with the ninth switch tube 1312 to jointly determine the voltage of the third node. The conduction state of the tenth switch tube 1313 is also controlled by the bias voltage. When the bias voltage increases, the tenth switch tube 1313 may be turned on, thereby pulling the voltage of the third node down to a voltage close to the negative voltage source.

[0169] In some embodiments, the eleventh switch tube 1314 can be an n-type MOSFET, the gate of the eleventh switch tube 1314 is connected to the third node and the Schmitt trigger 132, and the source and drain of the eleventh switch tube 1314 are connected to the negative voltage source. The main function of the eleventh switch tube 1314 is to ensure that during the delay process, the bias voltage of the bias current generating circuit 210 can reliably and gradually drop to a lower potential, and the bias voltage will not be too high due to the charging and discharging process of the first capacitor 1315. Its existence enhances the pull-down capability of the circuit and ensures the stability and controllability of the delay.

[0170] In some embodiments, the first end of the first capacitor 1315 is connected to the third node and the Schmitt trigger 132, and the second end of the first capacitor 1315 is connected to the negative voltage source. The role of the first capacitor 1315 is to introduce the smoothness and delay of the voltage change. Because the capacitor has a charge and discharge characteristic, when the bias voltage begins to decline, the first capacitor 1315 can be gradually discharged, so that the bias voltage slowly declines over a period of time, thereby generating a slow falling edge, and achieving the effect of time delay. The capacitance value of the first capacitor 1315 can affect the slope of this falling edge, thereby affecting the length of the time delay.

[0171] Specifically, in the circuit of the delay generator 131, initially, the output voltage of the first inverter is at a low potential, while the bias voltage is at a high potential. This means that in the initial state of the circuit, the eighth switch tube 1311 is turned on and attempts to keep the bias voltage at a high potential through a pull-up path. When the output voltage of the first inverter gradually rises, the pull-up capability of the eighth switch tube 1311 will gradually weaken. At the same time, the ninth switch tube 1312 and the tenth switch tube 1313 begin to pull down the potential of the bias voltage terminal of the bias current generating circuit 210 more effectively. When the pull-down capability of the ninth switch tube 1312 and the tenth switch tube 1313 exceeds the pull-up capability of the eighth switch tube 1311, the potential of the bias voltage terminal begins to be pulled down. Since the first capacitor 1315 is included in the circuit design, the potential of the bias voltage terminal will not drop immediately. The first capacitor 1315 provides a slow voltage drop by gradually discharging, thereby generating a delay in the circuit. This delay can be designed to a specific time interval to ensure that the circuit has enough time to stabilize during startup and avoid malfunction due to voltage fluctuations.

[0172] In some embodiments, the Schmitt trigger 132 is a circuit component with hysteresis characteristics, which is used to process the input signal. The Schmitt trigger 132 is connected to the delay generator 131, receives the delay signal output by the delay generator 131, and converts it into a power-on reset signal.

[0173] Specifically, the Schmitt trigger 132 can effectively eliminate noise and jitter in the delay signal through its hysteresis characteristics, thereby ensuring the stability of the power-on reset signal. The hysteresis characteristic means that the input signal needs to reach a certain high and low level difference to trigger the change of the output signal, which can prevent frequent triggering due to slight voltage fluctuations. When the delay signal reaches the trigger threshold of the Schmitt trigger 132, the Schmitt trigger 132 can output a stable power-on reset signal. This signal is usually used to reset other parts in the circuit to put the system into a known initial state. This is very important to ensure reliable startup of the system.

[0174] In some embodiments, Figure 5 As shown, the Schmitt trigger 132 includes a twelfth switch tube 1321 , a thirteenth switch tube 1322 , a fourteenth switch tube 1323 and a fifteenth switch tube 1324 .

[0175] In some embodiments, the twelfth switch tube 1321 can be a p-type MOSFET, the drain of the twelfth switch tube 1321 is connected to the positive voltage source, and the gate of the twelfth switch tube 1321 is connected to the third node, the gate of the eleventh switch tube 1314 and the first end of the first capacitor 1315.

[0176] In some embodiments, the thirteenth switch tube 1322 can be an N-type MOSFET, the drain of the thirteenth switch tube 1322 is connected to the source of the twelfth switch tube 1321, the gate of the thirteenth switch tube 1322 is connected to the third node, the gate of the eleventh switch tube 1314 and the first end of the first capacitor 1315, and there is a fourth node between the drain of the thirteenth switch tube 1322 and the source of the twelfth switch tube 1321.

[0177] In some embodiments, the fourteenth switch tube 1323 can be an N-type MOSFET, the drain of the fourteenth switch tube 1323 is connected to the source of the thirteenth switch tube 1322, the source of the fourteenth switch tube 1323 is connected to the negative voltage source, and the gate of the fourteenth switch tube 1323 is connected to the third node, the gate of the eleventh switch tube 1314 and the first end of the first capacitor 1315.

[0178] In some embodiments, the fifteenth switch tube 1324 can be an N-type MOSFET, the source of the fifteenth switch tube 1324 is connected to the source of the thirteenth switch tube 1322 and the drain of the fourteenth switch tube 1323, the drain of the fifteenth switch tube 1324 is connected to the positive voltage source, and the gate of the fifteenth switch tube 1324 is connected to the fourth node to output a power-on reset signal.

[0179] In some embodiments, when the input signal of a common inverter reaches a certain critical voltage, the state of the inverter will flip (for example, from a high level to a low level or from a low level to a high level). This flip point is unique, that is, when the input voltage approaches this critical point, any small disturbance or noise signal may cause an unstable jump of the output signal, resulting in false triggering. This false triggering is particularly prone to occur when the circuit is powered on or in a sensitive state.

[0180] The Schmitt trigger 132 effectively avoids output instability caused by small fluctuations of the input signal near the critical point by setting two critical voltages (upper limit and lower limit) on the input signal. Specifically, when the input signal gradually rises and exceeds the upper critical voltage, the output signal of the Schmitt trigger 132 can be flipped from a low level to a high level. When the input signal gradually decreases and is lower than the lower critical voltage, the output signal can be flipped from a high level to a low level. In the area between these two critical voltages, that is, within the hysteresis window voltage range, slight changes in the input signal will not affect the output state, avoiding false triggering of the circuit by noise, thereby providing good immunity to noise signals.

[0181] Specifically, when the voltage of the third node is low, the twelfth switch tube 1321 is turned on, and the positive voltage source is transmitted to the fourth node through the twelfth switch tube 1321 and the thirteenth switch tube 1322. In this process, since the fourteenth switch tube 1323 is not turned on, the potential of the fourth node rises, so that the fifteenth switch tube 1324 is turned off, and the output maintains a high potential (logic "1").

[0182] Furthermore, as the voltage at the third node increases, the conduction degree of the twelfth switch tube 1321 decreases, and the thirteenth switch tube 1322 begins to conduct, gradually lowering the potential of the fourth node. When the voltage at the third node further increases to the threshold of the fourteenth switch tube 1323, the fourteenth switch tube 1323 also conducts, and the potential of the fourth node is more effectively lowered.

[0183] Furthermore, when the potential of the fourth node is pulled down to a certain critical value, the fifteenth switch tube 1324 is turned on, pulling down the output voltage and outputting logic “0”. This is the first critical voltage point of the Schmitt trigger 132 .

[0184] Furthermore, when the input voltage is decreasing, due to the design of the Schmitt trigger 132, the voltage of the third node needs to drop to a threshold lower than the initial flipping threshold in order to turn on the twelfth switch tube 1321 again. The potential of the fourth node rises again, thereby flipping the output voltage to logic "1". This design ensures that a small fluctuation of the input voltage near the critical voltage point will not cause frequent changes in the output signal, forming a hysteresis characteristic.

[0185] Therefore, the Schmitt trigger 132 realizes the anti-noise hysteresis characteristic through different critical voltages in the rising and falling processes, thereby ensuring the stability and reliability of the circuit in a noisy environment.

[0186] Figure 6 is a circuit diagram of a delay filter according to another embodiment of the present invention, as shown in Figure 6 As shown, the delay filter 130 includes: a plurality of D flip-flops 133 .

[0187] In some embodiments, the D flip-flop 133 is a basic digital circuit element, which is widely used in timing circuits. Its characteristic is that when the rising edge (or falling edge) of the clock signal arrives, the D flip-flop 133 latches the signal at the input end (D end) to the output end (Q end), and maintains this state within the clock cycle. Among them, the function of the input end (D end) of the D flip-flop 133 is to receive the signal, and when the clock signal is valid, the signal is latched. The function of the clock end (CLK end) of the D flip-flop 133 is to determine the sampling time of the D flip-flop 133. The function of the output end (Q end) of the D flip-flop 133 is to output the latched signal.

[0188] In some embodiments, multiple D flip-flops 133 are connected in series, and the multiple D flip-flops 133 use the same clock signal. The input end of the first D flip-flop 133 among the multiple D flip-flops 133 connected in series is connected to the output end of the first inverter, so as to delay the reverse signal of the first power supply voltage and output a power-on reset signal.

[0189] Specifically, multiple D flip-flops 133 share the same clock signal, and each rising edge (or falling edge) of the clock signal triggers the sampling and latching action of the D flip-flop 133. Since these D flip-flops 133 are connected in series, the output of the first D flip-flop 133 is used as the input of the second D flip-flop 133, and so on. Therefore, it takes multiple clock cycles for the signal to be transmitted from the first D flip-flop 133 to the output of the last D flip-flop 133. Since each D flip-flop 133 requires a clock cycle to process the input signal, the more D flip-flops 133 are connected in series, the longer the signal delay will be.

[0190] In some embodiments, the D flip-flop 133 is designed so that it samples the signal only at the effective edge of the clock. This feature has a natural filtering function for noise signals. Specifically, the effective edge (such as the rising edge) of the clock signal is very short in time, which means that the D flip-flop 133 can only sample the signal at this short moment. Therefore, most of the noise in the clock cycle will not be latched to the output. Even if there is a noise signal near the effective edge of the clock, the noise usually does not last long enough to affect the output of the subsequent cascaded D flip-flop 133. In this way, by connecting multiple D flip-flops 133 in series, it is difficult for a short noise signal to continue for multiple clock cycles, thereby effectively filtering out these interferences.

[0191] In addition, it is assumed that the moment when the bias voltage is established is t0, and the moment when the potential is reversed after the delay is t1. By connecting multiple D flip-flops 133 in series, the occurrence time of t1 can be accurately controlled to be slightly later than t0, thereby ensuring that the bias startup control module 1 is automatically turned off after the startup function is completed. Specifically, by adjusting the number of series-connected D flip-flops 133, the specific time point of t1 can be set to ensure that the bias startup control module 1 is turned off at t1. As long as t1 is set at a time point greater than t0, the function of the bias startup control module 1 can be turned off as expected, thereby avoiding the increase in power consumption or circuit stability problems that may be caused by long-term operation. This timing control ensures that after the startup process is completed, the system can automatically turn off the bias startup control module 1 without the need for additional control logic. This automatic shutdown mechanism reduces system complexity and improves the reliability of the startup process.

[0192] In some embodiments, Figure 2 As shown, the latch subunit 12 includes: a latch 121, a first NOR gate 122 and a second inverter.

[0193] The latch 121 is a commonly used logic element in the storage circuit, which is used to latch the input signal and maintain its state until the trigger condition changes. The input end of the latch 121 is connected to the output end of the power-on reset subunit 11, and is used to generate a latch signal according to the power-on reset signal (PORB) and the external control signal.

[0194] In some embodiments, the first NOR gate 122 (NOR gate) is a basic logic gate circuit. The first input end of the first NOR gate 122 is connected to the output end of the latch 121, and the second input end of the first NOR gate 122 inputs the first external control signal. The function of the first NOR gate 122 is to generate a logic signal under the joint action of the latch signal and the external control signal. If any one of the latch signal and the first external control signal is at a high level, the output of the NOR gate will be at a low level. Only when both are at a low level, the output is at a high level. This allows the system to be flexibly controlled in multiple states.

[0195] In some embodiments, the input terminal of the second inverter is connected to the output terminal of the first NOR gate 122, so as to invert the output signal of the first NOR gate 122 to obtain a switch signal.

[0196] In some embodiments, the latch 121 includes: a second NOR gate 1211 and a third NOR gate 1212. The first input terminal of the second NOR gate 1211 is connected to the output terminal of the power-on reset subunit 11, and this connection ensures that the power-on reset signal directly affects the generation of the latch signal. The second input terminal of the second NOR gate 1211 is suitable for inputting a second external control signal, which provides an additional external control input for further adjusting the generation conditions of the latch signal. The output terminal of the second NOR gate 1211 is connected to the first input terminal of the first NOR gate 122 to output the latch signal. This output signal will directly affect the behavior of the first NOR gate 122, thereby controlling subsequent logic processing.

[0197] In some embodiments, the first input terminal of the third NOR gate 1212 is connected to the third external control signal, which provides an additional external condition for further controlling the generation of the latch signal. The second input terminal of the third NOR gate 1212 is connected to the output terminal of the second NOR gate 1211, which means that the output of the third NOR gate 1212 will be generated based on the output of the second NOR gate 1211 and the third external control signal. The output terminal of the third NOR gate 1212 is connected to the third input terminal of the second NOR gate 1211. This connection forms a feedback loop so that the state of the latch 121 can be maintained or modified under certain conditions.

[0198] Specifically, the power-on reset subunit 11 outputs a power-on reset signal after the power supply voltage reaches a stable state. This signal is directly involved in the generation process of the latch signal by connecting to the first input terminal of the second NOR gate 1211. The second external control signal and the third external control signal are respectively connected to the input terminals of the second NOR gate 1211 and the third NOR gate 1212, and are used to adjust the generation of the latch signal. By introducing these external control signals, the system can flexibly control the state of the latch 121 according to different external conditions. The output of the third NOR gate 1212 is connected to the third input terminal of the second NOR gate 1211 to form a feedback loop. This feedback mechanism can lock the state of the latch signal under certain conditions, thereby improving the stability of the system. Finally, the output signal of the second NOR gate 1211 is sent to the first NOR gate 122 as a latch signal, further affecting the generation of the switch signal in the system.

[0199] In some embodiments, the output end of the logic control unit is also suitable for connecting to the second RC filter structure, so as to be turned on when the switch signal output by the logic control unit corresponds to the quick start function, so as to short-circuit the second resistor unit in the second RC filter structure. This will reduce the time constant of the second RC filter structure, speed up the charging speed of the capacitor in the second RC filter structure, and thus achieve quick start of the voltage stabilization circuit.

[0200] The second RC filter structure is used to filter the reference voltage of the voltage stabilization circuit. Through filtering, the influence of noise and fluctuation in the power supply voltage on the reference voltage of the voltage stabilization circuit is reduced, thereby ensuring the stability of the output of the voltage stabilization circuit. The voltage stabilization circuit and the bias current generation circuit are located in the same on-chip power supply system. This integrated design helps to reduce the volume and power consumption of the system and improve the overall performance of the system.

[0201] In some embodiments, Figure 7 As shown, the third external control signal (PDA) is consistent with the timing of the power switch signal of the on-chip power supply system 2000 where the bias current generating circuit 210 is located. Specifically, if the bias startup control module 1 is started before the power supply of the on-chip power supply system 2000 is not stable, it may cause the bias current generating circuit 210 to generate an erroneous output, thereby affecting the normal operation of the entire system. By synchronizing the timing, the latch 121 will only allow the bias current generating circuit 210 to start after the power supply is stable, thereby avoiding such problems. In addition, if the timing of the power switch signal and the third external control signal is inconsistent, it may cause a logical competition condition, causing the system to be unstable during the startup process. By maintaining a consistent timing, this competition can be effectively avoided to ensure the stability of the system startup process.

[0202] In some embodiments, the first switch tube 20 is also used to disconnect when the switch signal corresponds to turning off the quick start function, so as to restore the RC filtering function of the first RC filtering structure 21. Among them, the quick start function can be achieved by quickly increasing the bias current to accelerate the startup process of the system. However, this quick start function may generate some unnecessary noise or interference after the system starts. Therefore, after the system startup is completed, it should be switched back to the conventional filtering state to ensure the stability of the system and reduce noise interference. The first RC filtering structure 21 is used to smooth the power supply voltage to filter out high-frequency noise and power supply fluctuations. The restoration of the first RC filtering structure 21 is to ensure that after the quick start phase, the system can return to a stable working state and provide a smooth power supply voltage supply.

[0203] In general, in the initial state before the quick start function is turned on, the power supply voltage of the bias current generating circuit 210 is 0, the signal output by the power-on reset subunit 11 is 0 (low potential), and the third external control signal is 1 (high potential). When the first external control signal and the second external control signal are both 0 (low potential), the function is turned on normally. The latch signal output by the latch 121 is at a high potential, and according to the high potential, the power switch signal is always kept at a high potential. Since the power switch signal is at a high potential, the first switch tube 20 is turned on, and the quick start function is enabled during the startup process. When the quick start function is turned on, the first resistor 1171 in the first RC filter structure 21 is short-circuited, and the filter capacitor is pre-charged. This reduces the time constant of the first RC filter structure 21, so that the power supply voltage stabilizes more quickly, achieving the effect of quick start. The power supply voltage will be continuously detected during the startup process. If the power supply voltage is higher than the set value, the digital signal output by the power supply voltage detector 110 will flip. The delay filter 130 processes the digital signal output by the power supply voltage detector 110 to ensure that the flip signal will affect the switch state only after a reasonable delay. The delay setting needs to ensure that the switch signal potential flip occurs after the bias voltage is established, and the first switch tube 20 is turned off, thereby realizing the automatic shutdown of the fast start function to restore the RC filtering function of the first RC filtering structure 21.

[0204] The second embodiment of the present invention further proposes an RC filter module, such as Figure 1 As shown, the RC filter module 2 includes: a first RC filter structure 21.

[0205] In some embodiments, the first RC filter structure 21 includes a first resistor unit 201 and a first capacitor unit 202. The first end of the first resistor unit 201 is connected to the bias voltage end of the bias current generating circuit 210 and the first end of the first switch tube 20 of the bias startup control module 1 described in the above embodiment, the second end of the first resistor unit 201 is connected to the first end of the first capacitor unit 202 and the second end of the first switch tube 20, and the second end of the first capacitor unit 202 is connected to the negative voltage source, for filtering the bias voltage of the bias current generating circuit 210.

[0206] According to the RC filter module 2 of the embodiment of the present invention, by designing the first RC filter structure 21, it can be used to filter the bias voltage in the bias current generating circuit 210 to ensure the stability of the bias voltage. During the startup process of the bias current generating circuit 210, when the logic control unit 10 of the bias startup control module 1 detects that the power supply voltage reaches a certain condition, a switch signal can be generated to turn on the first switch tube 20, and this turn-on action short-circuits the first resistance unit 201. Since the time constant of the RC filter structure is determined by the product of resistance and capacitance, after short-circuiting the first resistance unit 201, the time constant is greatly reduced. This change speeds up the charging speed of the filter capacitor, so that the capacitor is charged to the required voltage faster, thereby accelerating the establishment process of the power supply voltage. This directly shortens the startup time of the bias current generating circuit 210, so that the bias current can reach a stable state faster, thereby improving the startup efficiency of the overall circuit.

[0207] In some embodiments, the RC filter module 2 further includes: a pre-charge control unit 22. In the fast startup process, in order to shorten the response time of the RC filter module 2, the pre-charge control unit 22 is responsible for pre-charging the first capacitor unit 202. This means that at startup, the capacitor is quickly charged to a value close to the target voltage, which greatly shortens the charging time constant of the RC filter module 2, allowing the circuit to enter a stable state faster, thereby speeding up the startup speed of the circuit.

[0208] In some embodiments, the pre-charge control unit 22 is connected to the logic control unit 10 of the bias start control module 1 and the first end of the first capacitor unit 202, and is used to perform pre-charge control on the first capacitor unit 202. This means that the action of the pre-charge control unit 22 is controlled by the logic control unit 10 of the bias start control module 1. The logic control unit 10 decides whether to start the pre-charge control according to the state of the system (such as power supply voltage, external control signal, etc.). Through this design, it can be ensured that the pre-charge process is started at the right time and will not affect the normal filtering function.

[0209] like Figure 1As shown, the first resistance unit 201 includes: a sixteenth switch tube 2011 and a third resistor 2012. The sixteenth switch tube 2011 can be an n-type MOSFET, the drain of the sixteenth switch tube 2011 is connected to the bias voltage terminal of the bias current generating circuit 210 and the drain of the first switch tube 20, and the gate of the sixteenth switch tube 2011 is connected to the power supply voltage terminal of the bias current generating circuit 210. The first end of the third resistor 2012 is connected to the source of the sixteenth switch tube 2011, and the second end of the third resistor 2012 is connected to the first end of the pre-charge control unit 22 and the source of the first switch tube 20. Since the current always chooses the path with the least impedance, when the first switch tube 20 is turned on, the current will preferentially pass through the channel of the first switch tube 20, and no longer pass through the sixteenth switch tube 2011 and the third resistor 2012. In this way, the functions of the sixteenth switch tube 2011 and the third resistor 2012 are shielded by the short-circuit effect. At this time, they no longer participate in the function of the filtering circuit 93, reducing the time constant of the first RC filtering structure 21 and speeding up the charging speed of the capacitor, thereby achieving rapid startup of the bias current generating circuit 210.

[0210] For example Figure 1 As shown, the first capacitor unit 202 includes: a second capacitor 2021 and a seventeenth switch tube 2022. Among them, the second capacitor 2021 is a part of the first capacitor unit 202, and its main function is to cooperate with the third resistor 2012 to filter the bias voltage. Through filtering, the circuit can smooth the high-frequency noise in the power supply voltage, so that the output of the bias current generating circuit 210 is more stable.

[0211] In some embodiments, the first end of the second capacitor 2021 is connected to the second end of the third resistor 2012, the first end of the pre-charge control unit 22, and the source of the first switch tube 20, and the second end of the second capacitor 2021 is connected to the negative voltage source.

[0212] In some embodiments, the seventeenth switch tube 2022 can be an n-type MOSFET, the gate of the seventeenth switch tube 2022 is connected to the second end of the second resistor 1172, the first end of the second capacitor 2021, the first end of the pre-charge control unit 22 and the source of the first switch tube 20, and the source and drain of the seventeenth switch tube 2022 are both connected to the negative voltage source.

[0213] Specifically, when the first switch tube 20 is turned on, the sixteenth switch tube 2011 and the third resistor 2012 are short-circuited. The pre-charge control unit 22 quickly pre-charges the second capacitor 2021 by controlling the seventeenth switch tube 2022. This process reduces the time constant of the first RC filter structure 21 and realizes the rapid startup of the bias current generating circuit 210. As the power supply voltage of the bias current generating circuit 210 rises and stabilizes, the output signal of the power supply voltage detector 110 flips, and the delay filter 130 ensures that the first switch tube 20 is turned off at the right time. At this time, the sixteenth switch tube 2011 and the third resistor 2012 resume normal filtering functions, and the second capacitor 2021 continues to play a role in the filtering process.

[0214] In some embodiments, the pre-charge control unit 22 of the embodiment of the present invention may include the following two circuit structures, as shown below: Figure 8 and Fig.11 The pre-charge control unit 22 is described in detail.

[0215] Figure 8 is a circuit diagram of a pre-charge control unit according to an embodiment of the present invention. Figure 8 As shown, the pre-charge control unit 22 includes: a fourth NOR gate 221 , an eighteenth switch tube 222 and a fourth resistor 223 .

[0216] In some embodiments, the fourth NOR gate 221 has two input terminals and one output terminal. The first input terminal of the fourth NOR gate 221 is connected to the output terminal of the logic control unit 10 of the bias startup control module 1, and the connection enables the NOR gate to receive a control signal from the logic control unit 10. The second input terminal of the fourth NOR gate 221 is suitable for inputting a third external control signal, and the third external control signal is consistent with the timing of the power supply signal of the on-chip power supply system 2000 where the bias current generating circuit 210 is located. The third external control signal reflects the startup and working status of the on-chip power supply, so that the pre-charge control unit 22 can work synchronously with the power supply timing of the overall system.

[0217] In some embodiments, the eighteenth switch tube 222 may be an n-type MOSFET, the gate of the eighteenth switch tube 222 is connected to the output end of the fourth NOR gate 221, and the drain of the eighteenth switch tube 222 is connected to the positive voltage source. When the fourth NOR gate 221 outputs a high level, the eighteenth switch tube 222 is turned on, so that the positive voltage source is connected to the fourth resistor 223 through its drain-source path, thereby providing a pre-charge voltage to the second capacitor 2021. This helps to quickly establish the charge state of the capacitor at startup.

[0218] In some embodiments, a first end of the fourth resistor 223 is connected to the source of the eighteenth switch tube 222, and a second end of the fourth resistor 223 is connected to the second end of the third resistor 2012, the first end of the second capacitor 2021, the gate of the seventeenth switch tube 2022, and the source of the first switch tube 20. The fourth resistor 223 is used to control the magnitude of the current flowing to the second capacitor 2021 when the eighteenth switch tube 222 is turned on, so as to avoid excessive current causing circuit instability or damage.

[0219] Specifically, in the initial state, the first switch tube 20 is in the off state, the output signal of the fourth NOR gate 221 is at a low level, the eighteenth switch tube 222 is in the off state, and the second capacitor 2021 is not charged. When the logic control unit 10 and the external control signal make the output signal of the fourth NOR gate 221 become high level, the eighteenth switch tube 222 is turned on. At this time, the positive voltage source is transmitted to the fourth resistor 223 through the drain and source of the eighteenth switch tube 222, and further transmits the current to the second capacitor 2021 and the seventeenth switch tube 2022 through the fourth resistor 223, that is, Figure 8 At the same time, the logic control unit 10 generates a high-potential switch signal according to the power supply voltage of the bias current generating circuit 210 and the external control signal to turn on the first switch tube 20, thereby forming a path b from the first switch tube 20 to the second capacitor 2021 and the seventeenth switch tube 2022. Through these two paths, the second capacitor 2021 and the seventeenth switch tube 2022 are quickly pre-charged.

[0220] Furthermore, during the charging process, the resistance of the fourth resistor 223 can be adjusted to ensure that the path a can provide appropriate charging capacity and ensure that the capacitor can be charged quickly. In addition, the fourth resistor 223, the second capacitor 2021 and the seventeenth switch tube 2022 also play a role in filtering a portion of the noise coupled from the positive voltage source VDDA when the eighteenth switch tube 222 is turned off, thereby reducing the impact of the noise on the circuit.

[0221] In some embodiments, the fourth NOR gate 221 is used to obtain an enable signal (EN) according to the switch signal (SW) output by the logic control unit 10 and the third external control signal (PDA), and the enable signal corresponds to the delay signal generated by the delay filter 130 in the logic control unit 10.

[0222] Specifically, Fig. 9 As shown, the enable signal is used to control the occurrence of the pre-charging process. The pre-charging process occurs under the delay Δt provided by the delay filter 130, rather than under the timing controlled by the power switch signal of the on-chip power supply system 2000 where the bias current generating circuit 210 is located, thus avoiding Fig.10As shown, when the third external control signal = 1 (high level), leakage current is generated in the path of the eighteenth switch tube 222, the fourth resistor 223, the first switch tube 20, and the twenty-fifth switch tube 341. This is because at the moment when the power switch signal is switched, the pre-charging process is delayed due to the existence of the delay Δt, thereby avoiding the possible power supply instability period.

[0223] In some embodiments, the eighteenth switch tube 222 is turned on under the delayed signal to charge the first capacitor unit 202 together with the path of the first switch tube 20 .

[0224] Specifically, when the delay signal is activated, the eighteenth switch tube 222 is turned on under the specific delay signal, so that the positive voltage source provides a charging path for the second capacitor 2021 through the eighteenth switch tube 222 and the fourth resistor 223. At the same time, the path between the first switch tube 20 and the second capacitor 2021 also provides a charging path for the second capacitor 2021. These two paths form a parallel path to charge the first capacitor unit 202 together. This design can improve the charging speed and efficiency, ensuring that the first capacitor unit 202 can quickly reach the required voltage level in the pre-charging stage.

[0225] The introduction of the delay signal ensures that the eighteenth switch tube 222 will not be turned on too early during the entire circuit startup process, but will be turned on at a specific moment in the pre-charging stage, thereby cooperating with the first switch tube 20 to provide the necessary charging current for the first capacitor unit 202. This delay signal is generated by the delay filter 130 of the logic control unit 10, which can control the turn-on timing of the eighteenth switch tube 222 by setting an appropriate delay Δt, thereby avoiding circuit instability or leakage current problems caused by insufficient charging or timing errors when the system power supply is just started.

[0226] Fig.11 is a circuit diagram of a pre-charge control unit according to another embodiment of the present invention, as shown in Fig.11 As shown, the pre-charge control unit 22 further includes: a third inverter 224 and a nineteenth switch tube 225 .

[0227] In some embodiments, the input end of the third inverter 224 is connected to the output end of the fourth NOR gate 221. The function of the third inverter 224 is to invert the output signal from the fourth NOR gate 221. Through inversion, the third inverter 224 can generate a control signal opposite to the output signal of the fourth NOR gate 221. Therefore, when the output signal of the fourth NOR gate 221 is a high level, the third inverter 224 outputs a low level, so that the nineteenth switch tube 225 is in a closed state, blocking the charging path in which it is located. When the output signal of the fourth NOR gate 221 is a low level, the third inverter 224 outputs a high level, so that the nineteenth switch tube 225 is turned on, thereby establishing a new charging path.

[0228] In some embodiments, the nineteenth switch tube 225 can be an n-type MOSFET, the gate of the nineteenth switch tube 225 is connected to the output end of the third inverter 224, the drain of the nineteenth switch tube 225 is connected to the gate of the seventeenth switch tube 2022, the first end of the second capacitor 2021, the second end of the fourth resistor 223, and the second end of the third resistor 2012, and the source of the nineteenth switch tube 225 is connected to the second end of the first switch tube 20.

[0229] In some embodiments, when the eighteenth switch tube 222 is turned on, the nineteenth switch tube 225 is turned off to cut off the connection between the first end of the first capacitor unit 202 and the second end of the first switch tube 20. This means that in this state, there will be no charging path from the first switch tube 20 to the second capacitor 2021 in the circuit, which can avoid unnecessary current flow or capacitor overcharging. After the eighteenth switch tube 222 is turned on, the charging current only flows into the second capacitor 2021 through a pre-designed path without being interfered by the nineteenth switch tube 225, thereby ensuring the stability and controllability of the charging process.

[0230] Specifically, when the enable signal is at a high level, the nineteenth switch tube 225 disconnects the second capacitor 2021 and the seventeenth switch tube 2022 from the first switch tube 20. During the entire startup process of the bias current generating circuit 210, only the eighteenth switch tube 222 pre-charges the second capacitor 2021, and the first switch tube 20 completes the establishment of the bias voltage of the bias current generating circuit 210 alone, thereby realizing a quick startup function.

[0231] In some embodiments, when the nineteenth switch tube 225 is turned on, the voltage across the first capacitor unit 202 is equal to the voltage at the second end of the first switch tube 20. Specifically, by adjusting the resistance value of the fourth resistor 223, it can be ensured that when the nineteenth switch tube 225 is closed, the voltage across the first capacitor unit 202 is consistent with the voltage at the second end of the first switch tube 20. This voltage matching helps to avoid potential jitter at the second end of the first switch tube 20 caused by a change in the switch state, thereby improving the stability and reliability of the circuit.

[0232] The third aspect of the present invention also provides an RC filter module, such as Fig.12 As shown, the RC filter module 2 includes: a second RC filter structure 23 and a twentieth switch tube 24 .

[0233] In some embodiments, the second RC filter structure 23 includes a second resistor unit 231 and a second capacitor unit 232, the first end of the second resistor unit 231 is suitable for connecting to a reference voltage source, the first end of the second capacitor unit 232 is connected to the second end of the second resistor unit 231, the second end of the second capacitor unit 232 is connected to a negative voltage source, and a fifth node is provided between the first end of the second capacitor unit 232 and the second end of the second resistor unit 231, and the fifth node is suitable for connecting to the voltage stabilizing circuit 211 of the on-chip power supply system 2000. The main function of the second RC filter structure 23 is to filter the voltage provided by the reference voltage source to stabilize the output of the voltage stabilizing circuit 211.

[0234] In some embodiments, the twentieth switch tube 24 can be an n-type MOSFET, the gate of the twentieth switch tube 24 is connected to the output end of the logic control unit 10 of the bias startup control module 1 described in the above embodiment, the source of the twentieth switch tube 24 is connected to the first end of the second resistance unit 231 and the reference voltage source, and the drain of the twentieth switch tube 24 is connected to the second end of the second resistance unit 231 and the fifth node, and is used to be turned on when the switch signal output by the logic control unit 10 corresponds to turning on the quick startup function, so as to short-circuit the second resistance unit 231.

[0235] Specifically, when the twentieth switch tube 24 is turned off, the second resistor unit 231 and the second capacitor unit 232 work together to form a second RC filter structure 23. The function of the filter structure is to filter the signal, provide a smooth voltage output, and reduce noise interference. When the switch signal output by the logic control unit 10 triggers the fast start function, the twentieth switch tube 24 is turned on. The second resistor unit 231 is short-circuited, which can reduce the time constant of the second RC filter structure 23 and speed up the charging speed of the second capacitor unit 232, thereby realizing the fast start of the bias current generating circuit 210.

[0236] According to the RC filter module 2 of the embodiment of the present invention, dynamic control of the second RC filter structure 23 is achieved by combining the twentieth switch tube 24 and the logic control unit 10. Specifically, during the startup of the voltage stabilizing circuit 211, the switch signal output by the logic control unit 10 turns on the twentieth switch tube 24 to short-circuit the second resistance unit 231 in the second RC filter structure 23. Since the time constant of the second RC filter structure 23 is proportional to the product of the resistance and the capacitance, the time constant is significantly reduced after the resistance unit is short-circuited. This change speeds up the charging speed of the filter capacitor, so that the filter capacitor can be charged to the power supply voltage faster, thereby effectively shortening the startup time of the voltage stabilizing circuit 211 and improving the response speed and startup efficiency of the overall circuit.

[0237] like Fig.12 As shown, the second resistor unit 231 includes: a fifth resistor 2311 and a twenty-first switch tube 2312. Among them, the first end of the fifth resistor 2311 is connected to the reference voltage source and the source of the twentieth switch tube 24. The twenty-first switch tube 2312 can be a p-type MOSFET, the drain of the twenty-first switch tube 2312 is connected to the second end of the fifth resistor 2311, the source of the twenty-first switch tube 2312 is connected to the drain of the twentieth switch tube 24 and the fifth node, and the gate of the twenty-first switch tube 2312 is connected to the third external control signal terminal, and the third external control signal is consistent with the timing of the power supply switch signal of the on-chip power supply system 2000.

[0238] In some embodiments, the second resistance unit 231 composed of the fifth resistor 2311 and the twenty-first switch tube 2312 is implemented by a MOS resistor, which means that the fifth resistor 2311 and the twenty-first switch tube 2312 operate in a linear region and are used as a resistor. MOS resistance may refer to a resistance formed between the source and drain of a MOSFET (usually an N-type or P-type) under specific bias conditions. In this case, the MOSFET operates in a linear region (weak inversion region), and its drain-source current is linearly related to the drain-source voltage, thereby performing as a controllable resistor. By adjusting the gate voltage, the resistance value can be adjusted within a certain range. This resistor can be used to replace a traditional resistor in order to more flexibly control circuit characteristics while saving chip area and reducing costs.

[0239] In some embodiments, the second capacitor unit 232 includes: a third capacitor 2321 and a twenty-second switch tube 2322. The first end of the third capacitor 2321 is connected to the fifth node, and the second end of the third capacitor 2321 is connected to the negative voltage source. The twenty-second switch tube 2322 can be an n-type MOSFET, the gate of the twenty-second switch tube 2322 is connected to the fifth node, and the source and drain of the twenty-second switch tube 2322 are both connected to the negative voltage source.

[0240] In some embodiments, the second capacitor unit 232 formed by the third capacitor 2321 and the twenty-second switch tube 2322 is implemented by a MOS capacitor, that is, the structure of the third capacitor 2321 and the twenty-second switch tube 2322 uses the gate capacitance of MOSFET to simulate or realize the function of a capacitor. Among them, the MOS capacitor can be formed by using the gate structure of MOSFET. The capacitance between the gate and the substrate (or source / drain) of MOSFET can be used to replace the traditional capacitor. This structure uses the oxide layer of MOSFET as a dielectric, and the charge accumulation between the gate and the substrate or the diffusion layer forms a capacitor. The advantage of MOS capacitors is that they can also greatly save area and reduce costs, especially in highly integrated circuit designs.

[0241] In some embodiments, the output signal of the logic control unit 10 of the bias startup control module 1 controls the twentieth switch tube 24, thereby realizing a rapid startup of the bias current generating circuit 210. Specifically, during startup, the output signal of the logic control unit 10 is at a high level, the twentieth switch tube 24 is turned on, the second resistor unit 231 is short-circuited, the time constant is reduced, and the filtering bandwidth is increased, thereby accelerating the establishment of the power supply voltage of the bias current generating circuit 210. After the startup is completed, the output signal of the logic control unit 10 is at a low level, the twentieth switch tube 24 is turned off, and the original second RC filter structure 23 is restored.

[0242] The fourth aspect of the present invention further provides a bias current generating circuit, such as Figure 1 As shown, the bias current generating circuit 210 includes: the bias start control module 1 described in the above embodiment and the RC filter module 2 described in the above embodiment, and a bias current generating module 3 .

[0243] The bias start control module 1 is connected to the RC filter module 2 , and the bias current generation module 3 is connected to the RC filter module 2 and the bias start control module 1 respectively.

[0244] In some embodiments, the bias startup control module 1 is responsible for providing a control signal when the circuit is started to adjust the initial state of the bias current generating circuit 210. This may include controlling the startup time and stability of the current source.

[0245] In some embodiments, the RC filter module 2 realizes accurate filtering of current or voltage signals by configuring different capacitors and resistors and controlling the state of the switch tube, thereby ensuring the stability of the voltage in the circuit and reducing high-frequency interference.

[0246] In some embodiments, the bias current generating module 3 is responsible for obtaining signals from the RC filtering module 2 and the bias start control module 1 to generate the required bias current. Its function is to convert the filtered voltage signal into a stable bias current and supply it to other parts of the circuit.

[0247] According to the bias current generating circuit 210 of the embodiment of the present invention, a faster and more stable startup process is achieved by combining the bias startup control module 1 and the RC filter module 2. The bias startup control module 1 is connected to the first resistance unit 201 in the RC filter module 2 through the logic control unit 10 and the first switch tube 20, and the resistance unit is short-circuited when the circuit is started, thereby greatly reducing the time constant of the first RC filter structure 21. In this way, the filter capacitor in the RC filter module 2 can be charged to the required voltage more quickly, thereby accelerating the establishment process of the power supply voltage. This directly shortens the startup time of the bias current generating circuit 210, so that the bias current can reach a stable state more quickly, thereby improving the startup efficiency of the overall circuit.

[0248] like Figure 1 As shown, the bias current generating module 3 includes: a filtering unit 31 , a bias current generating unit 32 , a low voltage cascode current mirror 33 and a bias voltage providing unit 34 .

[0249] In some embodiments, the input end of the filter unit 31 is connected to a reference voltage source to filter the reference voltage. Specifically, the filter unit 31 receives an input voltage from the reference voltage source and eliminates high-frequency noise or voltage fluctuations through an RC filter circuit 93. The filtered stable voltage is sent to the bias current generating unit 32.

[0250] In some embodiments, the input end of the bias current generating unit 32 is connected to the output end of the filtering unit 31, and is used to generate a bias current according to the reference voltage after filtering. Specifically, the bias current generating unit 32 can adopt a current source structure to convert the reference voltage into a corresponding bias current to provide a bias for subsequent circuits.

[0251] In some embodiments, the first end of the low-voltage cascode current mirror 33 is connected to the output end of the bias current generating unit 32 for mirroring the bias current. Specifically, the low-voltage cascode current mirror 33 uses the current mirroring principle of MOSFET to control the source and gate voltages so that the current at the output end is equal to the current at the input end. In other words, the low-voltage cascode current mirror 33 can copy and distribute the bias current between different circuit nodes, thereby ensuring that all parts that need the bias current can obtain consistent current input.

[0252] In some embodiments, a first end of the bias voltage providing unit 34 is connected to a second end of the low-voltage common-source common-gate current mirror 33 and a drain of the first switch tube 20 in the bias start control module 1; a second end of the bias voltage providing unit 34 is a bias voltage end of the bias current generating circuit 210; the bias voltage end is connected to a first end of the first resistor unit 201 in the RC filter module 2 and a drain of the first switch tube 20; a third end of the bias voltage providing unit 34 is connected to a negative voltage source for providing a bias voltage.

[0253] Specifically, the filtering unit 31 filters the voltage provided by the reference voltage source to ensure its stability. The bias current generating unit 32 receives the filtered voltage and generates a stable bias current. The low-voltage common-source common-gate current mirror 33 mirrors the bias current, copies it and amplifies it into multiple current sources. The bias voltage providing unit 34 receives the mirrored current, generates a stable bias voltage, and outputs it to the bias voltage terminal of the circuit, and provides it to the RC filtering module 2 and other circuit units. Therefore, this bias voltage is an important output of the entire bias current generating circuit 210, which is used to drive other parts in the circuit.

[0254] like Figure 1 As shown, the filter unit 31 includes: a sixth resistor 311 and a third capacitor unit 312. The first end of the sixth resistor 311 is connected to the reference voltage source. The sixth resistor 311 is used to receive and limit the current transmitted from the reference voltage source. It acts as a current limiter in the filter unit 31 to help maintain voltage stability.

[0255] In some embodiments, the first end of the third capacitor unit 312 is connected to the second end of the sixth resistor 311, the second end of the third capacitor unit 312 is connected to the negative voltage source, and a sixth node is provided between the first end of the third capacitor unit 312 and the second end of the sixth resistor 311 to output a filtered reference voltage. The third capacitor unit 312 is used to filter the voltage passing through the sixth resistor 311, eliminate high-frequency noise and voltage fluctuations, and thus output a stable filtered reference voltage.

[0256] like Figure 1 As shown, the third capacitor unit 312 includes: a fourth capacitor 3121 and a twenty-third switch tube 3122. Among them, the first end of the fourth capacitor 3121 is connected to the second end of the sixth resistor 311 and the sixth node, and the second end of the fourth capacitor 3121 is connected to the negative voltage source. The existence of the fourth capacitor 3121 helps to smooth the voltage signal and further reduce noise and voltage fluctuations. Its capacitance value and the resistance value of the sixth resistor 311 together determine the cutoff frequency of the RC filter structure, thereby affecting the filtering effect.

[0257] In some embodiments, the gate of the twenty-third switch tube 3122 is connected to the first end and the sixth node of the fourth capacitor 3121, and the source and drain of the twenty-third switch tube 3122 are both connected to the negative voltage source. The twenty-third switch tube 3122 is used to adjust the connection state between the fourth capacitor 3121 and the negative voltage source, thereby affecting the charging and discharging process of the fourth capacitor 3121. Its switching state can affect the filtering effect and voltage stability of the fourth capacitor 3121.

[0258] In some embodiments, the bias current generating unit 32 includes: a twenty-fourth switch tube 321, a seventh resistor 322 and an eighth resistor 323. Among them, the twenty-fourth switch tube 321 can be a source follower. In an embodiment, the source follower is also called a common source follower, which is a MOSFET configuration for providing current driving capability without significantly changing the voltage. Its main function is to follow the voltage of the input signal to the output terminal, and has a higher input impedance and a lower output impedance.

[0259] In some embodiments, the gate of the twenty-fourth switch tube 321 is connected to the sixth node, and the drain of the twenty-fourth switch tube 321 is connected to the output end of the low-voltage common-source common-gate current mirror 33 to provide current driving capability.

[0260] In some embodiments, the first end of the seventh resistor 322 is connected to the source of the twenty-fourth switch tube 321, the second end of the seventh resistor 322 is connected to the first end of the eighth resistor 323, and the second end of the eighth resistor 323 is connected to the negative voltage source to generate a bias current. Specifically, the seventh resistor 322 and the eighth resistor 323 can form a current voltage divider network. Through the configuration of these two resistors and their resistance values, the current can generate a voltage divider in the resistor, thereby generating a stable current between the seventh resistor 322 and the eighth resistor 323, which is the bias current.

[0261] In some embodiments, the power supply terminal of the low-voltage cascode current mirror 33 is connected to the output terminal of the voltage regulator circuit 211 of the on-chip power supply system 2000 where the bias current generating circuit 210 is located, so as to use the voltage regulator signal output by the voltage regulator circuit 211 as the power supply voltage. The voltage regulator circuit 211 is biased by the bias current output by the bias current generating circuit 210, forming a self-biased structure. This self-biased structure reduces the dependence on the external power supply voltage VDD and improves the power supply ripple suppression capability. In addition, the use of the low-voltage cascode current mirror 33 further enhances the low-frequency power supply ripple rejection ratio (PSR, Power Supply Rejection), thereby improving the overall stability and performance of the system.

[0262] In some embodiments, the power supply end of the low voltage common source and common gate current mirror 33 is connected to the output end of the voltage stabilizing circuit 211 through the filter circuit 93. The filter circuit 93 may include a bidirectional filter module, which is a filter circuit 93 that can simultaneously process the positive and negative noise of the power supply signal. It can be composed of multiple filter components, such as resistors and capacitors, through different filter networks (such as RC networks) to achieve bidirectional filtering of the power supply signal. In addition, in some applications, the power supply signal may be interfered by an external power supply or other circuits, and the bidirectional filter module can simultaneously process these interferences.

[0263] like Figure 1 As shown, the bias current generating circuit 210 also includes a fifth capacitor 4, a first end of the fifth capacitor 4 is connected to the output end of the voltage stabilizing circuit 211 and the filter circuit 93, and a second end of the fifth capacitor 4 is connected to the negative voltage source. The fifth capacitor 4 is mainly used for further filtering, thereby reducing noise and ripple in the power supply. It can work together with the previous filter circuit 93 (such as a bidirectional filter module) to ensure the stability of the power supply voltage.

[0264] For example Figure 1 As shown, the bias voltage providing unit 34 includes: a twenty-fifth switch tube 341. Among them, the twenty-fifth switch tube 341 can be an n-type MOSFET, the drain of the twenty-fifth switch tube 341 is connected to the second end of the low-voltage common source and common gate current mirror 33 and the drain of the first switch tube 20 in the bias startup control module 1, the gate of the twenty-fifth switch tube 341 is connected to the drain of the twenty-fifth switch tube 341, the drain of the first switch tube 20, and the drain of the sixteenth switch tube 2011 in the first resistor unit 201, and the source of the twenty-fifth switch tube 341 is connected to the negative voltage source. The twenty-fifth switch tube 341 can adjust and stabilize the output bias voltage according to the working state of the circuit, thereby ensuring that the bias current generating circuit 210 provides a stable bias current. The stable bias current can be used to drive the voltage stabilizing circuit 211 to ensure that the voltage output by the voltage stabilizing circuit 211 is stable.

[0265] In some embodiments, the bias current generating circuit 210 further includes: at least one bias current output switch tube 5. The at least one bias current output switch tube 5 may be one bias current output switch tube 5, two bias current output switch tubes 5, five bias current output switch tubes 5, ten bias current output switch tubes 5 or more bias current output switch tubes 5. The specific number may be flexibly set according to the requirements of the specific circuit design (such as the number of bias current demand modules), and is not specifically limited here.

[0266] In some embodiments, the gate of each bias current output switch tube 5 is connected to the output end of the RC filter module 2, the source of each bias current output switch tube 5 is connected to the negative voltage source, and the drain of each bias circuit output switch tube is suitable for connecting to the corresponding bias current demand module.

[0267] Among them, the main function of the bias current output switch tube 5 is to distribute the bias current between different bias current demand modules according to the control signal output by the RC filter module 2. Through the switching operation of the switch tube, the bias current can be selectively provided to a specific module, or the connection with certain modules can be disconnected. By connecting to the output end of the RC filter module 2, the bias current output switch tube 5 can respond to the filtered signal and provide a stable and noise-free current output, avoiding the interference of high-frequency noise in the signal on the bias current, thereby improving the stability and reliability of the entire circuit. In addition, in the case of multi-module requirements, through the combination of multiple bias current output switch tubes 5, the system can dynamically adjust the distribution of bias current according to demand. This flexibility is very important for complex analog circuits.

[0268] In some embodiments, the bias current demanding module may be a circuit part that requires a stable bias current for normal operation, such as an amplifier, an oscillator, or other analog circuit module. The bias current is delivered to these modules through the drain to ensure that they can operate stably.

[0269] In general, the reference voltage source is filtered by the filter unit 31 composed of the sixth resistor 311, the fourth capacitor 3121 and the twenty-third switch tube 3122. The filtered voltage signal enters the source follower twenty-fourth switch tube 321, and the source follower provides the required current driving capability, so that a stable bias current is generated on the seventh resistor 322 and the eighth resistor 323. These bias currents are then copied through the low-voltage common source and common gate current mirror 33 and output to the twenty-fifth switch tube 341. The twenty-fifth switch tube 341 is responsible for providing the bias voltage and further filtering the noise through the subsequent RC filter module 2. The signal after filtering is finally passed through at least one bias current output switch tube 5 to provide an accurate bias current to the corresponding bias current demand module.

[0270] Since this circuit part uses the voltage-stabilized signal output by the voltage-stabilizing circuit 211 as the power supply voltage, a self-biased loop is formed with the voltage-stabilizing circuit 211, thereby greatly reducing the correlation with the external power supply voltage. This design significantly improves the power supply ripple suppression capability (PSR). In addition, the substrate of the p-type MOSFET used in this part of the circuit and the gate of the sixteenth switch tube 2011 are biased using the filtered voltage-stabilized signal, which further reduces the influence of power supply noise on the signal and improves the overall stability and anti-interference capability of the circuit.

[0271] The fifth aspect of the present invention also provides a voltage stabilizing circuit, such as Figure 1 As shown, the voltage stabilizing circuit 211 includes: a voltage stabilizing module 6 and the RC filtering module 2 described in the above embodiment.

[0272] The main function of the voltage stabilizing module 6 is to adjust the input voltage to a stable output voltage, which can suppress the fluctuation of the input power supply voltage and ensure the output voltage is constant, thereby providing a reliable power supply voltage for subsequent circuits or devices.

[0273] In some embodiments, the RC filter module 2 includes a second RC filter structure 23 and a twentieth switch tube 24. The second RC filter structure 23 is used to filter out high-frequency noise and transient interference in the voltage. The twentieth switch tube 24 is used to conduct when the switch signal output by the logic control unit 10 corresponds to turning on the fast start function, so as to short-circuit the second resistance unit 231.

[0274] According to the voltage stabilizing circuit 211 of the embodiment of the present invention, the voltage stabilizing module 6 is connected to the RC filter module 2, which effectively suppresses the noise in the voltage stabilizing circuit 211 while accelerating the startup process of the voltage stabilizing circuit 211. Specifically, during the startup process of the voltage stabilizing circuit 211, the switch signal output by the logic control unit 10 turns on the twentieth switch tube 24 to short-circuit the second resistance unit 231 in the second RC filter structure 23. Since the time constant of the second RC filter structure 23 is proportional to the product of the resistance and the capacitance, the time constant is significantly reduced after the resistance unit is short-circuited. This measure to reduce the time constant accelerates the charging process of the filter capacitor, so that the voltage stabilizing circuit 211 can establish the required output voltage more quickly, thereby effectively shortening the startup time of the voltage stabilizing circuit 211 and improving the response speed and startup efficiency of the overall circuit.

[0275] In some embodiments, the voltage stabilization module 6 includes: a first-stage operational amplifier structure and a second-stage operational amplifier structure. Among them, the first-stage operational amplifier structure can be a symmetrical OTA (Operational Transconductance Amplifier) ​​circuit. The OTA circuit is an amplifier that converts an input differential voltage signal into an output current, and its gain is called transconductance (Gm). It is a voltage-controlled current source used between a sensor / signal source and an analog-to-digital converter for converting voltage signals to current signals. Compared with other structures, the OTA circuit has better symmetry and matching, provides better offset and CMRR (Common-Mode Rejection Ratio, common mode rejection ratio) characteristics, and can provide good PSR (power supply ripple rejection ratio) even in the case of low amplifier gain.

[0276] In some embodiments, the power supply terminal of the first-stage operational amplifier structure is suitable for inputting a bias current to supply power, and the input terminal of the first-stage operational amplifier structure is connected to the fifth node in the RC filter module 2 to input the filtered bandgap reference voltage, which is used to generate an operational amplifier signal according to the bandgap reference voltage. The bandgap reference voltage is a relatively stable voltage source that is not affected by temperature changes and is used to provide a high-precision reference voltage. The operational amplifier signal is the output after amplifying and processing the input bandgap reference voltage, and is ready to be passed to the next stage circuit for further processing.

[0277] In some embodiments, the input end of the second stage op amp structure is connected to the output end of the first stage op amp structure to generate a voltage stabilization signal according to the op amp signal. The voltage stabilization signal is a stable voltage after two stages of amplification and processing, and can be used to provide a stable operating voltage for other circuits on the chip.

[0278] In some embodiments, the output end of the second-stage operational amplifier structure is connected to the bias current generating circuit 210 that generates the bias current, so that the voltage stabilization signal is used as the power supply voltage of the bias current generating circuit 210. Through this connection mode, the bias current generating circuit 210 can use the voltage stabilization signal to generate the required bias current. By using the voltage stabilization signal as the power supply voltage of the bias current generating circuit 210, a self-biasing structure is formed. This self-biasing structure can improve the overall stability and reliability of the system, because the output signal of the voltage stabilization circuit 211 directly affects the generation of the bias current, thereby forming a closed-loop feedback and reducing the impact of external power supply fluctuations.

[0279] In addition, since the power supply voltage of the bias current generating circuit 210 is provided by a stable regulated voltage signal, the influence of power supply ripple and noise on circuit performance can be significantly reduced. This design improves the stability of the current generating circuit and helps to improve the performance of the entire circuit.

[0280] In some embodiments, the first-stage operational amplifier structure includes: a power supply unit 611 and an operational amplifier unit 612. The first end of the power supply unit 611 is suitable for inputting a bias current, and is used to generate an operational amplifier power supply current according to the bias current. Therefore, the main function of the power supply unit 611 is to generate an operational amplifier power supply current according to the input bias current, and provide the necessary current supply for the first-stage operational amplifier structure. It ensures that the first-stage operational amplifier structure has enough current to operate stably, thereby generating a reliable operational amplifier signal.

[0281] In some embodiments, the power supply end of the operational amplifier unit 612 is connected to the power supply unit 611, and the input end of the operational amplifier unit 612 is connected to the RC filter module 2, which is used to generate an operational amplifier signal according to the bandgap reference voltage. The function of the operational amplifier unit 612 is to amplify the filtered bandgap reference voltage to provide a stable operational amplifier signal, which is used for subsequent voltage stabilization signal generation.

[0282] In some embodiments, the power supply unit 611 includes: a current mirror unit 6111 and a current source subunit 6112. The input end of the current mirror unit 6111 is suitable for inputting a bias current for mirroring the bias current. Therefore, the main function of the current mirror unit 6111 is to mirror the input bias current to provide a stable current source. The current mirror unit 6111 can copy the input current and output an identical current to supply power to other circuit parts.

[0283] In some embodiments, the current mirror unit 6111 may include two or more switch tubes, one of which (reference switch tube) receives a bias current, and the other switch tube (mirror switch tube) outputs the same current according to the working state of the reference switch tube. This configuration can mirror the current to the output end to achieve stable current transmission.

[0284] In some embodiments, a first end of the current source subunit 6112 is connected to the output end of the current mirror unit 6111, and a second end of the current source subunit 6112 is connected to the power supply end of the operational amplifier unit 612. The current source subunit 6112 is used to provide the mirror current obtained from the output end of the current mirror unit 6111 to the power supply end of the operational amplifier unit 612. Its function is to convert the mirror current into a stable power supply current to provide the required current source for the operational amplifier unit 612.

[0285] like Figure 1 As shown, the current mirror unit 6111 includes: a twenty-sixth switch tube 6113 and a twenty-seventh switch tube 6114. The twenty-sixth switch tube 6113 and the twenty-seventh switch tube 6114 can be n-type MOSFETs, the gate of the twenty-sixth switch tube 6113 is suitable for inputting bias current, and the source of the twenty-sixth switch tube 6113 is connected to the negative voltage source. The gate of the twenty-seventh switch tube 6114 is suitable for inputting bias current, the source of the twenty-seventh switch tube 6114 is connected to the drain of the twenty-sixth switch tube 6113, and the drain of the twenty-seventh switch tube 6114 is connected to the first end of the current source subunit 6112.

[0286] Specifically, when the gate voltages of the twenty-sixth switch tube 6113 and the twenty-seventh switch tube 6114 are the same, the two switch tubes are in the same conduction state, which can ensure the accurate mirroring of the current between the two switch tubes. The twenty-sixth switch tube 6113 receives the bias current, and the twenty-seventh switch tube 6114 is connected to the drain of the twenty-sixth switch tube 6113 through the source, ensuring that the current transmitted from the twenty-sixth switch tube 6113 to the twenty-seventh switch tube 6114 is equal. The mirrored current is transmitted to the current source subunit 6112 through the drain of the twenty-seventh switch tube 6114, providing a stable current source for the voltage stabilization circuit 211.

[0287] like Figure 1 As shown, the current source subunit 6112 includes: a twenty-eighth switch tube 6115 , a twenty-ninth switch tube 6116 , a thirtieth switch tube 6117 and a thirty-first switch tube 6118 .

[0288] In some embodiments, the twenty-eighth switch tube 6115 and the twenty-ninth switch tube 6116 can be p-type MOSFETs, the source of the twenty-eighth switch tube 6115 is connected to the drain of the twenty-seventh switch tube 6114 and the gate of the twenty-eighth switch tube 6115, the gate of the twenty-eighth switch tube 6115 is connected to the gate of the twenty-ninth switch tube 6116 to provide bias for the twenty-ninth switch tube 6116, and the source of the twenty-ninth switch tube 6116 is connected to the power supply terminal of the operational amplifier unit 612.

[0289] In some embodiments, the 30th switch tube 6117 and the 31st switch tube 6118 can be p-type MOSFETs, the source of the 30th switch tube 6117 is connected to the drain of the 28th switch tube 6115 and the gate of the 30th switch tube 6117, the drain of the 30th switch tube 6117 is connected to a positive voltage source, the gate of the 30th switch tube 6117 is connected to the gate of the 31st switch tube 6118 to provide bias for the 31st switch tube 6118, the source of the 31st switch tube 6118 is connected to the drain of the 29th switch tube 6116, and the drain of the 31st switch tube 6118 is connected to a positive voltage source.

[0290] The twenty-eighth switch tube 6115, the twenty-ninth switch tube 6116, the thirtieth switch tube 6117 and the thirty-first switch tube 6118 together form a common-source common-gate current mirror, which effectively provides a stable current supply to meet the normal working requirements of the operational amplifier unit 612. This design improves the stability and accuracy of the current supply, thereby enhancing the overall performance of the voltage stabilization circuit 211.

[0291] like Figure 1 As shown, the operational amplifier unit 612 includes a thirty-second switch tube 6121 , a thirty-third switch tube 6122 , a thirty-fourth switch tube 6123 and a thirty-fifth switch tube 6124 .

[0292] In some embodiments, the thirty-second switch tube 6121 and the thirty-third switch tube 6122 can be p-type MOSFETs, the thirty-second switch tube 6121 and the thirty-third switch tube 6122 are a pair of input differential pairs, the input end of the thirty-second switch tube 6121 is connected to the bandgap reference voltage after RC filtering, and the input end of the thirty-third switch tube 6122 is connected to the negative feedback resistor network to form a negative feedback loop.

[0293] In some embodiments, the gate of the thirty-second switch tube 6121 is connected to the fifth node of the RC filter module 2, the drain of the thirty-second switch tube 6121 is connected to the drain of the thirty-third switch tube 6122, and there is a seventh node between the drain of the thirty-third switch tube 6122 and the drain of the thirty-second switch tube 6121 to serve as the power supply end of the operational amplifier unit 612, and the power supply end is connected to the source of the twenty-ninth switch tube 6116, and the thirty-second switch tube and the thirty-third switch tube 6122 are used to generate a differential signal.

[0294] The thirty-second switch tube 6121 and the thirty-third switch tube 6122 output signals in a differential form. This configuration can effectively suppress common mode noise and increase signal stability and accuracy. In an op amp circuit, differential signal is a basic signal processing method that can provide higher gain and better linearity.

[0295] In some embodiments, the thirty-fourth switch tube 6123 and the thirty-fifth switch tube 6124 can be n-type MOSFETs, and the thirty-fourth switch tube 6123 and the thirty-fifth switch tube 6124 are completely symmetrical current mirror structures, providing a high current factor, thereby improving the gain of the operational amplifier unit 612. Specifically, when the thirty-fourth switch tube 6123 and the thirty-fifth switch tube 6124 are completely symmetrical in the circuit, their operating conditions and current mirror effects can be highly consistent. This symmetrical configuration can achieve precise current control and high-gain amplification effects. In a symmetrical current mirror structure, the current factor refers to the amplification factor of the current transmitted through the mirror relative to the source current. Due to the symmetrical configuration of the switch tube, the current factor can be designed to be very high, thereby improving the gain.

[0296] In some embodiments, the drain of the thirty-fourth switch tube 6123 is connected to the gate of the thirty-fourth switch tube 6123 and the source of the thirty-second switch tube 6121, the source of the thirty-fourth switch tube 6123 is connected to a negative voltage source, the drain of the thirty-fifth switch tube 6124 is connected to the source of the thirty-third switch tube 6122 and the gate of the thirty-fifth switch tube 6124, and the source of the thirty-fifth switch tube 6124 is connected to a negative voltage source, for converting the differential signal into an output current.

[0297] like Figure 1As shown, the operational amplifier unit 612 also includes: a ninth resistor 6125 and a tenth resistor 6126. Among them, the first end of the ninth resistor 6125 is connected to the output end of the second-stage operational amplifier structure, the second end of the ninth resistor 6125 is connected to the first end of the tenth resistor 6126, and the second end of the tenth resistor 6126 is connected to the negative voltage source. In this way, the ninth resistor 6125 and the tenth resistor 6126 are configured in series to form a resistor voltage divider network. There is an eighth node between the second end of the ninth resistor 6125 and the first end of the tenth resistor 6126, and the voltage of the eighth node is the voltage value after the two resistors are divided. The eighth node is connected to the gate of the thirty-third switch tube 6122 to form a negative feedback loop.

[0298] In some embodiments, the function of the negative feedback loop is to adjust the output of the operational amplifier through the feedback signal, reduce possible gain fluctuations, and make the circuit more stable. Negative feedback can reduce errors caused by circuit nonlinearity and parameter changes, and improve the accuracy of the voltage stabilization circuit 211. Through negative feedback, the nonlinear effect between the output signal and the input signal can be effectively controlled to maintain the linear amplification characteristics of the signal.

[0299] like Figure 1 As shown, the operational amplifier unit 612 further includes: a thirty-sixth switch tube 6127 and a thirty-seventh switch tube 6128. The thirty-sixth switch tube 6127 and the thirty-seventh switch tube 6128 can be n-type MOSFETs, and the thirty-sixth switch tube 6127 and the thirty-seventh switch tube 6128 can also be a completely symmetrical current mirror structure, providing a high current factor, thereby improving the gain of the operational amplifier unit 612.

[0300] In some embodiments, the gate of the thirty-sixth switch tube 6127 is connected to the gate of the thirty-fourth switch tube 6123 and the drain of the thirty-fourth switch tube 6123, and the source of the thirty-sixth switch tube 6127 is connected to the negative voltage source to increase the output impedance. High output impedance helps to reduce the impact of output current changes on the output voltage, thereby enhancing the stability and accuracy of the voltage stabilization circuit 211.

[0301] In some embodiments, the gate of the thirty-seventh switch tube 6128 is connected to the gate of the thirty-fifth switch tube 6124 and the drain of the thirty-fifth switch tube 6124, the source of the thirty-seventh switch tube 6128 is connected to the negative voltage source, and the drain of the thirty-seventh switch tube 6128 is connected to the output end of the second-stage operational amplifier structure through the sixth capacitor to increase the output impedance, and the sixth capacitor serves as a compensation capacitor.

[0302] In some embodiments, the sixth capacitor is used as a compensation capacitor to improve the frequency response and stability of the circuit. Specifically, the compensation capacitor can effectively control the gain bandwidth of the operational amplifier and reduce the stability problem caused by high-frequency noise. By improving the frequency response, the sixth capacitor enhances the stability of the voltage stabilization circuit 211 in the high frequency band, so that the operational amplifier unit 612 can better process dynamic signals.

[0303] In some embodiments, the capacity of the sixth capacitor should be determined according to the operating frequency range and target gain of the operational amplifier unit 612. Selecting an appropriate capacitance value can improve the phase margin of the system and prevent oscillation or instability under high frequency conditions. The selection of the capacitance value may also need to be adjusted through experiments to achieve optimal performance.

[0304] like Figure 1 As shown, the operational amplifier unit 612 further includes: a thirty-eighth switch tube 6129 and a thirty-ninth switch tube 6120. The thirty-eighth switch tube 6129 and the thirty-ninth switch tube 6120 may be n-type MOSFETs, the gate of the thirty-eighth switch tube 6129 is connected to the gate of the thirty-ninth switch tube 6120, the source of the thirty-eighth switch tube 6129 is connected to the drain of the thirty-sixth switch tube 6127, the gate of the thirty-eighth switch tube 6129 and the gate of the thirty-ninth switch tube 6120 are also input with a bias voltage, and the source of the thirty-ninth switch tube 6120 is connected to the drain of the thirty-seventh switch tube 6128, so as to increase the output gain to obtain an operational amplifier signal.

[0305] In some embodiments, the thirty-eighth switch tube 6129 and the thirty-ninth switch tube 6120 can form a cascode current mirror. In the cascode configuration, the thirty-eighth switch tube 6129 and the thirty-ninth switch tube 6120 have a current mirroring effect on each other, so that the input current can generate a larger output current on the thirty-ninth switch tube 6120. This current mirroring method improves the gain of the circuit because the change of the input signal can generate an amplified output signal on the thirty-ninth switch tube 6120.

[0306] Furthermore, the thirty-eighth switch tube 6129 and the thirty-ninth switch tube 6120 control the source current by adjusting their gate voltages, thereby improving the gain of the operational amplifier unit 612. By precisely controlling the gate voltage, the gain can be optimized, making the operational amplifier unit 612 more effective in amplifying the input signal. The common source and common gate configuration of the thirty-eighth switch tube 6129 and the thirty-ninth switch tube 6120 also helps to improve the output impedance of the circuit. This high output impedance characteristic can enhance the circuit's amplification effect on the signal and improve the overall performance of the operational amplifier unit 612.

[0307] In some embodiments, the second-stage operational amplifier structure includes: an output conversion unit 621 and an output unit 622. The first end of the output conversion unit 621 is connected to the drain of the thirty-eighth switch tube 6129 and the drain of the thirty-ninth switch tube 6120, and is used to convert the output signal of the thirty-eighth switch tube 6129 and the output signal of the thirty-ninth switch tube 6120 into an operational amplifier signal output. This can be achieved by current source, current mirror or operational amplifier structure, etc., to achieve signal synthesis and conversion.

[0308] In some embodiments, the input end of the output unit 622 is connected to the output end of the output conversion unit 621, and the output end of the output unit 622 is connected to the bias current generating circuit 210 that generates the bias current to output a voltage stabilization signal. Specifically, the output unit 622 further processes the signal of the output conversion unit 621, and outputs the processed signal as a voltage stabilization signal to the bias current generating circuit 210. This process may include buffering, amplification, or further processing of the signal to ensure the accuracy and stability of the voltage stabilization signal.

[0309] In some embodiments, Figure 1 As shown, the output conversion unit 621 includes: a 40th switch tube 6210 and a 41st switch tube 6211. The 40th switch tube 6210 and the 41st switch tube 6211 can be p-type MOSFETs, the source of the 40th switch tube 6210 is connected to the drain of the 38th switch tube 6129 and the gate of the 40th switch tube 6210, the gate of the 40th switch tube 6210 is connected to the gate of the 41st switch tube 6211, the drain of the 40th switch tube 6210 is connected to a positive voltage source, the drain of the 41st switch tube 6211 is connected to a positive voltage source, and the source of the 41st switch tube 6211 is connected to the drain of the 39th switch tube 6120 and the input end of the output unit 622.

[0310] In some embodiments, the 40th switch tube 6210 and the 41st switch tube 6211 form a current mirror structure, which can convert the output signal of the 38th switch tube 6129 and the output signal of the 39th switch tube 6120 into an op amp signal output, thereby realizing single-ended output of the signal.

[0311] like Figure 1 As shown, the output unit 622 includes: a 42nd switch tube 6221. Among them, the 42nd switch tube 6221 can be a power tube, which is a transistor that can handle large currents and large voltages and is used in circuits that require high output power. Compared with ordinary signal transistors, power tubes have a larger area and lower on-resistance, so they can withstand higher currents and voltages. Therefore, the 42nd switch tube 6221 can provide a greater current load capacity.

[0312] In some embodiments, the gate of the forty-second switch tube 6221 is connected to the source of the forty-first switch tube 6211 and the drain of the thirty-ninth switch tube 6120, the drain of the forty-second switch tube 6221 is connected to the positive voltage source, the source of the forty-second switch tube 6221 is connected to the first end of the ninth resistor 6125, and there is a ninth node between the source of the forty-second switch tube 6221 and the first end of the ninth resistor 6125 to output a regulated voltage signal.

[0313] In some embodiments, the voltage stabilizing circuit 211 further includes: a compensation module 7. The first end of the compensation module 7 is connected to a positive voltage source, and the second end of the compensation module 7 is connected to the gate of the 42nd switch tube 6221, the source of the 41st switch tube 6211, and the drain of the 39th switch tube 6120, for zero point compensation. Zero point compensation is to introduce a zero point in the frequency response by adjusting the transfer function of the circuit to improve the phase margin of the system, thereby enhancing the stability of the circuit. Zero point compensation is usually used to improve the dynamic response of the circuit.

[0314] like Figure 1 As shown, the compensation module 7 includes: an eleventh resistor 71 and a seventh capacitor 72, wherein the first end of the eleventh resistor 71 is connected to the positive voltage source, the second end of the eleventh resistor 71 is connected to the first end of the seventh capacitor 72, and the second end of the seventh capacitor 72 is connected to the gate of the forty-second switch tube 6221, the source of the forty-first switch tube 6211, and the drain of the thirty-ninth switch tube 6120.

[0315] In some embodiments, the eleventh resistor 71 is used in the compensation module 7 to adjust the zero or pole position of the circuit, affecting the frequency response of the circuit. In this design, the eleventh resistor 71 is connected in series with the seventh capacitor 72 to form an RC network, which can adjust the high-frequency characteristics of the circuit, thereby improving the stability and phase margin of the voltage stabilization circuit 211.

[0316] In some embodiments, the seventh capacitor 72 is mainly used for high frequency compensation. The function of the seventh capacitor 72 is to introduce a zero point in the circuit or adjust an existing pole to offset the decrease of high frequency gain and improve the dynamic response performance and stability of the circuit.

[0317] The sixth aspect of the present invention also provides a starting circuit, such as Figure 1 As shown, the startup circuit 212 includes: a first power supply module 81, a second power supply module 82 and a current mirror module.

[0318] Among them, the first power supply module 81 is used to provide a first bias current in response to the fourth external control signal flipping from a low potential to a high potential. That is, when the fourth external control signal flips from a low potential to a high potential, the first power supply module 81 is triggered and starts to provide the first bias current. This process ensures that the voltage stabilizing circuit 211 has obtained sufficient bias current before the circuit is fully started, thereby improving the success rate of startup. In other words, the first power supply module 81 is mainly responsible for providing the required bias current in the initial stage of system startup to ensure the normal operation of the voltage stabilizing circuit 211.

[0319] In some embodiments, Figure 7 As shown, the fourth external control signal (PDB) is logically opposite to the power switch signal of the on-chip power supply system 2000 where the startup circuit 212 is located. For example, when the power switch signal is at a low level, the fourth external control signal is at a high potential.

[0320] In some embodiments, the input end of the second power supply module 82 is connected to the bias voltage end of the bias current generating circuit 210 described in the above embodiment and the output end of the voltage stabilizing circuit 211 described in the above embodiment, and is used to control the first power supply module 81 to shut down and provide the second bias current when the bias voltage at the bias voltage end reaches the voltage threshold and the voltage stabilizing signal output by the voltage stabilizing circuit 211 reaches the voltage stabilizing threshold. The second power supply module 82 takes over the power supply after the system reaches a stable state, shuts down the first power supply module 81, and provides a more accurate and stable bias current, ensuring that the voltage stabilizing circuit 211 maintains a stable output during normal operation.

[0321] In some embodiments, the current mirror module is connected to the first power supply module 81 and the second power supply module 82 respectively, and is used to mirror the first bias current or the second bias current to the output end of the voltage regulator circuit 211. Through the current mirror module, the startup circuit 212 can effectively transmit the bias current to the voltage regulator circuit 211, thereby maintaining a stable output voltage. This design ensures that the output of the startup circuit 212 can match different working states, especially the switch between the initial startup and normal operation stages.

[0322] According to the startup circuit 212 of the embodiment of the present invention, by setting the first power supply module 81, the second power supply module 82 and the current mirror module, the efficient power supply switching and stable output of the startup circuit 212 are realized. Specifically, when the fourth external control signal is flipped from a low potential to a high potential, the first power supply module 81 responds to the change of the fourth external control signal and provides an initial first bias current to quickly start the bias current generating circuit 210 and the voltage stabilizing circuit 211. In this process, the voltage at the bias voltage end gradually increases, and the output voltage of the voltage stabilizing circuit 211 is gradually established. When the bias voltage reaches the set voltage threshold and the output signal of the voltage stabilizing circuit 211 reaches the voltage stabilizing threshold, the second power supply module 82 can take over the current supply, turn off the first power supply module 81, and provide a stable second bias current. In the whole process, the current mirror module mirrors the first bias current or the second bias current to the output end of the voltage stabilizing circuit 211 to ensure that the voltage stabilizing circuit 211 can work stably during the whole startup process. Through such a power supply switching mechanism, the startup circuit 212 of the present invention not only realizes rapid startup, but also ensures that the system can quickly enter a stable operating state after startup, thereby improving the response speed and stability of the power supply system.

[0323] like Figure 1 As shown, the first power supply module 81 includes: a 43rd switch tube 810 and a series inverse ratio tube structure 820. The 43rd switch tube 810 can be a p-type MOSFET, the drain of the 43rd switch tube 810 is connected to the positive voltage source, and the source of the 43rd switch tube 810 is connected to the current mirror module. The 43rd switch tube 810 serves as a switching element of the first power supply module 81. When it is turned on, the positive voltage source provides current to the current mirror module through the 43rd switch tube 810 to form a first bias current.

[0324] In some embodiments, the first end of the series inverse ratio transistor structure 820 is connected to the gate of the forty-third switch transistor 810, the second end of the series inverse ratio transistor structure 820 is connected to the negative voltage source, and the control end of the series inverse ratio transistor structure 820 is suitable for inputting a fourth external control signal. When the fourth external control signal flips from a low potential to a high potential, the series inverse ratio transistor structure 820 is turned on and the forty-third switch transistor 810 is turned on to provide a first bias current.

[0325] Specifically, the series inverted ratio transistor structure 820 can be used to control the conduction state of the forty-third switch tube 810. When the fourth external control signal is flipped from a low potential to a high potential, the series inverted ratio transistor structure 820 is turned on, the gate voltage of the forty-third switch tube 810 is pulled down, so that the forty-third switch tube 810 is also turned on, and the source voltage of the forty-third switch tube 810 is pulled up, so that the source of the forty-third switch tube 810 is connected to the current mirror module. At this time, the current can flow from the positive voltage source through the forty-third switch tube 810 to the current mirror module, thereby providing the first bias current required by the voltage stabilization circuit 211.

[0326] like Figure 1 As shown, the series inverse ratio transistor structure 820 includes: a 44th switch tube 821, a 45th switch tube 822 and a 46th switch tube 823. Among them, the 44th switch tube 821, the 45th switch tube 822 and the 46th switch tube 823 can be n-type MOSFETs, the drain of the 44th switch tube 821 is connected to the gate of the 43rd switch tube 810, and the gate of the 44th switch tube 821 is connected to the fourth external control signal terminal. The conduction state of the 44th switch tube 821 is determined by the control signal on its gate, thereby affecting the switch state of the 43rd switch tube 810, and then controlling the provision of the first bias current of the startup circuit 212.

[0327] In some embodiments, the drain of the 45th switch tube 822 is connected to the source of the 44th switch tube 821, and the gate of the 45th switch tube 822 is connected to the fourth external control signal terminal. The gate of the 45th switch tube 822 also receives the fourth external control signal to determine its conduction state.

[0328] In some embodiments, the drain of the forty-sixth switch tube 823 is connected to the source of the forty-fifth switch tube 822, the gate of the forty-sixth switch tube 823 is connected to the fourth external control signal terminal, and the source of the forty-sixth switch tube 823 is connected to the negative voltage source. The gate of the forty-sixth switch tube 823 is also connected to the fourth external control signal terminal and is controlled by it.

[0329] Specifically, when the fourth external control signal is flipped from a low potential to a high potential, the three switch tubes in the series inverse ratio tube structure 820 are turned on step by step, so that the gate potential of the forty-third switch tube 810 is reduced, thereby turning on the forty-third switch tube 810. When the forty-third switch tube 810 is turned on, current can flow from the positive voltage source through the forty-third switch tube 810 into the current mirror module, providing the first bias current required by the voltage stabilization circuit 211.

[0330] like Figure 1As shown, the second power supply module 82 includes: a 47th switch tube 824 and a 48th switch tube 825. Among them, the 47th switch tube 824 and the 48th switch tube 825 can be n-type MOSFETs. The gate of the 47th switch tube 824 is connected to the bias voltage terminal of the bias current generating circuit 210, and the source of the 47th switch tube 824 is connected to the negative voltage source, which is used to turn on when the bias voltage at the bias voltage terminal reaches the voltage threshold. That is to say, when the bias voltage of the bias current generating circuit 210 reaches the set voltage threshold, the 47th switch tube 824 is turned on. After turning on, it allows negative voltage to pass through, thereby providing the necessary voltage conditions for the next 48th switch tube 825.

[0331] In some embodiments, the gate of the 48th switch tube 825 is connected to the output end of the voltage stabilizing circuit 211, the source of the 48th switch tube 825 is connected to the drain of the 47th switch tube 824, and the drain of the 48th switch tube 825 is connected to the current mirror module, which is used to be turned on when the voltage stabilizing signal output by the voltage stabilizing circuit 211 reaches the voltage stabilizing threshold. In other words, the function of the 48th switch tube 825 is to be turned on when the output signal of the voltage stabilizing circuit 211 reaches the voltage stabilizing threshold, thereby outputting the current of the second power supply module 82 to the current mirror module. This ensures that when the voltage reaches a stable state, the circuit can provide sufficient bias current.

[0332] In some embodiments, the current mirror module includes: a first current mirror unit 831, the first end of the first current mirror unit 831 is connected to the source of the forty-third switch tube 810, the second end of the first current mirror unit 831 is connected to the negative voltage source, and the third end of the first current mirror unit 831 is connected to the input end of the voltage stabilizing circuit 211 to mirror the first bias current to the voltage stabilizing circuit 211.

[0333] Specifically, the first end of the first current mirror unit 831 is connected to the source of the forty-third switch tube 810. When the forty-third switch tube 810 is turned on, current can flow from the positive voltage source through the first current mirror unit 831. This connection ensures that the first current mirror unit 831 can capture the bias current generated by the first power supply module 81. The second end of the first current mirror unit 831 is connected to the negative voltage source. This connection provides the necessary potential difference for the current mirror unit, so that the current can flow through the internal structure of the first current mirror unit 831 and be mirrored to other nodes. The third end of the first current mirror unit 831 is connected to the input end of the voltage stabilizing circuit 211. This means that the first bias current passing through the forty-third switch tube 810 is mirrored to the input end of the voltage stabilizing circuit 211, thereby providing the necessary bias current for the voltage stabilizing circuit 211.

[0334] In some embodiments, the current mirror module also includes: a second current mirror unit 832, a first end of the second current mirror unit 832 is connected to the drain of the forty-eighth switch tube 825, a second end of the second current mirror unit 832 is connected to the gate of the forty-third switch tube 810 and the first end of the series inverse ratio tube structure 820, so as to control the forty-third switch tube 810 to be turned off when the forty-eighth switch tube 825 is turned on, and a third end of the second current mirror unit 832 is connected to the first end of the first current mirror unit 831, so as to mirror the second bias current to the voltage stabilizing circuit 211.

[0335] Specifically, the first end of the second current mirror unit 832 is directly connected to the drain of the forty-eighth switch tube 825. When the forty-eighth switch tube 825 is turned on, the current flows through the first end of the second current mirror unit 832, which ensures that the second current mirror unit 832 can sense the bias current provided by the second power supply module 82. The second end of the second current mirror unit 832 is connected to the gate of the forty-third switch tube 810 and the first end of the series inverted ratio tube structure 820. This connection is crucial because it determines the on or off state of the forty-third switch tube 810. When the second current mirror unit 832 is turned on, it can pull up the gate potential of the forty-third switch tube 810 to make it close to the positive voltage source (the positive voltage source is higher than the source potential), causing the forty-third switch tube 810 to be turned off, thereby cutting off the bias current of the first power supply module 81.

[0336] Furthermore, the third end of the second current mirror unit 832 is connected to the first end of the first current mirror unit 831, which means that when the second current mirror unit 832 is turned on, the bias current of the second power supply module 82 can be mirrored to the input end of the voltage regulator circuit 211. This design ensures that the path switching of the bias current is successfully completed in the current mirror module.

[0337] like Figure 1 As shown, the first current mirror unit 831 includes: a 49th switch tube 8311 and a 50th switch tube 8312. The 49th switch tube 8311 and the 50th switch tube 8312 can be n-type MOSFETs. The drain of the 49th switch tube 8311 is connected to the third end of the second current mirror, the gate of the 49th switch tube 8311, the gate of the 38th switch tube 6129 in the voltage stabilizing circuit 211, and the gate of the 39th switch tube 6120 in the voltage stabilizing circuit 211 to provide a bias voltage, and the gate of the 49th switch tube 8311 is connected to the drain of the 49th switch tube 8311 and the gate of the 27th switch tube 6114 in the voltage stabilizing circuit 211 to provide a bias current.

[0338] The drain of the forty-ninth switch tube 8311 is connected to multiple key nodes, including the second current mirror unit 832 and multiple switch tubes in the voltage stabilization circuit 211. Through this connection, the forty-ninth switch tube 8311 can generate and maintain the bias voltage required for the startup and voltage stabilization stages.

[0339] In some embodiments, the drain of the 50th switch tube 8312 is connected to the source of the 49th switch tube 8311 and the gate of the 50th switch tube 8312, the gate of the 50th switch tube 8312 is connected to the drain of the 50th switch tube 8312 and the gate of the 26th switch tube 6113 in the voltage stabilizing circuit 211, and the source of the 50th switch tube 8312 is connected to the negative voltage source.

[0340] Specifically, the 50th switch tube 8312 cooperates with the 49th switch tube 8311 to generate a bias current by mirroring the current and provide it to the voltage stabilizing circuit 211. This structure ensures the accuracy and stability of the bias current and prevents current fluctuations in the startup phase.

[0341] In some embodiments, Figure 1 As shown, the second current mirror unit 832 includes: a fifty-first switch tube 8321, a fifty-second switch tube 8322, a fifty-third switch tube 8323 and a fifty-fourth switch tube 8324.

[0342] In some embodiments, the fifty-first switch tube 8321, the fifty-second switch tube 8322, the fifty-third switch tube 8323, and the fifty-fourth switch tube 8324 may be p-type MOSFETs. The source of the fifty-first switch tube 8321 is connected to the gate of the fifty-first switch tube 8321 and the drain of the forty-seventh switch tube 824. The gate of the fifty-second switch tube 8322 is connected to the gate of the fifty-first switch tube 8321 and the source of the fifty-first switch tube 8321, and the source of the fifty-second switch tube 8322 is connected to the drain of the forty-ninth switch tube 8311. The source of the fifty-third switch tube 8323 is connected to the gate of the fifty-third switch tube 8323 and the drain of the fifty-first switch tube 8321, and the drain of the fifty-third switch tube 8323 is connected to a positive voltage source. The gate of the fifty-fourth switch tube 8324 is connected to the gate of the fifty-third switch tube 8323 and the source of the fifty-third switch tube 8323, the source of the fifty-fourth switch tube 8324 is connected to the drain of the fifty-second switch tube 8322, and the drain of the fifty-fourth switch tube 8324 is connected to the positive voltage source.

[0343] In some embodiments, the fifty-first switch tube 8321, the fifty-second switch tube 8322, the fifty-third switch tube 8323, and the fifty-fourth switch tube 8324 can form a common-source common-gate current mirror, which significantly improves the output impedance of the second current mirror unit 832 through the cascaded MOSFET configuration. This enables the second current mirror unit 832 to maintain a relatively stable current output when the load current changes, reducing the sensitivity of the second current mirror unit 832 to load changes.

[0344] like Figure 1 As shown, the second current mirror unit 832 further includes: a fifty-fifth switch tube 8325. The fifty-fifth switch tube 8325 can be a p-type MOSFET. The gate of the fifty-fifth switch tube 8325 is connected to the gate of the fifty-third switch tube 8323, the source of the fifty-third switch tube 8323, and the drain of the fifty-first switch tube 8321, and the source of the fifty-fifth switch tube 8325 is connected to the gate of the forty-third switch tube 810 and the drain of the forty-fourth switch tube 821, and is used to control the forty-third switch tube 810 to be turned off when turned on to turn off the first bias current.

[0345] Specifically, the fifty-fifth switch tube 8325 in the second current mirror unit 832 controls the working state of the forty-third switch tube 810 by adjusting the potential difference between the gate and the source. This control mechanism ensures that under certain conditions, the first bias current can be effectively turned off, thereby optimizing the startup process and stability of the circuit. The gate potential of the fifty-fifth switch tube 8325 determines its on or off state. When the fifty-fifth switch tube 8325 is turned on, it achieves the purpose of turning off the first bias current by affecting the gate potential of the forty-third switch tube 810. This control logic ensures that the current switching is accurate and timely during the startup process.

[0346] In general, when the fourth external control signal is flipped from a low potential to a high potential, the series inverse ratio tube structure 820 (the 44th switch tube 821, the 45th switch tube 822 and the 46th switch tube 823) is turned on, the gate voltage of the 43rd switch tube 810 is pulled down, so that the 43rd switch tube 810 is also turned on, and the source voltage of the 43rd switch tube 810 is pulled up, so that the source of the 43rd switch tube 810 is connected to the current mirror module. At this time, the first bias current can flow from the positive voltage source to the current mirror module through the 43rd switch tube 810. At this time, the bias voltage at the bias voltage end and the voltage stabilization signal output by the voltage stabilization circuit 211 begin to be established.

[0347] Further, when the bias voltage at the bias voltage terminal reaches the voltage threshold, the 47th switch tube 824 is turned on, and when the voltage regulation signal output by the voltage regulation circuit 211 reaches the voltage regulation threshold, the 48th switch tube 825 is turned on. Then, the gate voltage of the 55th switch tube 8325 is pulled down to turn it on. Since the drain voltage pulling capability of the 55th switch tube 8325 is much greater than the pulling capability of the series inverse ratio tube structure 820 (the 44th switch tube 821, the 45th switch tube 822 and the 46th switch tube 823), the gate voltage of the 43rd switch tube 810 is pulled to a high potential, and the 43rd switch tube 810 is turned off. At this time, the forty-eighth switch tube 825 starts to provide current, which is copied to the forty-ninth switch tube 8311 and the fiftieth switch tube 8312 through the common-source and common-gate current mirror (the fifty-first switch tube 8321, the fifty-second switch tube 8322, the fifty-third switch tube 8323, and the fifty-fourth switch tube 8324), providing a second bias current for the voltage stabilizing circuit 211, thereby starting normally.

[0348] In some embodiments, the startup circuit 212 further includes: two fifty-sixth switch tubes 91, the drain of each fifty-sixth switch tube 91 is connected to the positive voltage source, the gate of each fifty-sixth switch tube 91 is connected to the fourth external control signal terminal, and the source of the two fifty-sixth switch tubes 91 is respectively connected to the gate of the forty-third switch tube 810 and the gate of the fifty-fifth switch tube 8325, and is used to pull up the gate voltage of the forty-third switch tube 810 and the fifty-fifth switch tube 8325 when the power switch signal of the on-chip power supply system 2000 where the startup circuit 212 is located is a shutdown signal. At this time, the forty-third switch tube 810 and the fifty-fifth switch tube 8325 are turned off to turn off the first bias current.

[0349] In some embodiments, the startup circuit 212 also includes: four fifty-seventh switch tubes 92, the source of each fifty-seventh switch tube 92 is connected to the negative voltage source, the gate of each fifty-seventh switch tube 92 is connected to the third external control signal terminal, and the drains of the four fifty-seventh switch tubes 92 are respectively connected to the bias voltage terminal of the bias current generating circuit 210, the gate of the twenty-fourth switch tube 321 of the bias current generating circuit 210, the input terminal of the first-stage operational amplifier structure of the voltage stabilizing circuit 211, and the output terminal of the voltage stabilizing circuit 211, so as to pull down the bias voltage terminal of the bias current generating circuit 210, the gate of the twenty-fourth switch tube 321 of the bias current generating circuit 210, the input terminal of the first-stage operational amplifier structure of the voltage stabilizing circuit 211, and the output terminal of the voltage stabilizing circuit 211 when the power switch signal of the on-chip power supply system 2000 where the startup circuit 212 is located is a shutdown signal.

[0350] Specifically, when the power switch signal of the on-chip power supply system 2000 is a shutdown signal, the fifty-seventh switch tube 92 is turned on, thereby connecting its drain to the negative voltage source. At this time, the four fifty-seventh switch tubes 92 will pull down the voltage of each node to which they are connected, that is, reduce the bias voltage of the bias current generating circuit 210, which helps to adjust the generation of the bias current. Reduce the gate voltage of the twenty-fourth switch tube 321 to turn it off. Pull down the input terminal voltage of the first-stage operational amplifier structure of the voltage stabilizing circuit 211, thereby affecting the subsequent voltage stabilizing operation. Reduce the output terminal voltage of the voltage stabilizing circuit 211, which helps to control the output state of the entire voltage stabilizing circuit 211.

[0351] Reference below Figure 13-14 An on-chip power supply system according to an embodiment of a seventh aspect of the present invention is described.

[0352] Fig.13 is a block diagram of an on-chip power supply system according to an embodiment of the present invention. Fig.13 As shown, the on-chip power supply system 2000 includes: the bias current generating circuit 210 described in the above embodiment, the voltage stabilizing circuit 211 described in the above embodiment, and the starting circuit 212 described in the above embodiment.

[0353] Among them, the voltage stabilizing circuit 211 is connected to the starting circuit 212 and the bias current generating circuit 210, and the starting circuit 212 is connected to the bias current generating circuit 210. Specifically, the bias current generating circuit 210 provides a stable bias current for the voltage stabilizing circuit 211, which is crucial to the normal operation of the voltage stabilizing circuit 211. The voltage stabilizing circuit 211 relies on the bias current to maintain the stability of the output voltage. The starting circuit 212 can initialize the voltage stabilizing circuit 211 when the system starts up to ensure that the voltage stabilizing circuit 211 can work normally during the startup phase. The starting circuit 212 adjusts the state of the voltage stabilizing circuit 211 through the control signal and the switch tube to achieve the correct voltage output. The starting circuit 212 is also responsible for adjusting the working state of the bias current generating circuit 210 to ensure that the correct bias current is provided during the startup phase.

[0354] According to the on-chip power supply system 2000 of the embodiment of the present invention, by integrating the bias current generating circuit 210, the voltage stabilizing circuit 211 and the starting circuit 212, the efficient management of the on-chip power supply system 2000 from startup to stable output is realized. In the system startup stage, the starting circuit 212 quickly provides the initial bias current through the first power supply module 81 to ensure the rapid establishment of the bias current generating circuit 210 and the voltage stabilizing circuit 211. As the system voltage gradually rises, the output of the voltage stabilizing circuit 211 gradually tends to be stable. When the set voltage threshold and voltage stabilization threshold are reached, the second power supply module 82 of the starting circuit 212 replaces the first power supply module 81 to provide a stable second bias current to ensure that the voltage stabilizing circuit 211 can continuously output a stable voltage. The bias current generating circuit 210 effectively filters the bias voltage through the RC filtering module 2 to further stabilize the output of the bias current. The current mirror module mirrors the startup current and the steady-state current to the output end of the voltage stabilizing circuit 211 to maintain the high precision and low noise output of the power supply system. This multi-module coordinated working mechanism not only speeds up the startup speed of the on-chip power supply system 2000, but also ensures that the system always maintains a stable voltage output during operation, improves the system's response speed and power supply ripple suppression ratio, thereby meeting the high requirements for power supply accuracy and stability.

[0355] Fig.14 is a schematic diagram of an implementation of an on-chip power supply system according to an embodiment of the present invention. Fig.14 As shown, the on-chip power supply system 2000 includes a bias current generating circuit 210 module, a voltage stabilizing circuit 211 module and a start-up circuit 212 module. When the system is powered on, the reference voltage Vref is input into a low voltage dropout linear regulator (LDO), which converts it into a stable power supply voltage for the bias current generating circuit. In order to quickly establish the power supply voltage of the bias current generating circuit module, the Start-up module (the circuit part responsible for the power startup and initialization process) can provide additional support to speed up the voltage establishment time.

[0356] Furthermore, the Ibias module (a module for providing bias current) generates a reference current Iref using the power supply voltage of the bias current generating circuit module, and the bias start control module 1 further accelerates the process of establishing the reference current.

[0357] Furthermore, once the power supply voltage and reference current Iref of the bias current generating circuit module are established and stabilized, the entire system enters a normal operating state. The LDO continues to adjust to cope with small fluctuations in the power supply voltage to ensure that the load continues to operate stably.

[0358] Reference below Fig.15 An electronic device according to an embodiment of an eighth aspect of the present invention is described.

[0359] Fig.15 is a block diagram of an electronic device according to an embodiment of the present invention, such as Fig.15 As shown, the electronic device 200 includes the on-chip power supply system 2000 described in the above embodiment.

[0360] In some embodiments, the electronic device 200 may be any device that relies on electricity to operate, and these devices may include but are not limited to computers, mobile phones, tablet computers, embedded systems, home appliances, automotive electronic systems, etc.

[0361] According to the electronic device 200 of the embodiment of the present invention, by adopting the on-chip power supply system 2000 described in the above embodiment, the efficient startup and stable operation of the electronic device 200 are ensured. Specifically, the on-chip power supply system 2000 quickly establishes the power supply voltage and stabilizes the output through the coordinated work of the bias current generating circuit 210, the voltage stabilizing circuit 211 and the startup circuit 212 inside it, so that the electronic device 200 can quickly enter the working state after startup. At the same time, the RC filter module 2 in the on-chip power supply system 2000 effectively filters out the noise in the power supply process and reduces the time constant. Therefore, this design not only shortens the startup time of the electronic device 200, but also ensures the stability and reliability of the device in a complex working environment, thereby meeting the requirements for high performance and high stability of the electronic device 200.

[0362] Reference below Fig.16 A vehicle according to an embodiment of a ninth aspect of the present invention will be described.

[0363] Fig.16 is a block diagram of a vehicle according to an embodiment of the present invention, Fig.16 As shown, the vehicle 100 includes the electronic device 200 described in the above embodiment.

[0364] In some embodiments, the vehicle 100 may be various types of vehicles, including but not limited to cars, trucks, motorcycles, electric vehicles, hybrid vehicles, etc.

[0365] According to the vehicle 100 of the embodiment of the present invention, by adopting the electronic device 200 described in the above embodiment, the on-chip power supply system 2000 in the electronic device 200 includes a bias current generating circuit 210, a voltage stabilizing circuit 211 and a starting circuit 212. The coordinated work of these circuits can quickly provide the required bias current and ensure that the power supply voltage is quickly established, thereby significantly accelerating the startup speed of the entire vehicle 100 electrical system, improving the response time of the vehicle 100 system, and improving the overall performance of the vehicle 100 under various working conditions.

[0366] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example.

[0367] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A bias start control module, characterized in that: A first RC filter structure for filtering a bias voltage in a bias current generating circuit is used to control the bias start control module, wherein the bias start control module comprises: a logic control unit connected to the power supply voltage terminal of the bias current generating circuit, and configured to generate a switch signal according to the power supply voltage of the bias current generating circuit and an external control signal; A first switch tube, wherein the gate of the first switch tube is connected to the logic control unit, the drain of the first switch tube is connected to the first end of the first resistance unit of the first RC filter structure, the source of the first switch tube is connected to the second end of the first resistance unit, and the first switch tube is used to be turned on when the switch signal corresponds to turning on the quick start function to short-circuit the first resistance unit.

2. The bias start control module according to claim 1, characterized in that: The logic control unit comprises: a power-on reset subunit, wherein an input terminal of the power-on reset subunit is suitable for inputting a power supply voltage of the bias current generating circuit, and the power-on reset subunit is used to generate a power-on reset signal according to the power supply voltage; A latch subunit, wherein the input end of the latch subunit is connected to the output end of the power-on reset subunit, and the latch subunit is used to generate the switch signal according to the power-on reset signal and the external control signal.

3. The bias start control module according to claim 2, characterized in that: The power-on reset subunit comprises: A power supply voltage detector, wherein an input terminal of the power supply voltage detector is adapted to input the power supply voltage and is used to convert the power supply voltage into a digital signal; A first inverter, the input end of which is connected to the output end of the power supply voltage detector, for inverting the digital signal of the power supply voltage and outputting a first power supply voltage inverted signal; A delay filter, wherein the input end of the delay filter is connected to the output end of the first inverter, and is used to generate the power-on reset signal according to the first power supply voltage reverse signal.

4. The bias start control module according to claim 3, characterized in that: The power supply voltage detector comprises: a second switch tube, wherein a drain of the second switch tube is connected to a positive voltage source, and a gate of the second switch tube is connected to a negative voltage source; a third switch tube, wherein a drain of the third switch tube is connected to a source of the second switch tube, and a gate of the third switch tube is connected to a gate of the second switch tube and the negative voltage source; a fourth switch tube, wherein a drain of the fourth switch tube is connected to a source of the third switch tube, and a gate of the fourth switch tube is connected to a power supply voltage terminal of the bias current generating circuit; a fifth switch tube, wherein the drain of the fifth switch tube is connected to the source of the fourth switch tube, and the gate of the fifth switch tube is connected to the control end of the fourth switch tube and the power supply voltage end of the bias current generating circuit; a sixth switch tube, wherein the drain of the sixth switch tube is connected to the source of the fifth switch tube, the gate of the sixth switch tube is connected to the control end of the fifth switch tube and the power supply voltage end of the bias current generating circuit, and a first node is provided between the drain of the sixth switch tube and the source of the fifth switch tube, and the first node is used to output a digital signal of the power supply voltage; A seventh switch tube, wherein the drain of the seventh switch tube is connected to the source of the sixth switch tube, the gate of the seventh switch tube is connected to the gate of the sixth switch tube and the power supply voltage end of the bias current generating circuit, and the source of the seventh switch tube is connected to the negative voltage source.

5. The bias start control module according to claim 3, characterized in that: The power supply voltage detector comprises: A voltage divider circuit unit, wherein a first end of the voltage divider circuit unit is connected to a positive voltage source, and a second end of the voltage divider circuit unit is connected to a negative voltage source, for obtaining a voltage divider signal; A comparator, wherein the positive input terminal of the comparator is connected to the output terminal of the voltage divider circuit unit, the power supply voltage of the bias current generating circuit is input to the reverse input terminal of the comparator, and the comparator is used to output a digital signal of the power supply voltage according to the voltage divider signal and the power supply voltage.

6. The bias start control module according to claim 5, characterized in that: The voltage divider circuit unit comprises: A first resistor and a second resistor, wherein the first end of the first resistor is connected to the positive voltage source, the second end of the first resistor is connected to the first end of the second resistor, a second node is provided between the first end of the second resistor and the second end of the first resistor, the second node is connected to the positive input end of the comparator to output the voltage division signal, and the second end of the second resistor is connected to the negative voltage source.

7. The bias start control module according to claim 3, characterized in that: The delay filter comprises: A delay generator, connected to the output end of the first inverter, and configured to generate a delay signal according to the first power supply voltage reverse signal; A Schmitt trigger is connected to the delay generator and is used to generate the power-on reset signal according to the delay signal.

8. The bias start control module according to claim 7, characterized in that: The delay generator comprises: an eighth switch tube, wherein a drain of the eighth switch tube is connected to a positive voltage source, and a gate of the eighth switch tube is connected to an output end of the first inverter; a ninth switch tube, wherein the drain of the ninth switch tube is connected to the source of the eighth switch tube, the gate of the ninth switch tube is connected to the bias voltage terminal of the bias current generating circuit, a third node is provided between the drain of the ninth switch tube and the source of the eighth switch tube, and the third node is connected to the Schmitt trigger to transmit the delay signal; a tenth switch tube, wherein the drain of the tenth switch tube is connected to the source of the ninth switch tube, the source of the tenth switch tube is connected to a negative voltage source, and the gate of the tenth switch tube is connected to the bias voltage terminal of the bias current generating circuit; an eleventh switch tube, wherein a gate of the eleventh switch tube is connected to the third node and the Schmitt trigger, and a source and a drain of the eleventh switch tube are both connected to a negative voltage source; A first capacitor, wherein a first end of the first capacitor is connected to the third node and the Schmitt trigger, and a second end of the first capacitor is connected to the negative voltage source.

9. The bias start control module according to claim 8, characterized in that: The Schmitt trigger comprises: a twelfth switch tube, wherein a drain of the twelfth switch tube is connected to the positive voltage source, and a gate of the twelfth switch tube is connected to the third node, the gate of the eleventh switch tube, and the first end of the first capacitor; a thirteenth switch tube, wherein the drain of the thirteenth switch tube is connected to the source of the twelfth switch tube, the gate of the thirteenth switch tube is connected to the third node, the gate of the eleventh switch tube and the first end of the first capacitor, and a fourth node is defined between the drain of the thirteenth switch tube and the source of the twelfth switch tube; a fourteenth switch tube, wherein the drain of the fourteenth switch tube is connected to the source of the thirteenth switch tube, the source of the fourteenth switch tube is connected to a negative voltage source, and the gate of the fourteenth switch tube is connected to the third node, the gate of the eleventh switch tube and the first end of the first capacitor; A fifteenth switch tube, the source of the fifteenth switch tube is connected to the source of the thirteenth switch tube and the drain of the fourteenth switch tube, the drain of the fifteenth switch tube is connected to a positive voltage source, and the gate of the fifteenth switch tube is connected to the fourth node to output the power-on reset signal.

10. The bias start control module according to claim 3, characterized in that: The delay filter comprises: Multiple D flip-flops are connected in series, and the multiple D flip-flops use the same clock signal. The input end of the first D flip-flop among the multiple D flip-flops connected in series is connected to the output end of the first inverter, so as to delay the first power supply voltage reverse signal and output the power-on reset signal.

11. The bias start control module according to claim 2, characterized in that: The latch subunit comprises: A latch, the input end of the latch is connected to the output end of the power-on reset subunit, and is used to generate a latch signal according to the power-on reset signal and the external control signal; A first NOR gate, wherein a first input terminal of the first NOR gate is connected to an output terminal of the latch, and a second input terminal of the first NOR gate is input with a first external control signal; A second inverter, wherein the input end of the second inverter is connected to the output end of the first NOR gate, and is used for inverting the output signal of the first NOR gate circuit to obtain the switch signal.

12. The bias start control module according to claim 11, characterized in that: The latch comprises: a second NOR gate, wherein a first input terminal of the second NOR gate is connected to an output terminal of the power-on reset sub-unit, a second input terminal of the second NOR gate is adapted to input a second external control signal, and an output terminal of the second NOR gate is connected to a first input terminal of the first NOR gate to output the latch signal; A third NOR gate, wherein the first input terminal of the third NOR gate is connected to the third external control signal, the second input terminal of the third NOR gate is connected to the output terminal of the second NOR gate, and the output terminal of the third NOR gate is connected to the third input terminal of the second NOR gate.

13. The bias start control module according to any one of claims 1 to 12, characterized in that: The output end of the logic control unit is also suitable for connecting to a second RC filter structure to be turned on when the switch signal output by the logic control unit corresponds to turning on the quick start function, so as to short-circuit the second resistance unit in the second RC filter structure, wherein the second RC filter structure is used to filter the reference voltage of the voltage stabilizing circuit, and the voltage stabilizing circuit and the bias current generating circuit are located in the same on-chip power supply system.

14. The bias start control module according to claim 12, characterized in that: The third external control signal is consistent with the timing of a power switch signal of an on-chip power supply system where the bias current generating circuit is located.

15. The bias start control module according to any one of claims 1 to 12, characterized in that: The first switch tube is further configured to be disconnected when the switch signal corresponds to turning off the quick start function, so as to restore the RC filtering function of the first RC filtering structure.

16. An RC filter module, characterized in that: include: A first RC filtering structure, wherein the first RC filtering structure comprises a first resistor unit and a first capacitor unit, wherein the first end of the first resistor unit is connected to the bias voltage end of the bias current generating circuit and the first end of the first switch tube of the bias startup control module according to any one of claims 1 to 15, the second end of the first resistor unit is connected to the first end of the first capacitor unit and the second end of the first switch tube, and the second end of the first capacitor unit is connected to a negative voltage source, for filtering the bias voltage of the bias current generating circuit.

17. The RC filter module according to claim 16, characterized in that: The RC filter module also includes: A pre-charging control unit is connected to the logic control unit of the bias startup control module and the first end of the first capacitor unit, and is used for pre-charging the first capacitor unit.

18. The RC filter module according to claim 17, characterized in that: The first resistance unit comprises: a sixteenth switch tube, wherein a drain of the sixteenth switch tube is connected to a bias voltage terminal of the bias current generating circuit and a drain of the first switch tube, and a gate of the sixteenth switch tube is connected to a power supply voltage terminal of the bias current generating circuit; A third resistor, wherein a first end of the third resistor is connected to the source of the sixteenth switch tube, and a second end of the third resistor is connected to the first end of the pre-charge control unit and the source of the first switch tube.

19. The RC filter module according to claim 18, characterized in that: The first capacitor unit includes: a second capacitor, wherein a first end of the second capacitor is connected to a second end of the third resistor, a first end of the pre-charge control unit, and a source of the first switch tube, and a second end of the second capacitor is connected to a negative voltage source; A seventeenth switch tube, wherein the gate of the seventeenth switch tube is connected to the second end of the second resistor, the first end of the second capacitor, the first end of the pre-charge control unit and the source of the first switch tube, and the source and drain of the seventeenth switch tube are both connected to the negative voltage source.

20. The RC filter module according to claim 19, characterized in that: The pre-charge control unit comprises: a fourth NOR gate, wherein a first input terminal of the fourth NOR gate is connected to an output terminal of a logic control unit of the bias startup control module, and a second input terminal of the fourth NOR gate is adapted to input a third external control signal, wherein the third external control signal is consistent in timing with a power supply signal of an on-chip power supply system where the bias current generating circuit is located; an eighteenth switch tube, wherein the gate of the eighteenth switch tube is connected to the output end of the fourth NOR gate, and the drain of the eighteenth switch tube is connected to a positive voltage source; A fourth resistor, wherein a first end of the fourth resistor is connected to the source of the eighteenth switch tube, and a second end of the fourth resistor is connected to the second end of the third resistor, the first end of the second capacitor, the gate of the seventeenth switch tube and the source of the first switch tube.

21. The RC filter module according to claim 20, characterized in that: The fourth NOR gate is used to obtain an enable signal according to the switch signal output by the logic control unit and the third external control signal, and the enable signal corresponds to the delay signal generated by the delay filter in the logic control unit.

22. The RC filter module according to claim 21, characterized in that: The eighteenth switch tube is turned on under the delayed signal to charge the first capacitor unit together with the path of the first switch tube.

23. The RC filter module according to any one of claims 20 to 22, characterized in that: The pre-charge control unit also includes: A third inverter, wherein an input terminal of the third inverter is connected to an output terminal of the fourth NOR gate; A nineteenth switch tube, wherein the gate of the nineteenth switch tube is connected to the output end of the third inverter, the drain of the nineteenth switch tube is connected to the gate of the seventeenth switch tube, the first end of the second capacitor, the second end of the fourth resistor, and the second end of the third resistor, and the source of the nineteenth switch tube is connected to the second end of the first switch tube.

24. The RC filter module according to claim 23, characterized in that: When the eighteenth switch tube is turned on, the nineteenth switch tube is turned off to cut off the connection between the first end of the first capacitor unit and the second end of the first switch tube.

25. The RC filter module according to claim 24, characterized in that: When the nineteenth switch tube is turned on, the voltage across the first capacitor unit is equal to the voltage at the second end of the first switch tube.

26. An RC filter module, characterized in that: include: a second RC filter structure, the second RC filter structure comprising a second resistor unit and a second capacitor unit, the first end of the second resistor unit being suitable for being connected to a reference voltage source, the first end of the second capacitor unit being connected to the second end of the second resistor unit, the second end of the second capacitor unit being connected to a negative voltage source, a fifth node being provided between the first end of the second capacitor unit and the second end of the second resistor unit, the fifth node being suitable for being connected to a voltage stabilizing circuit of an on-chip power supply system; A twentieth switch tube, wherein the gate of the twentieth switch tube is connected to the output end of the logic control unit of the bias startup control module described in any one of claims 1 to 15, the source of the twentieth switch tube is connected to the first end of the second resistance unit and the reference voltage source, and the drain of the twentieth switch tube is connected to the second end of the second resistance unit and the fifth node, and is used for being turned on when the switch signal output by the logic control unit corresponds to turning on the quick startup function, so as to short-circuit the second resistance unit.

27. The RC filter module according to claim 26, characterized in that: The second resistance unit includes: a fifth resistor, a first end of the fifth resistor being connected to the reference voltage source and the source of the twentieth switch tube; A twenty-first switch tube, a drain of the twenty-first switch tube is connected to the second end of the fifth resistor, a source of the twenty-first switch tube is connected to the drain of the twentieth switch tube and the fifth node, a gate of the twenty-first switch tube is connected to the third external control signal end, and the third external control signal is consistent in timing with the power supply switch signal of the on-chip power supply system.

28. The RC filter module according to claim 27, characterized in that: The second capacitor unit includes: a third capacitor, a first end of the third capacitor being connected to the fifth node, and a second end of the third capacitor being connected to a negative voltage source; A twenty-second switch tube, wherein the gate of the twenty-second switch tube is connected to the fifth node, and the source and drain of the twenty-second switch tube are both connected to the negative voltage source.

29. A bias current generating circuit, characterized in that: include: The bias startup control module according to any one of claims 1 to 15 and the RC filter module according to any one of claims 16 to 25, wherein the bias startup control module is connected to the RC filter module; A bias current generating module is connected to the RC filter module and the bias start control module respectively.

30. The bias current generating circuit according to claim 29, characterized in that: The bias current generating module comprises: A filter unit, wherein an input end of the filter unit is connected to a reference voltage source to filter the reference voltage; a bias current generating unit, the input end of the bias current generating unit being connected to the output end of the filtering unit, and being used to generate a bias current according to the filtered reference voltage; A low voltage cascode current mirror, wherein a first end of the low voltage cascode current mirror is connected to an output end of the bias current generating unit and is used for mirroring the bias current; A bias voltage providing unit, wherein a first end of the bias voltage providing unit is connected to a second end of the low-voltage common-source common-gate current mirror and a drain of a first switch tube in the bias startup control module, a second end of the bias voltage providing unit is a bias voltage end of the bias current generating circuit, the bias voltage end is connected to a first end of a first resistor unit in the RC filter module and a drain of the first switch tube, and a third end of the bias voltage providing unit is connected to a negative voltage source for providing a bias voltage.

31. The bias current generating circuit according to claim 30, characterized in that: The filtering unit comprises: a sixth resistor, a first end of the sixth resistor being connected to the reference voltage source; A third capacitor unit, wherein the first end of the third capacitor unit is connected to the second end of the sixth resistor, the second end of the third capacitor unit is connected to a negative voltage source, and a sixth node is provided between the first end of the third capacitor unit and the second end of the sixth resistor to output a filtered reference voltage.

32. The bias current generating circuit according to claim 31, characterized in that: The third capacitor unit comprises: a fourth capacitor, wherein a first end of the fourth capacitor is connected to the second end of the sixth resistor and the sixth node, and a second end of the fourth capacitor is connected to the negative voltage source; A twenty-third switch tube, a gate of the twenty-third switch tube is connected to the first end of the fourth capacitor and the sixth node, and a source and a drain of the twenty-third switch tube are both connected to the negative voltage source.

33. The bias current generating circuit according to claim 30, characterized in that: The bias current generating unit comprises: a twenty-fourth switch tube, wherein the gate of the twenty-fourth switch tube is connected to the sixth node, and the drain of the twenty-fourth switch tube is connected to the output end of the low-voltage common-source common-gate current mirror, for providing current driving capability; A seventh resistor and an eighth resistor, wherein the first end of the seventh resistor is connected to the source of the twenty-fourth switch tube, the second end of the seventh resistor is connected to the first end of the eighth resistor, and the second end of the eighth resistor is connected to a negative voltage source to generate a bias current.

34. The bias current generating circuit according to claim 30, wherein: The power supply end of the low-voltage cascode current mirror is connected to the output end of the voltage stabilizing circuit of the on-chip power supply system where the bias current generating circuit is located, so that the voltage stabilizing signal output by the voltage stabilizing circuit is used as the power supply voltage.

35. The bias current generating circuit according to claim 34, characterized in that: The power supply end of the low-voltage cascode current mirror is connected to the output end of the voltage stabilizing circuit through a filter circuit.

36. The bias current generating circuit according to claim 35, characterized in that: The bias current generating circuit also includes: A fifth capacitor, wherein a first end of the fifth capacitor is connected to the output end of the voltage stabilizing circuit and the filter circuit, and a second end of the fifth capacitor is connected to a negative voltage source.

37. The bias current generating circuit according to claim 30, characterized in that: The bias voltage providing unit comprises: A twenty-fifth switch tube, the drain of the twenty-fifth switch tube is connected to the second end of the low-voltage common-source and common-gate current mirror and the drain of the first switch tube in the bias startup control module, the gate of the twenty-fifth switch tube is connected to the drain of the twenty-fifth switch tube, the drain of the first switch tube, and the drain of the sixteenth switch tube in the first resistance unit, and the source of the twenty-fifth switch tube is connected to a negative voltage source.

38. The bias current generating circuit according to claim 29, characterized in that: The bias current generating circuit also includes: At least one bias current output switch tube, the gate of each bias current output switch tube is connected to the output end of the RC filter module, the source of each bias current output switch tube is connected to a negative voltage source, and the drain of each bias circuit output switch tube is suitable for connecting to a corresponding bias current demand module.

39. A voltage stabilizing circuit, characterized in that: include: A voltage stabilizing module and an RC filtering module as described in any one of claims 26 to 28, wherein the voltage stabilizing module is connected to the RC filtering module.

40. The voltage stabilizing circuit according to claim 39, characterized in that: The voltage stabilizing module comprises: A first-stage operational amplifier structure, wherein a power supply terminal of the first-stage operational amplifier structure is suitable for inputting a bias current for power supply, and an input terminal of the first-stage operational amplifier structure is connected to a fifth node in the RC filter module to input a filtered bandgap reference voltage, and is used to generate an operational amplifier signal according to the bandgap reference voltage; A second-stage operational amplifier structure, wherein the input end of the second-stage operational amplifier structure is connected to the output end of the first-stage operational amplifier structure, and is used to generate a voltage-stabilized signal according to the operational amplifier signal.

41. The voltage stabilizing circuit according to claim 40, characterized in that: The output end of the second-stage operational amplifier structure is connected to a bias current generating circuit that generates the bias current, so that the voltage-stabilized signal serves as a power supply voltage of the bias current generating circuit.

42. The voltage stabilizing circuit according to claim 41, characterized in that: The first-stage operational amplifier structure includes: A power supply unit, wherein a first end of the power supply unit is adapted to input a bias current, and is used to generate an operational amplifier power supply current according to the bias current; An operational amplifier unit, wherein a power supply end of the operational amplifier unit is connected to the power supply unit, and an input end of the operational amplifier unit is connected to the RC filter module, and is used to generate an operational amplifier signal according to the bandgap reference voltage.

43. The voltage stabilizing circuit according to claim 42, characterized in that: The power supply unit comprises: A current mirror unit, wherein the input end of the current mirror unit is suitable for inputting a bias current, and is used for mirroring the bias current; A current source subunit, wherein a first end of the current source subunit is connected to the output end of the current mirror unit, and a second end of the current source subunit is connected to the power supply end of the operational amplifier unit.

44. The voltage stabilizing circuit according to claim 43, characterized in that: The current mirror unit comprises: a twenty-sixth switch tube, wherein the gate of the twenty-sixth switch tube is suitable for inputting the bias current, and the source of the twenty-sixth switch tube is connected to a negative voltage source; A twenty-seventh switch tube, the gate of the twenty-seventh switch tube is suitable for inputting the bias current, the source of the twenty-seventh switch tube is connected to the drain of the twenty-sixth switch tube, and the drain of the twenty-seventh switch tube is connected to the first end of the current source sub-unit.

45. The voltage stabilizing circuit according to claim 44, characterized in that: The current source subunit comprises: a twenty-eighth switch tube and a twenty-ninth switch tube, wherein the source of the twenty-eighth switch tube is connected to the drain of the twenty-seventh switch tube and the gate of the twenty-eighth switch tube, the gate of the twenty-eighth switch tube is connected to the gate of the twenty-ninth switch tube to provide a bias for the twenty-ninth switch tube, and the source of the twenty-ninth switch tube is connected to the power supply terminal of the operational amplifier unit; The 30th switch tube and the 31st switch tube, the source of the 30th switch tube is connected to the drain of the 28th switch tube and the gate of the 30th switch tube, the drain of the 30th switch tube is connected to a positive voltage source, the gate of the 30th switch tube is connected to the gate of the 31st switch tube to provide bias for the 31st switch tube, the source of the 31st switch tube is connected to the drain of the 29th switch tube, and the drain of the 31st switch tube is connected to the positive voltage source.

46. ​​The voltage stabilizing circuit according to claim 45, characterized in that: The operational amplifier unit comprises: a thirty-second switch tube and a thirty-third switch tube, wherein the gate of the thirty-second switch tube is connected to the fifth node of the RC filter module, the drain of the thirty-second switch tube is connected to the drain of the thirty-third switch tube, a seventh node is provided between the drain of the thirty-third switch tube and the drain of the thirty-second switch tube to serve as a power supply terminal of the operational amplifier unit, the power supply terminal is connected to the source of the twenty-ninth switch tube, and the thirty-second switch tube and the thirty-third switch tube are used to generate a differential signal; The thirty-fourth switch tube and the thirty-fifth switch tube, the drain of the thirty-fourth switch tube is connected to the gate of the thirty-fourth switch tube and the source of the thirty-second switch tube, the source of the thirty-fourth switch tube is connected to the negative voltage source, the drain of the thirty-fifth switch tube is connected to the source of the thirty-third switch tube and the gate of the thirty-fifth switch tube, and the source of the thirty-fifth switch tube is connected to the negative voltage source, and are used to convert the differential signal into an output current.

47. The voltage stabilizing circuit according to claim 46, characterized in that: The operational amplifier unit also includes: A ninth resistor and a tenth resistor, the first end of the ninth resistor is connected to the output end of the second-stage operational amplifier structure, the second end of the ninth resistor is connected to the first end of the tenth resistor, the second end of the tenth resistor is connected to a negative voltage source, an eighth node is provided between the second end of the ninth resistor and the first end of the tenth resistor, and the eighth node is connected to the gate of the thirty-third switch tube to form a negative feedback loop.

48. The voltage stabilizing circuit according to claim 46, characterized in that: The operational amplifier unit also includes: a thirty-sixth switch tube, wherein the gate of the thirty-sixth switch tube is connected to the gate of the thirty-fourth switch tube and the drain of the thirty-fourth switch tube, and the source of the thirty-sixth switch tube is connected to the negative voltage source, so as to increase the output impedance; A thirty-seventh switch tube, the gate of the thirty-seventh switch tube is connected to the gate of the thirty-fifth switch tube and the drain of the thirty-fifth switch tube, the source of the thirty-seventh switch tube is connected to the negative voltage source, and the drain of the thirty-seventh switch tube is connected to the output end of the second-stage operational amplifier structure through a sixth capacitor to increase the output impedance, and the sixth capacitor serves as a compensation capacitor.

49. The voltage stabilizing circuit according to claim 48, characterized in that: The operational amplifier unit also includes: A thirty-eighth switch tube and a thirty-ninth switch tube, the gate of the thirty-eighth switch tube is connected to the gate of the thirty-ninth switch tube, the source of the thirty-eighth switch tube is connected to the drain of the thirty-sixth switch tube, the gate of the thirty-eighth switch tube and the gate of the thirty-ninth switch tube also input a bias voltage, and the source of the thirty-ninth switch tube is connected to the drain of the thirty-seventh switch tube to increase the output gain to obtain the operational amplifier signal.

50. The voltage stabilizing circuit according to claim 49, characterized in that: The second-stage operational amplifier structure includes: an output conversion unit, wherein a first end of the output conversion unit is connected to a drain of the thirty-eighth switch tube and a drain of the thirty-ninth switch tube, and is used to convert an output signal of the thirty-eighth switch tube and an output signal of the thirty-ninth switch tube into an operational amplifier signal output; An output unit, wherein an input end of the output unit is connected to an output end of the output conversion unit, and an output end of the output unit is connected to a bias current generating circuit that generates the bias current, so as to output the regulated voltage signal.

51. The voltage stabilizing circuit according to claim 50, characterized in that: The output conversion unit comprises: The 40th switch tube and the 41st switch tube, the source of the 40th switch tube is connected to the drain of the 38th switch tube and the gate of the 40th switch tube, the gate of the 40th switch tube is connected to the gate of the 41st switch tube, the drain of the 40th switch tube is connected to a positive voltage source, the drain of the 41st switch tube is connected to the positive voltage source, and the source of the 41st switch tube is connected to the drain of the 39th switch tube and the input end of the output unit.

52. The voltage stabilizing circuit according to claim 51, characterized in that: The output unit comprises: A forty-second switch tube, the gate of the forty-second switch tube is connected to the source of the forty-first switch tube and the drain of the thirty-ninth switch tube, the drain of the forty-second switch tube is connected to the positive voltage source, the source of the forty-second switch tube is connected to the first end of the ninth resistor, and a ninth node is provided between the source of the forty-second switch tube and the first end of the ninth resistor to output the regulated voltage signal.

53. The voltage stabilizing circuit according to claim 52, characterized in that: The voltage stabilizing circuit further comprises: A compensation module, wherein a first end of the compensation module is connected to the positive voltage source, and a second end of the compensation module is connected to the gate of the forty-second switch tube, the source of the forty-first switch tube, and the drain of the thirty-ninth switch tube, for performing zero-point compensation.

54. The voltage stabilizing circuit according to claim 53, characterized in that: The compensation module comprises: An eleventh resistor and a seventh capacitor, the first end of the eleventh resistor is connected to the positive voltage source, the second end of the eleventh resistor is connected to the first end of the seventh capacitor, and the second end of the seventh capacitor is connected to the gate of the forty-second switch tube, the source of the forty-first switch tube, and the drain of the thirty-ninth switch tube.

55. A starting circuit, characterized in that: include: A first power supply module, the first power supply module is used to provide a first bias current in response to a fourth external control signal flipping from a low potential to a high potential, the fourth external control signal being logically opposite to a power supply switch signal of an on-chip power supply system where the startup circuit is located; A second power supply module, wherein the input end of the second power supply module is connected to the bias voltage end of the bias current generating circuit described in any one of claims 29 to 38 and the output end of the voltage stabilizing circuit described in any one of claims 39 to 54, and is used to control the first power supply module to shut down and provide a second bias current when the bias voltage at the bias voltage end reaches a voltage threshold and the voltage stabilizing signal output by the voltage stabilizing circuit reaches the voltage stabilizing threshold; A current mirror module, wherein the current mirror module is connected to the first power supply module and the second power supply module respectively, and is used to mirror the first bias current or the second bias current to the output end of the voltage stabilization circuit.

56. The startup circuit according to claim 55, characterized in that: The first power supply module comprises: a forty-third switch tube, wherein a drain of the forty-third switch tube is connected to a positive voltage source, and a source of the forty-third switch tube is connected to the current mirror module; a series inverse ratio tube structure, wherein a first end of the series inverse ratio tube structure is connected to the gate of the forty-third switch tube, a second end of the series inverse ratio tube structure is connected to a negative voltage source, and a control end of the series inverse ratio tube structure is suitable for inputting a fourth external control signal; When the fourth external control signal is flipped from a low potential to a high potential, the series inverse ratio tube structure is turned on and the forty-third switch tube is turned on to provide the first bias current.

57. The startup circuit according to claim 56, characterized in that: The series inverse ratio tube structure comprises: a 44th switch tube, wherein the drain of the 44th switch tube is connected to the gate of the 43rd switch tube, and the gate of the 44th switch tube is connected to the fourth external control signal terminal; a forty-fifth switch tube, wherein the drain of the forty-fifth switch tube is connected to the source of the forty-fourth switch tube, and the gate of the forty-fifth switch tube is connected to the fourth external control signal terminal; A forty-sixth switch tube, the drain of the forty-sixth switch tube is connected to the source of the forty-fifth switch tube, the gate of the forty-sixth switch tube is connected to the fourth external control signal terminal, and the source of the forty-sixth switch tube is connected to a negative voltage source.

58. The startup circuit according to claim 56, characterized in that: The second power supply module includes: a forty-seventh switch tube, wherein the gate of the forty-seventh switch tube is connected to the bias voltage terminal of the bias current generating circuit, the source of the forty-seventh switch tube is connected to the negative voltage source, and is configured to be turned on when the bias voltage at the bias voltage terminal reaches a voltage threshold; A forty-eighth switch tube, wherein the gate of the forty-eighth switch tube is connected to the output end of the voltage stabilizing circuit, the source of the forty-eighth switch tube is connected to the drain of the forty-seventh switch tube, and the drain of the forty-eighth switch tube is connected to the current mirror module, and is configured to be turned on when the voltage stabilizing signal output by the voltage stabilizing circuit reaches a voltage stabilizing threshold.

59. The startup circuit according to claim 58, characterized in that The current mirror module comprises: A first current mirror unit, wherein the first end of the first current mirror unit is connected to the source of the forty-third switch tube, the second end of the first current mirror unit is connected to a negative voltage source, and the third end of the first current mirror unit is connected to the input end of the voltage stabilizing circuit to mirror the first bias current to the voltage stabilizing circuit.

60. The startup circuit according to claim 59, characterized in that: The current mirror module also includes: A second current mirror unit, wherein the first end of the second current mirror unit is connected to the drain of the forty-eighth switch tube, the second end of the second current mirror unit is connected to the gate of the forty-third switch tube and the first end of the series inverse ratio tube structure to control the forty-third switch tube to be cut off when the forty-eighth switch tube is turned on, and the third end of the second current mirror unit is connected to the first end of the first current mirror unit to mirror the second bias current to the voltage stabilizing circuit.

61. The startup circuit according to claim 60, characterized in that: The first current mirror unit comprises: a forty-ninth switch tube, wherein the drain of the forty-ninth switch tube is connected to the third end of the second current mirror, the gate of the forty-ninth switch tube, the gate of the thirty-eighth switch tube in the voltage stabilizing circuit, and the gate of the thirty-ninth switch tube in the voltage stabilizing circuit to provide a bias voltage, and the gate of the forty-ninth switch tube is connected to the drain of the forty-ninth switch tube and the gate of the twenty-seventh switch tube in the voltage stabilizing circuit to provide a bias current; The fiftieth switch tube, the drain of the fiftieth switch tube is connected to the source of the forty-ninth switch tube and the gate of the fiftieth switch tube, the gate of the fiftieth switch tube is connected to the drain of the fiftieth switch tube and the gate of the twenty-sixth switch tube in the voltage stabilizing circuit, and the source of the fiftieth switch tube is connected to a negative voltage source.

62. The startup circuit according to claim 61, characterized in that: The second current mirror unit comprises: a fifty-first switch tube, wherein the source of the fifty-first switch tube is connected to the gate of the fifty-first switch tube and the drain of the forty-seventh switch tube; a fifty-second switch tube, wherein a gate of the fifty-second switch tube is connected to a gate of the fifty-first switch tube and a source of the fifty-first switch tube, and a source of the fifty-second switch tube is connected to a drain of the forty-ninth switch tube; a fifty-third switch tube, wherein the source of the fifty-third switch tube is connected to the gate of the fifty-third switch tube and the drain of the fifty-first switch tube, and the drain of the fifty-third switch tube is connected to a positive voltage source; A fifty-fourth switch tube, the gate of the fifty-fourth switch tube is connected to the gate of the fifty-third switch tube and the source of the fifty-third switch tube, the source of the fifty-fourth switch tube is connected to the drain of the fifty-second switch tube, and the drain of the fifty-fourth switch tube is connected to the positive voltage source.

63. The startup circuit according to claim 62, characterized in that: The second current mirror unit further includes: A fifty-fifth switch tube, wherein the gate of the fifty-fifth switch tube is connected to the gate of the fifty-third switch tube, the source of the fifty-third switch tube, and the drain of the fifty-first switch tube, and the source of the fifty-fifth switch tube is connected to the gate of the forty-third switch tube and the drain of the forty-fourth switch tube, and is used for controlling the forty-third switch tube to be cut off to turn off the first bias current when being turned on.

64. The startup circuit according to claim 63, characterized in that: The startup circuit also includes: There are two fifty-six switch tubes, each of which has a drain connected to a positive voltage source, and each of which has a gate connected to a fourth external control signal terminal. The sources of the two fifty-six switch tubes are respectively connected to the gate of the forty-third switch tube and the gate of the fifty-fifth switch tube, and are used to pull up the gates of the forty-third switch tube and the fifty-fifth switch tube when the power switch signal of the on-chip power supply system where the startup circuit is located is a shutdown signal.

65. The startup circuit according to claim 55, characterized in that The startup circuit also includes: Four fifty-seven switch tubes, each of which has a source connected to a negative voltage source, each of which has a gate connected to a third external control signal terminal, and the drains of the four fifty-seven switch tubes are respectively connected to the bias voltage terminal of the bias current generating circuit, the gate of the twenty-fourth switch tube of the bias current generating circuit, the input terminal of the first-stage operational amplifier structure of the voltage stabilizing circuit, and the output terminal of the voltage stabilizing circuit, and are used to pull down the bias voltage terminal of the bias current generating circuit, the gate of the twenty-fourth switch tube of the bias current generating circuit, the input terminal of the first-stage operational amplifier structure of the voltage stabilizing circuit, and the output terminal of the voltage stabilizing circuit when the power switch signal of the on-chip power supply system where the startup circuit is located is a shutdown signal.

66. An on-chip power supply system, characterized in that: include: The bias current generating circuit described in any one of claims 29 to 38, the voltage stabilizing circuit described in claims 38 to 53, and the starting circuit described in any one of claims 55 to 65, wherein the voltage stabilizing circuit is connected to the starting circuit and the bias current generating circuit, and the starting circuit is connected to the bias current generating circuit.

67. An electronic device, characterized in that: Includes the on-chip power supply system as described in claim 66.

68. A vehicle, characterized in that: An electronic device comprising the electronic device described in claim 67.

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