Level conversion circuit and power supply device

Abstract

The present invention relates to a level conversion circuit and a power supply device, wherein an input voltage is provided by a power supply module, a conversion module connected to the power supply module converts the input voltage on a plurality of different voltage domain conversion paths to output a power supply voltage signal, a control module connected to a controlled end of the conversion module controls the power-off state of each of the voltage domain conversion paths of the conversion module, generates a power-off control signal when the power-off state meets a preset state, and latches a voltage conversion signal output by the corresponding voltage domain conversion path according to the power-off control signal so that the power supply voltage signal is in a normal output state, thereby improving the reliability of the level conversion circuit when performing conversions in different voltage domains in a power-off scenario of an external power supply voltage.

Description

Technical Field

[0001] The present invention relates to the field of integrated circuits, and in particular to a level conversion circuit and a power supply device. Background Art

[0002] With the rapid growth of consumer electronic products, IC technology has entered the deep submicron era, the electronic integration is getting higher and higher, the application environment is becoming more and more complex, and chips often need to be powered by multiple voltage domains. Level conversion circuits can ensure that data can interact normally in different voltage domains. However, the existing level conversion circuits have poor circuit reliability when converting between different voltage domains in the scenario of external power supply voltage failure. Summary of the invention

[0003] Based on this, in order to solve the above problems, it is necessary to provide a level conversion circuit and a power supply device.

[0004] In order to achieve the purpose of the present invention, the present invention adopts the following technical solution:

[0005] A level conversion circuit, comprising:

[0006] A power supply module, used for providing input voltage;

[0007] A conversion module, connected to the power supply module, for converting the input voltage on a plurality of different voltage domain conversion paths to output a power supply voltage signal;

[0008] A control module is connected to the controlled end of the conversion module, and is used to monitor the power-off state of each voltage domain conversion path of the conversion module, generate a power-off control signal when the power-off state meets a preset state, and latch the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-off control signal to make the supply voltage signal in a normal output state.

[0009] In one embodiment, the conversion module includes:

[0010] A plurality of conversion units, each of the conversion units is arranged on the corresponding voltage domain conversion path, the input end of the conversion unit of the first stage is used to input the voltage, the output end of the conversion unit of the last stage is used to output the supply voltage signal, and the output end of the conversion unit of the previous stage is connected to the input end of the conversion unit of the adjacent next stage; wherein:

[0011] The controlled end of each conversion unit is connected to the control module, and each conversion unit is used to perform corresponding voltage domain conversion processing on the input voltage signal, and output the converted voltage signal to the conversion unit of the next stage; it is also used to stop voltage conversion when receiving the power-off control signal and latch the voltage conversion signal output at the previous moment.

[0012] In one of the embodiments, the voltage domain includes a first voltage domain, a second voltage domain, a third voltage domain, and a fourth voltage domain, and the conversion unit includes a first conversion unit, a second conversion unit, and a third conversion unit;

[0013] The first conversion unit is connected to the power supply module and is used to convert the first voltage signal in the first voltage domain into a second voltage signal in the second voltage domain and output the second voltage signal to the second conversion unit;

[0014] The second conversion unit is connected to the first conversion unit, and is used to convert the second voltage signal into a third voltage signal in the third voltage domain and output the third voltage signal to the third conversion unit;

[0015] The third conversion unit is connected to the second conversion unit, and is used to convert the third voltage signal into a fourth voltage signal in a fourth voltage domain and output the supply voltage signal.

[0016] In one embodiment, the control module includes:

[0017] A plurality of control units, each of which is disposed between two adjacent voltage domain conversion paths;

[0018] Wherein: each of the control units is used to monitor the power-off status of two adjacent voltage domain conversion paths of the conversion module; and is also used to generate a power-off control signal corresponding to the two adjacent voltage domain conversion paths when the power-off status of the two adjacent voltage domain conversion paths meets the preset power-off status, so as to control the corresponding conversion unit to stop voltage conversion and latch the voltage conversion signal of the previous moment.

[0019] In one embodiment, the control module further includes:

[0020] A voltage dividing circuit is connected to the different voltage domain conversion paths of the conversion module, and is used to perform voltage dividing processing on the voltage signals in the different voltage domain conversion paths to control the power-off state of the different voltage domain conversion paths, and output a first voltage dividing signal;

[0021] A first regulating circuit is connected to the voltage dividing circuit, and is used for performing voltage regulation processing on the first voltage dividing signal to generate a first regulating signal when the first voltage dividing signal meets a preset voltage dividing condition;

[0022] a first shaping circuit, connected to the first regulating circuit, and configured to perform shaping processing on the first regulating signal to generate a first power-off control signal when the first regulating signal meets a first preset regulating condition;

[0023] The first control unit is used to latch the voltage conversion signal output by the voltage domain conversion path corresponding to the conversion unit according to the first power-off control signal.

[0024] In one embodiment, the first regulating circuit comprises:

[0025] A first switch tube, a second switch tube, a first inverse ratio tube array, and a first trigger; wherein:

[0026] The first end of the first switch tube is connected to the voltage divider circuit, the second end of the first switch tube, the first end of the first trigger, and the first end of the first inverse ratio tube array are connected in common, the first end of the second switch tube is connected to the second end of the first trigger, the second end of the second switch tube is connected to the second end of the first inverse ratio tube array, and the third end of the second switch tube is connected to the third end of the first inverse ratio tube array.

[0027] In one embodiment, the first shaping circuit comprises:

[0028] A first inverter array, wherein the first inverter array includes a plurality of inverters, wherein a first end of each inverter is connected to a second end of a next inverter, a first end of a first inverter is connected to the first regulating circuit, and a second end of a last inverter is connected to the control module.

[0029] In one embodiment, the control module further includes:

[0030] A second regulating circuit is connected to the different voltage domain conversion paths of the conversion module and is used to perform voltage regulation processing on the voltage signals in the different voltage domain conversion paths to generate a second regulating signal;

[0031] a third regulating circuit, connected to the second regulating circuit, and configured to perform on-off regulation processing on the second regulating signal to generate a third regulating signal when the second regulating signal meets a second preset regulating condition;

[0032] a second shaping circuit, connected to the third regulating circuit, and configured to perform shaping processing on the third regulating signal to generate a second power-off control signal when the third regulating signal meets a third preset regulating condition;

[0033] The second control unit is further used to latch the voltage conversion signal output by the corresponding voltage domain conversion path of the conversion unit according to the second power-off control signal.

[0034] In one embodiment, the second regulating circuit includes:

[0035] A third switch tube, a fourth switch tube, a second inverse ratio tube array, and a second trigger; wherein:

[0036] The third end of the third switch tube, the first end of the fourth switch tube, the second end of the second inverse ratio tube array, and the first end of the second trigger are connected in common, the second end of the third switch tube is connected to the second end of the fourth switch tube, and the third end of the second trigger is connected to the third end of the fourth switch tube.

[0037] In one embodiment, the third regulating circuit includes:

[0038] a fifth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, a ninth switch tube, and a tenth switch tube; wherein:

[0039] The first end of the fifth switch tube is connected to the first end of the sixth switch tube, the third end of the sixth switch tube is connected to the second end of the seventh switch tube, the second end of the eighth switch tube is connected to the third end of the ninth switch tube, the second end of the ninth switch tube is connected to the third end of the tenth switch tube, and the first end of the ninth switch tube is connected to the first end of the tenth switch tube.

[0040] In one embodiment, the third regulating circuit further includes:

[0041] an eleventh switch tube, a twelfth switch tube, a thirteenth switch tube, a fourteenth switch tube, a fifteenth switch tube, and a sixteenth switch tube; wherein:

[0042] The third end of the eleventh switch tube is connected to the second end of the twelfth switch tube, the second end of the fifteenth switch tube is connected to the third end of the sixteenth switch tube, the third end of the twelfth switch tube, the second end of the thirteenth switch tube, and the first end of the sixteenth switch tube are connected in common, and the first end of the eleventh switch tube, the second end of the fourteenth switch tube, and the third end of the fifteenth switch tube are connected in common;

[0043] The third end of the fifth switch tube, the second end of the sixth switch tube, the first end of the twelfth switch tube, and the first end of the thirteenth switch tube are connected together; the first end of the seventh switch tube, the second end of the ninth switch tube, the third end of the tenth switch tube, the first end of the fourteenth switch tube, and the first end of the fifteenth switch tube are connected together.

[0044] In one embodiment, the second shaping circuit comprises:

[0045] A second inverter array, wherein the second inverter array comprises a plurality of inverters, wherein a first end of each inverter is connected to a second end of a next inverter, a first end of a first inverter is connected to the third regulating circuit, and a second end of a last inverter is connected to the control module.

[0046] A level conversion power supply device comprises the level conversion circuit described above.

[0047] The above-mentioned level conversion circuit provides input voltage through the power supply module, and the conversion module connected to the power supply module converts the input voltage on multiple different voltage domain conversion paths to output a power supply voltage signal. The control module connected to the controlled end of the conversion module controls the power-off state of each of the voltage domain conversion paths of the conversion module, generates a power-off control signal when the power-off state meets the preset state, and latches the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-off control signal so that the power supply voltage signal is in a normal output state, thereby improving the reliability of the level conversion circuit when performing different voltage domain conversions in the external power supply voltage power-off scenario. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 is a schematic block diagram of a level conversion circuit in one embodiment;

[0049] Figure 2 is a schematic block diagram of the structure of a conversion module in one embodiment;

[0050] Figure 3 A specific structural block diagram of a control module in an embodiment;

[0051] Figure 4 is a schematic structural diagram of a first regulating circuit in a control module in an embodiment;

[0052] Figure 5 is a schematic diagram of the specific structure of a first inverse ratio tube array in an embodiment;

[0053] Figure 6 is a schematic structural diagram of a first shaping circuit in a control module in an embodiment;

[0054] Figure 7 is a schematic diagram of the structure of a control module in one embodiment;

[0055] Figure 8 is a schematic diagram of a specific structure of a second regulating circuit in an embodiment;

[0056] Fig. 9is a schematic diagram of a specific structure of a third regulating circuit in an embodiment;

[0057] Fig.10 FIG. 4 is a schematic diagram of a specific structure of a second shaping circuit in an embodiment. DETAILED DESCRIPTION

[0058] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Preferred embodiments of the present invention are provided in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0060] See also Figure 1 , is a schematic block diagram of the structure of a level conversion circuit in an embodiment.

[0061] like Figure 1 As shown, the level conversion includes a power supply module 100 , a conversion module 200 , and a control module 300 .

[0062] The power supply module 100 is used to provide input voltage.

[0063] The conversion module 200 is connected to the power supply module 100 and is used to convert the input voltage on a plurality of different voltage domain conversion paths to output a power supply voltage signal.

[0064] The control module 300 is connected to the controlled end of the conversion module 200, and is used to control the power-off state of each voltage domain conversion path of the conversion module 200, generate a power-off control signal when the power-off state meets the preset state, and latch the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-off control signal to make the supply voltage signal in a normal output state.

[0065] Among them, the power supply module 100 provides an input voltage and transmits the input voltage to the conversion module 200. The conversion module 200 converts the input voltage on multiple different voltage domain conversion paths to output a power supply voltage signal, and the control module 300 monitors the power-off state of each voltage domain conversion path of the conversion module 200, generates a power-off control signal when the power-off state meets the preset state, and latches the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-off control signal to make the power supply voltage signal in a normal output state.

[0066] Optionally, the method of connecting the control module 300 to the controlled end of the conversion module 200 may be to construct a connection path between the control module 300 and the conversion module by adding an additional switch tube or a transmission gate.

[0067] The level conversion circuit in this embodiment provides input voltage through the power supply module 100, and the conversion module 200 connected to the power supply module 100 converts the input voltage on multiple different voltage domain conversion paths to output a power supply voltage signal. The control module 300 connected to the controlled end of the conversion module 200 controls the power-off state of each voltage domain conversion path of the conversion module, generates a power-off control signal when the power-off state meets the preset state, and latches the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-off control signal to make the power supply voltage signal in a normal output state, thereby improving the reliability of the level conversion circuit when performing different voltage domain conversions in the external power supply voltage power-off scenario.

[0068] In one embodiment, the conversion module includes multiple conversion units, wherein the input end of the first-level conversion unit is used for input voltage, the output end of the last-level conversion unit is used for outputting a power supply voltage signal, and the output end of the previous-level conversion unit is connected to the input end of the adjacent next-level conversion unit.

[0069] Among them, the controlled end of each conversion unit is connected to the control module, and each conversion unit is used to perform corresponding voltage domain conversion processing on the input voltage signal, and output the converted voltage signal to the next-level conversion unit; it can also be used to stop voltage conversion and latch the voltage conversion signal output at the previous moment when receiving a power-off control signal.

[0070] Optionally, the conversion module includes a first conversion unit, i.e., a conversion unit of the first level, a second conversion unit, i.e., a conversion unit of the second level, and a third conversion unit, i.e., a conversion unit of the third level. The three conversion units are connected in sequence, the input end of the conversion unit of the first level is used to access the input voltage provided by the external power supply, the output end of the conversion unit of the third level is used to output the power supply voltage signal, the output end of the conversion unit of the first level is connected to the input end of the adjacent conversion unit of the second level, and the output end of the conversion unit of the second level is connected to the input end of the adjacent conversion unit of the third level.

[0071] See also Figure 2 , is a schematic block diagram of the structure of a conversion module in an embodiment.

[0072] like Figure 2 As shown, in this embodiment, the voltage domains include a first voltage domain, a second voltage domain, a third voltage domain, and a fourth voltage domain, and the conversion units of the conversion module specifically include a first conversion unit 210 , a second conversion unit 220 , and a third conversion unit 230 .

[0073] The first conversion unit 210 is connected to the power supply module, and is used for converting a first voltage signal in the first voltage domain into a second voltage signal in the first voltage domain, and outputting the second voltage signal to an input end of the second conversion unit 220 .

[0074] The second conversion unit 220 is connected to the first conversion unit 210 , and is configured to convert the second voltage signal into a third voltage signal in a third voltage domain, and output the third voltage signal to an input end of the third conversion unit 230 .

[0075] The third conversion unit 230 is connected to the second conversion unit 220, and is used to convert the third voltage signal into a fourth voltage signal in a fourth voltage domain, and output a supply voltage signal.

[0076] Optionally, the first voltage domain may be a 1.5V to 0V voltage domain, the second voltage domain may be a 5.6V to 0V voltage domain, the third voltage domain may be a 5.6V to -12V voltage domain, and the fourth voltage domain may be a 12V to -12V voltage domain; during the level conversion process, the first conversion unit 210 may convert the voltage signal from the 1.5V to 0V voltage domain to the 5.6V to 0V voltage domain, the second conversion unit 220 may convert the voltage signal from the 5.6V to 0V voltage domain to the 5.6V to -12V voltage domain, and the third conversion unit may convert the voltage signal from the 5.6V to -12V voltage domain to the 12V to -12V voltage domain.

[0077] In one embodiment, the control module includes a plurality of control units, each of which is disposed between two adjacent voltage domain conversion paths. Each control unit is used to detect the power-off state of two adjacent voltage domain conversion paths of the conversion module, and is also used to generate a power-off control signal corresponding to the two adjacent voltage domain conversion paths when the power-off state of the two adjacent voltage domain conversion paths meets a preset power-off state, so as to control the corresponding conversion unit to stop voltage conversion and latch the voltage conversion signal output at the previous moment.

[0078] Optionally, the power-off state of two adjacent voltage domain conversion paths meets the preset power-off state, which may be a sudden power-off phenomenon between the two adjacent voltage domain conversion paths, that is, there is no voltage signal between the two adjacent voltage domain conversion paths, or a sudden drop in the amplitude of the voltage signal between the two adjacent voltage domain conversion paths exceeds 50%.

[0079] For example, during the voltage conversion process in which the second conversion unit converts the second voltage signal of the second voltage domain into the third voltage signal of the third voltage domain, assuming that the conversion path between the second voltage domain and the third voltage domain suddenly loses power, a power-off control signal corresponding to the conversion path between the second voltage domain and the third voltage domain is generated, and the power-off control signal is input to the second conversion unit to control the second conversion unit to stop voltage conversion and latch the voltage conversion signal output at the previous moment, thereby maintaining the state before power failure. When the conversion path between the second voltage domain and the third voltage domain is restored, the second conversion unit continues voltage conversion, thereby improving the reliability and accuracy of level conversion.

[0080] See also Figure 3 , which is a specific structural block diagram of a control module in an embodiment.

[0081] like Figure 3 As shown, the control module in this embodiment includes a voltage divider circuit 310 , a first regulating circuit 320 , and a first shaping circuit 330 .

[0082] The voltage divider circuit 310 is connected to different voltage domain conversion paths of the conversion module, and is used to divide the voltage signals in different voltage domain conversion paths to detect the power-off status of different voltage domain conversion paths, and output a first voltage divider signal.

[0083] The first regulating circuit 320 is connected to the voltage dividing circuit 310, and is used for performing voltage regulation processing on the first voltage dividing signal to generate a first regulating signal when the first voltage dividing signal meets a preset voltage dividing condition.

[0084] The first shaping circuit 330 is connected to the first regulating circuit 320, and is used for shaping the first regulating signal to generate a first power-off control signal when the first regulating signal meets a first preset regulating condition.

[0085] For example, during the voltage conversion process in which the first conversion unit converts the first voltage signal of the first voltage domain into the second voltage signal of the second voltage domain, assuming that the conversion path between the first voltage domain and the second voltage domain suddenly loses power, the voltage divider circuit 310 connected to the different voltage domain conversion paths of the conversion module performs voltage division processing on the voltage signals in the different voltage domain conversion paths to detect the power-off status of the different voltage domain conversion paths, and outputs a first voltage division signal. The first adjustment circuit 320 connected to the voltage divider circuit 310 performs voltage regulation processing on the first voltage division signal to generate a first regulation signal when the first voltage division signal meets a preset voltage division condition. The first shaping circuit 330 connected to the first adjustment circuit 320 performs shaping processing on the first regulation signal to generate a first power-off control signal when the first regulation signal meets a first preset regulation condition. The first control unit latches the voltage conversion signal output by the conversion path between the first voltage domain and the second voltage domain adjacent to the first conversion unit according to the first power-off control signal.

[0086] See also Figure 4 , is a schematic diagram of the structure of a first regulating circuit in a control module in an embodiment.

[0087] like Figure 4 As shown, in this embodiment, the first regulating circuit includes a first switch tube Q1, a second switch tube Q2, a first inverse ratio tube array Bm, and a first trigger T1. Among them, the first end of the first switch tube Q1 is connected to the voltage divider circuit, the second end of the first switch tube Q1, the first end of the first trigger T1, and the first end of the first inverse ratio tube array Bm are connected in common, the second end of the second switch tube Q2 is connected to the second end of the first inverse ratio tube array Bm, and the third end of the second switch tube Q2 is connected to the third end of the first inverse ratio tube array Bm.

[0088] Optionally, the first inverse ratio tube array Bm may be composed of a plurality of inverse ratio tubes connected in series, wherein the third end of the first inverse ratio tube is connected to the first switch tube, the second end of the last inverse ratio tube is connected to the second switch tube, the first ends of each inverse ratio tube are connected in common, the second end of each inverse ratio tube is connected to the third end of one of the two adjacent inverse ratio tubes, and the third end of each inverse ratio tube is connected to the second end of the other of the two adjacent inverse ratio tubes.

[0089] See also Figure 5 , is a schematic diagram of the specific structure of the first inverse ratio tube array in an embodiment.

[0090] like Figure 5As shown, in this embodiment, the first inverse ratio tube array includes a first inverse ratio tube B1, a second inverse ratio tube B2, a third inverse ratio tube B3, and a fourth inverse ratio tube B4. Among them, the first end of the first inverse ratio tube B1, the first end of the second inverse ratio tube B2, the first end of the third inverse ratio tube B3, and the first end of the fourth inverse ratio tube B4 are connected together, the second end of the first inverse ratio tube B1 is connected to the third end of the second inverse ratio tube B2, the third end of the second inverse ratio tube B2 is connected to the second end of the third inverse ratio tube B3, and the third end of the third inverse ratio tube B3 is connected to the second end of the fourth inverse ratio tube B4.

[0091] See also Figure 6 , is a schematic diagram of the structure of a first shaping circuit in a control module in an embodiment.

[0092] like Figure 6 As shown, in this embodiment, the first shaping circuit includes a first inverter array Fm, the first inverter array Fm has a plurality of inverters, that is, a total of m inverters from f1 to fm, and optionally m is not less than 2. The first end of each inverter is connected to the second end of the next inverter, the first end of the first inverter is connected to the first regulating circuit, and the second end of the last inverter is connected to the control module.

[0093] See also Figure 7 , is a schematic diagram of the structure of a control module in an embodiment.

[0094] like Figure 7 As shown, in this embodiment, the control module includes a second regulating circuit 710 , a third regulating circuit 720 , and a second shaping circuit 730 .

[0095] The second regulating circuit 710 is connected to different voltage domain conversion paths of the conversion module, and is used to perform voltage regulation processing on the voltage signals in the different voltage domain conversion paths to generate a second regulation signal.

[0096] The third regulating circuit 720 is connected to the second regulating circuit 710, and is used for performing on-off regulation processing on the second regulating signal to generate a third regulating signal when the second regulating signal meets a second preset regulating condition.

[0097] The second shaping circuit 730 is connected to the third regulating circuit 720, and is used for shaping the third regulating signal to generate a second power-off control signal when the third regulating signal meets a third preset regulating condition.

[0098] Optionally, the voltage regulation process can be a voltage amplitude raising process; or it can be a high-low potential flip of the input signal; for example, when the input voltage is higher than the positive threshold voltage, the output is high; when the input voltage is lower than the negative threshold voltage, the output is low; when the input is between the positive and negative threshold voltages, the output does not change, that is, the threshold voltage corresponding to the output flipping from a high potential to a low potential, or from a low potential to a high potential is different. The on-off regulation process can be a switching regulation of the on-off direction of the input signal. The shaping process can be a 180-degree phase reversal of the input signal.

[0099] Optionally, the second preset adjustment condition may be that the input voltage amplitude is greater than the on-state voltage drop of the switch tube, or that the input voltage is higher than the positive threshold voltage of the trigger, or that the input voltage is lower than the negative threshold voltage of the trigger, etc.

[0100] Optionally, the third preset adjustment condition may be that the input voltage amplitude is greater than the on-state voltage drop of the switch tube.

[0101] For example, in the voltage conversion process in which the third conversion unit converts the third voltage signal of the third voltage domain into the fourth voltage signal of the fourth voltage domain, assuming that the conversion path between the third voltage domain and the fourth voltage domain is suddenly powered off, the second regulation circuit 710 connected to the different voltage domain conversion paths of the conversion module performs voltage regulation processing on the voltage signals in the different voltage domain conversion paths to generate a second regulation signal, the third regulation circuit 720 connected to the second regulation circuit 710 receives the second regulation voltage, and when the amplitude of the second regulation voltage is greater than the on-state voltage drop of the switch tube and the input voltage is higher than the positive threshold voltage of the trigger, performs on-off regulation processing on the second regulation signal to generate a third regulation signal, the second shaping circuit 730 connected to the third regulation circuit 720 receives the third regulation signal, and when the third regulation signal meets the on-state voltage drop of the switch tube in the circuit, reverses the phase of the input third regulation signal by 180 degrees to generate a second power-off control signal, and the second control unit latches the voltage conversion signal output by the conversion path between the third voltage domain and the fourth voltage domain adjacent to the third conversion unit according to the second power-off control signal.

[0102] See also Figure 8 , is a schematic diagram of the specific structure of the second regulating circuit in an embodiment.

[0103] like Figure 8As shown, in this embodiment, the second regulating circuit includes a third switch tube Q3, a fourth switch tube Q4, a second inverse ratio tube array Bn, and a second trigger T2. Among them, the third end of the third switch tube Q3, the first end of the fourth switch tube Q4, the second end of the second inverse ratio tube array Bn, and the first end of the second trigger T2 are connected in common, the second end of the third switch tube Q3 is connected to the second end of the fourth switch tube Q4, and the third end of the second trigger T2 is connected to the third end of the fourth switch tube Q4.

[0104] Optionally, the first end of the third switch tube Q3 and the first end of the fourth switch tube Q4 may be the gate of the MOS tube; the second end of the third switch tube Q3 and the second end of the fourth switch tube Q4 may be the source of the MOS tube; the third end of the third switch tube Q3 and the third end of the fourth switch tube Q4 may be the drain of the MOS tube.

[0105] See also Fig. 9 , is a schematic diagram of the specific structure of the third regulating circuit in an embodiment.

[0106] like Fig. 9 As shown, in this embodiment, the third regulating circuit includes a fifth switch tube Q5, a sixth switch tube Q6, a seventh switch tube Q7, an eighth switch tube Q8, a ninth switch tube Q9, and a tenth switch tube Q10. Among them, the first end of the fifth switch tube Q5 is connected to the first end of the sixth switch tube Q6, the third end of the sixth switch tube Q6 is connected to the second end of the seventh switch tube Q7, the second end of the eighth switch tube Q8 is connected to the third end of the ninth switch tube Q9, the second end of the ninth switch tube Q9 is connected to the third end of the tenth switch tube Q10, and the first end of the ninth switch tube Q9 is connected to the first end of the tenth switch tube Q10.

[0107] Continue reading Fig. 9 , is a schematic diagram of the specific structure of the third regulating circuit in an embodiment.

[0108] like Fig. 9 As shown, in this embodiment, the third regulating circuit includes an eleventh switch tube Q11, a twelfth switch tube Q12, a thirteenth switch tube Q13, a fourteenth switch tube Q14, a fifteenth switch tube Q15, and a sixteenth switch tube Q16. Among them, the third end of the eleventh switch tube Q11 is connected to the second end of the twelfth switch tube Q12, the second end of the fifteenth switch tube Q15 is connected to the third end of the sixteenth switch tube Q16, the third end of the twelfth switch tube Q12, the second end of the thirteenth switch tube Q13, and the first end of the sixteenth switch tube Q16 are connected in common, and the first end of the eleventh switch tube Q11, the second end of the fourteenth switch tube Q14, and the third end of the fifteenth switch tube Q15 are connected in common.

[0109] In addition, the third end of the fifth switch tube Q5, the second end of the sixth switch tube Q6, the first end of the twelfth switch tube Q12, and the first end of the thirteenth switch tube Q13 are connected together, and the first end of the seventh switch tube Q7, the second end of the ninth switch tube Q9, the third end of the tenth switch tube Q10, the first end of the fourteenth switch tube Q14, and the first end of the fifteenth switch tube Q15 are connected together.

[0110] See also Fig.10 , is a schematic diagram of the specific structure of the second shaping circuit in an embodiment.

[0111] like Fig.10 As shown, in this embodiment, the second shaping circuit includes a second inverter array Fn, and the second inverter array includes a plurality of inverters, that is, a total of n inverters from f1 to fn, and optionally n is not less than 2. The first end of each inverter is connected to the second end of the next inverter, the first end of the first inverter is connected to the third regulating circuit, and the second end of the last inverter is connected to the control module.

[0112] In one embodiment, a level conversion power supply device includes the level conversion circuit according to the above embodiment.

[0113] Optionally, the switch tube in the above embodiment includes a MOS tube; the first end of the switch tube may be a gate of the MOS tube; the second end of the switch tube may be a source of the MOS tube; and the third end of the switch tube may be a drain of the MOS tube.

[0114] Optionally, the first end of the inverter in the above embodiment may be a signal input end of the inverter; and the second end of the inverter may be a signal output end of the inverter.

[0115] Optionally, the trigger in the above embodiment includes a Schmitt trigger; the first end of the trigger may be a signal input end of the trigger; the second end of the trigger may be a signal output end of the trigger.

[0116] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0117] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A level conversion circuit, characterized in that: include: A power supply module, used for providing input voltage; A conversion module, comprising a plurality of conversion units, each of which is arranged on a corresponding voltage domain conversion path, an input end of the conversion unit of the first stage is used to input the input voltage, an output end of the conversion unit of the last stage is used to output a supply voltage signal, and an output end of the conversion unit of the previous stage is connected to an input end of the conversion unit of the next adjacent stage; a control module connected to the controlled end of the conversion module, and used to monitor the power-off state of each of the voltage domain conversion paths of the conversion module, generate a power-off control signal when the power-off state meets a preset state, and latch the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-off control signal so that the supply voltage signal is in a normal output state; The controlled end of each conversion unit is connected to the control module, and each conversion unit is used to perform a corresponding voltage domain conversion process on the input voltage signal, and output the converted voltage signal to the conversion unit of the next stage; and is also used to stop voltage conversion when receiving the power-off control signal and latch the voltage conversion signal output at the previous moment; The control module includes a plurality of control units, each of which is disposed between two adjacent voltage domain conversion paths; wherein: each of the control units is used to monitor the power-off state of the two adjacent voltage domain conversion paths of the conversion module; and is also used to generate a power-off control signal corresponding to the two adjacent voltage domain conversion paths when the power-off state of the two adjacent voltage domain conversion paths meets a preset power-off state, so as to control the corresponding conversion unit to stop voltage conversion and latch the voltage conversion signal at the previous moment; The control module also includes a voltage divider circuit, a first regulation circuit, a first shaping circuit and a first control unit; the voltage divider circuit is connected to different voltage domain conversion paths of the conversion module, and is used to perform voltage division processing on the supply voltage signal in the different voltage domain conversion paths to control the power-off state of the different voltage domain conversion paths, and output a first voltage divider signal; the first regulation circuit is connected to the voltage divider circuit, and is used to perform voltage regulation processing on the first voltage divider signal to generate a first regulation signal when the first voltage divider signal meets a preset voltage division condition; the first shaping circuit is connected to the first regulation circuit, and is used to perform shaping processing on the first regulation signal to generate a first power-off control signal when the first regulation signal meets a first preset regulation condition; the first control unit is used to latch the voltage conversion signal output by the voltage domain conversion path corresponding to the conversion unit according to the first power-off control signal.

2. The level conversion circuit according to claim 1, characterized in that: The voltage domain includes a first voltage domain, a second voltage domain, a third voltage domain, and a fourth voltage domain, and the conversion unit includes a first conversion unit, a second conversion unit, and a third conversion unit; The first conversion unit is connected to the power supply module and is used to convert the first voltage signal in the first voltage domain into a second voltage signal in the second voltage domain and output the second voltage signal to the second conversion unit; The second conversion unit is connected to the first conversion unit, and is used to convert the second voltage signal into a third voltage signal in the third voltage domain and output the third voltage signal to the third conversion unit; The third conversion unit is connected to the second conversion unit, and is used to convert the third voltage signal into a fourth voltage signal in a fourth voltage domain and output the supply voltage signal.

3. The level conversion circuit according to claim 1, characterized in that: The first regulating circuit comprises: A first switch tube, a second switch tube, a first inverse ratio tube array, and a first trigger; wherein: The first end of the first switch tube is connected to the voltage divider circuit, the second end of the first switch tube, the first end of the first trigger, and the first end of the first inverse ratio tube array are connected in common, the first end of the second switch tube is connected to the second end of the first trigger, the second end of the second switch tube is connected to the second end of the first inverse ratio tube array, and the third end of the second switch tube is connected to the third end of the first inverse ratio tube array.

4. The level conversion circuit according to claim 1, characterized in that: The first shaping circuit comprises: A first inverter array, wherein the first inverter array includes a plurality of inverters, wherein a first end of each inverter is connected to a second end of a next inverter, a first end of a first inverter is connected to the first regulating circuit, and a second end of a last inverter is connected to the control module.

5. The level conversion circuit according to claim 1, characterized in that: The control module also includes: A second regulating circuit is connected to the different voltage domain conversion paths of the conversion module and is used to perform voltage regulation processing on the voltage signals in the different voltage domain conversion paths to generate a second regulating signal; a third regulating circuit, connected to the second regulating circuit, and configured to perform on-off regulation processing on the second regulating signal to generate a third regulating signal when the second regulating signal meets a second preset regulating condition; a second shaping circuit, connected to the third regulating circuit, and configured to perform shaping processing on the third regulating signal to generate a second power-off control signal when the third regulating signal meets a third preset regulating condition; The second control unit is further used to latch the voltage conversion signal output by the corresponding voltage domain conversion path of the conversion unit according to the second power-off control signal.

6. The level conversion circuit according to claim 5, characterized in that: The second regulating circuit comprises: A third switch tube, a fourth switch tube, a second inverse ratio tube array, and a second trigger; wherein: The third end of the third switch tube, the first end of the fourth switch tube, the second end of the second inverse ratio tube array, and the first end of the second trigger are connected in common, the second end of the third switch tube is connected to the second end of the fourth switch tube, and the third end of the second trigger is connected to the third end of the fourth switch tube.

7. The level conversion circuit according to claim 5, characterized in that: The third regulating circuit comprises: a fifth switch tube, a sixth switch tube, a seventh switch tube, an eighth switch tube, a ninth switch tube, and a tenth switch tube; wherein: The first end of the fifth switch tube is connected to the first end of the sixth switch tube, the third end of the sixth switch tube is connected to the second end of the seventh switch tube, the second end of the eighth switch tube is connected to the third end of the ninth switch tube, the second end of the ninth switch tube is connected to the third end of the tenth switch tube, and the first end of the ninth switch tube is connected to the first end of the tenth switch tube.

8. The level conversion circuit according to claim 7, characterized in that: The third regulating circuit further includes: an eleventh switch tube, a twelfth switch tube, a thirteenth switch tube, a fourteenth switch tube, a fifteenth switch tube, and a sixteenth switch tube; wherein: The third end of the eleventh switch tube is connected to the second end of the twelfth switch tube, the second end of the fifteenth switch tube is connected to the third end of the sixteenth switch tube, the third end of the twelfth switch tube, the second end of the thirteenth switch tube, and the first end of the sixteenth switch tube are connected in common, and the first end of the eleventh switch tube, the second end of the fourteenth switch tube, and the third end of the fifteenth switch tube are connected in common; The third end of the fifth switch tube, the second end of the sixth switch tube, the first end of the twelfth switch tube, and the first end of the thirteenth switch tube are connected together; the first end of the seventh switch tube, the second end of the ninth switch tube, the third end of the tenth switch tube, the first end of the fourteenth switch tube, and the first end of the fifteenth switch tube are connected together.

9. The level conversion circuit according to claim 5, characterized in that: The second shaping circuit comprises: A second inverter array, wherein the second inverter array comprises a plurality of inverters, wherein a first end of each inverter is connected to a second end of a next inverter, a first end of a first inverter is connected to the third regulating circuit, and a second end of a last inverter is connected to the control module.

10. A level conversion power supply device, characterized in that: The method comprises a level conversion circuit according to any one of claims 1 to 9.

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