Reset circuit, chip and electronic device

Abstract

This application relates to a reset circuit, a chip, and an electronic device. The reset circuit is connected to a signal processing circuit and includes: a trigger, a signal detection module, and a voltage regulator module. The voltage regulator module includes at least one first electronic component, and the voltage of the voltage regulator module during operation is a constant voltage, the magnitude of which is related to the number and size of the at least one first electronic component. The voltage regulator module is connected to the first input terminal of the trigger and is used to use the constant voltage as the power supply voltage of the trigger. The signal detection module is connected to the second input terminal of the trigger and is used to use the detected voltage in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered on and / or powered off. The trigger is used to output a reset signal to the signal processing circuit according to the input voltage and the trigger's threshold voltage. Using this reset circuit ensures the operating performance of subsequent circuits that use a reset signal for reset.

Description

Technical Field

[0001] This application relates to the field of signal control technology, and in particular to a reset circuit, chip, and electronic device. Background Technology

[0002] Resetting generally refers to using a reset signal to restore subsequent circuits to their initial state so that they can function normally. Resets typically fall into two categories: power-on reset and power-down reset. Power-on reset involves keeping the reset signal active during circuit power-on until the power supply voltage reaches a steady-state value where all components in the circuit can operate normally. Power-down reset occurs when a sudden and significant drop in power supply voltage occurs during normal circuit operation. It keeps the reset signal active to prevent system malfunctions due to power loss, and disables the reset signal when the power supply voltage returns to its original state. Therefore, generating a stable reset signal is essential.

[0003] In related technologies, a reset signal is generally generated by a reset circuit. This reset circuit may include a reference current source unit, a current mirror unit, and a trigger unit connected in sequence. Specifically, a voltage that increases slowly over time can be obtained by using the reference current source unit, the current mirror unit, and a capacitor. This voltage is shaped by the trigger unit to finally obtain the reset signal.

[0004] However, the reset time of the reset signal obtained in the above reset circuit is uncontrollable, which will affect the working performance of subsequent circuits that use the reset signal for reset. Summary of the Invention

[0005] Therefore, it is necessary to provide a reset circuit, chip, and electronic device that can guarantee the working performance of subsequent circuits that use a reset signal for reset, in order to address the above-mentioned technical problems.

[0006] In a first aspect, this application provides a reset circuit connected to a signal processing circuit, the reset circuit comprising: a trigger, a signal detection module, and a voltage regulator module;

[0007] The voltage regulator module includes at least one first electronic component. The voltage of the voltage regulator module during operation is a constant voltage, and the magnitude of the constant voltage is related to the number and size of the at least one first electronic component. The voltage regulator module is connected to the first input terminal of the trigger and is used to use the constant voltage as the power supply voltage of the trigger.

[0008] The aforementioned signal detection module is connected to the second input terminal of the trigger and is used to use the detected voltage in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered on and / or powered off.

[0009] The aforementioned trigger is used to output a reset signal to the signal processing circuit based on the input voltage and the trigger's threshold voltage.

[0010] In one embodiment, the reset circuit further includes a second electronic component and a power module, wherein the voltage regulator module and the second electronic component are connected in series to form a series circuit;

[0011] The aforementioned power modules are connected to the series circuit and the signal detection module respectively, providing power to the series circuit and the signal detection module and supplying power voltage respectively;

[0012] One end of the second electronic component is connected to the input terminal of the voltage regulator module, and the other end of the second electronic component is connected to the power supply module. The second electronic component is used to carry the voltage difference between the power supply voltage and the constant voltage.

[0013] In one embodiment, the first electronic component includes at least one of a diode and a bipolar junction transistor.

[0014] In one embodiment, the second electronic component includes at least one of a resistor, a P-type power supply, and a capacitor.

[0015] In one embodiment, the signal detection module includes a power-on signal detection module and / or a power-off signal detection module;

[0016] The aforementioned power-on signal detection module is used to use the voltage detected in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered on.

[0017] The aforementioned power failure signal detection module is used to use the voltage detected in the reset circuit as the input voltage of the trigger when the signal processing circuit loses power.

[0018] In one embodiment, the power-on signal detection module includes a current generator and a third electronic component connected to each other;

[0019] The bias voltage input terminal of the aforementioned current generator is connected to the input terminal of the voltage regulator module, and is used to use a constant voltage as the bias voltage of the current generator;

[0020] The end of the aforementioned third electronic component connected to the current generator is also connected to the trigger, and is used to use the voltage division on the third electronic component as the input voltage of the trigger.

[0021] In one embodiment, the third electronic component is a capacitor.

[0022] In one embodiment, the reset time corresponding to the reset signal is related to at least one of the size of the trigger, the current value output by the current generator, and the attribute value of the third electronic component.

[0023] Secondly, this application also provides a chip, including a signal processing circuit and the aforementioned reset circuit;

[0024] The aforementioned reset circuit is connected to the signal processing circuit and is used to provide a reset signal to the signal processing circuit.

[0025] Thirdly, this application also provides an electronic device, including the aforementioned chip.

[0026] The aforementioned reset circuit, chip, and electronic device, wherein the reset circuit is connected to the signal processing circuit, includes a trigger, a signal detection module, and a voltage regulator module including at least one first electronic component. The voltage regulator module operates at a constant voltage and is connected to the first input terminal of the trigger, providing the constant voltage as the trigger's power supply voltage. The signal detection module is connected to the second input terminal of the trigger and uses the detected voltage in the reset circuit as the trigger's input voltage when the signal processing circuit is powered on or off. The trigger outputs a reset signal to the signal processing circuit based on the input voltage and the trigger's threshold voltage. The magnitude of the constant voltage is related to the number and size of the at least one first electronic component. In this reset circuit, since the trigger is powered by a constant voltage, the trigger's threshold voltage is constant. Therefore, the reset signal output after processing the trigger's input voltage and threshold voltage is stable. A stable reset signal means a stable and controllable reset time, thus not affecting the performance of the subsequent signal processing circuit. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the reset circuit in one embodiment;

[0028] Figure 2 This is a schematic diagram of the reset circuit in another embodiment;

[0029] Figure 3 This is a schematic diagram of the reset circuit in another embodiment;

[0030] Figure 4 This is a schematic diagram of the reset circuit in another embodiment;

[0031] Figure 5 This is a schematic diagram of the reset circuit in another embodiment;

[0032] Figure 6 This is a schematic diagram illustrating an example of the operation of the reset circuit in another embodiment;

[0033] Figure 7 This is a schematic diagram of the reset circuit in another embodiment;

[0034] Figure 8 This is a schematic diagram of the reset circuit in another embodiment;

[0035] Figure 9 This is a schematic diagram of the chip structure in another embodiment. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing this application and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "first position" and "second position" refer to two different positions.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] Figure 1 This is a schematic diagram of the structure of a reset signal provided in one embodiment. See also... Figure 1 As shown, the reset circuit is connected to the signal processing circuit and includes a trigger, a signal detection module, and a voltage regulator module. The voltage regulator module includes at least one first electronic component. The voltage of the voltage regulator module during operation is a constant voltage, and the magnitude of the constant voltage is related to the number and size of the at least one first electronic component. The voltage regulator module is connected to the first input terminal of the trigger and is used to use the constant voltage as the power supply voltage of the trigger. The signal detection module is connected to the second input terminal of the trigger and is used to use the detected voltage in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered on and / or powered off. The trigger is used to output a reset signal to the signal processing circuit according to the input voltage and the threshold voltage of the trigger.

[0040] The signal processing circuit can be a subsequent DSP (Digital Signal Processing) circuit, FPGA (Field Programmable Gate Array) circuit, etc. The reset circuit can be connected to the signal processing circuit by means of leads or soldering, or the reset circuit can also be part of the signal processing circuit and directly soldered onto the circuit board where the signal processing circuit is located.

[0041] For a voltage regulator module, its input terminal can be connected to the first input terminal of a trigger, and its output terminal can be grounded. The voltage regulator module can include one or more first electronic components; these first electronic components can be any electronic component whose voltage is stable and constant during operation, meaning the first electronic component is either energized or conducting. The magnitude of the stable and constant voltage on each first electronic component can be set according to its properties, for example, it could be 0.7V-5V. Furthermore, if there is only one first electronic component, the stable and constant voltage on that single first electronic component is the constant voltage of the voltage regulator module. If there are multiple first electronic components, these components can be identical or different; correspondingly, the stable and constant voltage on each first electronic component can be equal or unequal. Meanwhile, multiple first electronic components can be connected in series. The input terminal of the first first electronic component can be connected to the power supply voltage or the previous circuit, etc., as long as the input terminal of the first electronic component can obtain voltage. The output terminal of the last first electronic component is grounded, and the intermediate first electronic components can be connected in series sequentially. The voltage of each first electronic component is stable and constant during operation. Therefore, the sum of the stable and constant voltages on all the first electronic components constitutes the constant voltage that all the first electronic components (i.e., the voltage regulator module) can provide to other devices. That is to say, the magnitude of the constant voltage is related to the number of first electronic components. Generally speaking, the more first electronic components, the larger the constant voltage. The relationship between the size of different first electronic components and the constant voltage can be set according to the different first electronic components. For example, the larger the size of the first electronic component, the larger the constant voltage, or the smaller the size of the first electronic component, the larger the constant voltage.

[0042] As an optional embodiment, the first electronic component may include at least one of a diode and a bipolar junction transistor (BJT). The diode may be a silicon diode with a forward voltage drop of approximately 0.7V. For low-voltage signal processing circuits, a silicon diode can be used for voltage regulation, achieving low-cost reset. Furthermore, using diodes, BJTs, etc., as the first electronic component can ensure a constant output voltage to the trigger of the reset circuit while saving the overall cost of the reset circuit.

[0043] The signal detection module in the reset circuit can be connected to the power supply voltage or directly to the signal processing circuit. It can detect the electrical signal in the signal processing circuit when the signal processing circuit is powered on or off, and determine whether the signal processing circuit is in a power-on or power-off state. Then, the voltage in the reset circuit can be detected, and the detected voltage can be used as the input voltage of the trigger, which is transmitted to the trigger through the second input terminal of the trigger.

[0044] The first input terminal of the trigger can be connected to the input terminal of the voltage regulator module, specifically to the input terminal of the first electronic component in the voltage regulator module. This allows the constant voltage generated by the voltage regulator module to be used as the power supply voltage for the trigger. Alternatively, the trigger can be a Schmitt trigger, which includes a power supply voltage, an input voltage, and a threshold voltage. The power supply voltage powers the trigger. The input voltage can be the voltage detected by the signal detection circuit in the reset circuit. The threshold voltage can be a voltage determined by the trigger based on the power supply voltage (i.e., a constant voltage). It can include one threshold voltage, two threshold voltages (a high threshold voltage and a low threshold voltage), or multiple threshold voltages. After obtaining the input voltage and threshold voltage, the trigger compares the input voltage and the threshold voltage to obtain a comparison result, and then controls the trigger to output a reset signal (RESET) based on the comparison result.

[0045] For example, during the power-on process of the signal processing circuit, the reset signal of the trigger remains in an active open state. If the input voltage obtained by the trigger is greater than or equal to the high threshold voltage of the threshold voltage, the trigger can switch the reset signal from the open state to the closed state, that is, the output reset signal is high; or when the signal processing circuit is powered off, if the input voltage of the trigger drops to less than or equal to the low threshold voltage of the threshold voltage, the trigger can switch the reset signal from the closed state to the open state, that is, the output reset signal is low. This can avoid damaging the components of the signal processing circuit.

[0046] As described above, the power supply voltage of the trigger is provided by at least one first electronic component, and the threshold voltage of the trigger is generally determined by the power supply voltage. Under normal circumstances, changes in the power supply voltage will cause instability in the threshold voltage, leading to significant variations in the duration of the reset signal output by the trigger. Furthermore, when a power failure occurs, the low threshold voltage of the trigger cannot be determined. Therefore, there are cases where the trigger outputs a reset signal before the power supply voltage drops to the system's minimum operating voltage, and cases where the power supply voltage has dropped to the system's operating voltage but a reset signal has not yet been output. Therefore, using a constant voltage generated by at least one first electronic component as the power supply voltage of the trigger ensures that the threshold voltage of the trigger becomes a stable threshold voltage, preventing significant changes. Thus, the result of comparing the input voltage and the threshold voltage is determined, and the control of the reset signal is also determined and stable. Therefore, the reset duration of the reset signal is stable and controllable, thus avoiding the problem of unstable reset time affecting the performance of subsequent signal processing circuits.

[0047] The aforementioned reset circuit, connected to the signal processing circuit, includes a trigger, a signal detection module, and a voltage regulator module comprising at least one first electronic component. The voltage regulator module operates at a constant voltage and is connected to the first input terminal of the trigger, providing the constant voltage as the trigger's power supply voltage. The signal detection module is connected to the second input terminal of the trigger and, when the signal processing circuit is powered on or off, uses the detected voltage in the reset circuit as the trigger's input voltage. The trigger outputs a reset signal to the signal processing circuit based on the input voltage and its threshold voltage. The magnitude of the constant voltage is related to the number and size of the at least one first electronic component. In this reset circuit, since the trigger is powered by a constant voltage, its threshold voltage is also constant. Therefore, the reset signal output after processing the input voltage and threshold voltage of the trigger is stable. A stable reset signal results in a stable and controllable reset time, thus not affecting the performance of the subsequent signal processing circuit.

[0048] Figure 2 This is a schematic diagram of the structure of a reset signal provided in another embodiment. See also... Figure 2 As shown, the reset circuit also includes a second electronic component and a power supply module. The voltage regulator module and the second electronic component are connected in series to form a series circuit. The power supply module is connected to the series circuit and the signal detection module respectively, providing power to the series circuit and the signal detection module and providing power supply voltage. One end of the second electronic component is connected to the input terminal of the voltage regulator module, and the other end of the second electronic component is connected to the power supply module. The second electronic component is used to carry the voltage difference between the power supply voltage and the constant voltage.

[0049] The power supply module can be the power supply voltage for the subsequent signal processing circuit. It can be connected to the input terminal of the signal detection module to supply power to the signal detection module. It can also be connected to the loop formed by the second electronic component and the first electronic component in series to supply power to the loop, so that the first electronic component can work after receiving voltage.

[0050] Different power modules have different power supply voltages, meaning the reset circuit can support different power supply voltage ranges. Therefore, by incorporating different numbers of first electronic components in the reset circuit, different constant voltages can be generated, thus achieving different power supply voltage ranges. As an optional embodiment, the power supply voltage range in this example is 0.98V-1.98V. This relatively wide power supply voltage range allows for signal detection of the power supply voltage of the broadband power module.

[0051] In addition, the second electronic component is connected in series with the voltage regulator module. One end of the second electronic component can be connected to the power supply module, and the other end can be connected to the input terminal of the voltage regulator module. Specifically, it can be connected to the input terminal of the first electronic component in the voltage regulator module, so that the second electronic component can bear the voltage difference between the power supply voltage of the power supply module and the input terminal of the voltage regulator module, that is, bear the voltage difference between the power supply voltage and the constant voltage. This can prevent the first electronic component from being damaged when the power supply voltage is too high.

[0052] The second electronic component may differ from the first component. As an optional embodiment, the second electronic component may include at least one of a resistor, a P-type power supply, and a capacitor. The P-type power supply may be referred to as a Native PMOS. The reason for choosing a P-type power supply as the second electronic component is that it can provide a near-zero threshold voltage, so a high gate-source voltage is not required to turn it on. This ensures that the entire reset circuit can still be turned on when the voltage difference between the input terminals of the power supply module and the voltage regulator module is close to 0, thus ensuring the normal operation of the reset circuit.

[0053] In this embodiment, the reset circuit also includes a second electronic component and a power supply module. The power supply module can be connected to the signal detection module or to the series circuit formed by the second electronic component and the voltage regulator module to supply power to the signal detection module and the series circuit, so that both the signal detection module and the series circuit can work normally. In addition, one end of the second electronic component is connected to the power supply module and the other end is connected to the input terminal of the voltage regulator module. It can be used to carry the voltage difference between the power supply voltage and the constant voltage. This can prevent the first electronic component in the voltage regulator module from being damaged when the power supply voltage is too high, improve the service life of the first electronic component in the voltage regulator module, and ensure the normal operation of the reset circuit.

[0054] Figure 3 This is a schematic diagram of the structure of a reset signal provided in another embodiment. See also... Figure 3 As shown, the signal detection module in the reset circuit includes a power-on signal detection module and / or a power-off signal detection module; the power-on signal detection module is used to use the detected voltage in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered on; the power-off signal detection module is used to use the detected voltage in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered off.

[0055] When a signal processing circuit is powered on, it typically requires a certain amount of time for its power supply voltage to reach a stable value. During this period, a reset signal is needed to define the initial state of each register and other storage unit. Therefore, during power-on, the signal processing circuit requires a specific command for initialization, namely Power On Reset (POR). The POR signal usually remains in the reset state until the power supply voltage reaches a steady-state value sufficient for all components in the signal processing circuit to function properly. Based on this, during power-on, the power-on signal detection module can detect the voltage in the reset circuit, specifically the power supply voltage of the power module. The detected voltage is then input to the flip-flop via its input voltage terminal, allowing the trigger to output a reset signal that resets the signal processing circuit.

[0056] Furthermore, during normal operation, if a transient interference occurs on the power supply module, such as excessive noise from the power supply module or a sudden drop in power supply voltage caused by excessive load current consumption, the signal processing circuit will malfunction. Therefore, when the power supply voltage drops to a certain value (i.e., during a power outage period), a reset signal, specifically a Brown Out Reset (BOR) signal, is required. When the power supply returns to its original state, the BOR signal should return to zero. Based on this, during the power outage period of the signal processing circuit, the power outage signal detection module can detect the voltage in the reset circuit, i.e., detect the power supply voltage of the power supply module, and input the detected voltage to the input voltage terminal of the trigger. The reset signal output by the trigger will then reset the signal processing circuit.

[0057] In this embodiment, the signal detection module of the reset circuit includes a power-on signal detection module and a power-off signal detection module. When the signal processing circuit is powered on or off, the corresponding power-on signal detection module or power-off signal detection module can use the detected voltage in the reset circuit as the input voltage of the trigger, so that the trigger can quickly and accurately output the reset signal through the input voltage, thereby improving the working efficiency of the reset circuit.

[0058] For the power-on detection module mentioned above, see Figure 4 The circuit structure diagram shown is an optional embodiment. The power-on signal detection module includes a current generator and a third electronic component that are connected to each other. The bias voltage input terminal of the current generator is connected to the input terminal of the voltage regulator module, and is used to use a constant voltage as the bias voltage of the current generator. The end of the third electronic component connected to the current generator is also connected to a trigger, and is used to use the voltage division on the third electronic component as the input voltage of the trigger.

[0059] The bias voltage input terminal of the current generator is connected to the input terminal of the voltage regulator module. This allows the constant voltage generated by all the first electronic components in the voltage regulator module to be used as the bias voltage of the current generator, enabling it to operate normally after being biased by the bias voltage. This biasing method avoids the problem of the current generator being greatly affected by changes in the power supply voltage when it is biased by self-biasing (i.e., biasing the current by the power supply voltage collected by the current generator), thus ensuring that the current generator can operate normally.

[0060] In addition, for the third electronic component connected to the current generator, it is generally required that the voltage on the third electronic component does not change abruptly. Therefore, as an optional embodiment, the third electronic component is a capacitor. This can ensure that the voltage on the third electronic component does not change abruptly, so that the current generator can work normally, and at the same time, it can save the cost of the power-on signal detection module and the reset circuit.

[0061] As for the connection method of the third electronic component, one end of the third electronic component can be connected to the current generator and the other end grounded. In this way, during the normal operation of the reset circuit, a voltage divider will be generated on the third electronic component. This voltage divider can be used as the input voltage of the trigger for the subsequent trigger reset signal output.

[0062] In this embodiment, the power-on signal detection module of the reset circuit includes a current generator and a third electronic component connected to each other. The bias voltage of the current generator can be a constant voltage generated by the voltage regulator module, and the voltage divider on the third electronic component can be used as the input voltage of the trigger. This ensures that the output voltage of the current generator and the voltage divider on the third electronic component will not change abruptly. Therefore, the voltage input to the trigger through the voltage divider will not change abruptly, and the reset signal output by the trigger will be relatively stable, and the reset time will be stable and controllable.

[0063] The following embodiments illustrate the reset time of the reset signal mentioned above. In another embodiment, the reset time corresponding to the reset signal is related to at least one of the following: the size of the trigger, the current value output by the current generator, and the attribute value of the third electronic component.

[0064] Taking a capacitor as an example, the attribute value of this third electronic component can be its capacitance value. In other words, the reset time of the trigger's output reset signal is affected by the size of the trigger, the current value output by the current generator, the attribute value of the third electronic component, or any two or all of these three factors. Changing the size of the trigger, the current value output by the current generator, or the attribute value of the third electronic component may all cause a change in the reset time of the trigger's output reset signal. Therefore, the aforementioned settings—a constant bias voltage for the current generator, a voltage divider on the third electronic component that does not change abruptly, and a constant supply voltage for the trigger—maximize the controllability of the trigger's output reset signal, ensuring a controllable and stable reset signal with a consistently stable and controllable reset time.

[0065] In addition, the reset time here can be in the millisecond range. Such a long reset time can facilitate the reset of large signal processing circuits, so as to ensure that the performance of large signal processing circuits is not affected as much as possible.

[0066] In this embodiment, the reset time corresponding to the reset signal is related to at least one of the size of the flip-flop, the current value output by the current generator, and the attribute value of the third electronic component. This can maximize the controllability of the reset signal output by the flip-flop, so that the flip-flop outputs a controllable and stable reset signal and a continuously stable and controllable reset time, so as to ensure that the performance of the subsequent signal processing circuit is not affected.

[0067] The following provides a specific example of the reset circuit's operation. (See attached image.) Figure 5 The schematic diagram of the reset circuit shown indicates that the voltage regulator module contains two first electronic components, both of which are diodes; the second electronic component is a resistor R; and the third electronic component is a capacitor C. Simultaneously, combined with... Figure 6 The following diagram illustrates the changes in power supply voltage, input voltage of the trigger, and reset signal output by the trigger.

[0068] The constant voltage vdds generated on the two diodes (D1 and D2 in the figure) serves as the power supply voltage for the trigger and as the bias voltage for the current generator. The VDD power supply voltage output by the power module is simultaneously output to the current generator, the power-down signal detection module, and the resistor in the series circuit. The voltage divider VA on the capacitor C serves as the input voltage for the trigger. After comparing the input voltage with the threshold voltage, the trigger outputs a reset signal RESET.

[0069] During the operation of the reset circuit, as the power supply voltage VDD rises from 0V to VDD, when the power supply voltage reaches the turn-on voltage of the current generator, VA (the voltage divided by the capacitor, i.e., the input voltage of the trigger) begins to increase slowly. Previously, the reset signal remained active. When VA reaches the high threshold voltage of the trigger, the trigger switches the reset signal to the off state. When the reset circuit is operating normally, if the power supply voltage suddenly drops below the voltage threshold VLT (generally, the system cannot operate normally when the power supply voltage is below VLT), the capacitor discharges rapidly. When the voltage divided by the capacitor VA falls below the low threshold voltage of the trigger, the reset signal is turned on. When the power supply voltage returns to normal, the capacitor slowly charges again, causing the voltage divided by VA to increase slowly, and simultaneously switching the reset signal to the off state.

[0070] The following are schematic diagrams of two possible implementations of the reset circuit. See [link / reference] Figure 7 The diagram shows a reset circuit, in which the first electronic component in the voltage regulator module is a diode D1, the second electronic component is a resistor R, and the third electronic component is a capacitor C. (See also...) Figure 8 The diagram shows a reset circuit, in which the voltage regulator module has only one first electronic component, which is a diode D1; the second electronic component is a P-type dissipative diode (Native PMOS); and the third electronic component is a capacitor C. Both of these reset circuits can achieve the reset function of the signal processing circuit.

[0071] Based on the same inventive concept, this application also provides a chip, see [link to relevant documentation]. Figure 9 As shown, the chip includes a signal processing circuit and the aforementioned reset circuit. The reset circuit is connected to the signal processing circuit and is used to provide a reset signal to the signal processing circuit.

[0072] In this embodiment, the chip includes an interconnected signal processing circuit and a reset circuit. The reset circuit provides a reset signal to the signal processing circuit. The reset circuit includes a trigger, a signal detection module, and a voltage regulator module including at least one first electronic component. The voltage regulator module operates at a constant voltage and is connected to the first input terminal of the trigger, providing the constant voltage as the power supply voltage for the trigger. The signal detection module is connected to the second input terminal of the trigger and uses the detected voltage in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered on or off. The trigger outputs a reset signal to the signal processing circuit based on the input voltage and the trigger's threshold voltage. The magnitude of the constant voltage is related to the number and size of the at least one first electronic component. In this chip, since the trigger is powered by a constant voltage, the trigger's threshold voltage is constant. Therefore, the reset signal output after processing the input voltage and threshold voltage of the trigger is stable. A stable reset signal means a stable and controllable reset time, thus not affecting the performance of the subsequent signal processing circuit.

[0073] Based on the same inventive concept, this application also provides an electronic device, which includes the chip described above.

[0074] In this embodiment, the electronic device may include a chip, which includes an interconnected signal processing circuit and a reset circuit. The reset circuit provides a reset signal to the signal processing circuit. The reset circuit includes a trigger, a signal detection module, and a voltage regulator module including at least one first electronic component. The voltage regulator module operates at a constant voltage and is connected to the first input terminal of the trigger, used to provide the constant voltage as the power supply voltage for the trigger. The signal detection module is connected to the second input terminal of the trigger and is used to provide the detected voltage in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered on or off. The trigger outputs a reset signal to the signal processing circuit based on the input voltage and the trigger's threshold voltage. The magnitude of the constant voltage is related to the number and size of the at least one first electronic component. In this electronic device, since the trigger is powered by a constant voltage, the trigger's threshold voltage is constant. Thus, the reset signal output after processing the input voltage and threshold voltage of the trigger is stable. A stable reset signal means a stable and controllable reset time, which does not affect the performance of the subsequent signal processing circuit.

[0075] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above 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.

[0076] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A reset circuit, characterized by comprising: The reset circuit, connected to the signal processing circuit, includes: a trigger, a signal detection module, and a voltage regulator module; The voltage regulator module includes at least one first electronic component. The voltage of the voltage regulator module is a constant voltage when it is working, and the magnitude of the constant voltage is related to the number and size of the at least one first electronic component. The voltage regulator module is connected to the first input terminal of the trigger and is used to use the constant voltage as the power supply voltage of the trigger. The first electronic component is an electronic component whose voltage is stable and unchanged when it is energized or conducting. The signal detection module is connected to the second input terminal of the trigger and is used to use the detected voltage in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered on and / or powered off. The trigger is used to output a reset signal to the signal processing circuit based on the input voltage and the threshold voltage of the trigger; the threshold voltage is determined based on the supply voltage. The signal detection module includes a power-on signal detection module; The power-on signal detection module includes a current generator and a third electronic component that are interconnected. The bias voltage input terminal of the current generator is connected to the input terminal of the voltage regulator module, and is used to use the constant voltage as the bias voltage of the current generator; One end of the third electronic component connected to the current generator is also connected to the trigger, and is used to use the voltage division on the third electronic component as the input voltage of the trigger.

2. The reset circuit of claim 1, wherein The reset circuit also includes a second electronic component and a power module. The voltage regulator module and the second electronic component are connected in series to form a series circuit. The power module is connected to the series circuit and the signal detection module respectively, and provides power to the series circuit and the signal detection module respectively, providing power voltage; One end of the second electronic component is connected to the input terminal of the voltage regulator module, and the other end of the second electronic component is connected to the power supply module. The second electronic component is used to carry the voltage difference between the power supply voltage and the constant voltage.

3. The reset circuit of claim 1, wherein The first electronic component includes at least one of a diode and a bipolar junction transistor.

4. The reset circuit of claim 2, wherein, The second electronic component includes at least one of a resistor, a P-type power supply, and a capacitor.

5. The reset circuit according to any one of claims 2 to 4, characterized in that, The signal detection module also includes a power failure signal detection module; The power failure signal detection module is used to use the voltage detected in the reset circuit as the input voltage of the trigger when the signal processing circuit is powered off.

6. The reset circuit according to any one of claims 2 to 4, wherein The power supply voltage range is 0.98V-1.98V.

7. The reset circuit of claim 1, wherein, The third electronic component is a capacitor.

8. The reset circuit according to claim 1, characterized in that, The reset time corresponding to the reset signal is related to at least one of the size of the trigger, the current value output by the current generator, and the attribute value of the third electronic component.

9. A chip, characterized by Includes a signal processing circuit and a reset circuit as described in any one of claims 1-8; The reset circuit is connected to the signal processing circuit and is used to provide a reset signal to the signal processing circuit.

10. An electronic device, comprising: Includes the chip described in claim 9.

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