Level conversion circuit and electronic device

Abstract

The application provides a level conversion circuit and electronic equipment, and belongs to the technical field of electronic circuits. The circuit comprises a pull-up module, a conversion module, a first control unit and a second control unit; the first end and the second end of the pull-up module are respectively used for inputting a first working voltage, the third end of the pull-up module is connected with the first end of the first control unit, and the fourth end of the pull-up module is connected with the first end of the second control unit; the first end and the second end of the conversion module are respectively used for inputting a second working voltage, the third end of the conversion module is used for inputting a first control signal, and the fourth end of the conversion module is used for inputting a second control signal; the second end of the first control unit is connected with the fifth end of the conversion module, and the third end of the first control unit is used for inputting the second control signal; the second end of the second control unit is connected with the sixth end of the conversion module, and the third end of the second control unit is used for inputting the first control signal. The application can improve the reliability of level conversion.

Description

Technical Field

[0001] This application relates to the field of electronic circuit technology, and more specifically, to a level conversion circuit and an electronic device. Background Technology

[0002] Various electronic devices have rapidly become ubiquitous in households, and many of these devices are equipped with corresponding microcontroller units (MCUs). These MCUs typically operate in different power domains, thus requiring corresponding level conversion circuits in these electronic devices.

[0003] In related technologies, some level conversion circuits that convert low-voltage domain signals to high-voltage domain signals use multiple metal-oxide-semiconductor field-effect transistors (MOS transistors). By inputting high-voltage or low-voltage control signals to the gates of the corresponding MOS transistors in different branches, the conduction or cutoff of each MOS transistor in each branch is controlled, thereby converting the low-voltage domain to the high-voltage domain for output.

[0004] However, in the process of the control signal transitioning from low voltage to high voltage, the related technical solutions may fail to transition the output signal from low voltage to high voltage due to the simultaneous conduction of multiple MOSFETs on the same branch. Therefore, the related technical solutions suffer from unreliable level conversion. Summary of the Invention

[0005] The purpose of this application is to provide a level conversion circuit and electronic device that can improve the reliability of level conversion.

[0006] The embodiments of this application are implemented as follows:

[0007] A first aspect of this application provides a level conversion circuit, the level conversion circuit comprising: a pull-up module, a conversion module, a first control unit, and a second control unit;

[0008] The first and second ends of the pull-up module are respectively used to input the first working voltage, the third end of the pull-up module is connected to the first end of the first control unit, and the fourth end of the pull-up module is connected to the first end of the second control unit.

[0009] The first and second terminals of the conversion module are respectively used to input a second operating voltage, the third terminal of the conversion module is used to input a first control signal, and the fourth terminal of the conversion module is used to input a second control signal; the conversion module is used to control the pull-up module to output the first operating voltage to the first control unit or the second control unit;

[0010] The second terminal of the first control unit is connected to the fifth terminal of the conversion module, and the third terminal of the first control unit is used to input the second control signal; the first control unit is used to conduct under the action of the second control signal and the first operating voltage.

[0011] The second terminal of the second control unit is connected to the sixth terminal of the conversion module, and the third terminal of the second control unit is used to input the first control signal; the second terminal of the second control unit is also used as the output node of the level conversion circuit.

[0012] The second control unit is used to turn on under the action of the first control signal and the first operating voltage, and to output a target level through the output node when turned on; the first control unit and the second control unit are specifically used to reduce the pull-up capability of the pull-up module.

[0013] Optionally, the first control unit is a first switching transistor, and the second control unit is a second switching transistor;

[0014] The source of the first switching transistor is connected to the third terminal of the pull-up module, the drain of the first switching transistor is connected to the fifth terminal of the conversion module, and the gate of the first switching transistor is used to input the second control signal.

[0015] The source of the second switch is connected to the fourth terminal of the pull-up module, the drain of the second switch is connected to the sixth terminal of the conversion module, and the gate of the second switch is used to input the first control signal.

[0016] Optionally, the conversion module includes a third switch and a fourth switch;

[0017] The gate of the third switch is used to input the second operating voltage, the source of the third switch is used to input the first control signal, and the drain of the third switch is connected to the second terminal of the first control unit; the third switch is used to turn on when the first control signal meets the first preset voltage and turn off when the first control signal meets the second preset voltage.

[0018] The gate of the fourth switch is used to input the second operating voltage, the source of the fourth switch is used to input the second control signal, and the drain of the fourth switch is connected to the second terminal of the second control unit; the fourth switch is used to turn on when the second control signal meets the first preset voltage and to turn off when the first control signal meets the second preset voltage.

[0019] The first preset voltage is less than the second preset voltage.

[0020] Optionally, the pull-up module includes a fifth switch and a sixth switch;

[0021] The source of the fifth switch is used to input the first operating voltage, the drain of the fifth switch is connected to the first terminal of the first control unit, and the gate of the fifth switch is connected to the second terminal of the second control unit and the drain of the fourth switch, respectively. The fifth switch is used to turn off when the fourth switch is off and turn on when the fourth switch is on to output the first operating voltage to the first control unit.

[0022] The source of the sixth switch is used to input the first operating voltage, the drain of the sixth switch is connected to the first terminal of the second control unit, and the gate of the sixth switch is connected to the second terminal of the first control unit and the drain of the third switch, respectively. The sixth switch is used to turn off when the third switch is off and turn on when the third switch is on to output the first operating voltage to the first control unit.

[0023] Optionally, the level conversion circuit further includes: a level adjustment module;

[0024] The first terminal of the level adjustment module is used to input an initial level signal, the second terminal of the level adjustment module is connected to the third terminal of the conversion module, and the third terminal of the level adjustment module is connected to the fourth terminal of the conversion module.

[0025] The level adjustment module is used to convert the initial level signal into the second control signal and the first control signal, and output the second control signal and the first control signal to the conversion module respectively.

[0026] Optionally, the level adjustment module includes: a first inverter and a second inverter; the input terminal of the first inverter is used to input the initial level signal, the first power supply terminal of the first inverter is used to input the second operating voltage, the second power supply terminal of the first inverter is grounded, and the output terminal of the first inverter is connected to the conversion module and the input terminal of the second inverter respectively; the first inverter is used to convert the initial level signal into the first control signal;

[0027] The first power supply terminal of the second inverter is used to input the second operating voltage, the second power supply terminal of the second inverter is grounded, and the output terminal of the second inverter is connected to the conversion module; the second inverter is used to convert the first control signal into the second control signal.

[0028] Optionally, the level adjustment module includes: a third inverter;

[0029] The input terminal of the third inverter is used to input the initial level signal, the first power supply terminal of the third inverter is used to input the second operating voltage, the second power supply terminal of the third inverter is grounded, and the output terminal of the third inverter is connected to the third or fourth terminal of the conversion module.

[0030] The third inverter is used to adjust the potential of the initial level signal and output the adjusted level signal to the conversion module.

[0031] Optionally, the circuit further includes a buffer;

[0032] The input terminal of the buffer is connected to the output node, the first output terminal of the buffer is used to output a first voltage, and the second output terminal of the buffer is used to output a second voltage;

[0033] The first voltage and the second voltage have opposite potentials.

[0034] Optionally, the voltage level of the first operating voltage is greater than the voltage level of the second operating voltage;

[0035] The first control signal has an opposite potential to the second control signal.

[0036] A second aspect of this application provides an electronic device including any of the level conversion circuits described in the first aspect above.

[0037] The beneficial effects of the embodiments of this application include:

[0038] This application provides a level conversion circuit comprising a pull-up module, a first control unit, a second control unit, and a conversion module. The first and second terminals of the pull-up module are respectively used to input a first operating voltage. The third terminal of the pull-up module is connected to the first terminal of the first control unit, and the fourth terminal of the pull-up module is connected to the first terminal of the second control unit. The first and second terminals of the conversion module are respectively used to input a second operating voltage. The third terminal of the conversion module is used to input a first control signal, and the fourth terminal of the conversion module is used to input a second control signal. The second terminal of the first control unit is connected to the fifth terminal of the conversion module, and the third terminal of the first control unit is used to input the second control signal. The second terminal of the second control unit is connected to the sixth terminal of the conversion module, and the third terminal of the second control unit is used to input the first control signal.

[0039] Because the first and second control units can reduce the pull-up capability of the pull-up module, the pull-up module can have a faster turn-off speed. That is, when the first control signal toggles from high to low and the second control signal toggles from low to high, the branch in the pull-up module connected in series with the first control unit has already been quickly turned off before the branch in the conversion module connected in series with the first control unit has started. Therefore, this avoids the problem of the branch in the pull-up module and the conversion module simultaneously conducting when the first control signal and / or the second control signal switch between high and low levels, thus preventing the output signal from transitioning from low to high voltage.

[0040] This can improve the reliability of level conversion. Attached Figure Description

[0041] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0042] Figure 1 A schematic diagram of a level conversion circuit provided for related technologies;

[0043] Figure 2 This is a schematic diagram of the structure of the first level conversion circuit provided in the embodiments of this application;

[0044] Figure 3 This is a schematic diagram of the structure of the second level conversion circuit provided in the embodiments of this application;

[0045] Figure 4 This is a schematic diagram of the structure of the third level conversion circuit provided in the embodiments of this application;

[0046] Figure 5 This is a schematic diagram of the structure of the fourth level conversion circuit provided in the embodiments of this application;

[0047] Figure 6 A schematic diagram of a signal timing provided in an embodiment of this application;

[0048] Figure 7 This is a schematic diagram of the structure of the fifth level conversion circuit provided in the embodiments of this application;

[0049] Figure 8 This is a schematic diagram of the sixth level conversion circuit provided in the embodiments of this application. Detailed Implementation

[0050] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0052] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0053] In the description of this application, it should be noted that the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0054] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0055] In related technologies, some level conversion circuits that convert low-voltage domain signals to high-voltage domain signals use MOSFETs. By inputting high-voltage or low-voltage control signals to the gates of the corresponding MOSFETs in different branches, the conduction or cutoff of each MOSFET in each branch is controlled, thereby converting the low-voltage domain to the high-voltage domain for output.

[0056] However, in the process of the control signal transitioning from low voltage to high voltage, the related technical solutions may fail to transition the output signal from low voltage to high voltage due to the simultaneous conduction of multiple MOSFETs on the same branch. Therefore, the related technical solutions suffer from unreliable level conversion.

[0057] For example, see Figure 1 , Figure 1A level conversion circuit in related technology is provided. This scheme specifically includes switching transistors M01, M02, M03, and M04, and an inverter INV0. The specific connection relationship is as follows: Figure 1 As shown, the embodiments of this application will not be described in detail here.

[0058] Due to Figure 1 The control signal input to the IN port is generally a periodic signal with high and low levels. During the switching process of this control signal between high and low levels, an intermediate voltage may occur, with the voltage level between the high and low levels. Therefore, this intermediate voltage may simultaneously turn on switching transistors M01 and M03, or simultaneously turn on switching transistors M02 and M04.

[0059] Specifically, if this intermediate voltage occurs during the transition of the control signal from low to high, it may cause both switching transistors M01 and M02 to remain on. Simultaneously, because switching transistor M01 is on, switching transistor M04 will also remain on, resulting in switching transistors M02 and M04 being simultaneously on. In this situation, this approach may lead to increased power consumption or even prevent the output signal level from transitioning.

[0060] To address this, this application provides a level conversion circuit. It comprises a pull-up module, a conversion module, a first control unit, and a second control unit. The first and second terminals of the pull-up module are respectively used to input a first operating voltage. The third terminal of the pull-up module is connected to the first terminal of the first control unit, and the fourth terminal of the pull-up module is connected to the first terminal of the second control unit. The first and second terminals of the conversion module are respectively used to input a second operating voltage. The third terminal of the conversion module is used to input a first control signal, and the fourth terminal of the conversion module is used to input the second control signal. The second terminal of the first control unit is connected to the fifth terminal of the conversion module, and the third terminal of the first control unit is used to input the second control signal. The second terminal of the second control unit is connected to the sixth terminal of the conversion module, and the third terminal of the second control unit is used to input the first control signal. The second control unit is used to conduct under the action of the first control signal and the first operating voltage, and to output a target level through its output node when conducting. This improves the reliability of the level conversion.

[0061] This application uses a level conversion circuit applied in an electronic device as an example for illustration. Specifically, it can be used to perform level conversion for an MCU in an electronic device. However, it does not mean that this application's embodiments can only be applied to level conversion in electronic devices.

[0062] The level conversion circuit provided in the embodiments of this application will be explained in detail below.

[0063] Figure 2 This is a schematic diagram of a level conversion circuit provided in this application. The level conversion circuit 100 can be applied to any electronic device that needs to convert low voltage to high voltage; the embodiments of this application do not limit this application. See also Figure 2 This application provides a level conversion circuit 100, which includes a pull-up module 101, a first control unit 102, a second control unit 103, and a conversion module 104.

[0064] The first and second ends of the pull-up module 101 are used to input the first working voltage, the third end of the pull-up module 101 is connected to the first end of the first control unit 102, and the fourth end of the pull-up module 101 is connected to the first end of the second control unit 103.

[0065] The first and second terminals of the conversion module 104 are used to input the second operating voltage, the third terminal of the conversion module 104 is used to input the first control signal, and the fourth terminal of the conversion module 104 is used to input the second control signal.

[0066] The second terminal of the first control unit 102 is connected to the fifth terminal of the conversion module 104, and the third terminal of the first control unit 102 is used to input the second control signal.

[0067] The second terminal of the second control unit 103 is connected to the sixth terminal of the conversion module 104, and the third terminal of the second control unit 103 is used to input the first control signal.

[0068] The conversion module 104 is used to control the pull-up module 101 to output the first working voltage to the first control unit 102 or the second control unit 103.

[0069] The first control unit 102 is turned on under the action of the second control signal and the first operating voltage.

[0070] Optionally, the second terminal of the second control unit 103 is also used as an output node of the level conversion circuit 100, such as... Figure 1 The output node OUT is shown in the figure. This output node is used to connect to any possible external electrical load, and this embodiment of the application does not limit this.

[0071] In this configuration, the second control unit 103 can be turned on under the influence of the first control signal and the first operating voltage, and output a target level through the output node when turned on. That is, the voltage level of the target level finally output by the level conversion circuit 100 is the same as the voltage level of the first operating voltage.

[0072] Optionally, the first operating voltage (e.g.) Figure 2The voltage level of VDDH shown is greater than that of the second operating voltage (e.g., VDDH). Figure 2 The voltage level of the VDDL shown. For example, the voltage level of the first operating voltage can be 5V, and the voltage level of the second operating voltage can be any possible voltage level such as 1.8V or 3V. This application embodiment does not limit this.

[0073] In other words, when the second control unit 103 is turned on, the circuit 100 can output a higher voltage to the outside.

[0074] Optionally, different branches can be set in the pull-up module 101 to input the first operating voltage. In addition, different branches can also be set in the conversion module 104. Generally, the number of branches in the conversion module 104 is the same as the number in the pull-up module 101, and each branch in the pull-up module 101 corresponds to the first control unit 102 and the second control unit 103, respectively.

[0075] For example, since the circuit 100 includes a first control unit 102 and a second control unit 103, two branches can be provided in the pull-up module 101 and the conversion module 104, and each branch can include a switching transistor. This application does not limit this aspect.

[0076] Optionally, the first control unit 102 and the second control unit 103 can be used to reduce the pull-up capability of the pull-up module 101. Specifically, the first control unit 102 and the second control unit 103 can reduce the pull-up capability of the pull-up module 101 by changing the impedance of each branch in the pull-up module 101 and / or the width-to-length ratio of each switch in the pull-up module 101. This application embodiment does not limit this.

[0077] Specifically, at any given time, the first operating voltage will only be input to one of the branches of the pull-up module 101.

[0078] Optionally, the first control signal and the second control signal have opposite potentials; specifically, the first control signal and the second control signal have opposite potentials at the same time. Furthermore, generally, the first control signal can be input to the second control unit at the same time as the second control signal is input to the first control unit 102.

[0079] In this embodiment, the second control signal and the first control signal can specifically be rectangular wave signals that are out of phase but have the same period and frequency. That is, when the second control signal is high, the first control signal is low; and when the second control signal is low, the first control signal is high. Moreover, because the first control signal and the second control signal have opposite potentials, they can be regarded as two signals with a phase difference of 180°.

[0080] The high level corresponding to the first control signal and the second control signal can be 1.8V, and the low level corresponding to the second control signal can be 0V. This application embodiment does not limit this.

[0081] In this embodiment, the first control unit 102 can be turned on when the second control signal is low and the first operating voltage is input. The second control unit 103 can be turned on when the first control signal is low and the first operating voltage is input.

[0082] In one possible way, see [link / reference] Figure 2 The third terminal of the pull-up module 101 can also serve as the control node OUTN of the circuit 100. The branch in the second control unit 103 connected in series with the pull-up module 101 can operate based on the voltage of the control node OUTN. This application embodiment does not limit this.

[0083] It should be noted that the specific working principle of the circuit 100 provided in this application embodiment is described as follows:

[0084] This application embodiment is illustrated using the example where the high level of the first control signal and the second control signal is 1.8V and the low level is 0V, and the first operating voltage is 5V and the second operating voltage is 1.8V.

[0085] In the power-off or sleep state, the pull-up module 101 has no first operating voltage input, the conversion module 104 has no second operating voltage input, the conversion module 104 and the second control unit 103 have no first control signal input, and the conversion module 104 and the first control unit 102 also have no second control signal input. At this time, the pull-up module 101, the conversion module 104, the first control unit 102 and the second control unit 103 all remain in a sleep state, and under these circumstances, the output node has no power output.

[0086] When the first control signal is high and the second control signal is low, the branch in the conversion module 104 connected in series with the first control unit 102 is turned off, and the branch connected in series with the second control unit 103 is turned on. Therefore, the voltage of the output node is pulled down to 0V. Simultaneously, under the current action of the conversion module 104, the first control unit 102 is activated, and the branch in the pull-up module 101 connected in series with the first control unit 102 is turned on, while the branch connected in series with the second control unit 103 is turned off. This, in turn, turns off the second control unit 103 and the branch in the pull-up module 101 connected in series with the second control unit 103. Specifically, the first operating voltage can be applied to the third terminal of the pull-up module 101 (i.e., the control node OUTN) via the pull-up module 101 and the first control unit 102. That is, the voltage of the control node OUTN is 5V, and the branch in the pull-up module 101 connected in series with the second control unit 103 is turned off when the voltage of the control node OUTN is 5V.

[0087] In this situation, the first operating voltage cannot be applied to the output node through the pull-up module 101 and the second control unit 103, so the voltage of the output node is continuously pulled down to 0V. That is, the voltage output by circuit 100 is 0V at this time.

[0088] When the first control signal is low and the second control signal is high, the branch in the conversion module 104 connected in series with the first control unit 102 is turned on, and the branch connected in series with the second control unit 103 is turned off. Therefore, the voltage at the third terminal (i.e., the control node OUTN) of the pull-up module 101 is pulled down to 0V. Simultaneously, under the current action of the conversion module 104, the second control unit 103 is activated, and the branch in the pull-up module 101 connected in series with the second control unit 103 is turned on, while the branch connected in series with the first control unit 102 is turned off. This, in turn, turns off the first control unit 102 and the branch in the pull-up module 101 connected in series with the first control unit 102. Specifically, the first operating voltage can be applied to the output node via the pull-up module 101 and the second control unit 103, meaning the voltage of the output node is 5V. The branch in the pull-up module 101 connected in series with the first control unit 102 is turned off when the voltage of the output node is 5V.

[0089] In this configuration, the first operating voltage can be applied to the output node via the pull-up module 101 and the second control unit 103, thus pulling the voltage of the output node up to 5V. In other words, the voltage output by circuit 100 is 5V. This allows circuit 100 to achieve the purpose of converting a low voltage to a high voltage output.

[0090] It is worth noting that, because the circuit 100 provided in this application embodiment adds a first control unit 102 and a second control unit 103 to reduce the pull-up capability of the pull-up module 101, the turn-off speed of the pull-up module 101 can be made faster. This avoids, as much as possible, situations where the branch in the pull-up module 101 connected in series with the first control unit 102 and the branch in the conversion module 101 connected in series with the first control unit 102 are simultaneously turned on, and / or the branch in the pull-up module 101 connected in series with the second control unit 103 and the branch in the conversion module 101 connected in series with the second control unit 103 are simultaneously turned on. Therefore, the problem of the output signal failing to transition from low voltage to high voltage when the first control signal and / or the second control signal switch between high and low levels can be avoided.

[0091] In this embodiment, a pull-up module 101, a first control unit 102, a second control unit 103, and a conversion module 104 are configured. The first and second terminals of the pull-up module 101 are respectively used to input a first operating voltage. The third terminal of the pull-up module 101 is connected to the first terminal of the first control unit 102, and the fourth terminal of the pull-up module 101 is connected to the first terminal of the second control unit 103. The first and second terminals of the conversion module 104 are respectively used to input a second operating voltage. The third terminal of the conversion module 104 is used to input a first control signal, and the fourth terminal of the conversion module 104 is used to input a second control signal. The second terminal of the first control unit 102 is connected to the fifth terminal of the conversion module 104, and the third terminal of the first control unit 102 is used to input the second control signal. The second terminal of the second control unit 103 is connected to the sixth terminal of the conversion module 104, and the third terminal of the second control unit 103 is used to input the first control signal.

[0092] Because the first control unit 101 and the second control unit 102 can reduce the pull-up capability of the pull-up module 101, the pull-up module 101 can have a faster turn-off speed. That is, when the first control signal flips from high to low and the second control signal flips from low to high, the branch in the pull-up module 101 connected in series with the first control unit 102 has already been quickly turned off before the branch in the conversion module 101 connected in series with the first control unit 102 has been activated. Therefore, the problem of the branch in the pull-up module 101 and the conversion module 104 being simultaneously turned on when the first control signal and / or the second control signal are switching between high and low levels, thus preventing the output signal from flipping from low voltage to high voltage, can be avoided.

[0093] This can improve the reliability of level conversion.

[0094] In addition, since the circuit 100 provided in this application embodiment can avoid the problem of the simultaneous conduction of the branches connected in series in the pull-up module 101 and the conversion module 104, the problem of increased power consumption due to common circuits is also avoided.

[0095] In one possible implementation, see [link to relevant documentation]. Figure 3 The first control unit 102 is the first switch M1, and the second control unit 103 is the second switch M2.

[0096] The source of the first switching transistor M1 is connected to the third terminal of the pull-up module 101, the drain of the first switching transistor M1 is connected to the fifth terminal of the conversion module 104, and the gate of the first switching transistor M1 is used to input the second control signal.

[0097] The source of the second switch M2 is connected to the fourth terminal of the pull-up module 101, the drain of the second switch M2 is connected to the sixth terminal of the conversion module 104, and the gate of the second switch M2 is used to input the first control signal.

[0098] Optionally, both the first switch M1 and the second switch M2 can be P-channel type switches, such as PMOS transistors or any other possible switches. Furthermore, considering cost reduction, PMOS transistors can be preferred. This application does not limit this choice.

[0099] Furthermore, the dimensions and other possible parameters of the first switching transistor M1 and the second switching transistor M2 can be the same. This ensures that the switching speed and other performance characteristics of the first switching transistor M1 and the second switching transistor M2 are the same or similar, thereby improving the symmetry and stability of the circuit 100. At the same time, it can also reduce the design complexity of the circuit 100.

[0100] It is worth noting that since both the first switch M1 and the second switch M2 are P-channel switches, the first switch M1 is turned on when the second control signal input to the gate of the first switch M1 is low and the branch in the conversion module 104 connected in series with the first switch M1 is turned on to output the first operating voltage to the source of the first switch M1. Similarly, the second switch M2 is turned on when the first control signal input to the gate of the second switch M2 is low and the branch in the conversion module 104 connected in series with the second switch M2 is turned on to output the first operating voltage to the source of the second switch M2.

[0101] It is worth noting that since each branch in the pull-up module 101 connected in series with the first control unit 102 and / or the second control unit 103 can include a switching transistor, connecting the branch in series with the first switching transistor M1 and the first control unit 102 in the pull-up module 101, and connecting the branch in series with the second switching transistor M2 and the second control unit 103 in the pull-up module 101, can increase the width-to-length ratio of the switching transistors in each branch of the pull-up module 101, thereby reducing the pull-up capability of the pull-up module 101.

[0102] This allows the pull-up module 101 to turn off more quickly, thereby avoiding the problem that the output signal cannot switch from low voltage to high voltage when the first control signal and / or the second control signal are switching between high and low levels.

[0103] In one possible implementation, see [link to relevant documentation]. Figure 4 The conversion module 104 includes a third switch M3 and a fourth switch M4.

[0104] The gate of the third switch M3 is used to input the second operating voltage, the source of the third switch M3 is used to input the first control signal, and the drain of the third switch M3 is connected to the second terminal of the first control unit 102.

[0105] The gate of the fourth switch M4 is used to input the second operating voltage, the source of the fourth switch M4 is used to input the second control signal, and the drain of the fourth switch M4 is connected to the second terminal of the second control unit 103.

[0106] The third switch M3 is used to turn on when the first control signal meets the first preset voltage and to turn off when the first control signal meets the second preset voltage.

[0107] The fourth switch M4 is used to turn on when the second control signal meets the first preset voltage and to turn off when the first control signal meets the second preset voltage.

[0108] Optionally, both the third switch M3 and the fourth switch M4 can be N-channel switches, such as NMOS transistors or any other possible switches. Furthermore, considering cost reduction, NMOS transistors can be preferred. This application does not limit this choice.

[0109] Furthermore, the dimensions and other possible parameters of the third switch M3 and the fourth switch M4 can be the same. This ensures that the switching speed and other performance characteristics of the third switch M3 and the fourth switch M4 are the same or similar, thereby improving the symmetry and stability of the circuit 100.

[0110] Optionally, the first preset voltage is less than the second preset voltage. Specifically, the first preset voltage may refer to a voltage whose difference from the second operating voltage satisfies the turn-on threshold of the third switch M3 and the fourth switch M4. Furthermore, the second preset voltage may refer to a voltage whose difference from the second operating voltage does not satisfy the turn-on threshold of the third switch M3 and the fourth switch M4. This is specifically determined by the parameters of each device in circuit 100 and / or the voltage level of each signal; this embodiment does not limit this.

[0111] It is worth noting that since both the third switch M3 and the fourth switch M4 are N-channel switches, and the second operating voltage (1.8V) is applied to the gate of both the third switch M3 and the gate of the fourth switch M4, when the first control signal is high (1.8V) and the second control signal is low (0V), the voltage difference between the source and gate of the fourth switch M4 can meet the turn-on threshold of the fourth switch M4, while the voltage difference between the source and gate of the third switch M3 does not meet the turn-on threshold of the third switch M3. At this time, the fourth switch M4 is turned on and the third switch M3 is turned off, and the voltage of the output node is pulled down to 0.

[0112] Similarly, when the second control signal is high (1.8V) and the first control signal is low (0V), the voltage difference between the source and gate of the third switch M3 can meet the turn-on threshold of the third switch M3, while the voltage difference between the source and gate of the fourth switch M4 does not meet the turn-on threshold of the fourth switch M4. At this time, the third switch M3 is turned on and the fourth switch M4 is turned off, and the voltage of the aforementioned control node OUTN is pulled down to 0.

[0113] In this way, the conduction or cutoff of each branch in the conversion module 104 can be reliably and accurately controlled based on the first control signal and the second control signal, thereby facilitating the operation of other devices in the control circuit 100.

[0114] It is worth noting that in the circuit 100 provided in this application embodiment, since the sources of the third switch M3 and the fourth switch M4 are used to input the first control signal and the second control signal respectively, and are not directly grounded, the third switch M3 and the fourth switch M4 in this application embodiment have a certain clamping capability. That is, during the process of the first control signal and the second control signal changing from high level to low level, the third switch M3 and the fourth switch M4 will start slowly instead of being directly turned on.

[0115] Furthermore, because the first control unit 102 and the second control unit 103 reduce the pull-up capability of the pull-up module 101, resulting in a faster turn-off speed, when the first control signal and / or the second control signal toggle between high and low levels, the third switch M3 and the fourth switch M4 start up more slowly, and the pull-up module 101 turns off more quickly. This further reduces the likelihood of the third switch M3 and the branch in the pull-up module 101 connected in series with the first control unit 102 simultaneously being turned on, as well as the fourth switch M4 and the branch in the pull-up module 101 connected in series with the second control unit 103 simultaneously being turned on.

[0116] This can further improve the reliability of level conversion.

[0117] In one possible implementation, see [link to previous section] Figure 4 The pull-up module 101 includes a fifth switch M5 and a sixth switch M6.

[0118] The source of the fifth switch M5 is used to input the first operating voltage, the drain of the fifth switch M5 is connected to the first terminal of the first control unit 102, and the gate of the fifth switch M5 is connected to the second terminal of the second control unit 103 and the drain of the fourth switch M4, respectively.

[0119] The source of the sixth switch M6 is used to input the first operating voltage, the drain of the sixth switch M6 is connected to the first terminal of the second control unit 103, and the gate of the sixth switch M6 is connected to the second terminal of the first control unit 102 and the drain of the third switch M3, respectively.

[0120] The fifth switch M5 is used to turn off when the fourth switch M4 is off and to turn on when the fourth switch M4 is on, so as to output the first operating voltage to the first control unit 102.

[0121] The sixth switch M6 is used to turn off when the third switch M3 is off and turn on when the third switch M3 is on to output the first operating voltage to the first control unit 102.

[0122] Optionally, both the fifth switch M5 and the sixth switch M6 can be P-channel switches, such as PMOS transistors or any other possible switches. Furthermore, considering cost reduction, PMOS transistors can be preferred. This application does not limit this choice.

[0123] Furthermore, the dimensions and other possible parameters of the fifth switch M5 and the sixth switch M6 can be the same. This ensures that the switching speed and other performance characteristics of the fifth switch M5 and the sixth switch M6 are the same or similar, thereby improving the symmetry and stability of the circuit 100.

[0124] It is worth noting that since both the fifth switch M5 and the sixth switch M6 are P-channel switches, and the gate of the fifth switch M5 is connected to the second terminal of the second control unit 103 (i.e., the aforementioned output node), when the fourth switch M4 is turned on and the voltage of the output node is pulled low, the gate voltage of the fifth switch M5 is low and the source voltage is high. This satisfies the turn-on threshold of the fifth switch M5, and the fifth switch M5 turns on. When the fourth switch M4 is turned off and the voltage of the output node is not pulled low, the voltage difference between the gate and source of the fifth switch M5 does not meet the turn-on threshold of the fifth switch M5, and the fifth switch M5 turns off.

[0125] Similarly, the gate of the sixth switch M6 is connected to the second terminal of the first control unit 102 (i.e., the aforementioned control node). Therefore, when the third switch M3 is turned on and the voltage of the control node is pulled low, the gate voltage of the sixth switch M6 is low and the source voltage is high, which satisfies the turn-on threshold of the sixth switch M6, and the sixth switch M6 is turned on. When the third switch M3 is turned off and the voltage of the control node is not pulled low, the voltage difference between the gate and source of the sixth switch M6 does not satisfy the turn-on threshold of the sixth switch M6, and the sixth switch M6 is turned off.

[0126] It should be understood that when the fifth switch M5 is turned on, the first operating voltage can be output to the first switch M1 through the fifth switch M5, and at this time the second control signal should be at a low level. Therefore, the first switch M1 is turned on.

[0127] Similarly, when the sixth switch M6 is turned on, the first operating voltage can be output to the second switch M2 through the sixth switch M6, and at this time the first control signal should be at a low level, so the second switch M2 is turned on.

[0128] It is worth noting that since the fifth switch M5, the sixth switch M6, the first switch M1, and the second switch M2 are all P-channel switches, and the fifth switch M5 and the first switch M1 are connected in series, and the sixth switch M2 and the second switch M2 are connected in series, the width-to-length ratio of the fifth switch M5, the sixth switch M6, the first switch M1, and the second switch M2 will all be increased, resulting in a faster turn-off speed. In other words, when the first control signal flips from high to low and the second control signal flips from low to high, the fifth switch M5 and / or the first switch M1 have already been quickly turned off before the fourth switch M4 has been turned on.

[0129] This avoids the problem of the fifth switch M5, the first switch M1, and the fourth switch M4 being turned on simultaneously, which would prevent the output signal from switching from low voltage to high voltage.

[0130] In one possible implementation, see [link to relevant documentation]. Figure 5 The level conversion circuit 100 also includes a level adjustment module 105.

[0131] The first terminal of the level adjustment module 105 is used to input the initial level signal, the second terminal of the level adjustment module 105 is connected to the third terminal of the conversion module 104, and the third terminal of the level adjustment module 105 is connected to the fourth terminal of the conversion module 104.

[0132] The level adjustment module 105 is used to convert the initial level signal into the second control signal and the first control signal, and output the second control signal and the first control signal to the conversion module 104 respectively.

[0133] Optionally, the initial level signal can be a digital logic level signal output by any possible device or apparatus, and the initial level signal can also be a square wave signal. Specifically, it can be seen from... Figure 5 The IN port input level adjustment module 105 shown in this embodiment is not limited to this embodiment.

[0134] It is understood that the purpose of converting the initial level signal into the first control signal and the second control signal can be achieved in various ways, therefore the level adjustment module 105 can also have different interfaces. The following are several possible implementation methods provided in the embodiments of this application:

[0135] In the first possible approach, see [link / reference] Figure 5 The level adjustment module 105 includes a first inverter INV1 and a second inverter INV2. The input terminal of the first inverter INV1 is used to input the initial level signal, the first power supply terminal of the first inverter INV1 is used to input the second operating voltage, the second power supply terminal of the first inverter INV1 is grounded, and the output terminal of the first inverter INV1 is connected to the input terminals of the conversion module 104 and the second inverter INV2, respectively.

[0136] The first power supply terminal of the second inverter INV2 is used to input the second operating voltage. The second power supply terminal of the second inverter INV2 is grounded. The output terminal of the second inverter INV2 is connected to the conversion module 104.

[0137] Optionally, the first inverter INV1 is used to convert the initial level signal into the first control signal, and output the first control signal to the input terminal of the second inverter INV2 and the conversion module 104. The second inverter INV2 is used to convert the first control signal into the second control signal, and output the second control signal to the conversion module 104.

[0138] In this case, the initial level signal and the second control signal can have the same phase and period, while the initial level signal and the first control signal have opposite phase and the same period.

[0139] Specifically, the first inverter INV1 and the second inverter INV2 can output control signals to different branches in the conversion module 104, but this embodiment does not limit this.

[0140] It is important to understand that, please continue to refer to Figure 5 Although Figure 5 The output of the first inverter INV1 is connected to the third terminal (source of the third switching transistor) of the conversion module 104, and the output of the second inverter INV2 is connected to the fourth terminal (source of the fourth switching transistor M4) of the conversion module 104, but... Figure 5 The structure shown is merely an example. In practical applications, the output of the first inverter INV1 can be connected to the fourth terminal (the source of the fourth switch M4) of the conversion module 104, and the output of the second inverter INV2 can be connected to the third terminal (the source of the third switch M3) of the conversion module 104. It is only necessary to ensure that the control signals output to the third switch M3 and the fourth switch M4 are inverted and have the same period; this embodiment does not limit this.

[0141] Furthermore, since the first switch M1 also requires the second control signal and the second switch M2 also requires the first control signal, it can also be configured according to... Figure 5 As shown, the output terminal of the first inverter INV1 is simultaneously connected to the gate of the second switch M2, and the output terminal of the second inverter INV2 is simultaneously connected to the gate of the first switch M1, so as to synchronously output corresponding control signals to the first switch M1 and the second switch M2.

[0142] To more clearly and understandably describe the working principle of circuit 100 in the embodiments of this application, the following is based on... Figure 4 and Figure 5 The specific connection relationships of the first switch M1, the second switch M2, the third switch M3, the fourth switch M4, the fifth switch M5, and the sixth switch M6 shown in the figure are explained.

[0143] For example, see [link to previous article] Figure 5 When the initial input signal is low (0V), the first inverter INV1 outputs a high level (1.8V), and the second inverter INV2 outputs a low level (0V). At this time, since the third switch M3 and the fourth switch M4 are N-channel switches, the third switch M3 is turned off and the fourth switch M4 is turned on, causing the voltage of the output node to be pulled down to 0V. Because the fifth switch M5 and the first switch M1 are P-channel switches, the gate voltage of the fifth switch M5 is 0V, and the source voltage is the first operating voltage (5V). Therefore, the fifth switch M5 is turned on, outputting the first operating voltage to the source of the first switch M1. Since the gate of the first switch M1 is the second control signal (0V), the first switch M1 is turned on, causing the voltage of the control node OUTN to be 5V. Since the sixth switch M6 and the second switch M2 are P-channel switches, the gate voltage of the sixth switch M6 is 5V. When the sixth switch M6 is turned off, the second switch M2 is also turned off, and the voltage of the output node remains at 0V.

[0144] When the initial input signal is high (1.8V), the first inverter INV1 outputs low (0V), and the second inverter INV2 outputs high (1.8V). At this time, since the third switch M3 and the fourth switch M4 are N-channel switches, the third switch M3 is turned on and the fourth switch M4 is turned off, causing the voltage of the control node OUTN to be pulled down to 0V. Because the sixth switch M6 and the second switch M2 are P-channel switches, the gate voltage of the sixth switch M6 is 0V, and the source voltage is the first operating voltage (5V). Therefore, the sixth switch M6 is turned on, outputting the first operating voltage to the source of the second switch M2. Since the gate of the second switch M2 is the first control signal (0V), the second switch M2 is turned on, making the voltage of the output node 5V. Since the fifth switch M5 and the first switch M1 are P-channel switches, the gate voltage of the fifth switch M5 is 5V. When the fifth switch M5 is turned off, the first switch M1 is also turned off, and the voltage of the control node remains at 0V.

[0145] Based on the above working principle, this application embodiment also provides a possible signal timing diagram, see details below. Figure 6 Therefore, when the initial level signal input from the IN port is low (0V), the target level output from this output node is also low (0V). When the initial level signal input from the IN port is high (1.8V), the target level output from this output node is high (5V).

[0146] In this way, the purpose of converting the low-pressure domain into the high-pressure domain can be achieved.

[0147] In the second possible approach, see Figure 7 The level adjustment module 105 includes: a third inverter INV3.

[0148] The input terminal of the third inverter INV3 is used to input the initial level signal, the first power supply terminal of the third inverter INV3 is used to input the second operating voltage, the second power supply terminal of the third inverter INV3 is grounded, and the output terminal of the third inverter INV3 is connected to the third or fourth terminal of the conversion module 104.

[0149] The third inverter INV3 is used to adjust the potential of the initial level signal and output the adjusted level signal to the conversion module 104.

[0150] Optionally, the third inverter INV3 can specifically invert the potential of the initial level signal. At any given moment, if the initial level signal is high, then the adjusted level signal is low; if the initial level signal is low, then the adjusted level signal is high. That is, the adjusted level signal is inverted compared to the initial level signal.

[0151] It should be understood that if the output of the third inverter INV3 is connected to the third terminal of the conversion module 104, then the initial level signal can also be directly input to the fourth terminal of the conversion module 104. In this case, the initial level signal can be the second control signal, and the adjusted level signal can be the first control signal.

[0152] If the output of the third inverter INV3 is connected to the fourth terminal of the conversion module 104, then the initial level signal can also be directly input to the third terminal of the conversion module 104. In this case, the initial level signal can be the first control signal, and the adjusted level signal can be the second control signal.

[0153] In other words, the third inverter INV3 can output the adjusted level signal to the third terminal of the conversion module 104, or it can output the adjusted level signal to the fourth terminal of the conversion module 104. It is only necessary to ensure that the control signals output to the third switch M3 and the fourth switch M4 are inverted level signals with the same period; this embodiment of the application does not impose any limitations on this.

[0154] Furthermore, since the first switch M1 also requires the second control signal and the second switch M2 also requires the first control signal, the output terminal of the third inverter INV3 can be connected to the gate of one of the first and second switch M1, as shown in the figure above. Additionally, it can be directly connected to the gate of the other switch between the first and second switch M2, depending on the actual situation, to synchronously output corresponding control signals to both the first and second switch M1 and M2. This application does not limit this aspect.

[0155] As can be seen from the above, the embodiments of this application provide multiple methods to output the first control signal and the second control signal to the circuit 100, so as to stably and reliably control the conduction or cutoff of each switching transistor in the circuit 100. In this way, the flexibility and practicality of the circuit 100 can be improved.

[0156] In one possible implementation, see [link to relevant documentation]. Figure 8 Circuit 100 also includes buffer 106.

[0157] The input terminal of buffer 106 is connected to the output node. The first output terminal of buffer 106 is used to output a first voltage, and the second output terminal of buffer 106 is used to output a second voltage.

[0158] Optionally, the first voltage and the second voltage have opposite potentials.

[0159] For example, see [link to previous article] Figure 8 The buffer 106 may include a fourth inverter INV4 and a fifth inverter INV5.

[0160] Specifically, the input terminal of the fourth inverter INV4 is connected to the output node, and the output terminal of the fourth inverter INV4 is connected to the input terminal of the fifth inverter INV5. The first power supply terminal of the fourth inverter INV4 and the first power supply terminal of the fifth inverter INV5 are respectively used to input the aforementioned first operating voltage, and the second power supply terminals of the fourth inverter INV4 and the fifth inverter INV5 are respectively grounded.

[0161] In addition, the output of the fourth inverter INV4 can also be connected to each of the first power-consuming units, and the output of the fifth inverter INV5 can also be connected to each of the second power-consuming units.

[0162] Optionally, the first power-consuming unit and the second power-consuming unit require opposite potentials at the same time.

[0163] Understandably, since some electronic devices may have multiple different power loads or power units that require the target level, but each power unit may require different phases or different potentials at the same time, setting the fourth inverter INV4 and the fifth inverter INV5 can obtain two signals with different phases based on the target level. Then, the signals output from the fourth inverter INV4 and the fifth inverter INV5 can be output to different power units respectively to meet the different needs of each power unit in the electronic device. In addition, the buffer 106 also has a certain amplification capability, thus the buffer 106 can also enhance the driving capability of the target level.

[0164] This improves the practicality and flexibility of circuit 100.

[0165] The following describes the electronic device provided in this application used for execution. This electronic device belongs to the same concept as the level conversion circuit described above. For its specific implementation process and technical effects, please refer to the relevant description in the corresponding embodiment of the level conversion circuit described above. It will not be repeated in detail below.

[0166] This application also provides an electronic device, which includes at least the level conversion circuit 100 provided in any of the above embodiments.

[0167] Optionally, the electronic device may further include a power supply module, which can be used to output the first operating voltage and / or the second operating voltage to the level conversion circuit 100.

[0168] Optionally, the electronic device may also include any possible power-consuming units, and the target level output by the level conversion circuit 100 can be output to these power-consuming units in order to power each power-consuming unit.

[0169] In addition, the electronic device may also include any other possible devices or apparatus, which are not limited in this application.

[0170] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

[0171] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A level conversion circuit, characterized in that, The level conversion circuit includes: a pull-up module, a conversion module, a first control unit, and a second control unit; The first and second ends of the pull-up module are respectively used to input the first working voltage, the third end of the pull-up module is connected to the first end of the first control unit, and the fourth end of the pull-up module is connected to the first end of the second control unit. The first and second terminals of the conversion module are respectively used to input a second operating voltage, the third terminal of the conversion module is used to input a first control signal, and the fourth terminal of the conversion module is used to input a second control signal; the conversion module is used to control the pull-up module to output the first operating voltage to the first control unit or the second control unit; The second terminal of the first control unit is connected to the fifth terminal of the conversion module, and the third terminal of the first control unit is used to input the second control signal; the first control unit is used to conduct under the action of the second control signal and the first operating voltage. The second terminal of the second control unit is connected to the sixth terminal of the conversion module, and the third terminal of the second control unit is used to input the first control signal; the second terminal of the second control unit is also used as the output node of the level conversion circuit. The second control unit is used to turn on under the action of the first control signal and the first operating voltage, and to output a target level through the output node when turned on; the first control unit and the second control unit are specifically used to reduce the pull-up capability of the pull-up module; The first control unit is a first switching transistor, and the second control unit is a second switching transistor; The conversion module includes a third switch and a fourth switch; The gate of the third switch is used to input the second operating voltage, the source of the third switch is used to input the first control signal, and the drain of the third switch is connected to the second terminal of the first control unit. The gate of the fourth switch is used to input the second operating voltage, the source of the fourth switch is used to input the second control signal, and the drain of the fourth switch is connected to the second terminal of the second control unit. The pull-up module includes a fifth switch and a sixth switch; The source of the fifth switch is used to input the first operating voltage, the drain of the fifth switch is connected to the first terminal of the first control unit, and the gate of the fifth switch is connected to the second terminal of the second control unit and the drain of the fourth switch, respectively. The source of the sixth switch is used to input the first operating voltage, the drain of the sixth switch is connected to the first terminal of the second control unit, and the gate of the sixth switch is connected to the second terminal of the first control unit and the drain of the third switch.

2. The level conversion circuit as described in claim 1, characterized in that, The source of the first switching transistor is connected to the third terminal of the pull-up module, the drain of the first switching transistor is connected to the fifth terminal of the conversion module, and the gate of the first switching transistor is used to input the second control signal. The source of the second switch is connected to the fourth terminal of the pull-up module, the drain of the second switch is connected to the sixth terminal of the conversion module, and the gate of the second switch is used to input the first control signal.

3. The level conversion circuit as described in claim 1, characterized in that, The third switch is used to turn on when the first control signal meets the first preset voltage and to turn off when the first control signal meets the second preset voltage. The fourth switch is used to turn on when the second control signal satisfies the first preset voltage and to turn off when the first control signal satisfies the second preset voltage. The first preset voltage is less than the second preset voltage.

4. The level conversion circuit as described in claim 3, characterized in that, The fifth switch is used to turn off when the fourth switch is off and turn on when the fourth switch is on to output the first operating voltage to the first control unit. The sixth switch is used to turn off when the third switch is off and turn on when the third switch is on to output the first operating voltage to the first control unit.

5. The level conversion circuit as described in claim 1, characterized in that, The level conversion circuit further includes: a level adjustment module; The first terminal of the level adjustment module is used to input an initial level signal, the second terminal of the level adjustment module is connected to the third terminal of the conversion module, and the third terminal of the level adjustment module is connected to the fourth terminal of the conversion module. The level adjustment module is used to convert the initial level signal into the second control signal and the first control signal, and output the second control signal and the first control signal to the conversion module respectively.

6. The level conversion circuit as described in claim 5, characterized in that, The level adjustment module includes: a first inverter and a second inverter; the input terminal of the first inverter is used to input the initial level signal, the first power supply terminal of the first inverter is used to input the second operating voltage, the second power supply terminal of the first inverter is grounded, and the output terminal of the first inverter is connected to the conversion module and the input terminal of the second inverter respectively; the first inverter is used to convert the initial level signal into the first control signal. The first power supply terminal of the second inverter is used to input the second operating voltage, the second power supply terminal of the second inverter is grounded, and the output terminal of the second inverter is connected to the conversion module; the second inverter is used to convert the first control signal into the second control signal.

7. The level conversion circuit as described in claim 5, characterized in that, The level adjustment module includes: a third inverter; The input terminal of the third inverter is used to input the initial level signal, the first power supply terminal of the third inverter is used to input the second operating voltage, the second power supply terminal of the third inverter is grounded, and the output terminal of the third inverter is connected to the third or fourth terminal of the conversion module. The third inverter is used to adjust the potential of the initial level signal and output the adjusted level signal to the conversion module.

8. The level conversion circuit as described in claim 1, characterized in that, The circuit also includes a buffer; The input terminal of the buffer is connected to the output node, the first output terminal of the buffer is used to output a first voltage, and the second output terminal of the buffer is used to output a second voltage; The first voltage and the second voltage have opposite potentials.

9. The level conversion circuit according to any one of claims 1-8, characterized in that, The voltage level of the first operating voltage is greater than the voltage level of the second operating voltage; The first control signal has the opposite potential to the second control signal.

10. An electronic device, characterized in that, The electronic device includes the level conversion circuit according to any one of claims 1 to 9.

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