Level conversion circuit and electronic device

Abstract

The invention 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 a 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 a first control signal. According to the invention, the reliability of level conversion can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to a level conversion circuit and an electronic device. Background Art

[0002] Various electronic devices have been rapidly popularized in thousands of households, and many electronic devices are equipped with corresponding microcontroller units (MCUs). These MCUs usually work in different power domains, so corresponding level conversion circuits need to be set in these electronic devices.

[0003] In the related art, some level conversion circuits that convert low-voltage domain signals into high-voltage domain signals use multiple Metal-Oxide-Semiconductor Field-Effect Transistors (MOS tubes for short), and control the on or off of each MOS tube in each branch by inputting high-voltage or low-voltage control signals to the gates of the corresponding MOS tubes in different branches, thereby converting the low-voltage domain into a high-voltage domain for output.

[0004] However, in the process of controlling the signal to switch from low voltage to high voltage, the MOS tubes on the same branch may be turned on at the same time, which may cause the output signal to fail to switch from low voltage to high voltage. Therefore, the solution of the related art has the problem of unreliable level conversion. Summary of the invention

[0005] The purpose of the present application is to provide a level conversion circuit and an electronic device, which can improve the reliability of level conversion.

[0006] The embodiment of the present application is implemented as follows:

[0007] In a first aspect of an embodiment of the present application, a level conversion circuit is provided, the level conversion circuit comprising: a pull-up module, a conversion module, a first control unit and a second control unit;

[0008] The first end and the second end of the pull-up module are respectively used to input a 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 end and the second end of the conversion module are respectively used to input the second working voltage, the third end of the conversion module is used to input the first control signal, and the fourth end of the conversion module is used to input the second control signal; the conversion module is used to control the pull-up module to output the first working voltage to the first control unit or the second control unit;

[0010] The second end of the first control unit is connected to the fifth end of the conversion module, and the third end of the first control unit is used to input the second control signal; the first control unit is used to be turned on under the action of the second control signal and the first working voltage;

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

[0012] The second control unit is used to be turned on under the action of the first control signal and the first working voltage, and to output the 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 switch tube, and the second control unit is a second switch tube;

[0014] The source of the first switch tube is connected to the third end of the pull-up module, the drain of the first switch tube is connected to the fifth end of the conversion module, and the gate of the first switch tube is used to input the second control signal;

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

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

[0017] The gate of the third switch tube is used to input the second working voltage, the source of the third switch tube is used to input the first control signal, and the drain of the third switch tube is connected to the second end of the first control unit; the third switch tube is used to be turned on when the first control signal meets the first preset voltage, and turned off when the first control signal meets the second preset voltage;

[0018] The gate of the fourth switch tube is used to input the second working voltage, the source of the fourth switch tube is used to input the second control signal, and the drain of the fourth switch tube is connected to the second end of the second control unit; the fourth switch tube is used to be turned on when the second control signal meets the first preset voltage, and turned off when the first control signal meets the second preset voltage;

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

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

[0021] The source of the fifth switch tube is used to input the first working voltage, the drain of the fifth switch tube is connected to the first end of the first control unit, and the gate of the fifth switch tube is connected to the second end of the second control unit and the drain of the fourth switch tube respectively; the fifth switch tube is used to be turned off when the fourth switch tube is turned off, and turned on when the fourth switch tube is turned on, so as to output the first working voltage to the first control unit;

[0022] The source of the sixth switch tube is used to input the first operating voltage, the drain of the sixth switch tube is connected to the first end of the second control unit, and the gate of the sixth switch tube is respectively connected to the second end of the first control unit and the drain of the third switch tube; the sixth switch tube is used to be turned off when the third switch tube is turned off, and to be turned on when the third switch tube is turned on, so as 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 end of the level adjustment module is used to input an initial level signal, the second end of the level adjustment module is connected to the third end of the conversion module, and the third end of the level adjustment module is connected to the fourth end of the conversion module;

[0025] The level adjustment module is used for converting the initial level signal into the second control signal and the first control signal, and outputting 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 end of the first inverter is used to input the initial level signal, the first power supply end of the first inverter is used to input the second working voltage, the second power supply end of the first inverter is grounded, and the output end of the first inverter is respectively connected to the input end of the conversion module and the second inverter; 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 working 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 end of the third inverter is used to input the initial level signal, the first power supply end of the third inverter is used to input the second working voltage, the second power supply end of the third inverter is grounded, and the output end of the third inverter is connected to the third end or the fourth end 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 comprises a buffer;

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

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

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

[0035] The first control signal and the second control signal have opposite potentials.

[0036] A second aspect of the embodiments of the present application provides an electronic device, comprising any level conversion circuit described in the first aspect.

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

[0038] A level conversion circuit provided in an embodiment of the present application is provided by setting a pull-up module, a first control unit, a second control unit and a conversion module. In addition, the first end and the second end of the pull-up module are respectively used to input a first operating 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 end and the second end of the conversion module are respectively used to input a second operating voltage, the third end of the conversion module is used to input a first control signal, and the fourth end of the conversion module is used to input a second control signal. The second end of the first control unit is connected to the fifth end of the conversion module, and the third end of the first control unit is used to input the second control signal. The second end of the second control unit is connected to the sixth end of the conversion module, and the third end of the second control unit is used to input the first control signal.

[0039] Among them, since the first control unit and the second control unit can reduce the pull-up capability of the pull-up module, the pull-up module can have a faster shut-down speed, that is, when the first control signal is flipped from a high level to a low level and the second control signal is flipped from a low level to a high level, when the branch in the conversion module connected in series with the first control unit has not yet started, the branch in the pull-up module connected in series with the first control unit has been quickly shut down. Therefore, it can be avoided that when the first control signal and / or the second control signal is switched between high and low levels, the branches in series in the pull-up module and the conversion module are turned on at the same time, thereby causing the output signal to be unable to flip from a low voltage to a high voltage.

[0040] In this way, the reliability of level conversion can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1 A schematic diagram of a level conversion circuit provided in the related art;

[0043] Figure 2 A schematic diagram of the structure of a first level conversion circuit provided in an embodiment of the present application;

[0044] Figure 3 A schematic diagram of the structure of a second level conversion circuit provided in an embodiment of the present application;

[0045] Figure 4 A schematic diagram of the structure of a third level conversion circuit provided in an embodiment of the present application;

[0046] Figure 5 A schematic diagram of the structure of a fourth level conversion circuit provided in an embodiment of the present application;

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

[0048] Figure 7 A schematic diagram of the structure of a fifth level conversion circuit provided in an embodiment of the present application;

[0049] Figure 8 A schematic diagram of the structure of a sixth level conversion circuit provided in an embodiment of the present application. DETAILED DESCRIPTION

[0050] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0051] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0052] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

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

[0054] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0055] In the related art, some level conversion circuits that convert low-voltage domain signals into high-voltage domain signals use MOS tubes, and control the conduction or shutdown of each MOS tube in each branch by inputting high-voltage or low-voltage control signals to the gates of corresponding MOS tubes in different branches, thereby converting the low-voltage domain into a high-voltage domain for output.

[0056] However, in the process of controlling the signal to switch from low voltage to high voltage, the MOS tubes on the same branch may be turned on at the same time, which may cause the output signal to fail to switch from low voltage to high voltage. Therefore, the solution of the related art has the problem of unreliable level conversion.

[0057] For example, see Figure 1 , Figure 1A level conversion circuit in the related art is provided. Specifically, a switch tube M01, a switch tube M02, a switch tube M03, a switch tube M04 and an inverter INV0 are provided in this solution. The specific connection relationship is as follows: Figure 1 As shown, the embodiments of the present application are not described in detail here.

[0058] Because from Figure 1 The control signal input to the IN port is generally a periodic signal with high and low levels, and an intermediate voltage may appear during the high and low level switching of the control signal, and the voltage level of the intermediate voltage is between the high level and the low level. Therefore, the intermediate voltage may turn on the switch tube M01 and the switch tube M03 at the same time, or turn on the switch tube M02 and the switch tube M04 at the same time.

[0059] Specifically, if the intermediate voltage appears during the process of the control signal flipping from a low level to a high level, it is possible that the switch tubes M01 and M02 are both turned on, and because the switch tube M01 is turned on, the switch tube M04 is also turned on, thereby causing the switch tubes M02 and M04 to be in common. In this case, this solution may increase power consumption and even cause the level of the output signal to be unable to flip.

[0060] To this end, the embodiment of the present application provides a level conversion circuit, by setting a pull-up module, a conversion module, a first control unit and a second control unit, and making the first end and the second end of the pull-up module 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 end and the second end of the conversion module are respectively used to input the second working voltage, the third end of the conversion module is used to input the first control signal, and the fourth end of the conversion module is used to input the second control signal. The second end of the first control unit is connected to the fifth end of the conversion module, and the third end of the first control unit is used to input the second control signal. The second end of the second control unit is connected to the sixth end of the conversion module, and the third end 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 working voltage, and output the target level through the output node when conducting. The effect of improving the reliability of level conversion can be achieved.

[0061] The embodiment of the present application is described by taking the level conversion circuit used in electronic equipment as an example, which can be specifically used to perform level conversion on the MCU in the electronic equipment. However, it does not mean that the embodiment of the present application can only be used for level conversion in electronic equipment.

[0062] The level conversion circuit provided in the embodiment of the present application is explained in detail below.

[0063] Figure 2 This is a schematic diagram of the structure of a level conversion circuit provided by the present application. The level conversion circuit 100 can be applied to any electronic device that needs to convert a low voltage into a high voltage, and the present application embodiment does not limit this. Figure 2 An embodiment of the present 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 respectively 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 terminal and the second terminal of the conversion module 104 are respectively used to input the second working 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 end of the second control unit 103 is connected to the sixth end of the conversion module 104 , and the third end 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 configured to be turned on under the action of the second control signal and the first operating voltage.

[0070] Optionally, the second end of the second control unit 103 is also used as an output node of the level conversion circuit 100. Figure 1 The output node OUT is shown in FIG. The output node is used to connect to any possible external power load, which is not limited in the embodiment of the present application.

[0071] In this case, the second control unit 103 can be used to turn on under the action of the first control signal and the first operating voltage, and output the 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 (eg Figure 2The voltage level of VDDH shown in FIG. 1 is greater than the second operating voltage (eg Figure 2 For example, the voltage level of the first operating voltage may be 5V, and the voltage level of the second operating voltage may be any possible voltage level such as 1.8V or 3V, which is not limited in the embodiment of the present application.

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

[0074] Optionally, different branches may be provided in the pull-up module 101 to input the first operating voltage. In addition, different branches may also be provided in the conversion module 104. Generally, the number of branches in the conversion module 104 is the same as that 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 first control unit 102 and the second control unit 103 are provided in the circuit 100, two branches may be provided in the pull-up module 101 and the conversion module 104, respectively, and each branch may include a switch tube. This embodiment of the application is not limited to this.

[0076] Optionally, the first control unit 102 and the second control unit 103 may be used to reduce the pull-up capability of the pull-up module 101. The first control unit 102 and the second control unit 103 may 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 tube in the pull-up module 101. This embodiment of the application is not limited to this.

[0077] Specifically, at the same time, the first working voltage will only be input into one of the branches of the pull-up module 101 .

[0078] Optionally, the potential of the first control signal is opposite to that of the second control signal, which may specifically mean that at the same time, the potential of the first control signal is opposite to that of the second control signal. In general, the first control signal may be input to the second control unit while 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 be rectangular wave signals with opposite phases, the same period and frequency. That is, when the second control signal is at a high level, the first control signal is at a low level; when the second control signal is at a low level, the first control signal is at a high level. Moreover, because the potentials of the first control signal and the second control signal are opposite, the first control signal and the second control signal can be regarded as two signals with a phase difference of 180°.

[0080] Among them, the high level corresponding to the first control signal and the second control signal may be 1.8V, and the corresponding low level may be 0V, which is not limited in the embodiment of the present application.

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

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

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

[0084] The embodiment of the present application is described by taking the high level corresponding to the first control signal and the second control signal as 1.8V and the low level as 0V, and the first operating voltage as 5V and the second operating voltage as 1.8V as an example.

[0085] In the case of power-off state or sleep state, the pull-up module 101 has no first working voltage input, the conversion module 104 has no second working 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 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 sleep state, and in this case, the output node has no power output.

[0086] When the first control signal is at a high level and the second control signal is at a low level, the branch in the conversion module 104 connected in series with the first control unit 102 is turned off, and the branch in series with the second control unit 103 is turned on, so the voltage of the output node is pulled down to 0V. At the same time, under the action of the current conversion module 104, the first control unit 102 is operated, and the branch in the pull-up module 101 connected in series with the first control unit 102 is turned on, and the branch in series with the second control unit 103 is turned off, so that the second control unit 103 and the branch in series with the second control unit 103 in the pull-up module 101 are turned off. Specifically, the first working voltage can be applied to the third end (that is, the control node OUTN) of the pull-up module 101 through the pull-up module 101 and the first control unit 102, that is, the voltage of the control node OUTN is 5V, and the second control unit 103 and the branch in series with the second control unit 103 in the pull-up module 101 are turned off when the voltage of the control node OUTN is 5V.

[0087] In this case, the first working 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 0 V. That is, the voltage outputted by the circuit 100 is 0 V at this time.

[0088] When the first control signal is at a low level and the second control signal is at a high level, the branch in the conversion module 104 connected in series with the first control unit 102 is turned on, and the branch in series with the second control unit 103 is turned off, so the voltage of the third end (i.e., the control node OUTN) of the pull-up module 101 is pulled down to 0V. At the same time, under the action of the current conversion module 104, the second control unit 103 is operated, and the branch in the pull-up module 101 connected in series with the second control unit 103 is turned on, and the branch in series with the first control unit 102 is turned off, so that the first control unit 102 and the branch in series with the first control unit 102 in the pull-up module 101 are turned off. Specifically, the first working voltage can be applied to the output node via the pull-up module 101 and the second control unit 103, that is, the voltage of the output node is 5V, and the first control unit 102 and the branch in series with the first control unit 102 in the pull-up module 101 are turned off when the voltage of the output node is 5V.

[0089] In this case, the first operating voltage can 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 pulled up to 5 V. That is to say, the voltage outputted by the circuit 100 is 5 V. In this way, the circuit 100 can achieve the purpose of converting a low voltage into a high voltage output.

[0090] It is worth noting that, since the first control unit 102 and the second control unit 103 are added to the circuit 100 provided in the embodiment of the present application to reduce the pull-up capability of the pull-up module 101, the shut-down speed of the pull-up module 101 can be made faster. In this way, it is possible to avoid as much as possible the situation 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 turned on at the same time, 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 turned on at the same time. Therefore, it is possible to avoid the problem that the output signal cannot be flipped from a low voltage to a high voltage when the first control signal and / or the second control signal are switched between high and low levels.

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

[0092] Among them, since 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 shut-down speed, that is, when the first control signal is flipped from a high level to a low level and the second control signal is flipped from a low level to a high level, when the branch in the conversion module 101 connected in series with the first control unit 102 has not yet started, the branch in the pull-up module 101 connected in series with the first control unit 102 has been quickly shut down. Therefore, it can be avoided that when the first control signal and / or the second control signal is switched between high and low levels, the branches in series in the pull-up module 101 and the conversion module 104 are turned on at the same time, thereby causing the output signal to be unable to flip from a low voltage to a high voltage.

[0093] In this way, the reliability of level conversion can be improved.

[0094] In addition, since the circuit 100 provided in the embodiment of the present application can avoid the problem of 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 commonality is also avoided.

[0095] For a possible implementation, see Figure 3 The first control unit 102 is a first switch tube M1, and the second control unit 103 is a second switch tube M2.

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

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

[0098] Optionally, the first switch tube M1 and the second switch tube M2 may be P-channel switch tubes, such as PMOS tubes or any other possible switch tubes. In addition, in consideration of reducing costs, PMOS tubes may be preferred. This embodiment of the application is not limited to this.

[0099] Furthermore, the sizes and any other possible parameters of the first switch tube M1 and the second switch tube M2 can be the same, so that the switching speed and other performances of the first switch tube M1 and the second switch tube M2 can be the same or similar, thereby improving the symmetry and stability of the circuit 100. At the same time, the design complexity of the circuit 100 can also be reduced.

[0100] It is worth noting that, because both the first switch tube M1 and the second switch tube M2 are P-channel switch tubes, when the second control signal input to the gate of the first switch tube M1 is at a low level, and the branch in the conversion module 104 connected in series with the first switch tube M1 is turned on to output the first working voltage to the source of the first switch tube M1, the first switch tube M1 is turned on. When the first control signal input to the gate of the second switch tube M2 is at a low level, and the branch in the conversion module 104 connected in series with the second switch tube M2 is turned on to output the first working voltage to the source of the second switch tube M2, the second switch tube M2 is turned on.

[0101] It is worth noting that since the branches in the pull-up module 101 that are connected in series with the first control unit 102 and / or the second control unit 103 can all include switch tubes, therefore, when the first switch tube M1 and the branch connected in series with the first control unit 102 in the pull-up module 101 are connected in series, and when the second switch tube M2 and the branch connected in series with the second control unit 103 in the pull-up module 101 are connected in series, the width-to-length ratio of the switch tubes in each branch of the pull-up module 101 can be increased, thereby reducing the pull-up capacity of the pull-up module 101.

[0102] In this way, the pull-up module 101 can be turned off more quickly, thereby avoiding the problem that the output signal cannot be switched from a low voltage to a high voltage when the first control signal and / or the second control signal switches between high and low levels.

[0103] For a possible implementation, see Figure 4 The conversion module 104 includes a third switch tube M3 and a fourth switch tube M4.

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

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

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

[0107] The fourth switch tube M4 is used for being turned on when the second control signal meets the first preset voltage, and being turned off when the first control signal meets the second preset voltage.

[0108] Optionally, the third switch tube M3 and the fourth switch tube M4 may be N-channel switch tubes, such as NMOS tubes or any other possible switch tubes. In addition, in consideration of reducing the cost, NMOS tubes may be preferred. This embodiment of the present application does not limit this.

[0109] Furthermore, the sizes and any other possible parameters of the third switch tube M3 and the fourth switch tube M4 can be the same, so that the switching speeds and other performances of the third switch tube M3 and the fourth switch tube M4 can be 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 with the second operating voltage satisfies the conduction threshold of the third switch tube M3 and the fourth switch tube M4. And, the second preset voltage may refer to a voltage whose difference with the second operating voltage does not satisfy the conduction threshold of the third switch tube M3 and the fourth switch tube M4. It is specifically determined by the parameters of each device in the circuit 100 and / or the voltage level of each signal, and the embodiment of the present application is not limited to this.

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

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

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

[0114] It is worth noting that in the circuit 100 provided in the embodiment of the present application, since the source of the third switch tube M3 and the source of the fourth switch tube M4 are respectively used to input the first control signal and the second control signal, but are not directly grounded, the third switch tube M3 and the fourth switch tube M4 in the embodiment of the present application have a certain clamping capability. That is, in the process of the first control signal and the second control signal changing from a high level to a low level, the third switch tube M3 and the fourth switch tube 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, the pull-up module 101 has a faster turn-off speed. Therefore, when the first control signal and / or the second control signal is flipped between high and low levels, the third switch tube M3 and the fourth switch tube M4 are started more slowly and the pull-up module 101 is turned off more quickly. In this way, the possibility of the third switch tube M3 and the branch in the pull-up module 101 connected in series with the first control unit 102 being turned on at the same time, and the possibility of the fourth switch tube M4 and the branch in the pull-up module 101 connected in series with the second control unit 103 being turned on at the same time can be further reduced.

[0116] In this way, the reliability of level conversion can be further improved.

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

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

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

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

[0121] The sixth switch tube M6 is configured to be turned off when the third switch tube M3 is turned off, and to be turned on when the third switch tube M3 is turned on, so as to output the first operating voltage to the first control unit 102 .

[0122] Optionally, the fifth switch tube M5 and the sixth switch tube M6 may be P-channel switch tubes, such as PMOS tubes or any other possible switch tubes. In addition, in consideration of reducing the cost, PMOS tubes may be preferred. This embodiment of the application is not limited to this.

[0123] Furthermore, the sizes and any other possible parameters of the fifth switch tube M5 and the sixth switch tube M6 can be the same, so that the switching speeds and other performances of the fifth switch tube M5 and the sixth switch tube M6 can be the same or similar, thereby improving the symmetry and stability of the circuit 100.

[0124] It is worth noting that since the fifth switch tube M5 and the sixth switch tube M6 are both P-channel switch tubes, and the gate of the fifth switch tube M5 is connected to the second end (i.e., the above-mentioned output node) of the second control unit 103, when the fourth switch tube M4 is turned on and the voltage of the output node is pulled down, the gate voltage of the fifth switch tube M5 is a low voltage and the source voltage is a high voltage, and at this time, the turn-on threshold of the fifth switch tube M5 is met, and the fifth switch tube M5 is turned on. When the fourth switch tube M4 is turned off and the voltage of the output node is not pulled down, the voltage difference between the gate and the source of the fifth switch tube M5 does not meet the turn-on threshold of the fifth switch tube M5, and the fifth switch tube M5 is turned off.

[0125] Similarly, the gate of the sixth switch tube M6 is connected to the second end (that is, the control node) of the first control unit 102. Therefore, when the third switch tube M3 is turned on and the voltage of the control node is pulled down, the gate voltage of the sixth switch tube M6 is a low voltage and the source voltage is a high voltage. At this time, the turn-on threshold of the sixth switch tube M6 is met, and the sixth switch tube M6 is turned on. When the third switch tube M3 is turned off and the voltage of the control node is not pulled down, the voltage difference between the gate and the source of the sixth switch tube M6 does not meet the turn-on threshold of the sixth switch tube M6, and the sixth switch tube M6 is turned off.

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

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

[0128] It is worth noting that, since the fifth switch tube M5, the sixth switch tube M6, the first switch tube M1 and the second switch tube M2 are all P-channel switch tubes, and the fifth switch tube M5 is connected in series with the first switch tube M1, and the sixth switch tube M2 is connected in series with the second switch tube M2, the width-to-length ratio of the fifth switch tube M5, the sixth switch tube M6, the first switch tube M1 and the second switch tube M2 can be increased, thereby having a faster turn-off speed. In other words, when the first control signal flips from a high level to a low level and the second control signal flips from a low level to a high level, the fifth switch tube M5 and / or the first switch tube M1 are quickly turned off when the fourth switch tube M4 is not turned on.

[0129] In this way, the problem that the fifth switch tube M5, the first switch tube M1 and the fourth switch tube M4 are turned on at the same time, thereby causing the output signal to be unable to switch from a low voltage to a high voltage, can be avoided.

[0130] For a possible implementation, see Figure 5 The level conversion circuit 100 further includes: a level adjustment module 105 .

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

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

[0133] Optionally, the initial level signal may be a digital logic level signal output by any possible device or apparatus, and the initial level signal may also be a rectangular wave signal. Figure 5 The IN port input level adjustment module 105 shown in the figure is not limited in this embodiment of the present application.

[0134] It is understandable that the purpose of converting the initial level signal into the first control signal and the second control signal can be achieved in a variety of ways, so the level adjustment module 105 can also have different interfaces. The following are several possible implementations provided in the embodiments of the present application:

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

[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, and 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 end 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 phase and period of the initial level signal and the second control signal may be the same, and the initial level signal and the first control signal may have opposite phases 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 respectively, which is not limited in the embodiment of the present application.

[0140] It is important to understand that Figure 5 , although in Figure 5 The output end of the first inverter INV1 is connected to the third end of the conversion module 104 (the source of the third switch tube), and the output end of the second inverter INV2 is connected to the fourth end of the conversion module 104 (the source of the fourth switch tube M4). Figure 5 The structure shown is only an example. In practical applications, the output end of the first inverter INV1 can also be connected to the fourth end of the conversion module 104 (the source of the fourth switch tube M4), and the output end of the second inverter INV2 can be connected to the third end of the conversion module 104 (the source of the third switch tube M3). It is only necessary to ensure that the control signals output to the third switch tube M3 and the fourth switch tube M4 are level signals with opposite phases and the same period, and the embodiment of the present application is not limited to this.

[0141] In addition, since the first switch tube M1 also needs to input the second control signal, and the second switch tube M2 also needs to input the first control signal, it is also possible to Figure 5 As shown, the output end of the first inverter INV1 is connected to the gate of the second switch tube M2, and the output end of the second inverter INV2 is connected to the gate of the first switch tube M1, so as to synchronously output corresponding control signals to the first switch tube M1 and the second switch tube M2.

[0142] In order to more clearly and clearly describe the working principle of the circuit 100 in the embodiment of the present application, the following is based on Figure 4 and Figure 5 The specific connection relationship among the first switch tube M1, the second switch tube M2, the third switch tube M3, the fourth switch tube M4, the fifth switch tube M5, and the sixth switch tube M6 shown in FIG. 1 is explained.

[0143] For example, see Figure 5 When the input initial level signal is a low level (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 tube M3 and the fourth switch tube M4 are N-channel switch tubes, the third switch tube M3 is turned off and the fourth switch tube M4 is turned on, so that the voltage of the output node is pulled down to 0V. Because the fifth switch tube M5 and the first switch tube M1 are P-channel switch tubes, at this time, the gate voltage of the fifth switch tube M5 is 0V, and the source voltage is the first working voltage (5V), so the fifth switch tube M5 is turned on to output the first working voltage to the source of the first switch tube M1. Because the gate of the first switch tube M1 is the second control signal (0V), the first switch tube M1 is turned on, so that the voltage of the control node OUTN is 5V. Since the sixth switch tube M6 and the second switch tube M2 are P-channel switch tubes, at this time, the gate voltage of the sixth switch tube M6 is 5V, the sixth switch tube M6 is turned off, and then the second switch tube M2 is turned off, and at this time the voltage of the output node remains 0V.

[0144] When the input initial level signal is a high level (1.8V), the first inverter INV1 outputs a low level (0V), and the second inverter INV2 outputs a high level (1.8V). At this time, since the third switch tube M3 and the fourth switch tube M4 are N-channel switch tubes, the third switch tube M3 is turned on and the fourth switch tube M4 is turned off, so that the voltage of the control node OUTN is pulled down to 0V. Because the sixth switch tube M6 and the second switch tube M2 are P-channel switch tubes, at this time, the gate voltage of the sixth switch tube M6 is 0V, and the source voltage is the first working voltage (5V), so the sixth switch tube M6 is turned on to output the first working voltage to the source of the second switch tube M2. Because the gate of the second switch tube M2 is the first control signal (0V), the second switch tube M2 is turned on, so that the voltage of the output node is 5V. Since the fifth switch tube M5 and the first switch tube M1 are P-channel switch tubes, at this time, the gate voltage of the fifth switch tube M5 is 5V, the fifth switch tube M5 is turned off, and then the first switch tube M is turned off, and the voltage of the control node remains 0V.

[0145] Based on the above working principle, the present application embodiment also provides a possible signal timing diagram, see Figure 6 It can be seen that when the initial level signal input from the IN port is a low level of 0V, the target level output from the output node is also a low level of 0V. When the initial level signal input from the IN port is a high level of 1.8V, the target level output from the output node is a high level of 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 end of the third inverter INV3 is used to input the initial level signal, the first power supply end of the third inverter INV3 is used to input the second operating voltage, the second power supply end of the third inverter INV3 is grounded, and the output end of the third inverter INV3 is connected to the third end or the fourth end of the conversion module 104.

[0149] The third inverter INV3 is used for adjusting the potential of the initial level signal and outputting 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, and at the same time, 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 with the initial level signal.

[0151] It should be understood that if the output end of the third inverter INV3 is connected to the third end of the conversion module 104, the initial level signal can also be directly input to the fourth end 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 end of the third inverter INV3 is connected to the fourth end of the conversion module 104, the initial level signal can also be directly input to the third end 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] That is, the third inverter INV3 can output the adjusted level signal to the third end of the conversion module 104, and can also output the adjusted level signal to the fourth end of the conversion module 104. It is only necessary to ensure that the control signals output to the third switch tube M3 and the fourth switch tube M4 are level signals with opposite phases and the same period, and the embodiment of the present application is not limited to this.

[0154] In addition, since the first switch tube M1 also needs to input the second control signal, and the second switch tube M2 also needs to input the first control signal, the output end of the third inverter INV3 can also be connected to the gate of one of the first switch tube M1 and the second switch tube M2 as shown in the above figure, and can be directly connected to the gate of the other switch tube of the first switch tube M1 and the second switch tube M2 according to actual conditions, so as to synchronously output corresponding control signals to the first switch tube M1 and the second switch tube M2. This embodiment of the application is not limited to this.

[0155] As can be seen from the above, the embodiment of the present application provides multiple ways to output the first control signal and the second control signal to the circuit 100, so as to stably and reliably control the on or off of each switch tube in the circuit 100. In this way, the flexibility and practicality of the circuit 100 can be improved.

[0156] For a possible implementation, see Figure 8 , the circuit 100 also includes a buffer 106 .

[0157] An input terminal of the buffer 106 is connected to the output node, a first output terminal of the buffer 106 is used to output a first voltage, and a second output terminal of the 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 Figure 8 , the buffer 106 may include a fourth inverter INV4 and a fifth inverter INV5.

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

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

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

[0163] It is understandable that, since there may be multiple different electrical loads or electrical units in some electronic devices that need to use the target level, but each electrical unit may require a different phase or each electrical unit may require a different potential at the same time, therefore, setting the fourth inverter INV4 and the fifth inverter INV5 can obtain two signals with different phases based on the target level, and then the signals output by the fourth inverter INV4 and the fifth inverter INV5 can be output to different electrical units respectively to meet the different needs of each electrical unit in the electronic device. In addition, the buffer 106 also has a certain amplification capability, so the buffer 106 can also enhance the driving capability of the target level.

[0164] In this way, the practicality and flexibility of the circuit 100 can be improved.

[0165] The following is a description of the electronic device provided for executing the present application. The electronic device and the above-mentioned level conversion circuit have the same concept. Its specific implementation process and technical effects refer to the relevant description in the corresponding embodiment of the above-mentioned level conversion circuit, which will not be repeated in detail below.

[0166] An embodiment of the present application further provides an electronic device, which at least includes the level conversion circuit 100 provided in any one of the above embodiments.

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

[0168] Optionally, the electronic device may further include any possible power-consuming units, and the target level output by the level conversion circuit 100 may be output to these power-consuming units so as to supply power to each power-consuming unit.

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

[0170] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

[0171] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A level conversion circuit, characterized in that: The level conversion 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 to input a 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 end and the second end of the conversion module are respectively used to input the second working voltage, the third end of the conversion module is used to input the first control signal, and the fourth end of the conversion module is used to input the second control signal; the conversion module is used to control the pull-up module to output the first working voltage to the first control unit or the second control unit; The second end of the first control unit is connected to the fifth end of the conversion module, and the third end of the first control unit is used to input the second control signal; the first control unit is used to be turned on under the action of the second control signal and the first working voltage; The second end of the second control unit is connected to the sixth end of the conversion module, and the third end of the second control unit is used to input the first control signal; the second end of the second control unit is also used as an output node of the level conversion circuit; The second control unit is used to be turned on under the action of the first control signal and the first working voltage, and to output the 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.

2. The level conversion circuit according to claim 1, characterized in that: The first control unit is a first switch tube, and the second control unit is a second switch tube; The source of the first switch tube is connected to the third end of the pull-up module, the drain of the first switch tube is connected to the fifth end of the conversion module, and the gate of the first switch tube is used to input the second control signal; The source of the second switch tube is connected to the fourth end of the pull-up module, the drain of the second switch tube is connected to the sixth end of the conversion module, and the gate of the second switch tube is used to input the first control signal.

3. The level conversion circuit according to claim 1, characterized in that: The conversion module includes a third switch tube and a fourth switch tube; The gate of the third switch tube is used to input the second working voltage, the source of the third switch tube is used to input the first control signal, and the drain of the third switch tube is connected to the second end of the first control unit; the third switch tube is used to be turned on when the first control signal meets the first preset voltage, and turned off when the first control signal meets the second preset voltage; The gate of the fourth switch tube is used to input the second working voltage, the source of the fourth switch tube is used to input the second control signal, and the drain of the fourth switch tube is connected to the second end of the second control unit; the fourth switch tube is used to be turned on when the second control signal meets the first preset voltage, and turned off when the first control signal meets the second preset voltage; The first preset voltage is lower than the second preset voltage.

4. The level conversion circuit according to claim 3, characterized in that: The pull-up module includes a fifth switch tube and a sixth switch tube; The source of the fifth switch tube is used to input the first working voltage, the drain of the fifth switch tube is connected to the first end of the first control unit, and the gate of the fifth switch tube is connected to the second end of the second control unit and the drain of the fourth switch tube respectively; the fifth switch tube is used to be turned off when the fourth switch tube is turned off, and turned on when the fourth switch tube is turned on, so as to output the first working voltage to the first control unit; The source of the sixth switch tube is used to input the first operating voltage, the drain of the sixth switch tube is connected to the first end of the second control unit, and the gate of the sixth switch tube is respectively connected to the second end of the first control unit and the drain of the third switch tube; the sixth switch tube is used to be turned off when the third switch tube is turned off, and to be turned on when the third switch tube is turned on, so as to output the first operating voltage to the first control unit.

5. The level conversion circuit according to claim 1, wherein: The level conversion circuit further includes: a level adjustment module; The first end of the level adjustment module is used to input an initial level signal, the second end of the level adjustment module is connected to the third end of the conversion module, and the third end of the level adjustment module is connected to the fourth end of the conversion module; The level adjustment module is used for converting the initial level signal into the second control signal and the first control signal, and outputting the second control signal and the first control signal to the conversion module respectively.

6. The level conversion circuit according to claim 5, characterized in that: The level adjustment module comprises: a first inverter and a second inverter; the input end of the first inverter is used to input the initial level signal, the first power supply end of the first inverter is used to input the second working voltage, the second power supply end of the first inverter is grounded, and the output end of the first inverter is respectively connected to the input end of the conversion module and the second inverter; 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 working 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 according to claim 5, characterized in that: The level adjustment module comprises: a third inverter; The input end of the third inverter is used to input the initial level signal, the first power supply end of the third inverter is used to input the second working voltage, the second power supply end of the third inverter is grounded, and the output end of the third inverter is connected to the third end or the fourth end 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 according to claim 1, characterized in that: The circuit also includes a buffer; The input end of the buffer is connected to the output node, the first output end of the buffer is used to output a first voltage, and the second output end 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 to 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 and the second control signal have opposite potentials.

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

Images