Level conversion circuit, mainboard or electronic device

Abstract

The utility model discloses a level conversion circuit, mainboard and electronic equipment, wherein, level conversion circuit includes voltage comparison module for receiving input signal, and threshold setting module for setting voltage threshold, voltage comparison module sets into, can through comparing the voltage size of input, output voltage or current, to when comparing input signal with voltage threshold that threshold setting module sets, can decide whether output control signal of level conversion according to the comparison result. Therefore, the level conversion circuit of the application can control the timing of level conversion, and can realize accurate level conversion and improve the reliability of the circuit.

Description

Technical Field

[0001] This utility model relates to the field of electronic technology, specifically to a level conversion circuit, motherboard, or electronic device. Background Technology

[0002] With the development of the automotive industry, the functions integrated into automotive controllers are becoming increasingly rich. Communication between functional modules in different voltage domains is a common requirement. For this kind of cross-voltage domain communication, level conversion circuits must be used to avoid communication failures or device damage caused by level conflicts.

[0003] Traditional level conversion circuits are generally based on transistors or field-effect transistors. When the input signal meets the turn-on or turn-off conditions of the transistor or field-effect transistor, the transistor or field-effect transistor is turned on or off, thereby realizing level conversion.

[0004] However, traditional level conversion circuits cannot adjust the timing of level conversion; the timing of level conversion is determined by the parameters of the field-effect transistor itself. Utility Model Content

[0005] To solve at least one of the aforementioned problems, according to one aspect of the present invention, a level conversion circuit is provided.

[0006] The level conversion circuit includes a voltage comparison module for receiving input signals and a threshold setting module for setting voltage thresholds. The voltage comparison module is configured to output voltage or current by comparing the magnitude of the input voltage, so that when comparing the input signal with the voltage threshold set by the threshold setting module, it can determine whether to output a control signal to control level conversion based on the comparison result.

[0007] Therefore, the level conversion circuit of this application can compare the input signal with the voltage threshold set by the threshold setting module through the voltage comparison module. When the input signal reaches the voltage threshold, the voltage comparison module outputs a control signal that controls the level conversion; when the input signal does not reach the voltage threshold, the voltage comparison module does not output a control signal to control the level conversion, thereby controlling the timing of the level conversion. This makes the level conversion circuit of this application more suitable for highly flexible automotive ECU component products, such as driver assistance controllers, cockpit controllers, and integrated cockpit-driver controllers.

[0008] In some embodiments, the level conversion circuit further includes a push-pull module, which is configured to achieve bidirectional active driving capability based on the magnitude of the received control signal, so as to output an output signal capable of controlling level conversion according to the control signal. Therefore, the level conversion circuit of this application can not only control the timing of level conversion, but also improve the edge speed of the output signal.

[0009] In some implementations, the voltage comparator module is an operational amplifier. Operational amplifiers offer high precision and good temperature stability, enabling accurate level shifting and improving circuit reliability. Furthermore, their high input impedance reduces input signal loss.

[0010] In some implementations, the push-pull module is implemented as a push-pull circuit or a device developed based on push-pull characteristics. This allows the level conversion circuit of this application to control the timing of level conversion while also improving the edge speed of the output signal.

[0011] In some implementations, the non-inverting input of the operational amplifier is used to receive the input signal, the inverting input is connected to the threshold setting module, and the positive and negative power supply terminals of the operational amplifier are connected to the positive and negative terminals of a first power supply, respectively. Thus, with power supplied by the first power supply, the operational amplifier can compare the input signal with the voltage threshold set by the threshold setting module, thereby controlling the timing of the control signal output.

[0012] In some implementations, push-pull circuits include symmetrical devices with opposite polarities. This allows for efficient conversion of control signals to output signals, improving the edge speed of the output signal.

[0013] In some implementations, the level conversion circuit further includes a protection module that connects the output of the operational amplifier to the signal receiving end of the push-pull circuit. This protection module can thus protect the push-pull circuit.

[0014] In some implementations, the symmetrical devices with opposite polarities include PNP transistors and NPN transistors; the bases of the PNP and NPN transistors are used to receive control signals; the emitters of the PNP and NPN transistors are used to output signals; and the collectors of the PNP and NPN transistors are connected to the positive and negative terminals of the first power supply, respectively. This ensures efficient conversion of control signals to output signals while maintaining a simple structure, and also improves the edge speed of the output signal.

[0015] In some embodiments, the push-pull circuit further includes a speed adjustment module for adjusting the rising and / or falling edge speeds of the output signal. Therefore, the level conversion circuit of this application can not only increase the edge speed of the output signal, but also adjust the rising and / or falling edge speeds of the output signal as needed.

[0016] In some implementations, the speed regulation module includes a third resistor that connects the collector of the PNP transistor to the positive terminal of the first power supply. Thus, the rising edge speed can be adjusted via the third resistor.

[0017] In some implementations, the speed regulation module includes a fourth resistor that connects the collector of the NPN transistor to the negative terminal of the first power supply. Thus, the falling edge speed can be adjusted via the fourth resistor.

[0018] In some implementations, the threshold setting module includes a first resistor and a second resistor that connect the inverting input terminal of the operational amplifier to the positive and negative terminals of a first power supply, respectively. Thus, the comparison voltage threshold of the input signal can be set using the first and second resistors. By adjusting the voltage division ratio of the first power supply using the first and second resistors, the timing of the operational amplifier outputting the control signal can be controlled, thereby allowing the timing of the control signal output to be adjusted as needed.

[0019] According to one aspect of this utility model, a motherboard is provided that includes the aforementioned level conversion circuit. Thus, a motherboard including the level conversion circuit of this application can compare the input signal with a voltage threshold set by a threshold setting module using an operational amplifier, thereby controlling the timing of level conversion; moreover, it can achieve precise level conversion, improve circuit reliability, and reduce input signal loss.

[0020] According to one aspect of this utility model, an electronic device is provided, which includes the aforementioned level conversion circuit or the aforementioned motherboard. Thus, an electronic device including the level conversion circuit or motherboard of this application can compare an input signal with a voltage threshold set by a threshold setting module using an operational amplifier, thereby controlling the timing of level conversion. Attached Figure Description

[0021] Figure 1 This is a circuit diagram of a traditional level conversion circuit (field-effect transistor type);

[0022] Figure 2 This is a schematic diagram of the edge-accelerated level conversion circuit topology based on voltage detection according to one embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of an edge-accelerated level conversion circuit based on voltage detection according to one embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of an edge-accelerated level conversion circuit based on voltage detection, according to another embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of an edge-accelerated level conversion circuit based on voltage detection, which is another embodiment of this utility model.

[0026] Reference numerals: q1, Field-effect transistor; r1, Resistor I; r2, Resistor II; r3, Resistor III; v1, Power supply I; v2, Power supply II; U1, Operational amplifier; R1, First resistor; R2, Second resistor; V1, First power supply; Q1, PNP transistor; Q2, NPN transistor; R3, Third resistor; R4, Fourth resistor; R5, Fifth resistor. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0028] It should also be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising" or "including" include not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element. The terminology used herein is generally that commonly used by those skilled in the art; in case of any discrepancy with commonly used terminology, the terminology used herein shall prevail.

[0029] Furthermore, for ease of description, spatial relative terms such as “below,” “under,” “lower,” “above,” and “upper” may be used herein to describe the relationship between one element or component and another (or other) element or component as shown in the figure. In addition to the orientation shown in the figure, spatial relative terms are intended to include different orientations of the device during use or operation. The device may be oriented in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptors used herein can be interpreted accordingly.

[0030] In this article, the term "level conversion circuit" refers to a key module in electronic design used to resolve signal compatibility issues between devices in different voltage domains. Its main function is to safely convert one logic level to another, ensuring reliable signal transmission and electrical safety.

[0031] In this article, the term "push-pull circuit" refers to a very common power amplifier or switching circuit structure. Its core idea is to use two symmetrical or complementary semiconductor devices (typically transistors, such as BJTs (Bipolar Junction Transistors) or MOSFETs (Metal Oxide Semiconductor Field-Effect Transistors)) that work alternately. One device "pushes" the current (i.e., pulls the current, outputting a positive half-cycle signal or providing positive current), while the other "pulls" the current (i.e., sinks the current, outputting a negative half-cycle signal or providing a negative current / return path), thereby synthesizing a complete output signal at the load or achieving efficient energy conversion.

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] For example, Figure 1 This diagram schematically illustrates a commonly used level shifting circuit in the prior art. The gate of field-effect transistor (FET) q1 is connected to the first terminal of resistor IIr2; the drain of FET q1 is connected to the first terminal of resistor IIIr3 and the output signal; the first terminal of resistor Ir1 is connected to the input signal and the source of FET q1; the second terminal of resistor Ir1 is connected to the second terminal of resistor IIr2 and the positive terminal of power supply Iv1; the second terminal of resistor IIIr3 is connected to the positive terminal of power supply IIv2; and the negative terminals of power supplies Iv1 and IIv2 are grounded. This level shifting circuit achieves level shifting through FET q1, resistors Ir1, IIr2, and IIIr3.

[0034] While the aforementioned level conversion circuit has advantages in terms of simplicity and cost, it still has some limitations. For example, the timing of level conversion cannot be adjusted using the aforementioned level conversion circuit: when the input signal is compared with the power supply Iv1, the level conversion of the output signal can be completed once the condition for the field-effect transistor q1 to turn on or off is met. In other words, the timing of level conversion is determined by the parameters of the field-effect transistor q1 itself.

[0035] To address the aforementioned issues, this application uses an operational amplifier to compare the input signal with a set voltage threshold, and determines whether to output a control signal for level transition based on the comparison result, thereby controlling the timing of the level transition. Figure 2 The schematic diagram illustrates the core concept of this application. The level conversion circuit of this application also includes a push-pull circuit. The operating state of the push-pull circuit is controlled by a control signal output from an operational amplifier. For example, the push-pull circuit outputs different output signals according to different control signals, thereby accelerating the edge of the output signal.

[0036] Figure 3 The level conversion circuit according to the first embodiment of the present invention is shown schematically.

[0037] like Figure 3 As shown, the level conversion circuit includes an operational amplifier U1 and a threshold setting module. The operational amplifier U1 receives the input signal. The threshold setting module sets the voltage threshold. The operational amplifier U1 is configured to compare the input signal with the voltage threshold set by the threshold setting module, and determine whether to output a control signal for level conversion based on the comparison result.

[0038] Because the level conversion circuit of this application can compare the input signal with the voltage threshold set by the threshold setting module through operational amplifier U1, when the input signal reaches the voltage threshold, operational amplifier U1 outputs a control signal that controls the level conversion; when the input signal does not reach the voltage threshold, operational amplifier U1 will not output a control signal to control the level conversion, thereby controlling the timing of the level conversion. Moreover, because operational amplifier U1 has high precision and good temperature stability, it can achieve accurate level conversion and improve the reliability of the circuit. At the same time, the high input impedance characteristic of operational amplifier U1 can also reduce the loss of input signal. Therefore, the level conversion circuit of this application is more suitable for application in highly flexible automotive ECU (Automotive Electronic Control Unit) component products, such as driver assistance controllers, cockpit controllers, and cockpit-driver integrated controllers.

[0039] In some embodiments, continue to refer to Figure 3 As shown, the non-inverting input of operational amplifier U1 is used to receive the input signal, and the inverting input of operational amplifier U1 is connected to the threshold setting module. The positive and negative power supply terminals of operational amplifier U1 are connected to the positive and negative terminals of the first power supply V1, respectively. Therefore, when the first power supply V1 provides power, operational amplifier U1 can compare the input signal with the voltage threshold set by the threshold setting module, thereby controlling the timing of the control signal output.

[0040] Figure 3 An exemplary embodiment of the threshold setting module of this application is shown, such as... Figure 3 As shown, the threshold setting module of this application includes a first resistor R1 and a second resistor R2. The first resistor R1 and the second resistor R2 connect the inverting input terminal of operational amplifier U1 to the positive and negative terminals of the first power supply V1, respectively. The first resistor R1 and the second resistor R2 are used to divide the voltage of the first power supply V1. The threshold voltage is compared to the voltage value V2 formed by the lower pin of the first resistor R1 (or the upper pin of the second resistor R2), where V2 = V1 * R2 / (R1 + R2). Operational amplifier U1 compares the relative magnitude of the input signal with V2. When the input signal is greater than V2, operational amplifier U1 outputs a high level; when the input signal is less than V2, operational amplifier U1 outputs a low level. By adjusting the voltage division ratio of the first power supply V1 using the first resistor R1 and the second resistor R2, the timing of the operational amplifier U1 outputting the control signal can be controlled, thus allowing adjustment of the output timing of the control signal as needed.

[0041] In some embodiments, such as Figure 3 As shown, the level conversion circuit also includes a push-pull circuit, which can output different output signals according to different control signals, and the output signals can control the level conversion. Since traditional level conversion circuits achieve level conversion by turning transistors or field-effect transistors on or off, the adjustment of the rising and falling edges of the output signal level is very limited. This application incorporates a push-pull circuit in the level conversion circuit, enabling the circuit to control the timing of level conversion while also improving the edge speed of the output signal; simultaneously, the push-pull circuit provides strong output drive capability, suitable for various output load conditions; and, because the operational amplifier U1 has low output impedance, it can better drive the push-pull circuit.

[0042] Figure 3 A push-pull circuit according to one embodiment of this application is illustrated by way of example. Figure 3 As shown, the push-pull circuit includes symmetrical devices with opposite polarities to achieve efficient conversion of control signals to output signals and improve the edge speed of the output signal. In some embodiments, the symmetrical devices with opposite polarities include a PNP transistor Q1 and an NPN transistor Q2; the bases of the PNP transistor Q1 and the NPN transistor Q2 are used to receive control signals; the emitters of the PNP transistor Q1 and the NPN transistor Q2 are used to output signals; and the collectors of the PNP transistor Q1 and the NPN transistor Q2 are connected to the positive and negative terminals of the first power supply, respectively. Because this application connects the PNP transistor Q1 and the NPN transistor Q2 in specific positions, it ensures efficient conversion of control signals to output signals with a simple structure, while simultaneously improving the edge speed of the output signal.

[0043] In some embodiments, continue to refer to Figure 3As shown, the push-pull circuit further includes a speed adjustment module for adjusting the rising edge speed and / or falling edge speed of the output signal. In some embodiments, the speed adjustment module includes a third resistor R3 connecting the collector of PNP transistor Q1 to the positive terminal of the first power supply V1, so as to adjust the rising edge speed through the third resistor R3. In some embodiments, the speed adjustment module includes a fourth resistor R4 connecting the collector of NPN transistor Q2 to the negative terminal of the first power supply V1, so as to adjust the falling edge speed through the fourth resistor R4. When the level conversion circuit of this application is working, the operational amplifier U1 compares the relative magnitude of the input signal with V2. When the input signal is greater than V2, the operational amplifier U1 outputs a high level, controlling the PNP transistor Q1 of the push-pull circuit to turn on and the NPN transistor Q2 to turn off. At this time, the output signal is pulled high to the first power supply V1 by the third resistor R3. When the input signal is less than V2, the operational amplifier U1 outputs a low level, controlling the NPN transistor Q2 to turn on and the PNP transistor Q1 to turn off. At this time, the output signal is pulled low to 0 level by the fourth resistor R4. Ideally, when the input signal equals V2, the operational amplifier should not output a level. However, due to manufacturing differences, various situations may occur, such as outputting a high level, a low level, or no output. To avoid these situations, we can select appropriate first resistor R1 and second resistor R2 to prevent the output signal from equaling V2. Traditional transistor or MOSFET level shifting circuits have very limited adjustment for the rising and falling edges of the output signal level, such as... Figure 1 As shown, to achieve a low-level active transition, the third resistor R3 connected to the second power supply V2 cannot be too small. This limits the rising edge speed of the output signal, making it unsuitable for applications requiring a fast rising edge. This application's voltage-detection-based edge-acceleration level conversion circuit introduces an operational amplifier U1 and a push-pull circuit. Based on the comparison between the voltage at the input of operational amplifier U1 and the input signal, the operating timing of operational amplifier U1 is controlled, thereby controlling different operating conditions of the push-pull circuit. This achieves level conversion while accelerating the edge of the output signal. This strategy offers greater flexibility, especially for signals with edge speed requirements, better meeting the evolving needs of modern automotive controller electronic systems.

[0044] In some embodiments, such as Figure 3 As shown, the level conversion circuit also includes a protection module that connects the output of operational amplifier U1 to the signal receiving terminal of the push-pull circuit. The protection module can be, for example, a fifth resistor R5. When the push-pull circuit includes the aforementioned PNP transistor Q1 and NPN transistor Q2, the fifth resistor R5 is connected to the base of both PNP and NPN transistors Q1 and Q2. As the base current-limiting resistor for PNP and NPN transistors Q1 and Q2, the fifth resistor R5 provides protection for them.

[0045] In other embodiments, the aforementioned level-shifting circuit function can be implemented using an IC (integrated circuit) with internally integrated operational amplifiers and push-pull circuits, or an IC with internally integrated CMOS (complementary metal-oxide-semiconductor) circuitry. However, compared to the aforementioned level-shifting circuit, such an IC is less flexible and more expensive.

[0046] In some embodiments, operational amplifier U1 constitutes a voltage comparison module according to an embodiment of this application; the voltage comparison module is configured to output voltage or current by comparing the magnitude of the input voltage, so that when comparing the input signal with the voltage threshold set by the threshold setting module, it can determine whether to output a control signal for level conversion based on the comparison result.

[0047] In other embodiments, the voltage comparison module can also be implemented as a voltage comparison device. For example, a voltage comparison device based on an operational amplifier; or a dedicated voltage comparator such as the LM339 or LM311; or a current sense amplifier with an integrated comparator, for example, by embedding a comparator in a current sense amplifier such as the CSA315.

[0048] In some other embodiments, the voltage comparison module can also be implemented as a voltage comparison circuit based on transistors and field-effect transistors. This voltage comparison circuit can be implemented using methods commonly found in the prior art, and this application does not limit the specific implementation method of the voltage comparison circuit.

[0049] In some embodiments, the push-pull circuit constitutes a push-pull module according to an embodiment of this application; the push-pull module is configured to achieve bidirectional active driving capability according to the magnitude of the received control signal.

[0050] In other embodiments, such as Figure 4 As shown, the transistors in the push-pull circuit can be replaced with field-effect transistors (FETs), specifically, the PNP transistor Q1 is replaced by the first FET Q3, and the NPN transistor Q2 is replaced by the second FET Q4. The gates of the first FET Q3 and the second FET Q4 are connected to one end of the fifth resistor R5. The output terminal of the operational amplifier U1 is connected to the other end of the fifth resistor R5. The source of the first FET Q3 and the drain of the second FET Q4 are used for output signals. The drain of the first FET Q3 and the source of the second FET Q4 are connected to the positive and negative terminals of the first power supply V1, respectively.

[0051] In some other embodiments, the push-pull module can also be implemented as a device developed based on push-pull characteristics, such as an IC with push-pull characteristics (e.g., Figure 5(As shown); the input terminal of the push-pull IC is connected to one end of the fifth resistor R5; the output terminal of the operational amplifier U1 is connected to the other end of the fifth resistor R5; the push-pull IC is also connected to the positive and negative terminals of the first power supply V1; the push-pull IC also has an output terminal for the output signal. Push-pull is an output stage circuit structure composed of two complementary switching devices (such as NPN / PNP transistors or N / P-channel MOSFETs), responsible for "pushing" (output high level) and "pushing" (output low level) the current, respectively. The push-pull characteristic achieves efficient bidirectional drive through the alternating conduction of complementary devices. Therefore, devices developed based on push-pull characteristics can be implemented as: for example, basic switching devices such as push-pull output stage transistor pairs (e.g., NPN+PNP bipolar transistors (BJTs) or NMOS+PMOS power MOSFETs), digital logic gate circuits (e.g., CMOS inverters of model 74HC04); power drive modules such as half-bridge / full-bridge (H-bridge) driver ICs (e.g., half-bridge driver of model IR2104), motor drivers (e.g., dual H-bridge of model DRV8833); power management devices such as DC-DC converter switches (e.g., flyback converters), linear regulators; signal isolation and interfaces such as digital isolators and RS-485 transceivers; RF and audio power devices such as Class B audio amplifiers and RF power amplifiers (PA); and special application devices such as LED driver ICs and piezoelectric ceramic drivers.

[0052] According to another aspect of this utility model, a motherboard is provided that includes the aforementioned level conversion circuit. Thus, a motherboard including the level conversion circuit of this application can compare the input signal with a voltage threshold set by a threshold setting module using an operational amplifier, thereby controlling the timing of level conversion; moreover, it can achieve precise level conversion, improve circuit reliability, and reduce input signal loss.

[0053] According to another aspect of this utility model, an electronic device is provided, which includes the aforementioned level conversion circuit, or includes the aforementioned motherboard. Thus, an electronic device including the level conversion circuit or motherboard of this application can compare an input signal with a voltage threshold set by a threshold setting module using an operational amplifier, thereby controlling the timing of level conversion.

[0054] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A level conversion circuit, characterized in that, include: Voltage comparison module for receiving input signals; And a threshold setting module for setting voltage thresholds; The voltage comparison module is configured to output voltage or current by comparing the magnitude of the input voltage, so that when comparing the input signal with the voltage threshold set by the threshold setting module, it can determine whether to output a control signal for level conversion based on the comparison result.

2. The level conversion circuit according to claim 1, characterized in that, It also includes a push-pull module, which is configured to achieve bidirectional active driving capability based on the magnitude of the received control signal, so as to output an output signal capable of controlling level conversion according to the control signal; and / or The voltage comparison module is an operational amplifier (U1).

3. The level conversion circuit according to claim 2, characterized in that, The push-pull module is implemented as a push-pull circuit or a device developed based on push-pull characteristics; and / or The non-inverting input of the operational amplifier (U1) is used to receive the input signal, the inverting input of the operational amplifier (U1) is connected to the threshold setting module, and the positive and negative power supply terminals of the operational amplifier (U1) are connected to the positive and negative terminals of the first power supply (V1), respectively.

4. The level conversion circuit according to claim 3, characterized in that, The push-pull circuit includes symmetrical devices with opposite polarities; and / or It also includes a protection module that connects the output of the operational amplifier (U1) to the signal receiving end of the push-pull circuit.

5. The level conversion circuit according to claim 4, characterized in that, The symmetrical devices with opposite polarities include PNP transistors (Q1) and NPN transistors (Q2); The bases of the PNP transistor (Q1) and NPN transistor (Q2) are used to receive control signals; The emitters of PNP transistors (Q1) and NPN transistors (Q2) are used to output signals; The collectors of the PNP transistor (Q1) and NPN transistor (Q2) are connected to the positive and negative terminals of the first power supply (V1), respectively.

6. The level conversion circuit according to claim 5, characterized in that, The push-pull circuit also includes a speed adjustment module for adjusting the rising and / or falling edge speeds of the output signal.

7. The level conversion circuit according to claim 6, characterized in that, The speed regulation module includes a third resistor (R3) that connects the collector of the PNP transistor (Q1) to the positive terminal of the first power supply (V1); and / or The speed regulation module includes a fourth resistor (R4) that connects the collector of the NPN transistor (Q2) to the negative terminal of the first power supply (V1).

8. The level conversion circuit according to any one of claims 3 to 7, characterized in that, The threshold setting module includes a first resistor (R1) and a second resistor (R2) that connect the inverting input terminal of the operational amplifier (U1) to the positive and negative terminals of the first power supply (V1), respectively.

9. A motherboard, characterized in that, Includes the level conversion circuit according to any one of claims 1 to 8.

10. An electronic device, characterized in that, Including the level conversion circuit as described in any one of claims 1 to 8, or Includes the motherboard as described in claim 9.

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