A signal conversion circuit and electronic device

Abstract

The application provides a signal conversion circuit and electronic equipment, and relates to the technical field of signal conversion. The signal conversion circuit comprises a driving module and a main circuit module, the main circuit module comprises a switch, and the driving module is electrically connected with the switch; the driving module is further used for receiving a first signal; the main circuit module further comprises an input end and an output end, the switch is connected with the input end and the output end respectively, the input end is used for receiving a second signal, the output end is used for connecting a load, and the voltage values of the first signal and the second signal are different; wherein, the driving module is used for driving the on-off state of the switch according to the first signal; when the switch is turned on, the main circuit module is used for transmitting the second signal to the load. The signal conversion circuit and electronic equipment provided by the application have the advantages of low cost and strong circuit compatibility.

Description

Technical Field

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

[0002] The time synchronization signal PPS (Pulse Per Second) provides the function of time synchronization in different systems. Different systems have different level requirements, which are usually achieved by integrating a voltage comparator to realize level conversion and signal isolation.

[0003] However, on the one hand, the integrated voltage comparators from different manufacturers have incompatible packages, making immediate replacement impossible when materials are difficult to procure, requiring PCB modifications and extending the development cycle. On the other hand, automotive-grade integrated voltage comparators are expensive and easily damaged by external interference.

[0004] In summary, existing technologies for level conversion of time synchronization signals suffer from poor compatibility of conversion devices and high costs. Summary of the Invention

[0005] The purpose of this application is to provide a signal conversion circuit and electronic device to solve the problems of poor compatibility and high cost of conversion devices in the prior art when level conversion is performed.

[0006] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows:

[0007] On one hand, embodiments of this application provide a signal conversion circuit, which includes a driving module and a main circuit module. The main circuit module includes a switch, and the driving module is electrically connected to the switch. The driving module is also used to receive a first signal. The main circuit module further includes an input terminal and an output terminal. The switch is connected to the input terminal and the output terminal respectively. The input terminal is used to receive a second signal, and the output terminal is used to connect to a load. The voltage values ​​of the first signal and the second signal are different.

[0008] The driving module is used to drive the on / off state of the switch according to the first signal;

[0009] When the switch is turned on, the main circuit module is used to transmit the second signal to the load.

[0010] Optionally, the main circuit module further includes a clamping element, one end of which is electrically connected to the output terminal and the other end is grounded.

[0011] Optionally, the main circuit module further includes a current-limiting resistor, one end of which is electrically connected to the switch and the other end of which is electrically connected to the output terminal.

[0012] Optionally, the main circuit module further includes a fixed impedance resistor, one end of which is electrically connected to the output terminal and the other end is grounded.

[0013] Optionally, the main circuit module further includes a diode, the anode of which is electrically connected to the input terminal, and the cathode of which is electrically connected to the switch.

[0014] Optionally, the driving module includes a first switching transistor, the switch includes a second switching transistor, the control terminal of the first switching transistor is used to receive the first signal, the first terminal of the first switching transistor is electrically connected to the control terminal of the second switching transistor, the second terminal of the first switching transistor is grounded, and the first terminal and the second terminal of the second switching transistor are respectively connected to the input terminal and the output terminal.

[0015] Optionally, the first switching transistor is an NPN transistor, the second switching transistor is a PNP transistor, the base of the first switching transistor is used to receive the first signal, the collector of the first switching transistor is electrically connected to the base of the second switching transistor, the emitter of the first switching transistor is grounded, and the emitter and collector of the second switching transistor are respectively connected to the input terminal and the output terminal.

[0016] Optionally, the main circuit module further includes a first resistor and a second resistor, wherein the first resistor is connected between the control terminal and the first terminal of the second switching transistor, and the second resistor is connected between the first terminal of the first switching transistor and the control terminal of the second switching transistor.

[0017] Optionally, the main circuit module further includes a first capacitor and a second capacitor, one end of the first capacitor being electrically connected to the input terminal, one end of the second capacitor being electrically connected to the output terminal, and the other ends of the first capacitor and the second capacitor being grounded.

[0018] On the other hand, this application also provides an electronic device, which includes a load and the above-described signal conversion circuit, wherein the output terminal of the signal conversion circuit is electrically connected to the load.

[0019] Compared with the prior art, this application has the following advantages:

[0020] This application provides a signal conversion circuit and an electronic device. The signal conversion circuit includes a driver module and a main circuit module. The main circuit module includes a switch, and the driver module is electrically connected to the switch. The driver module is also used to receive a first signal. The main circuit module also includes an input terminal and an output terminal. The switch is connected to the input terminal and the output terminal respectively. The input terminal is used to receive a second signal, and the output terminal is used to connect to a load. The first signal and the second signal have different voltage values. The driver module is used to drive the switch to open or close according to the first signal. When the switch is on, the main circuit module is used to transmit the second signal to the load. By setting up a driver module and a main circuit module, this application can achieve isolation between the first signal and the second signal. At the same time, by driving the first signal, the transmission of the second signal in the main circuit module can be achieved, thereby realizing signal conversion. Furthermore, the conversion circuit has stronger compatibility.

[0021] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of a signal conversion circuit provided in an embodiment of this application.

[0024] Figure 2 This is a schematic diagram of the signal conversion circuit provided in an embodiment of this application.

[0025] Figure 3 This is a circuit diagram of the signal conversion circuit provided in an embodiment of this application.

[0026] In the picture:

[0027] 110 - Main circuit module; 111 - Switch; 120 - Drive module; Q1 - First switching transistor; Q2 - Second switching transistor; R1 - First resistor; R2 - Second resistor; R3 - Third resistor; R4 - Current limiting resistor; R5 - Impedance fixed resistor; C1 - First capacitor; C2 - Second capacitor; D1 - Diode; D2 - Clamping element. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0030] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, in the description of this application, terms such as "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] It should be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0032] In the description of this application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0033] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0034] As described in the background section, different systems currently require different time synchronization signals. For example, system A requires a time synchronization signal with an amplitude of 3.3V, while system B requires a time synchronization signal with an amplitude of 5V, thus requiring signal conversion.

[0035] Currently, signal conversion methods generally use integrated voltage comparators to achieve level conversion and signal isolation. However, in practical applications, integrated voltage comparators from different manufacturers have incompatible packages, resulting in poor compatibility and potential difficulties in procuring materials. At the same time, the cost of integrated voltage comparators is relatively high.

[0036] In view of this, in order to solve the above problems, this application provides a signal conversion circuit that realizes signal conversion through circuitry. The circuit structure is relatively simple and the cost is lower, and it does not need to consider the compatibility of components.

[0037] The signal conversion circuit provided in this application is described below as an example:

[0038] As an optional implementation, please refer to Figure 1 The signal conversion circuit includes a drive module 120 and a main circuit module 110. The main circuit module 110 includes a switch 111, and the drive module 120 is electrically connected to the switch 111. The drive module 120 is also used to receive a first signal. The main circuit module 110 also includes an input terminal and an output terminal. The switch 111 is connected to the input terminal and the output terminal respectively. The input terminal is used to receive a second signal, and the output terminal is used to connect to a load. The voltage values ​​of the first signal and the second signal are different. The drive module 120 is used to drive the on / off state of the switch 111 according to the first signal. When the switch 111 is on, the main circuit module 110 is used to transmit the second signal to the load.

[0039] It should be noted that by driving the switch 111 to its on / off state through the drive module 120, the output signal can be converted. That is, when a first signal is input, the signal output to the load is a second signal, and the voltage values ​​of the first and second signals are different, thus achieving signal conversion. For example, if the voltage value of the first signal is 3.3V and the voltage value of the second signal is 5V, then a signal with an amplitude of 3.3V is converted to a 5V signal. Furthermore, this conversion circuit is flexible in application; the two signals can be used without limitation. For example, the voltage value of the first signal can be set to 3.3V and the voltage value of the second signal can be set to 10V, thus converting a signal with an amplitude of 3.3V to a 10V signal, and so on.

[0040] On the other hand, by driving the switch 111 to its on / off state through the drive module 120, signal isolation can also be achieved, ensuring that the output signal does not affect the first signal. For example, if the load voltage connected to the output suddenly increases, the current cannot flow from the switch 111 to the drive module 120, thus not affecting the first signal.

[0041] It should also be noted that the input and output terminals described in this application can be physical ports or virtual ports. That is, if there are physical output and input ports on the main circuit module 110, the output port is used as the input terminal and the output port is used as the output terminal, and the input and output terminals are electrically connected to the switch 111 respectively. When the main circuit module 110 does not have input and output ports, the input and output terminals are virtualized in the main circuit module 110. The input terminal is used to receive the second signal and the output terminal is used to connect the load. Similarly, the switch 111 is electrically connected to both of them respectively.

[0042] Please see Figure 2 The following example, using a first signal of 3.3V and a second signal of 5V, illustrates the working principle of the signal conversion circuit provided in this application:

[0043] The first signal can be a pulse signal with an amplitude of 3.3V. When the signal is a pulse signal, its amplitude is used as the voltage value. Figure 2 In this example, the duty cycle of the first signal is 50%. Of course, in other examples, the first signal can also use other duty cycles, such as 25%, etc., which are not limited here. The second signal is an analog signal with a voltage value of 5V.

[0044] When the drive module 120 drives the switch 111 using the first signal, if it is in time period t1, the first signal is at a high level of 3.3V, the drive switch 111 is turned on, and the second signal is transmitted to the output terminal and then to the load through the switch 111. Since the second signal is a 5V analog signal, the output terminal outputs a 5V high-level signal to the load during time period t1. If it is in time period t2, the first signal is at a low level of 0V, the drive switch 111 is turned off, the second signal cannot be transmitted to the output terminal through the switch 111, and the output terminal outputs a 0V low-level signal to the load. If it is in time period t3, the output terminal continues to output a 5V high-level signal to the load... and so on, so that the output terminal also outputs a pulse signal.

[0045] Understandably, the duty cycle of the output signal is the same as that of the first signal, and its amplitude is the same as the voltage value of the second signal, but different from the amplitude of the first signal. The amplitude of the output signal can be greater than or less than that of the first signal; this is not limited here. Through a signal conversion circuit, the input first signal and the output signal can be converted, and a signal with the required amplitude, such as a 5V signal or a 10V signal, can be output from the output terminal.

[0046] In one implementation, the drive module 120 includes a first switch Q1, and the switch 111 includes a second switch Q2. The control terminal of the first switch Q1 is used to receive a first signal. The first terminal of the first switch Q1 is electrically connected to the control terminal of the second switch Q2, and the second terminal of the first switch Q1 is grounded. The first and second terminals of the second switch Q2 are respectively connected to the input terminal and the output terminal. Of course, the drive module 120 and the switch 111 can also use other devices. For example, the drive module 120 can be a driver chip, and the switch 111 can be a relay. No limitation is made here.

[0047] When the drive module 120 and the switch 111 use the switch 111 transistor, transistors such as triodes, MOSFETs, and IGBTs can be selected. Since the price of triodes is relatively low, both the drive module 120 and the switch 111 in this application can use triodes.

[0048] In one implementation, the first switch Q1 is an NPN transistor, and the second switch Q2 is a PNP transistor. The base of the first switch Q1 is used to receive the first signal, the collector of the first switch Q1 is electrically connected to the base of the second switch Q2, the emitter of the first switch Q1 is grounded, and the emitter and collector of the second switch Q2 are respectively connected to the input terminal and the output terminal.

[0049] Of course, in order to better drive the transistor to turn on and off, the main circuit module 110 also includes a first resistor R1 and a second resistor R2. The first resistor R1 is connected between the control terminal and the first terminal of the second switching transistor Q2, and the second resistor R2 is connected between the first terminal of the first switching transistor Q1 and the control terminal of the second switching transistor Q2.

[0050] In this circuit, the first resistor R1 provides bias, and together with the second resistor R2, they form a voltage divider to provide the base voltage required for the second switch Q2. Furthermore, to protect the first switch Q1, a third resistor R3 is connected to its base, which limits current.

[0051] It should be noted that the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3 can be set according to requirements. For example, the resistance values ​​of the first resistor R1, the second resistor R2, and the third resistor R3 can all be 10K, which is sufficient to meet the resistance requirements for conduction.

[0052] The working principles of the first switch Q1 and the second switch Q2 are explained below:

[0053] The condition for an NPN transistor to be in saturation conduction is that Ub > Ue and Ub > Uc, meaning the base voltage is greater than the collector voltage and the base voltage is greater than the emitter voltage. The condition for an NPN transistor to be in cutoff is that Ub < Ue and Ub < Uc, or Ube < 0 and Ubc < 0.

[0054] Therefore, if the first signal is a pulse signal with an amplitude of 3.3V, the first switch Q1 will be turned on when the output is high, and turned off when the output is low.

[0055] The conditions for a PNP transistor to be in saturation conduction state are Ub < Ue and Ub < Uc, that is, the base voltage is less than the collector voltage and the base voltage is less than the emitter voltage. The conditions for a PNP transistor to be in cutoff state are Ub > Ue and Ub > Uc.

[0056] If the second signal is a 5V analog signal, then when the first switch Q1 is on, the emitter voltage of the second switch Q2 is 5V, and the collector voltage is the emitter voltage minus the internal PN junction voltage drop, approximately 4.3V. Since the first resistor R1 and the second resistor R2 have equal resistances, after voltage division by R1 and R2, the base voltage of the second switch Q2 is approximately 2.5V, satisfying the saturation conduction condition of a PNP transistor, and the second switch is on. When the first switch Q1 is off, the base voltage of the second switch Q2 is 5V. Therefore, no current flows between the base and emitter, and no current flows through the collector, indicating it is in the off state.

[0057] In one implementation, to protect the second signal from damage, i.e. to prevent damage to the system power supply and affect the operation of other parts of the system, the main circuit module 110 also includes a diode D1, the anode of which is electrically connected to the input terminal and the cathode of which is electrically connected to the switch 111.

[0058] For example, when the second signal is a 5V analog signal, the load connected to the output terminal may experience high voltage, such as a short circuit fault at the load terminal, which may cause a 20V high voltage at the load terminal. In this case, the second switching transistor Q2 may break down and output voltage in reverse to the input terminal. Since the input terminal is actually connected to the system power supply, the system power supply may be damaged.

[0059] By setting up diode D1 and utilizing its unidirectional conduction characteristic, it is possible to ensure that high voltage cannot be output to the system power supply in reverse, thereby protecting the system power supply.

[0060] Furthermore, to improve the signal output to the load, the main circuit module 110 also includes a first capacitor C1 and a second capacitor C2. One end of the first capacitor C1 is electrically connected to the input terminal, and one end of the second capacitor C2 is electrically connected to the output terminal. The other ends of the first capacitor C1 and the second capacitor C2 are grounded. By setting the first capacitor C1 and the second capacitor C2, filtering can be achieved simultaneously at both the signal input and signal output terminals, thereby improving the output signal quality. The capacitance values ​​of the first capacitor C1 and the second capacitor C2 can be the same or different; for example, the capacitance value of the first capacitor C1 can be 10uF, and the capacitance value of the second capacitor C2 can be 100pF.

[0061] In an alternative implementation, to protect the second transistor when high voltage is present at the load end, such as a high-voltage pulse signal, the main circuit module 110 may further include a clamping element D2. One end of the clamping element D2 is electrically connected to the output terminal, and the other end is grounded. The clamping element D2 can clamp the voltage to a smaller value.

[0062] For example, when a 50V high-voltage pulse signal appears at the load end, due to the clamping element D2, the voltage at the output end can be clamped to a smaller voltage, such as 10V or 20V, through the clamping action of the clamping module, so as to avoid the high voltage from breaking down the second switching transistor Q2.

[0063] This application does not limit the type of clamping element D2. For example, clamping element D2 can be a Zener diode or a TVS diode.

[0064] While clamping element D2 provides some protection for the second switching transistor Q2, it only clamps at a trigger threshold. For example, if the clamping threshold of D2 is 20V, it will only clamp the output voltage to 20V when a high-voltage pulse signal greater than 20V appears at the load. If the voltage is below 20V, clamping will not occur. For instance, if a 19V pulse signal appears at the load, clamping will not be performed, but 19V is still a high voltage for the second switching transistor Q2, posing a potential risk of breakdown.

[0065] Therefore, to protect the second switching transistor Q2, the main circuit module 110 also includes a current-limiting resistor R4. One end of the current-limiting resistor R4 is electrically connected to the switch 111, and the other end is electrically connected to the output terminal. Through the current-limiting effect of the current-limiting resistor R4, the current flowing to the second switching transistor Q2 is kept small, thereby achieving the purpose of protecting the second switching transistor Q2.

[0066] In one implementation, the main circuit module 110 further includes a fixed impedance resistor R5, one end of which is electrically connected to the output terminal, and the other end is grounded. The fixed impedance resistor R5 can stabilize and fix the impedance.

[0067] Without the fixed impedance resistor R5, a fault in the load circuit would disconnect the output circuit, potentially causing waveform distortion. However, with the fixed impedance resistor R5, even in the event of a load circuit fault, the collector of the second switching transistor Q2 can be grounded through R5, reducing the likelihood of waveform distortion and achieving stable impedance.

[0068] It should be noted that when adopting such Figure 3 In the circuit connection shown, the fixed impedance resistor R5 and the current limiting resistor R4 form a voltage divider component. In order to avoid the output amplitude being too low, the resistance of the fixed impedance resistor R5 is greater than the resistance of the current limiting resistor R4. For example, the resistance of the fixed impedance resistor R5 is set to 47K and the resistance of the current limiting resistor R4 is set to 1K.

[0069] Furthermore, it should be noted that the implementation of the main circuit module 110 transmitting the second signal to the load in this application is an ideal scenario, assuming that the voltage drop of diode D1, the second switch Q2, and the current-limiting resistor R4 is negligible. However, in practical applications, the voltage drop of diode D1, the second switch Q2, and the current-limiting resistor R4 needs to be considered to ensure that the signal output from the output terminal is the required signal.

[0070] For example, combining Figure 3 When the output terminal needs to output 5V, the voltage drop of diode D1 is 0.7V, the voltage drop of the second switch Q2 is 0.3V, and the voltage drop of the current limiting resistor R4 is 0.5V. Therefore, the voltage value of the second signal needs to be controlled to be 5V + 0.7V + 0.3V + 0.5V = 6.5V.

[0071] Based on the above implementation, this application also provides an electronic device, which includes a load and the above-mentioned signal conversion circuit. The output terminal of the signal conversion circuit is electrically connected to the load, and the signal conversion circuit provides the required signal to the load.

[0072] In summary, this application provides a signal conversion circuit and an electronic device. The signal conversion circuit includes a driver module and a main circuit module. The main circuit module includes a switch, and the driver module is electrically connected to the switch. The driver module is also used to receive a first signal. The main circuit module also includes an input terminal and an output terminal. The switch is connected to the input terminal and the output terminal respectively. The input terminal is used to receive a second signal, and the output terminal is used to connect to a load. The first signal and the second signal have different voltage values. The driver module is used to drive the switch to open or close based on the first signal. When the switch is closed, the main circuit module transmits the second signal to the load. By setting up a driver module and a main circuit module, this application can achieve isolation between the first signal and the second signal. Simultaneously, by driving the first signal, the second signal can be transmitted in the main circuit module, thereby achieving signal conversion. Furthermore, the conversion circuit has stronger compatibility.

[0073] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

[0074] It will be apparent to those skilled in the art that this application is not limited to the details of the exemplary embodiments described above, and that this application can be implemented in other specific forms without departing from the spirit or essential characteristics of this application. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this application is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this application. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A signal conversion circuit, characterized in that, The signal conversion circuit includes a driver module and a main circuit module. The main circuit module includes a switch, and the driver module is electrically connected to the switch. The driver module is also used to receive a first signal. The main circuit module includes an input terminal and an output terminal. The switch is connected to the input terminal and the output terminal respectively. The input terminal is used to receive a second signal, and the output terminal is used to connect to a load. The voltage values ​​of the first signal and the second signal are different. The driving module is used to drive the on / off state of the switch according to the first signal; When the switch is turned on, the main circuit module is used to transmit the second signal to the load; the first signal is a pulse signal, the duty cycle of the output signal is the same as that of the first signal, and its amplitude is the same as the voltage value of the second signal; The driving module includes a first switching transistor, and the switch includes a second switching transistor. The control terminal of the first switching transistor is used to receive the first signal. The first terminal of the first switching transistor is electrically connected to the control terminal of the second switching transistor. The second terminal of the first switching transistor is grounded. The first terminal and the second terminal of the second switching transistor are respectively connected to the input terminal and the output terminal. The first switching transistor is an NPN transistor, and the second switching transistor is a PNP transistor. The base of the first switching transistor is used to receive the first signal. The collector of the first switching transistor is electrically connected to the base of the second switching transistor. The emitter of the first switching transistor is grounded. The emitter and collector of the second switching transistor are respectively connected to the input terminal and the output terminal.

2. The signal conversion circuit as described in claim 1, characterized in that, The main circuit module also includes a clamping element, one end of which is electrically connected to the output terminal and the other end is grounded.

3. The signal conversion circuit as described in claim 1, characterized in that, The main circuit module also includes a current-limiting resistor, one end of which is electrically connected to the switch and the other end of which is electrically connected to the output terminal.

4. The signal conversion circuit as described in claim 1, characterized in that, The main circuit module also includes a fixed impedance resistor, one end of which is electrically connected to the output terminal and the other end is grounded.

5. The signal conversion circuit as described in claim 1, characterized in that, The main circuit module also includes a diode, the anode of which is electrically connected to the input terminal and the cathode of which is electrically connected to the switch.

6. The signal conversion circuit as described in claim 1, characterized in that, The main circuit module further includes a first resistor and a second resistor. The first resistor is connected between the control terminal and the first terminal of the second switching transistor, and the second resistor is connected between the first terminal of the first switching transistor and the control terminal of the second switching transistor.

7. The signal conversion circuit as described in claim 1, characterized in that, The main circuit module also includes a first capacitor and a second capacitor. One end of the first capacitor is electrically connected to the input terminal, one end of the second capacitor is electrically connected to the output terminal, and the other ends of the first capacitor and the second capacitor are grounded.

8. An electronic device, characterized in that, The electronic device includes a load and a signal conversion circuit as described in any one of claims 1 to 7, wherein the output of the signal conversion circuit is electrically connected to the load.

Images