Control signal conditioning circuit and controller

Abstract

The utility model provides a control signal adjusting circuit and a controller, and the control signal adjusting circuit can collect the size of a target current provided for an external load by a signal conversion unit through the switching of a single-pole double-throw switch at the output end of the signal conversion unit, and then transmits a collection result to a signal adjusting unit. After receiving the acquisition result, the signal adjusting unit can accurately adjust the control signal according to the difference between the acquisition result and the standard value, so that the signal conversion unit accurately adjusts the target current required by the external load under the action of the adjusted control signal, thereby accurately controlling the output of the driving current, and improving the driving efficiency. And the current output precision is improved.

Description

Technical Field

[0001] This application belongs to the field of circuit signal conditioning, and particularly relates to a control signal conditioning circuit and controller. Background Technology

[0002] With the increasing commercialization of high-precision electronic products, more and more current-driven electronic products are emerging, leading to increasingly higher requirements for current driving capability and accuracy. Currently, in the current control of high-precision products, related technologies cannot accurately control the current output, resulting in low current output accuracy and poor driving precision. Utility Model Content

[0003] This application provides a control signal conditioning circuit and controller that can accurately control the magnitude of the drive current of electronic products.

[0004] In a first aspect, embodiments of this application provide a control signal conditioning circuit, including:

[0005] A signal conversion unit is used to receive control signals and provide a target current to an external load based on the control signals;

[0006] A signal conditioning unit is used to adjust the control signal and send the adjusted control signal to the signal conversion unit;

[0007] The first terminal of the signal conversion unit is connected to the output terminal of the signal conditioning unit, the second terminal of the signal conversion unit is connected to the power supply voltage, and the third terminal of the signal conversion unit is connected to the first terminal of the single-pole double-throw switch; the second terminal of the single-pole double-throw switch is connected to the external load, and the third terminal of the single-pole double-throw switch is connected to the input terminal of the signal conditioning unit.

[0008] Secondly, embodiments of this application provide a controller, including the control signal conditioning circuit as described in the first aspect.

[0009] The control signal conditioning circuit and controller of this application embodiment can acquire the magnitude of the target current provided by the signal conversion unit to the external load by switching the single-pole double-throw switch at the output end of the signal conversion unit, and then send the acquisition result to the signal conditioning unit. After receiving the acquisition result, the signal conditioning unit can accurately adjust the control signal according to the difference between the acquisition result and the standard value, so that the signal conversion unit can accurately adjust the target current required by the external load under the action of the adjusted control signal, thereby accurately controlling the output of the drive current and improving the current output accuracy. Attached Figure Description

[0010] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0011] Figure 1 This is a schematic diagram of a control signal conditioning circuit provided in an embodiment of this application;

[0012] Figure 2 This is a schematic diagram of the structure of a signal conditioning unit provided in an embodiment of this application;

[0013] Figure 3 This is a schematic diagram of another signal conditioning unit provided in an embodiment of this application;

[0014] Figure 4 This is a schematic diagram of another control signal conditioning circuit provided in an embodiment of this application;

[0015] Figure 5 This is a schematic diagram of another control signal conditioning circuit provided in the embodiments of this application. Detailed Implementation

[0016] The features and exemplary embodiments of various aspects of this application will be described in detail below. To make the objectives, technical solutions, and advantages of this application clearer, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only intended to explain this application and not to limit it. For those skilled in the art, this application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of this application by illustrating examples.

[0017] It should be noted that, in this document, relational terms such as "first" and "second" are used merely 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," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element.

[0018] As described in the background section, with the continuous commercialization of high-precision electronic products, more and more current-driven electronic products are emerging, leading to increasing demands on current driving capability and accuracy. Currently, in the current control of high-precision products, after issuing the control signal for the driving current, the control signal is not adjusted, and the magnitude of the output current cannot be obtained in a timely manner. Therefore, current technologies cannot accurately control the output of the driving current, resulting in low current output accuracy and poor driving precision.

[0019] To address the problems in the prior art, this application provides a control signal conditioning circuit. By switching the single-pole double-throw switch at the output of the signal conversion unit, the magnitude of the target current provided by the signal conversion unit to the external load can be acquired. The acquired result is then sent to the signal conditioning unit. After receiving the acquired result, the signal conditioning unit can accurately adjust the control signal based on the difference between the acquired result and the standard value. Under the action of the adjusted control signal, the signal conversion unit can accurately adjust the target current required by the external load, thereby accurately controlling the output of the drive current and improving the current output accuracy.

[0020] The control signal conditioning circuit provided in the embodiments of this application will be described below.

[0021] Figure 1 A schematic diagram of a first control signal conditioning circuit according to an embodiment of this application is shown. The control signal conditioning circuit includes:

[0022] Signal conversion unit 02 is used to receive control signals and provide target current to external loads based on the control signals;

[0023] The signal conditioning unit 01 is used to adjust the control signal and send the adjusted control signal to the signal conversion unit 02.

[0024] The first terminal of the signal conversion unit 02 is connected to the output terminal of the signal conditioning unit 01, the second terminal of the signal conversion unit 02 is connected to the power supply voltage V+, and the third terminal of the signal conversion unit 02 is connected to the first terminal of the single-pole double-throw switch 03; the second terminal of the single-pole double-throw switch 03 is connected to the external load 09, and the third terminal of the single-pole double-throw switch 03 is connected to the input terminal of the signal conditioning unit.

[0025] It should be noted that the first terminal of the signal conversion unit receives the regulated control signal from the signal conditioning unit. Based on this control signal, the power supply voltage received at the second terminal of the signal conversion unit is converted into a rated voltage and output as a target current through the third terminal of the signal conversion unit. The target current output from the third terminal of the signal conversion unit is connected to the first terminal of a single-pole double-throw switch. When the single-pole double-throw switch is switched to the second terminal, the target current supplies power to the external load. When the single-pole double-throw switch is switched to the third terminal, the signal conditioning unit acquires this target current and converts it into sampled voltage information, which serves as the basis for adjusting the control signal.

[0026] In some embodiments, at the start of operation of the control signal conditioning circuit, the single-pole double-throw switch can be switched to its third terminal, allowing the signal conditioning unit to accurately adjust the control signal. Once the target current output by the signal conversion unit stabilizes, the single-pole double-throw switch can be switched to its second terminal to provide a precise drive current to the external load. In some embodiments, the external load can be any current-driven electronic device equipped with a controller, without limitation.

[0027] In some embodiments, reference Figure 2 The signal conditioning unit includes: a voltage comparison module and a signal conditioning chip;

[0028] Voltage Comparison Module U 01 It is used to receive the sampled voltage information acquired from the signal conversion unit and the standard voltage information output by the signal conditioning chip, and output the comparison result of the sampled voltage information and the standard voltage information through the second terminal of the voltage comparison module;

[0029] The signal conditioning chip ZYNQ is used to receive the comparison result, adjust the control signal based on the comparison result, output the adjusted control signal through the third terminal of the signal conditioning chip, and output a high-level signal through the fourth terminal of the signal conditioning chip after the control signal is adjusted.

[0030] Among them, the voltage comparison module U 01 The first terminal is the input terminal, and the voltage comparison module U 01 The second terminal is connected to the first terminal of the signal conditioning chip ZYNQ, and the voltage comparison module U 01 The third terminal is connected to the second terminal of the signal conditioning chip ZYNQ; the third terminal of the signal conditioning chip ZYNQ is connected to the collector of the transistor V1; the fourth terminal of the signal conditioning chip is connected to the base of the transistor V1; and the emitter of the transistor V1 is connected to the output terminal.

[0031] It should be noted that the voltage comparison module further includes a fourth terminal and a fifth terminal, through which the operating voltage is provided to the voltage comparison module. In order for the signal conversion unit to directly receive the regulated control signal from the signal conditioning unit, in this embodiment, reference is made to... Figure 2 The control signal output from the third terminal GPIO2 of the signal conditioning chip ZYNQ is a voltage signal, i.e., an analog signal. Simultaneously, after the control signal completes its adjustment, the fourth terminal of the signal conditioning chip sends a high-level signal to the base of transistor V1, causing the collector and emitter of transistor V1 to conduct, thereby outputting the aforementioned voltage signal.

[0032] In some embodiments, reference Figure 2 To filter the voltage signal output from the third terminal GPIO2 of the signal conditioning chip ZYNQ, a filter, a capacitor, and a first regulating resistor are provided between the third terminal of the signal conditioning chip ZYNQ and the transistor V1. The third terminal GPIO2 of the signal conditioning chip ZYNQ is connected to the first terminal of the filter L1, the common node of the second terminal of the filter L1 and the first terminal of the capacitor is connected to the first terminal of the first regulating resistor R1, and the second terminal of the first regulating resistor R1 is connected to the collector of the transistor V1.

[0033] In some embodiments, reference Figure 2 To prevent the emitted control signal from flowing back, a diode D1 and a second regulating resistor R2 are placed after the emitter of transistor V1. The emitter of transistor V1 is connected to the common node of the first terminal of the diode and the first terminal of the second regulating resistor. The common node of the second terminal of the diode and the second terminal of the second regulating resistor serves as the output terminal of the signal conditioning unit. (Reference) Figure 2 In one example, the output of the signal conditioning unit is connected to an optocoupler HT281. This optocoupler is used to isolate the signal conditioning unit from the signal conversion unit.

[0034] In some embodiments, reference Figure 3 The signal conditioning unit includes: a voltage comparison module and a signal conditioning chip;

[0035] Voltage Comparison Module U 01 It is used to receive the sampled voltage information acquired from the signal conversion unit and the standard voltage information output by the signal conditioning chip, and to transmit the comparison result of the sampled voltage information and the standard voltage information through the voltage comparison module U. 01 The second output;

[0036] The signal conditioning chip ZYNQ is used to receive the comparison result, adjust the control signal based on the comparison result, and output the adjusted control signal through the third terminal of the signal conditioning chip. The adjusted control signal output from the third terminal of the signal conditioning chip is a digital signal.

[0037] Wherein, the first terminal of the voltage comparison module is the input terminal, the second terminal of the voltage comparison module is connected to the first terminal of the signal conditioning chip, the third terminal of the voltage comparison module is connected to the second terminal of the signal conditioning chip, and the third terminal of the signal conditioning chip is the output terminal of the signal conditioning unit.

[0038] It should be noted that, in this embodiment, the regulated control signal output from the third terminal of the signal conditioning chip is a digital signal. Therefore, referring to... Figure 3 and Figure 4 The regulated control signal output from the third terminal of the signal conditioning chip needs to be converted into a voltage signal (analog signal) by the digital-to-analog converter 07 before being sent to the signal conversion unit 02.

[0039] It should be noted that the reference Figure 2 and Figure 5 In some embodiments, the voltage comparison module U 01 The received voltage feedback information can be acquired through a single-pole double-throw switch connected to the signal conversion unit, or it can be the voltage across the third resistor in the signal conversion unit. Correspondingly, the ZYNQ signal conditioning chip can output two standard voltage information. The first standard voltage information is compared with the voltage feedback information acquired through the single-pole double-throw switch, and the second standard voltage information is compared with the voltage feedback information obtained through the voltage across the third resistor. When comparing the received voltage information with the standard voltage information, a certain error range can be set. For example, if a standard voltage is 10V, a deviation of ±0.2V can be set. When the difference between the received voltage information and the standard voltage information is within the preset deviation range, no adjustment of the control signal is required.

[0040] In some embodiments, reference Figure 4 The third terminal of the single-pole double-throw switch 03 is connected to the input terminal of the signal conditioning unit 01 via an analog-to-digital converter 04 and a first optocoupler 05. The first terminal of the signal conversion unit 02 is connected to the output terminal of the signal conditioning unit 01 via a digital-to-analog converter 07 and a second optocoupler 06. It should be noted that the first and second optocouplers are used to isolate the signal conditioning unit from the signal conversion unit to prevent interference between them. Figure 4 In the corresponding embodiment, both the input and output of the signal conditioning unit are digital signals.

[0041] In some embodiments, reference Figure 1 The third terminal of the single-pole double-throw switch 03 is connected to the input terminal of the signal conditioning unit 01 via an analog-to-digital converter 04 and a first optocoupler 05; the first terminal of the signal conditioning unit 02 is connected to the output terminal of the signal conditioning unit 01 via a second optocoupler 06. It should be noted that in... Figure 1 In a corresponding embodiment, the output of the signal conditioning unit is a voltage signal, and the input of the signal conditioning unit is a digital signal.

[0042] It should be noted that, in order to accurately acquire the voltage signal corresponding to the target current output by the signal conversion unit, in some embodiments, reference is made to... Figure 1 and Figure 4 A fifth resistor R is also provided between the third terminal of the single-pole double-throw switch 03 and the analog-to-digital converter 04. S5 Among them, the fifth resistor R S5 The first end is connected to the third end of the single-pole double-throw switch 03, and the fifth resistor R S5 The second terminal is connected to the second terminal of the analog-to-digital converter 04. The first terminal of the analog-to-digital converter 04 is connected to the input terminal of the signal conditioning unit 01 through the first optocoupler. The third terminal of the analog-to-digital converter 04 is grounded.

[0043] In some embodiments, reference Figure 4 The signal conversion unit includes:

[0044] First-level proportional operation sub-circuit 021 and second-level proportional operation sub-circuit 022;

[0045] The first terminal of the first-level proportional operation sub-circuit 021 is the first terminal of the signal conversion unit 02; the common node of the second terminal of the first-level proportional operation sub-circuit 021 and the second terminal of the second-level proportional operation sub-circuit 022 is the second terminal of the signal conversion unit 02; the third terminal of the first-level proportional operation sub-circuit 021 is connected to the first terminal of the second-level proportional operation sub-circuit 022; the fourth terminal of the first-level proportional operation sub-circuit 021 is grounded; the third terminal of the second-level proportional operation sub-circuit 022 is the third terminal of the signal conversion unit 02.

[0046] It should be noted that after the signal conversion unit receives the voltage signal, the voltage signal is converted by the first-level proportional operation sub-circuit, and then the power supply voltage is converted to the rated voltage by the second-level proportional operation sub-circuit. The rated voltage can be set as needed. Then, it is converted into the target current to be output in the subsequent stage. The target current can be provided to the external load after flowing through the single-pole double-throw switch.

[0047] In some embodiments, reference Figure 4 The first-level proportional operation sub-circuit 021 includes:

[0048] First amplifier U1, first metal-oxide-semiconductor field-effect transistor Q1, first resistor R S1 Second resistor R S2 ;

[0049] Wherein, the first terminal of the first amplifier U1 is the first terminal of the first-stage proportional operational circuit 021, the second terminal of the first amplifier U1 is connected to the gate of the first metal-oxide-semiconductor field-effect transistor Q1, and the source of the first metal-oxide-semiconductor field-effect transistor Q1 is connected to the first resistor R. S1 The common node of the first end is connected to the third end of the first amplifier U1; the first resistor R S1 The second terminal is the fourth terminal of the first-stage proportional operational circuit 021; the drain of the first metal-oxide-semiconductor field-effect transistor Q1 is connected to the second resistor R. S2 The common node of the second end is the third end of the first-level proportional operation sub-circuit 021; the second resistor R S2 The first terminal is the second terminal of the first-level proportional operation sub-circuit 021.

[0050] In some embodiments, reference Figure 4 The secondary proportional operation sub-circuit 022 includes:

[0051] The second amplifier U2, the second metal-oxide-semiconductor field-effect transistor Q2, and the third resistor R S3 ;

[0052] Wherein, the common node between the first terminal of the second amplifier U2 and the source of the second metal-oxide-semiconductor Q2 is connected to the third resistor R. S3 The second terminal is connected; the second terminal of the second amplifier U2 is the first terminal of the second-stage proportional operational circuit 022; the third terminal of the second amplifier U2 is connected to the gate of the second metal-oxide-semiconductor field-effect transistor Q2; the third resistor R S3 The first terminal is the second terminal of the second-level proportional operation sub-circuit 022; the drain of the second metal oxide field-effect transistor Q2 is the third terminal of the second-level proportional operation sub-circuit 022.

[0053] It should be noted that the reference Figure 4 In the signal conversion unit, the signal passes through the first resistor R S1 Current I S1 =U 输入 / R S1 U 输入 This represents the voltage signal received at the first terminal of the first amplifier U1. This signal passes through the second resistor R. S2 Current IS2 =I S1 The second resistor R S2 Voltage U across the terminals RS2 =I S2* R S2 Third resistor R S3 Voltage U across the terminals RS3 =U RS2 After passing through the third resistor R S3 Current I S3 =U RS3 / R S3 After conversion, I is obtained. S3 =(U 输入 *R S2 ) / (R S1* R S3 ). Among them, I S3 This is the target current output by the signal conversion unit. Therefore, when the voltage signal received at the first terminal of the first amplifier U1 increases, the target current output by the signal conversion unit will also increase.

[0054] In some embodiments, reference Figure 5 The circuit further includes:

[0055] Voltage sampling unit 08 is used to sample the voltage of the third resistor R. S3 The voltage across the two ends;

[0056] Wherein, the second terminal of the signal conversion unit 02 and the common node of the power supply voltage are connected to the first terminal of the voltage recovery unit 08; the third terminal of the single-pole double-throw switch 03 and the common node of the input terminal are connected to the second terminal of the voltage recovery unit 08; the third resistor R S3 The common node of the second terminal, the first terminal of the second amplifier U2, and the source of the second metal oxide field-effect transistor Q2 is connected to the third terminal of the voltage recovery unit 08.

[0057] It should be noted that the voltage feedback unit is used to collect the voltage across the third resistor and feed this voltage back to the signal conditioning unit. This voltage feedback unit allows for real-time acquisition of the voltage across the third resistor when the single-pole double-throw switch is connected to an external load, and the accuracy of the target current output by the signal conversion unit can be determined based on the voltage across the third resistor.

[0058] It should be noted that the signal conditioning chip in the signal conditioning unit can output two standard voltage information simultaneously: one is used to compare the voltage information corresponding to the target current output by the signal conversion unit, and the other is used to compare the voltage information across the third resistor acquired.

[0059] In some embodiments, reference Figure 5The voltage recovery unit 08 includes:

[0060] Third amplifier U3, first amplification resistor R k1 Second amplifying resistor R k2 Third amplifying resistor R k3 and the fourth amplifying resistor R k4 ;

[0061] Wherein, the first amplifying resistor R k1 The first terminal is the first terminal of the voltage recovery unit 08; the first amplification resistor R k1 The second terminal is connected to the third amplifying resistor R k3 The common node of the first end is connected to the first end of the third amplifier U3; the second amplification resistor R k2 The first terminal is the third terminal of the voltage recovery unit 08; the second amplification resistor R k2 The second terminal is connected to the fourth amplifying resistor R k4 The common node of the first end is connected to the third end of the third amplifier U3; the third amplification resistor R k3 The common node between the second terminal of the third amplifier U3 and the second terminal of the third amplifier U3 is the second terminal of the voltage retrieval unit 08; the fourth amplification resistor R k4 The second terminal is grounded.

[0062] It should be noted that the voltage signal across the third resistor can be amplified using the voltage retrieval unit. The specific amplification factor can be achieved by setting the values ​​of the first, second, third, and fourth amplification resistors. For example, to amplify the voltage signal by 100 times, the first and second amplification resistors can be made equal, the third and fourth amplification resistors can be made equal, and the third amplification resistor can be 100 times the value of the first amplification resistor.

[0063] The control signal conditioning circuit of this application embodiment can acquire the magnitude of the target current provided by the signal conversion unit to the external load by switching the single-pole double-throw switch at the output terminal of the signal conversion unit, and then send the acquisition result to the signal conditioning unit. After receiving the acquisition result, the signal conditioning unit can accurately adjust the control signal according to the difference between the acquisition result and the standard value, so that the signal conversion unit can accurately adjust the target current required by the external load under the action of the adjusted control signal, thereby accurately controlling the output of the drive current and improving the current output accuracy.

[0064] In some embodiments, this application also proposes a controller that includes the control signal conditioning circuit as described in any of the foregoing embodiments. The controllers of the above embodiments are used to implement the functions of the corresponding control signal conditioning circuits in any of the foregoing embodiments, and have the beneficial effects of the corresponding control signal conditioning circuit embodiments, which will not be repeated here.

[0065] It should be clarified that this application is not limited to the specific configurations and processes described above and shown in the figures. For the sake of brevity, detailed descriptions of known methods are omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of this application is not limited to the specific steps described and shown. Those skilled in the art can make various changes, modifications, and additions, or change the order of steps, after understanding the spirit of this application.

[0066] The functional blocks shown in the above-described structural diagram can be implemented as hardware, software, firmware, or a combination thereof. When implemented in hardware, they can be, for example, electronic circuits, application-specific integrated circuits (ASICs), appropriate firmware, plug-ins, function cards, etc. When implemented in software, the elements of this application are programs or code segments used to perform the required tasks. Programs or code segments can be stored on a machine-readable medium or transmitted over a transmission medium or communication link via data signals carried on a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, fiber optic media, radio frequency (RF) links, etc. Code segments can be downloaded via computer networks such as the Internet, intranets, etc.

[0067] It should also be noted that the exemplary embodiments mentioned in this application describe methods or systems based on a series of steps or apparatus. However, this application is not limited to the order of the above steps; that is, the steps can be performed in the order mentioned in the embodiments, or in a different order, or several steps can be performed simultaneously.

[0068] It should be understood that each block in the flowchart and / or block diagram, and combinations of blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing apparatus to produce a machine such that these instructions, executed via the processor of the computer or other programmable data processing apparatus, enable the implementation of the function / action specified in one or more blocks of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field-programmable logic circuit. It is also understood that each block in the block diagram and / or flowchart, and combinations of blocks in the block diagram and / or flowchart, can also be implemented by special-purpose hardware that performs the specified function or action, or by a combination of special-purpose hardware and computer instructions.

[0069] The above description is merely a specific implementation of this application. Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, modules, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here. It should be understood that the protection scope of this application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and these modifications or substitutions should all be covered within the protection scope of this application.

Claims

1. A control signal conditioning circuit, characterized in that, include: A signal conversion unit is used to receive control signals and provide a target current to an external load based on the control signals; A signal conditioning unit is used to adjust the control signal and send the adjusted control signal to the signal conversion unit; The first terminal of the signal conversion unit is connected to the output terminal of the signal conditioning unit, the second terminal of the signal conversion unit is connected to the power supply voltage, and the third terminal of the signal conversion unit is connected to the first terminal of the single-pole double-throw switch; the second terminal of the single-pole double-throw switch is connected to the external load, and the third terminal of the single-pole double-throw switch is connected to the input terminal of the signal conditioning unit.

2. The circuit according to claim 1, characterized in that, The signal conditioning unit includes: a voltage comparison module and a signal conditioning chip; The voltage comparison module is used to receive the sampled voltage information acquired from the signal conversion unit and the standard voltage information output by the signal conditioning chip, and output the comparison result of the sampled voltage information and the standard voltage information through the second terminal of the voltage comparison module; The signal conditioning chip is used to receive the comparison result, adjust the control signal based on the comparison result, output the adjusted control signal through the third terminal of the signal conditioning chip, and output a high-level signal through the fourth terminal of the signal conditioning chip after the control signal is adjusted. Wherein, the first terminal of the voltage comparison module is the input terminal, the second terminal of the voltage comparison module is connected to the first terminal of the signal conditioning chip, the third terminal of the voltage comparison module is connected to the second terminal of the signal conditioning chip; the third terminal of the signal conditioning chip is connected to the collector of the transistor, the fourth terminal of the signal conditioning chip is connected to the base of the transistor; and the emitter of the transistor is connected to the output terminal.

3. The circuit according to claim 1, characterized in that, The signal conditioning unit includes: The voltage comparison module is used to receive the sampled voltage information acquired from the signal conversion unit and the standard voltage information output by the signal conditioning chip, and output the comparison result of the sampled voltage information and the standard voltage information through the second terminal of the voltage comparison module; The signal conditioning chip is used to receive the comparison result, adjust the control signal based on the comparison result, and output the adjusted control signal through the third terminal of the signal conditioning chip. The adjusted control signal output from the third terminal of the signal conditioning chip is a digital signal. Wherein, the first terminal of the voltage comparison module is the input terminal, the second terminal of the voltage comparison module is connected to the first terminal of the signal conditioning chip, the third terminal of the voltage comparison module is connected to the second terminal of the signal conditioning chip, and the third terminal of the signal conditioning chip is the output terminal of the signal conditioning unit.

4. The circuit according to claim 1, characterized in that, The signal conversion unit includes: First-level proportional operation sub-circuit and second-level proportional operation sub-circuit; The first terminal of the first-level proportional operation sub-circuit is the first terminal of the signal conversion unit; the common node of the second terminal of the first-level proportional operation sub-circuit and the second terminal of the second-level proportional operation sub-circuit is the second terminal of the signal conversion unit; the third terminal of the first-level proportional operation sub-circuit is connected to the first terminal of the second-level proportional operation sub-circuit; the fourth terminal of the first-level proportional operation sub-circuit is grounded; the third terminal of the second-level proportional operation sub-circuit is the third terminal of the signal conversion unit.

5. The circuit according to claim 4, characterized in that, The first-level proportional operation sub-circuit includes: A first amplifier, a first metal-oxide-semiconductor field-effect transistor, a first resistor, and a second resistor; Wherein, the first terminal of the first amplifier is the first terminal of the first-stage proportional operational circuit; the second terminal of the first amplifier is connected to the gate of the first metal-oxide-semiconductor field-effect transistor; the common node of the source of the first metal-oxide-semiconductor field-effect transistor and the first terminal of the first resistor is connected to the third terminal of the first amplifier; the second terminal of the first resistor is the fourth terminal of the first-stage proportional operational circuit; the common node of the drain of the first metal-oxide-semiconductor field-effect transistor and the second terminal of the second resistor is the third terminal of the first-stage proportional operational circuit; and the first terminal of the second resistor is the second terminal of the first-stage proportional operational circuit.

6. The circuit according to claim 4, characterized in that, The secondary proportional operation sub-circuit includes: Second amplifier, second metal-oxide-semiconductor field-effect transistor and third resistor; Wherein, the first terminal of the second amplifier and the common node of the source of the second metal-oxide-semiconductor field-effect transistor are connected to the second terminal of the third resistor; the second terminal of the second amplifier is the first terminal of the second-level proportional operation sub-circuit; the third terminal of the second amplifier is connected to the gate of the second metal-oxide-semiconductor field-effect transistor; the first terminal of the third resistor is the second terminal of the second-level proportional operation sub-circuit; the drain of the second metal-oxide-semiconductor field-effect transistor is the third terminal of the second-level proportional operation sub-circuit.

7. The circuit according to claim 6, characterized in that, The circuit also includes: A voltage acquisition unit is used to acquire the voltage across the third resistor; Specifically, the second terminal of the signal conversion unit and the common node of the power supply voltage are connected to the first terminal of the voltage recovery unit; the third terminal of the single-pole double-throw switch and the common node of the input terminal are connected to the second terminal of the voltage recovery unit; the second terminal of the third resistor, the first terminal of the second amplifier, and the common node of the source of the second metal oxide field-effect transistor are connected to the third terminal of the voltage recovery unit.

8. The circuit according to claim 7, characterized in that, The voltage recovery unit includes: The third amplifier, the first amplifying resistor, the second amplifying resistor, the third amplifying resistor, and the fourth amplifying resistor; Wherein, the first end of the first amplifying resistor is the first end of the voltage recovery unit; the common node of the second end of the first amplifying resistor and the first end of the third amplifying resistor is connected to the first end of the third amplifier; the first end of the second amplifying resistor is the third end of the voltage recovery unit; the common node of the second end of the second amplifying resistor and the first end of the fourth amplifying resistor is connected to the third end of the third amplifier; the common node of the second end of the third amplifying resistor and the second end of the third amplifier is the second end of the voltage recovery unit; the second end of the fourth amplifying resistor is grounded.

9. The circuit according to claim 1, characterized in that, The third terminal of the single-pole double-throw switch is connected to the input terminal of the signal conditioning unit in sequence through an analog-to-digital converter and a first optocoupler; the first terminal of the signal conditioning unit is connected to the output terminal of the signal conditioning unit in sequence through a digital-to-analog converter and a second optocoupler.

10. A controller, characterized in that, The controller includes a control signal conditioning circuit as described in any one of claims 1 to 9.

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