Drive circuit and vibration damping system

Abstract

The invention relates to a driving circuit and a vibration reduction system. The driving circuit comprises a driving control circuit and a gain adjusting circuit. The gain adjusting circuit is configured to collect a current signal of an output end of a target device; when the control signal meets a first preset condition, performing first processing on the current signal to obtain a first feedback signal, and transmitting the first feedback signal to the driving control circuit; when the control signal meets a second preset condition, performing second processing on the current signal to obtain a second feedback signal, and transmitting the second feedback signal to the driving control circuit; the driving control circuit is configured to respond to the received first feedback signal, and control the target device to be in a first output state according to the control signal; in response to the received second feedback signal, controlling the target device to be in a second output state according to the control signal; and the ratio of the magnitude of the force output by the target device in the first output state to the signal intensity of the control signal is smaller than the ratio of the magnitude of the force output by the target device in the second output state to the signal intensity of the control signal.

Description

Technical Field

[0001] This application relates to the field of precision vibration reduction technology, specifically to a drive circuit and a vibration reduction system. Background Technology

[0002] With the continuous improvement of the precision of ultra-precision machining equipment and measuring instruments, the vibration of their working environment is increasingly demanding of low amplitude and low frequency, which places more stringent requirements on the vibration reduction performance of vibration damping tables. Traditional passive vibration isolation technology, consisting of a mass-spring-damper system, cannot meet the vibration reduction requirements of ultra-precision equipment due to the inherent contradiction between the low-frequency vibration transmissibility and the high-frequency vibration attenuation rate. Therefore, there is an urgent need for new technologies and methods to improve this situation.

[0003] Active vibration damping is an important technology for solving the above problems. Active vibration damping systems typically use a motor drive to provide a force opposite to ground vibration or platform vibration, thereby achieving their active vibration damping function.

[0004] However, existing drive circuits used to drive motor output force have the problem of difficulty in balancing large-range output force and high-precision output force, which to some extent limits the application scenarios of active vibration reduction systems. Summary of the Invention

[0005] The purpose of this application is to provide a drive circuit and a vibration reduction system to solve the problem that existing drive circuits used to drive motor output force are unable to simultaneously achieve a wide range of output force and high-precision output force, thereby expanding the application scenarios of active vibration reduction systems.

[0006] This application provides a driving circuit including a driving control circuit and a gain adjustment circuit. The driving control circuit receives a control signal and is connected to the input terminal of a target device for outputting force. The gain adjustment circuit receives the control signal and is connected to both the output terminal of the target device and the driving control circuit. The gain adjustment circuit is configured to: acquire a current signal from the output terminal of the target device; when the received control signal meets a first preset condition, perform a first processing on the acquired current signal to obtain a first feedback signal, and transmit the first feedback signal to the driving control circuit; when the received control signal meets a second preset condition, perform a second processing on the acquired current signal to obtain a... The second feedback signal is received and transmitted to the drive control circuit. The drive control circuit is configured to: in response to receiving the first feedback signal, control the target device to be in a first output state according to the received control signal; in response to receiving the second feedback signal, control the target device to be in a second output state according to the received control signal; the control signal is used to control the magnitude of the force output by the target device, and the magnitude of the force output by the target device is directly proportional to the signal strength of the control signal; and the ratio of the magnitude of the force output by the target device in the first output state to the signal strength of the control signal is less than the ratio of the magnitude of the force output by the target device in the second output state to the signal strength of the control signal.

[0007] The gain adjustment circuit includes a state control circuit and a current processing circuit. The state control circuit receives a control signal, and the current processing circuit is connected to the output terminal of the target device, the drive control circuit, and the state control circuit, respectively, and has a first operating state and a second operating state. The state control circuit is configured to: transmit a first control signal to the current processing circuit when the received control signal meets a first preset condition, and transmit a second control signal to the current processing circuit when the received control signal meets a second preset condition. The current processing circuit is configured to: acquire the current signal at the output terminal of the target device; switch to the first operating state in response to receiving the first control signal, and while the current processing circuit is in the first operating state, attenuate the acquired current signal and transmit the attenuated current signal as a first feedback signal to the drive control circuit; and switch to the second operating state in response to receiving the second control signal, and while the current processing circuit is in the second operating state, transmit the acquired current signal as a second feedback signal to the drive control circuit.

[0008] The current processing circuit includes a first resistor, a second resistor, and a controllable switch. The first and second resistors are connected in series. The non-series connection end of the first resistor is connected to the output end of the target device, and the connection end between the first and second resistors is connected to the drive control circuit. The non-series connection end of the second resistor is connected to the first end of the controllable switch, and the second end of the controllable switch is grounded. The control end of the controllable switch is connected to the output end of the state control circuit. Specifically, when the received control signal meets a first preset condition, the state control circuit transmits a first control signal to the current processing circuit, and when the received control signal meets a second preset condition, it transmits a second control signal to the current processing circuit.

[0009] The controllable switch has a cutoff region operating state, an amplification region operating state, and a saturation region operating state. Furthermore, transmitting a first control signal to the controllable switch's control terminal to turn it on includes: transmitting the first control signal to the controllable switch's control terminal to cause the controllable switch to transition from the cutoff region operating state to the amplification region operating state to the saturation region operating state; transmitting a second control signal to the controllable switch's control terminal to turn it off includes: transmitting the second control signal to the controllable switch's control terminal to cause the controllable switch to transition from the saturation region operating state to the amplification region operating state to the cutoff region operating state.

[0010] The gain adjustment circuit also includes an overshoot protection circuit, which is connected between the output terminal of the state control circuit and the control terminal of the controllable switch. The overshoot protection circuit is configured to gradually change the voltage at the control terminal of the controllable switch to be the same as the voltage at the output terminal of the state control circuit when the voltage at the output terminal of the state control circuit is different from the voltage at the control terminal of the controllable switch.

[0011] The overshoot protection circuit includes a resistor-capacitor circuit.

[0012] The controllable switch is a transistor or a metal-oxide-semiconductor field-effect transistor.

[0013] The gain adjustment circuit also includes a buffer, which is connected between the current processing circuit and the drive control circuit and is configured to amplify the power of the signal transmitted between the current processing circuit and the drive control circuit.

[0014] Specifically, when the state control circuit transmits a first control signal to the current processing circuit when the received control signal meets the first preset condition, and transmits a second control signal to the current processing circuit when the received control signal meets the second preset condition, the following actions are taken: when the received control signal is greater than a preset negative voltage and less than a preset positive voltage, the first control signal is transmitted to the current processing circuit; and when the received control voltage signal is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, the second control signal is transmitted to the current processing circuit.

[0015] The state control circuit is a window comparator.

[0016] The drive control circuit includes a compensator and a power amplifier circuit. The compensator receives the control signal and is connected to both the power amplifier circuit and the gain adjustment circuit. The power amplifier circuit is connected to the input terminal of the target device. The compensator is configured to: perform compensation processing on the received control signal based on the feedback signal from the gain adjustment circuit to obtain a compensated signal, and then transmit the compensated signal to the power amplifier circuit. The power amplifier circuit is configured to: receive the compensated signal, amplify the received compensated signal, and transmit the amplified signal as a drive signal to the target device.

[0017] This application also provides a vibration reduction system, which includes the drive circuit of any of the above.

[0018] The beneficial effects of this application are as follows: The driving circuit and vibration reduction system provided by this application, the driving circuit can be applied to the vibration reduction system, and includes a driving control circuit and a gain adjustment circuit; wherein, the driving control circuit receives a control signal and is connected to the input terminal of the target device for outputting force, the gain adjustment circuit receives a control signal and is connected to the output terminal of the target device and the driving control circuit respectively; and, the gain adjustment circuit is configured to: acquire the current signal of the output terminal of the target device; when the received control signal meets a first preset condition, perform a first processing on the acquired current signal to obtain a first feedback signal, and transmit the first feedback signal to the driving control circuit; when the received control signal meets a second preset condition, perform a second processing on the acquired current signal to obtain a second feedback signal, and transmit the second feedback signal to the driving control circuit; the driving control circuit is configured to: respond to receiving the first feedback signal, control the target device to be in a first output state according to the received control signal; respond to receiving the second feedback signal, control the target device to be in a second output state according to the received control signal; the control signal is used to control the magnitude of the force output by the target device, and the target... The magnitude of the force output by the device is directly proportional to the signal strength of the control signal. Furthermore, the ratio of the force output by the target device in the first output state to the signal strength of the control signal is less than the ratio of the force output by the target device in the second output state to the signal strength of the control signal. Therefore, an innovative drive circuit for driving the output force of a target device (e.g., a voice coil motor) is proposed. This drive circuit, through a gain adjustment circuit, selects an appropriate processing method to process the output current signal of the target device according to different conditions satisfied by the control signal. The processed current signal is then transmitted as a feedback signal to the drive control circuit. The drive control circuit, based on the received feedback signal and control signal, controls the output state of the target device to achieve precise adjustment of the output force. Thus, in the process of driving the target device to output the expected force through the control signal, the output precision of the target device at low output can be improved while simultaneously meeting the demand for high output. This allows the drive circuit to adapt to control scenarios with both wide-range and high-precision output, improving the control performance of the drive circuit, broadening the application scenarios of the product, and enhancing its applicability. Attached Figure Description

[0019] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the drive circuit provided by related technologies; Figure 2This is a schematic diagram illustrating the relationship between the force output by the target device driven by the driving circuit and the control signal in related technologies. Figure 3 This is a schematic diagram of the driving circuit provided in the embodiment of this application; Figure 4 This is a schematic diagram showing the relationship between the force output by the target device driven by the driving circuit provided in this application embodiment and the control signal; Figure 5 This is a timing diagram of the control signals provided in an embodiment of this application; Figure 6 This is a timing diagram of the force output by the target device driven by the driving circuit provided in the embodiments of this application; Figure 7 This is another schematic diagram of the driving circuit provided in the embodiments of this application; Figure 8 This is another schematic diagram of the driving circuit provided in the embodiments of this application; Figure 9 This is another schematic diagram of the driving circuit provided in the embodiments of this application; Figure 10 This is another schematic diagram of the driving circuit provided in the embodiments of this application. Detailed Implementation

[0021] 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 a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0022] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0026] Please see Figure 1 , Figure 1 This is a schematic diagram of the drive circuit provided by related technologies. For example... Figure 1 As shown, in the related technology, the drive circuit A receives a control signal VIN and is connected to the target device A. Furthermore, the drive circuit A is configured to, in response to receiving the control signal VIN, drive the target device A to output a force according to the control signal VIN, and the magnitude of the force F output by the target device A driven by the drive circuit A is linearly proportional to the signal strength of the control signal VIN (e.g., ...). Figure 2 (As shown).

[0027] However, in the related technologies, the drive circuit A can only control the target device A to output power with a uniform output accuracy, but cannot adjust the output accuracy of the target device A. Therefore, the drive circuit A in the related technologies cannot simultaneously adapt to control scenarios with a wide range of output power and high-precision output power, thus limiting its application scenarios.

[0028] To address the aforementioned problems, this application provides a driving circuit and a vibration damping system. The driving circuit can be applied to a vibration damping system and includes a driving control circuit and a gain adjustment circuit. The driving control circuit receives a control signal and is connected to the input terminal of a target device for outputting force. The gain adjustment circuit receives the control signal and is connected to both the output terminal of the target device and the driving control circuit. The gain adjustment circuit is configured to: acquire a current signal from the output terminal of the target device; when the received control signal meets a first preset condition, perform a first processing on the acquired current signal to obtain a first feedback signal and transmit the first feedback signal to the driving control circuit; when the received control signal meets a second preset condition, perform a second processing on the acquired current signal to obtain a second feedback signal and transmit the second feedback signal to the driving control circuit. The driving control circuit is configured to: respond to receiving the first feedback signal, control the target device to be in a first output state according to the received control signal; respond to receiving the second feedback signal, control the target device to be in a second output state according to the received control signal. The control signal is used to control the magnitude of the force output by the target device. The magnitude of the force output by the device is directly proportional to the signal strength of the control signal. Furthermore, the ratio of the force output by the target device in the first output state to the signal strength of the control signal is less than the ratio of the force output by the target device in the second output state to the signal strength of the control signal. Therefore, an innovative drive circuit for driving the output force of a target device (e.g., a voice coil motor) is proposed. This drive circuit, through a gain adjustment circuit, selects an appropriate processing method to process the output current signal of the target device according to different conditions satisfied by the control signal. The processed current signal is then transmitted as a feedback signal to the drive control circuit. The drive control circuit, based on the received feedback signal and control signal, controls the output state of the target device to achieve precise adjustment of the output force. Thus, in the process of driving the target device to output the expected force through the control signal, the output precision of the target device at low output can be improved while simultaneously meeting the demand for high output. This allows the drive circuit to adapt to control scenarios with both wide-range and high-precision output, improving the control performance of the drive circuit, broadening the application scenarios of the product, and enhancing its applicability.

[0029] The following detailed description is based on specific embodiments. It should be noted that the sequence numbers of the following embodiments are not intended to limit the preferred order of the embodiments.

[0030] Please see Figures 3 to 6 As shown, Figure 3 This is a schematic diagram of the driving circuit provided in an embodiment of this application. Figure 4 This is a schematic diagram showing the relationship between the force output by the target device driven by the driving circuit provided in this application embodiment and the control signal. Figure 5 This is a timing diagram of the control signals provided in an embodiment of this application. Figure 6 This is a timing diagram illustrating the force output by the target device driven by the driving circuit provided in this embodiment of the application. For example... Figures 3 to 6 As shown, the drive circuit 10 includes a drive control circuit 11 and a gain adjustment circuit 12. The drive control circuit 11 receives a control signal VIN and is connected to the input terminal of the target device 20 used for outputting force. The gain adjustment circuit 12 receives the control signal VIN and is connected to both the output terminal of the target device 20 and the drive control circuit 11. The target device 20 can specifically be a motor (e.g., a voice coil motor) or other devices with the same or similar functions.

[0031] Specifically, the gain adjustment circuit 12 is configured to: acquire the current signal Io at the output terminal of the target device 20; when the received control signal VIN meets a first preset condition, perform a first processing on the acquired current signal Io to obtain a first feedback signal FB1, and transmit the first feedback signal FB1 to the drive control circuit 11; when the received control signal VIN meets a second preset condition, perform a second processing on the acquired current signal Io to obtain a second feedback signal FB2, and transmit the second feedback signal FB2 to the drive control circuit 11. The first and second processing can specifically be attenuation processing. For example, performing the first processing on the acquired current signal Io can specifically involve attenuating the acquired current signal Io by a first preset ratio, wherein the first preset ratio is less than 1 and can be a fixed value. Performing the second processing on the acquired current signal Io can specifically include attenuating the acquired current signal Io by a second preset ratio, wherein the second preset ratio is greater than the first preset ratio, and equal to or less than 1, and can be a fixed value.

[0032] Accordingly, the drive control circuit 11 is configured to: in response to receiving the first feedback signal FB1, control the target device 20 to be in a first output state according to the received control signal VIN; and in response to receiving the second feedback signal FB2, control the target device 20 to be in a second output state according to the received control signal VIN. Furthermore, the force F output by the target device 20 in the first output state can be less than the force F output in the second output state.

[0033] The control signal VIN is used to control the magnitude and direction of the force F output by the target device 20. Specifically, when the control signal VIN meets a first preset condition, it can control the force F output by the target device 20 within a first range. When the control signal VIN meets a second preset condition, it can control the force F output by the target device 20 within a second range, which is different from the first range. In some examples, the size of the first range can be smaller than the size of the second range, so that the force F output by the target device 20 in the first output state is smaller than the force F output in the second output state.

[0034] In this embodiment, as Figures 4 to 6 As shown, the magnitude of the force F output by the target device 20 can be directly proportional to the signal strength of the control signal VIN. Furthermore, the ratio of the magnitude of the force F output by the target device 20 in the first output state to the signal strength of the control signal VIN is less than the ratio of the magnitude of the force F output by the target device 20 in the second output state to the signal strength of the control signal VIN.

[0035] It should be noted that, in this embodiment, the ratio of the magnitude of the force F output by the target device 20 in the first output state to the signal strength of the control signal VIN (hereinafter referred to as the first ratio) can represent the output accuracy of the target device 20 in the first output state, and the ratio of the magnitude of the force F output by the target device 20 in the second output state to the signal strength of the control signal VIN (hereinafter referred to as the second ratio) can represent the output accuracy of the target device 20 in the second output state. Therefore, if the first ratio is less than the second ratio, it means that the output accuracy of the target device 20 in the first output state is less than the output accuracy of the target device 20 in the second output state. For example, the first ratio and the second ratio can be two different fixed values, or they can be two different ratio ranges.

[0036] Thus, by setting the output accuracy of the target device 20 in the first output state to be less than that in the second output state, the output accuracy of the target device 20 can be adjusted according to different conditions satisfied by the control signal VIN, thereby improving the control performance of the drive circuit 10.

[0037] Furthermore, by further setting the force F output by the target device 20 in the first output state to be less than the force F output in the second output state, it is also possible to improve the output accuracy of the target device 20 when outputting a smaller force while simultaneously meeting the demand for a larger output, so that the drive circuit 10 can be adapted to control scenarios with both a wide range of output and high precision output.

[0038] It is understandable that, such as Figure 3As shown, in the aforementioned drive circuit 10, the drive control circuit 11 and gain adjustment circuit 12 form a current control loop with the target device 20. The current loop gain of this current control loop is the ratio of the magnitude of the force F output by the target device 20 in its working state (e.g., the first output state or the second output state) to the signal strength of the control signal VIN. Furthermore, in this embodiment, by setting the ratio of the magnitude of the force F output by the target device 20 in different working states to the signal strength of the control signal VIN to be different, the current loop gain of this current control loop is adjustable. The purpose of the gain adjustment circuit 12 in this current control loop transmitting feedback signals (e.g., the first feedback signal FB1 or the second feedback signal FB2) to the drive control circuit 11 is to adjust the current loop gain of this current control loop. Different feedback signals will result in different current loop gains, thereby achieving precise control of the output accuracy of the target device 20. Moreover, this control process responds quickly and can meet the high-performance requirements of the drive circuit 10 in practical applications.

[0039] Furthermore, in order to achieve more precise control over the target device 20, the drive circuit 10 in this embodiment may also include a signal processing circuit configured to process the control signal VIN.

[0040] In this embodiment, as Figure 4 and Figure 5 As shown, the control signal VIN can specifically be a control voltage signal VIN. Furthermore, when the control voltage signal VIN is greater than a preset negative voltage and less than a preset positive voltage, the control voltage signal VIN is considered to satisfy the first preset condition; when the control voltage signal VIN is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, the control voltage signal VIN is considered to satisfy the second preset condition.

[0041] The control voltage signal VIN can be between a preset low voltage and a preset high voltage. The preset low voltage and the aforementioned preset negative voltage are both less than zero voltage (i.e., 0V), and the preset low voltage is less than the aforementioned preset negative voltage. The preset high voltage and the aforementioned preset positive voltage are both greater than zero voltage, and the preset high voltage is greater than the aforementioned preset positive voltage.

[0042] Specifically, the preset high voltage can be equal to the absolute value of the preset low voltage, and the preset positive voltage can be equal to the absolute value of the preset negative voltage.

[0043] For example, such as Figure 4 and Figure 5As shown, the preset high voltage and preset low voltage can be 10V and -10V respectively, and the preset positive voltage and preset negative voltage can be V1 and V2 respectively. V1 and V2 are represented as aV and -aV respectively, where a is greater than zero and less than 10. Furthermore, the specific value of a can be set according to the user's requirements for the output accuracy when the product is operating at low power. For example, a can be equal to 1.

[0044] In some examples, the control voltage signal VIN mentioned above can specifically be a sine wave signal, for example, it can specifically be... Figure 5 The sinusoidal signal shown is illustrated. Correspondingly, under the control of the control voltage signal VIN, the driving circuit 10 drives the force F output by the target device 20, and the curve of this force F changing with time can be obtained. Figure 6 As shown.

[0045] Specifically, such as Figures 4 to 6 As shown, when the control voltage signal VIN is greater than the preset negative voltage (i.e., V2) and less than the preset positive voltage (i.e., V1), the force F output by the target device 20 is between c and d, and its magnitude is directly proportional to the signal strength of the control voltage signal VIN. For example, it can be linearly proportional. At this time, the output force accuracy of the target device 20 (i.e., the first ratio mentioned above) is... Figure 4 The slope of the line segment corresponding to the force F in the horizontal coordinate interval from V2 to V1 indicates that the output accuracy of the target device 20 is relatively small, thereby realizing small gain control of the target device 20 and improving the large output control accuracy of the target device 20.

[0046] When the control voltage signal VIN is less than or equal to a preset negative voltage (i.e., V2) or greater than or equal to a preset positive voltage (i.e., V1), the magnitude of the force F output by the target device 20 is directly proportional to the signal strength of the control voltage signal VIN. For example, it can be linearly proportional. In this case, the output force accuracy of the target device 20 (i.e., the second ratio mentioned above) is... Figure 4 The slope of the line segment corresponding to the force F in the x-axis interval from -10V to V2 is, or is, Figure 4 The slope of the line segment corresponding to the force F in the horizontal coordinate interval from V1 to 10V indicates that the output accuracy of the target device 20 is relatively large, thereby realizing high-gain control of the target device 20 and meeting the high output control requirements of the target device 20.

[0047] In some embodiments, such as Figure 7As shown, in the drive circuit 10, the gain adjustment circuit 12 may include a state control circuit 121 and a current processing circuit 122. The state control circuit 121 receives a control signal VIN, and the current processing circuit 122 is connected to the output terminal of the target device 20, the drive control circuit 11, and the state control circuit 121, respectively. Furthermore, the current processing circuit 122 has two operating states (i.e., a first operating state and a second operating state) and can switch between these two states. Specifically, in the first operating state, the current processing circuit 122 can transmit a first feedback signal FB1 to the state control circuit 121, and in the first operating state, the current processing circuit 122 can transmit a second feedback signal FB2 to the state control circuit 121.

[0048] Specifically, the state control circuit 121 can be configured to: transmit a first control signal K1 to the current processing circuit 122 when the received control signal VIN meets a first preset condition; and transmit a second control signal K2 to the current processing circuit 122 when the received control signal VIN meets a second preset condition. The first control signal K1 and the second control signal K2 can be high level and low level, respectively.

[0049] Accordingly, the current processing circuit 122 can be configured to: acquire the current signal Io at the output terminal of the target device 20; switch to the first operating state in response to receiving the first control signal K1, and while the current processing circuit 122 is in the first operating state, attenuate the acquired current signal Io and transmit the attenuated current signal as the first feedback signal FB1 to the drive control circuit 11; and switch to the second operating state in response to receiving the second control signal K2, and while the current processing circuit 122 is in the second operating state, transmit the acquired current signal Io as the second feedback signal FB2 to the drive control circuit 11.

[0050] Specifically, when the current processing circuit 122 in the first working state attenuates the current signal Io it has acquired and transmits the attenuated current signal as the first feedback signal FB1 to the drive control circuit 11, it can perform the following: attenuate the current signal Io it has acquired by a first preset ratio and transmit the attenuated current signal as the first feedback signal FB1 to the drive control circuit 11. The first preset ratio is less than 1 and can be a fixed value.

[0051] In some specific embodiments, such as Figure 8As shown, the gain adjustment circuit 12 may further include a buffer 124. The buffer 124 is connected between the current processing circuit 122 and the drive control circuit 11 and is configured to amplify the power of the signal transmitted between the current processing circuit 122 and the drive control circuit 11. Thus, by setting the buffer 124, the power of the feedback signal (i.e., the first feedback signal FB1 or the second feedback signal FB2) is enhanced during transmission, which helps to improve the stability and reliability of the drive circuit 10.

[0052] In some examples, such as Figure 8 As shown, buffer 124 can be specifically an inverting amplifier, and the specific structure of the inverting amplifier and its connection relationship with other devices can be referred to Figure 8 This will not be elaborated upon here.

[0053] In some specific embodiments, such as Figure 8 As shown, in the aforementioned drive circuit 10, the current processing circuit 122 may include a first resistor R1, a second resistor R2, and a controllable switch KA. The first resistor R1 and the second resistor R2 are connected in series. The non-series connection end of the first resistor R1 is connected to the output terminal of the target device 20. The connection end between the first resistor R1 and the second resistor R2 is connected to the drive control circuit 11. The non-series connection end of the second resistor R2 is connected to the first terminal of the controllable switch KA. The second terminal of the controllable switch KA is grounded. The control terminal of the controllable switch KA is connected to the output terminal of the state control circuit 121.

[0054] Furthermore, when the received control signal VIN meets the first preset condition, the state control circuit 121 transmits the first control signal K1 to the current processing circuit 122. Specifically, when the received control signal VIN meets the first preset condition, the first control signal K1 is transmitted to the control terminal of the controllable switch KA so that the controllable switch KA is turned on.

[0055] When the state control circuit 121 transmits the second control signal K2 to the current processing circuit 122 when the received control signal VIN meets the second preset condition, it can specifically perform the following: when the received control signal VIN meets the second preset condition, it transmits the second control signal K2 to the control terminal of the controllable switch KA so that the controllable switch KA is turned off.

[0056] For example, the controllable switch KA can be a transistor or a metal-oxide-semiconductor field-effect transistor (i.e., a MOSFET) with a specific threshold voltage, such as a MOSFET. Correspondingly, the first control signal K1 can be a voltage signal with a voltage value greater than the threshold voltage of the switch, and the second control signal K2 can also be a voltage signal with a voltage value not greater than the threshold voltage of the switch.

[0057] It should be noted that in the current processing circuit 122 described above, when the controllable switch KA is in the on state, the current processing circuit 122 is in the first state, and the ratio of the first feedback signal FB1 transmitted by the current processing circuit 122 to the drive control circuit 11 to the current signal Io it has acquired is equal to R2 / (R1+R2), where R1 and R2 are the resistance values ​​of the first resistor R1 and the second resistor R2, respectively. This achieves the current processing circuit 122 attenuating the current signal Io it has acquired by a specific ratio (i.e., R2 / (R1+R2)) to obtain the attenuated current signal (i.e., the first feedback signal FB1).

[0058] Furthermore, when the controllable switch KA is in the off state, the current processing circuit 122 is in the second state, and the second feedback signal FB2 transmitted by the current processing circuit 122 to the drive control circuit 11 is the current signal Io it has collected. Thus, the current processing circuit 122, in the second state, does not change the magnitude of the current signal Io it has collected, but directly transmits the current signal Io as the second feedback signal FB2 to the drive control circuit 11.

[0059] Therefore, by reasonably setting the resistance values ​​of the first resistor R1 and the second resistor R2, the current processing circuit 122 in the first operating state can attenuate the acquired current signal Io by an appropriate proportion to obtain a first feedback signal FB1 of appropriate magnitude, thereby realizing the adjustment of the output accuracy of the target device 20 in the first output state. Furthermore, since the current processing circuit 122 in the second operating state does not change the magnitude of the acquired current signal Io, but directly transmits the current signal Io as the second feedback signal FB2 to the drive control circuit 11, the target device 20 can output a larger force F in the second output state to meet the demand for high output.

[0060] In some embodiments, such as Figure 8 As shown, the controllable switch KA can have a cutoff region operating state, an amplification region operating state, and a saturation region operating state, and the resistance characteristics corresponding to the cutoff region operating state, the amplification region operating state, and the saturation region operating state of the controllable switch KA are different. In some examples, the controllable switch KA can be a transistor or a metal-oxide-semiconductor field-effect transistor (i.e., a MOSFET) that has a cutoff region operating state, an amplification region operating state, and a saturation region operating state. For example, the controllable switch KA can specifically be a MOSFET.

[0061] Furthermore, the aforementioned transmission of the first control signal K1 to the control terminal of the controllable switch KA to turn on the controllable switch KA may include: transmitting the first control signal K1 to the control terminal of the controllable switch KA to cause the controllable switch KA to change from the cutoff region working state through the amplification region working state to the saturation region working state.

[0062] The above-mentioned transmission of the second control signal K2 to the control terminal of the controllable switch KA to turn off the controllable switch KA may include: transmitting the second control signal K2 to the control terminal of the controllable switch KA to change the controllable switch KA from the saturation region working state through the amplification region working state to the cutoff region working state.

[0063] Specifically, when the controllable switch KA is in the cutoff region, the internal resistance between the first and second terminals of the controllable switch KA is very large, and the controllable switch KA has no current amplification effect. This is equivalent to the controllable switch KA being in the open state, which makes it impossible for the controllable switch KA to form a voltage divider circuit with the first resistor R1 and the second resistor R2. At this time, the current processing circuit 122 is in the second working state, and the second feedback signal FB2 transmitted to the drive control circuit 11 is the current signal Io that has been collected, which ensures the large-range output requirements of the target device 20 under the large output state.

[0064] When the controllable switch KA is in the saturation region, the internal resistance between the first and second terminals of the controllable switch KA is very small, approximately zero. The controllable switch KA also has no current amplification effect and is in the conducting state. This causes the controllable switch KA to form a voltage divider circuit with the first resistor R1 and the second resistor R2, thereby attenuating the current signal Io and obtaining the first feedback signal FB1. At this time, the current processing circuit 122 is in the first working state and transmits the current signal (i.e., the first feedback signal FB1) attenuated by the voltage divider circuit to the drive control circuit 11, ensuring the high-precision output requirement of the target device 20 under low output conditions.

[0065] When the controllable switch KA is in the amplification region, the internal resistance between the first and second terminals of the controllable switch KA changes with the voltage at its control terminal, which can realize current amplification. Although the controllable switch KA is on, due to the existence of its on-resistance, the current processing circuit 122 will attenuate the current signal Io to a certain extent, but the attenuation is small and not completely equivalent to the attenuation effect of the current processing circuit 122 in the first working state. At this time, it is equivalent to the current processing circuit 122 transitioning between the first and second working states.

[0066] Thus, by carefully designing the conduction process of the controllable switch KA, it gradually transitions from its original cutoff region operating state through the amplification region operating state, and finally smoothly transitions to the saturation region operating state. This series of meticulous transition steps successfully achieves the slow conduction function of the controllable switch KA. This ingenious design allows the controllable switch KA to remain in the amplification region operating state for a necessary period of time, thereby ensuring that the current processing circuit 122 can smoothly switch the second feedback signal FB2 to the first feedback signal FB1 during the transmission of feedback signals to the drive control circuit 11. This smooth switching mechanism allows the target device 20 to smoothly transition from the second operating state to the first operating state, effectively avoiding overshoot caused by excessively rapid state switching. This not only significantly improves the control accuracy of the drive circuit 10, but also further reduces the noise generated by the target device 20 during operation, thereby optimizing the performance of the entire system.

[0067] Similarly, by carefully designing the turn-off process of the controllable switch KA, it gradually transitions from its original saturation region operating state through the amplification region operating state, and finally smoothly transitions to the cutoff region operating state. This series of meticulous transition steps successfully achieves the slow turn-off function of the controllable switch KA. This ingenious design allows the controllable switch KA to remain in the amplification region operating state for a necessary period of time, thereby ensuring that the current processing circuit 122 can smoothly switch the first feedback signal FB1 to the second feedback signal FB2 during the transmission of feedback signals to the drive control circuit 11. This smooth switching mechanism allows the target device 20 to smoothly transition from the first operating state to the second operating state, effectively avoiding overshoot caused by excessively rapid state switching. This not only significantly improves the control accuracy of the drive circuit 10, but also further reduces the noise generated by the target device 20 during operation, thereby optimizing the performance of the entire system.

[0068] In some specific embodiments, in order to achieve the slow turn-on and slow turn-off functions of the controllable switch KA, such as... Figure 9 As shown, the above-mentioned gain adjustment circuit 12 may also include an overshoot protection circuit 123, which is connected between the output terminal of the state control circuit 121 and the control terminal of the controllable switch KA.

[0069] Furthermore, the overshoot protection circuit 123 is configured to gradually change the voltage at the control terminal of the controllable switch KA to be the same as the voltage at the output terminal of the state control circuit 121 when the voltage at the output terminal of the state control circuit 121 is different from the voltage at the control terminal of the controllable switch KA. The voltage at the output terminal of the state control circuit 121 is the control signal (i.e., the first control signal K1 or the second control signal K2) transmitted by the state control circuit 121 to the control terminal of the controllable switch KA. Both the first control signal K1 and the second control signal K2 are voltage signals; for example, the first control signal K1 and the second control signal K2 can be high level and low level, respectively.

[0070] Specifically, when the voltage at the output terminal of the state control circuit 121 is higher than the voltage at the control terminal of the controllable switch KA, the overshoot protection circuit 123 gradually raises the voltage at the control terminal of the controllable switch KA to the same level as the voltage at the output terminal of the state control circuit 121; when the voltage at the output terminal of the state control circuit 121 is lower than the voltage at the control terminal of the controllable switch KA, the overshoot protection circuit 123 gradually lowers the voltage at the control terminal of the controllable switch KA to the same level as the voltage at the output terminal of the state control circuit 121. In this way, the voltage at the control terminal of the controllable switch KA is gradually and smoothly adjusted, enabling slow switching on and off of the controllable switch KA. This avoids instantaneous switching on or off of the controllable switch KA due to voltage fluctuations, further reducing overshoot phenomena that may be caused by rapid state switching, and improving the stability and reliability of the entire system.

[0071] There are multiple ways to implement the overshoot protection circuit 123. In some examples, such as... Figure 10 As shown, the overshoot protection circuit 123 may include a resistor-capacitor circuit (i.e., an RC circuit), specifically an RC circuit, where the RC circuit may be a specific RC delay circuit. Specifically, when the output voltage of the state control circuit 121 changes, that is, when the control signal transmitted by the state control circuit 121 to the control terminal of the controllable switch KA changes from the first control signal K1 to the second control signal K2, or from the second control signal K2 to the first control signal K1, the RC circuit allows the control terminal voltage of the controllable switch KA to gradually change to be the same as the output voltage of the state control circuit 121, thereby achieving the effect of slowly turning on or slowly turning off the controllable switch KA.

[0072] In some examples, the overshoot protection circuit 123 may also include a current-limiting element, such as a current-limiting resistor, to protect the controllable switch KA from excessive current surges, further enhancing the safety and reliability of the entire circuit.

[0073] In some specific embodiments, when the state control circuit 121 transmits the first control signal K1 to the current processing circuit 122 when the received control signal VIN meets the first preset condition, it can specifically perform the following: when the received control signal VIN is greater than a preset negative voltage and less than a preset positive voltage, it transmits the first control signal K1 to the current processing circuit 122.

[0074] When the aforementioned state control circuit 121 transmits the second control signal K2 to the current processing circuit 122 when the received control signal VIN meets the second preset condition, it can specifically perform the following: when the received control voltage signal is less than or equal to a preset negative voltage or greater than or equal to a preset positive voltage, it transmits the second control signal K2 to the current processing circuit 122.

[0075] And, as Figure 10 As shown, the aforementioned state control circuit 121 can specifically be a window comparator. The window comparator has two reference voltages: a positive reference voltage and a negative reference voltage. The positive reference voltage is equal to the aforementioned preset positive voltage, and the negative reference voltage is equal to the aforementioned preset negative voltage. When the input control signal VIN is between the positive and negative reference voltages, the window comparator outputs a high-level signal as the first control signal K1; when the input control signal VIN is less than or equal to the negative reference voltage or greater than or equal to the positive reference voltage, the window comparator outputs a low-level signal as the second control signal K2. This design enables the state control circuit 121 to accurately output the corresponding control signal based on the magnitude of the control signal VIN, thereby achieving precise control of the controllable switch KA.

[0076] In the above embodiments, such as Figure 10 As shown, the aforementioned drive control circuit 11 can be specifically an amplification and compensation circuit, and may include a compensator 111 and a power amplifier circuit 112. The compensator 111 receives the control signal VIN and is connected to the power amplifier circuit 112 and the gain adjustment circuit 12 (for example, the connection point between the first resistor R1 and the second resistor R2 in the gain adjustment circuit 12). The power amplifier circuit 112 is connected to the input terminal of the target device 20.

[0077] Furthermore, the compensator 111 is configured to: perform compensation processing on the received control signal VIN according to the feedback signal of the gain adjustment circuit 12 (i.e., the first feedback signal FB1 or the second feedback signal FB2), obtain the compensated signal, and transmit the compensated signal to the power amplifier circuit 112. The compensation processing may include, but is not limited to, proportional, integral, and derivative algorithms to achieve precise adjustment of the control signal VIN.

[0078] The power amplifier circuit 112 is configured to receive the compensated signal, amplify the received compensated signal, and transmit the amplified signal as a drive signal Vo to the target device 20 to drive the target device 20 to output force.

[0079] It should be noted that, since the compensator 111 performs different compensation processing on the control signal VIN according to the different feedback signals received, the power amplifier circuit 112 can output a drive signal Vo that matches the required output accuracy of the target device 20, thereby realizing the control of the output accuracy of the target device 20.

[0080] In some examples, in the drive control circuit 11 described above, the compensator 111 can specifically be a proportional-integral controller (often simply referred to as a PI controller). This controller, by combining proportional and integral control mechanisms, can effectively regulate the system output, making it more stable and precise. The proportional control section is responsible for making immediate adjustments based on the current error, while the integral control section accumulates historical errors to eliminate steady-state errors, thereby achieving a more optimized control effect.

[0081] In some specific application scenarios, the aforementioned drive circuit 10 can be applied to a vibration reduction system, which may include a load and the aforementioned target device 20. The aforementioned drive circuit 10 is specifically used to drive the target device 20 in the vibration reduction system to output force in order to achieve vibration reduction of the load.

[0082] As can be seen from the above, the driving circuit provided in this embodiment includes a driving control circuit and a gain adjustment circuit. The driving control circuit receives a control signal and is connected to the input terminal of the target device used for outputting force. The gain adjustment circuit receives the control signal and is connected to the output terminal of the target device and the driving control circuit, respectively. Furthermore, the gain adjustment circuit is configured to: acquire the current signal at the output terminal of the target device; when the received control signal meets a first preset condition, perform a first processing on the acquired current signal to obtain a first feedback signal, and transmit the first feedback signal to the driving control circuit; when the received control signal meets a second preset condition, perform a second processing on the acquired current signal to obtain a second feedback signal, and transmit the second feedback signal to the driving control circuit. The driving control circuit is configured to: respond to receiving the first feedback signal, control the target device to be in a first output force state according to the received control signal; respond to receiving the second feedback signal, control the target device to be in a second output force state according to the received control signal; the control signal is used to control the magnitude of the force output by the target device, and the magnitude of the force output by the target device is related to the control signal. The signal strengths are directly proportional; and the ratio of the force output by the target device in the first output state to the signal strength of the control signal is less than the ratio of the force output by the target device in the second output state to the signal strength of the control signal. Therefore, an innovative drive circuit for driving the output force of a target device (e.g., a voice coil motor) is proposed. This drive circuit, through a gain adjustment circuit, selects an appropriate processing method to process the output current signal of the target device according to different conditions satisfied by the control signal, and transmits the processed current signal as a feedback signal to the drive control circuit. The drive control circuit then controls the output state of the target device based on the received feedback signal and control signal to achieve precise adjustment of the output force of the target device. Thus, in the process of driving the target device to output the expected force through the control signal, the output precision of the target device at low output can be improved while simultaneously meeting the demand for high output. This allows the drive circuit to adapt to control scenarios with both wide-range and high-precision output, improving the control performance of the drive circuit, broadening the application scenarios of the product, and enhancing its applicability.

[0083] This application also provides a vibration reduction system, which includes a drive circuit of any of the above embodiments and a target device (e.g., a voice coil motor) for outputting force. The drive circuit is used to drive the target device to output force so as to realize the active vibration reduction function of the vibration reduction system.

[0084] Specifically, the driving circuit includes a driving control circuit and a gain adjustment circuit. The driving control circuit receives a control signal and is connected to the input terminal of the target device used for output force. The gain adjustment circuit receives the control signal and is connected to both the output terminal of the target device and the driving control circuit. The gain adjustment circuit is configured to: acquire the current signal at the output terminal of the target device; when the received control signal meets a first preset condition, perform a first processing on the acquired current signal to obtain a first feedback signal, and transmit the first feedback signal to the driving control circuit; when the received control signal meets a second preset condition, perform a second processing on the acquired current signal to obtain a second feedback signal, and transmit the second feedback signal to the driving control circuit. The driving control circuit is configured to: respond to receiving the first feedback signal, control the target device to be in a first output force state according to the received control signal; and respond to receiving the second feedback signal, control the target device to be in a second output force state according to the received control signal.

[0085] The control signal is used to control the magnitude of the force output by the target device, and the magnitude of the force output by the target device is directly proportional to the signal strength of the control signal. Furthermore, the ratio of the magnitude of the force output by the target device in the first output state to the signal strength of the control signal is less than the ratio of the magnitude of the force output by the target device in the second output state to the signal strength of the control signal.

[0086] In some embodiments, the vibration reduction system may further include a load, and the drive circuit may be specifically used to drive the target device to output force in order to achieve vibration reduction of the load.

[0087] Specifically, the vibration reduction system may further include a base plate and a top plate that are spaced apart from each other, and the drive circuit and target device may be located between the base plate and the top plate. The load may be fixed above the top plate, thereby achieving vibration reduction of the load.

[0088] In some specific embodiments, the vibration damping system may further include a spring damping assembly and a sensor assembly disposed between the bottom plate and the top plate. One end (i.e., the top end) of the spring damping assembly is fixed to the top plate, and the other end (i.e., the bottom end) of the spring damping assembly is fixed to the bottom plate. The sensor assembly is fixed to the top plate and is used to detect the movement of the top plate.

[0089] Specifically, the vibration reduction system may also include a controller, which can generate a control signal based on the detection results of the sensor components and send the control signal to the input terminal of each drive branch in the drive circuit.

[0090] In some embodiments, the vibration damping system may include one or more drive circuits, and the vibration damping system may also include one or more target devices, with each drive circuit corresponding to a target device. Furthermore, in the vibration damping system, the drive control circuit of each drive circuit can be connected to the input terminal of its corresponding target device, and the gain adjustment circuit of each drive circuit can be connected to the output terminal of its corresponding target device, thereby enabling each drive circuit to drive its corresponding target device to output force, thus realizing the active vibration damping function of the vibration damping system.

[0091] It should be noted that the vibration reduction system provided in this application embodiment, because it is equipped with the drive circuit provided in this application embodiment, can achieve the beneficial effects that any drive circuit provided in this application embodiment can achieve. For details, please refer to the previous embodiments, which will not be repeated here.

[0092] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A driving circuit, characterized in that, It includes a drive control circuit and a gain adjustment circuit; wherein, the drive control circuit receives a control signal and is connected to the input terminal of the target device for outputting force, and the gain adjustment circuit receives the control signal and is connected to the output terminal of the target device and the drive control circuit respectively; Furthermore, the gain adjustment circuit is configured to: acquire the current signal at the output terminal of the target device; when the received control signal meets a first preset condition, perform a first processing on the acquired current signal to obtain a first feedback signal, and transmit the first feedback signal to the drive control circuit; when the received control signal meets a second preset condition, perform a second processing on the acquired current signal to obtain a second feedback signal, and transmit the second feedback signal to the drive control circuit. The drive control circuit is configured to: in response to receiving the first feedback signal, control the target device to be in a first output state according to the received control signal; and in response to receiving the second feedback signal, control the target device to be in a second output state according to the received control signal. The control signal is used to control the magnitude of the force output by the target device, and the magnitude of the force output by the target device is directly proportional to the signal strength of the control signal; furthermore, the ratio of the magnitude of the force output by the target device in the first output state to the signal strength of the control signal is less than the ratio of the magnitude of the force output by the target device in the second output state to the signal strength of the control signal.

2. The driving circuit according to claim 1, characterized in that, The gain adjustment circuit includes a state control circuit and a current processing circuit; wherein, the state control circuit receives the control signal, and the current processing circuit is connected to the output terminal of the target device, the drive control circuit and the state control circuit respectively, and has a first working state and a second working state. Furthermore, the state control circuit is configured to: transmit a first control signal to the current processing circuit when the received control signal meets the first preset condition, and transmit a second control signal to the current processing circuit when the received control signal meets the second preset condition. The current processing circuit is configured to: acquire the current signal at the output terminal of the target device; in response to receiving the first control signal, switch to the first operating state, and while the current processing circuit is in the first operating state, attenuate the acquired current signal and transmit the attenuated current signal as the first feedback signal to the drive control circuit; in response to receiving the second control signal, switch to the second operating state, and while the current processing circuit is in the second operating state, transmit the acquired current signal as the second feedback signal to the drive control circuit.

3. The driving circuit according to claim 2, characterized in that, The current processing circuit includes a first resistor, a second resistor, and a controllable switch; Wherein, the first resistor and the second resistor are connected in series, the non-series connection end of the first resistor is connected to the output end of the target device, and the connection end between the first resistor and the second resistor is connected to the drive control circuit; the non-series connection end of the second resistor is connected to the first end of the controllable switch, and the second end of the controllable switch is grounded; the control end of the controllable switch is connected to the output end of the state control circuit. Furthermore, when the state control circuit transmits a first control signal to the current processing circuit when the received control signal meets the first preset condition, and transmits a second control signal to the current processing circuit when the received control signal meets the second preset condition, the specific execution is as follows: When the received control signal meets the first preset condition, a first control signal is transmitted to the control terminal of the controllable switch to turn the controllable switch on. When the received control signal meets the second preset condition, a second control signal is transmitted to the control terminal of the controllable switch to turn the controllable switch off.

4. The driving circuit according to claim 3, characterized in that, The controllable switch has a cutoff region working state, an amplification region working state, and a saturation region working state. Furthermore, transmitting a first control signal to the controllable switch's control terminal to turn on the controllable switch includes: A first control signal is transmitted to the control terminal of the controllable switch so that the controllable switch changes from the cutoff region working state through the amplification region working state to the saturation region working state. The step of transmitting a second control signal to the controllable switch to turn off the controllable switch includes: A second control signal is transmitted to the control terminal of the controllable switch so that the controllable switch changes from the saturation region working state through the amplification region working state to the cutoff region working state.

5. The driving circuit according to claim 4, characterized in that, The gain adjustment circuit also includes an overshoot protection circuit, which is connected between the output terminal of the state control circuit and the control terminal of the controllable switch. Furthermore, the overshoot protection circuit is configured to gradually change the voltage at the control terminal of the controllable switch to be the same as the voltage at the output terminal of the state control circuit when the voltage at the output terminal of the state control circuit is different from the voltage at the control terminal of the controllable switch.

6. The driving circuit according to claim 5, characterized in that, The overshoot protection circuit includes a resistor-capacitor circuit.

7. The driving circuit according to claim 4, characterized in that, The controllable switch is a transistor or a metal-oxide-semiconductor field-effect transistor.

8. The driving circuit according to claim 2, characterized in that, The gain adjustment circuit further includes a buffer connected between the current processing circuit and the drive control circuit, and configured to amplify the power of the signal transmitted between the current processing circuit and the drive control circuit.

9. The driving circuit according to claim 2, characterized in that, When the state control circuit transmits a first control signal to the current processing circuit when the received control signal meets the first preset condition, and transmits a second control signal to the current processing circuit when the received control signal meets the second preset condition, the specific execution is as follows: When the received control signal is greater than a preset negative voltage and less than a preset positive voltage, a first control signal is transmitted to the current processing circuit; and when the received control voltage signal is less than or equal to the preset negative voltage or greater than or equal to the preset positive voltage, a second control signal is transmitted to the current processing circuit.

10. The driving circuit according to claim 9, characterized in that, The state control circuit is a window comparator.

11. The driving circuit according to claim 1, characterized in that, The drive control circuit includes a compensator and a power amplifier circuit. The compensator receives the control signal and is connected to the power amplifier circuit and the gain adjustment circuit, respectively. The power amplifier circuit is connected to the input terminal of the target device. Furthermore, the compensator is configured to: perform compensation processing on the received control signal according to the feedback signal of the gain adjustment circuit to obtain a compensated signal, and transmit the compensated signal to the power amplifier circuit; The power amplifier circuit is configured to: receive the compensated signal, amplify the received compensated signal, and transmit the amplified signal as a drive signal to the target device.

12. A vibration reduction system, characterized in that, Includes the driving circuit described in any one of claims 1 to 11.

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