Piezoelectric ceramic driving circuit device and nano motor

Abstract

The invention relates to the technical field of nanometer operation and power amplifiers, in particular to a piezoelectric ceramic driving circuit device and a nanometer motor, and the piezoelectric ceramic driving circuit device comprises a signal preliminary amplification unit, a first-stage push-pull unit and a second-stage push-pull unit which are cascaded in sequence; wherein the signal preliminary amplification unit receives an input sawtooth wave signal, and dynamically adjusts the working state of a power tube based on the difference value between the drain electrode voltage of the power tube and the sawtooth wave signal, so as to realize the preliminary voltage linear amplification of the sawtooth wave signal; the first-stage push-pull unit is used for improving the driving current amplitude and slew rate of the preliminarily amplified signal; and the second-stage push-pull unit is used for realizing power amplification of the signal and outputting a high-fidelity driving signal to the piezoelectric ceramic. According to the invention, the stick-slip motion requirement of the piezoelectric ceramic can be accurately matched, and the motion precision of the nano motor is remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of nano-operation and power amplifier technology, and in particular to a piezoelectric ceramic drive circuit device and a nano-motor. Background Art

[0002] Nanomotors are miniature motors that work at the nanoscale. They have extremely small sizes and unique performance characteristics. They are currently widely used in biomedicine, nanorobotics, microelectromechanical systems and other fields, and have broad application prospects and huge development potential.

[0003] Piezoelectric drive is one of the main driving methods for nanomotors. The movement of nanomotors relies on the stick-slip effect of piezoelectric ceramics. This stick-slip effect can be divided into a sticking phase and a sliding phase. In the sticking phase, the piezoelectric ceramic and the component move together in response to a slowly rising electrical signal. Static friction acts as the driving force, and the two "stick" together. In the sliding phase, the voltage signal drops rapidly, causing the piezoelectric ceramic to retract quickly. The slider comes to rest due to inertia and slides relative to the piezoelectric ceramic to maintain its original position. Due to the stick-slip effect, a sawtooth voltage signal is typically used to excite the piezoelectric ceramic, causing it to slowly extend during the sticking phase and rapidly contract during the sliding phase.

[0004] However, the piezoelectric ceramic drive circuit device in the prior art has many shortcomings:

[0005] One is the insufficient driving capability, which makes it difficult to provide sufficient driving current and voltage to meet the demand for precise movement of piezoelectric ceramics;

[0006] The second problem is that the slew rate is low, and the voltage signal rises and falls slowly, which cannot match the requirement of rapid voltage change during the sliding phase of the stick-slip effect.

[0007] The third problem is that the output ripple is large, which causes the piezoelectric ceramic to be driven unstable, affecting the smoothness and accuracy of the movement;

[0008] Fourthly, the signal fidelity is poor. Waveform distortion is likely to occur during the power amplification process, and the input sawtooth wave signal cannot be accurately reproduced, thereby reducing the movement accuracy of the nanomotor.

[0009] At the same time, the circuit structure design may not fully utilize the advantages of different transistor types, resulting in poor performance in terms of power loss and response speed. It may also lack effective filtering and protection mechanisms, affecting the circuit's stability and reliability. Therefore, designing a piezoelectric ceramic drive circuit device with high-fidelity, high-voltage, and high-slew-rate output is a key technical issue to be solved in this field. Summary of the Invention

[0010] Therefore, the technical problem to be solved by the present invention is to overcome the problem that the piezoelectric ceramic driving circuit device in the prior art is difficult to meet the requirements of the nanomotor for high fidelity, high voltage and high slew rate of the driving signal.

[0011] To solve the above technical problems, the present invention provides a piezoelectric ceramic drive circuit device and a nanomotor, wherein the piezoelectric ceramic drive circuit device comprises: a signal preliminary amplification unit, a first-stage push-pull unit, and a second-stage push-pull unit connected in cascade sequence;

[0012] The signal preliminary amplification unit receives an input sawtooth wave signal and dynamically adjusts the working state of the power tube based on the difference between the drain voltage of the power tube and the sawtooth wave signal, so as to achieve preliminary voltage linear amplification of the sawtooth wave signal;

[0013] The first-stage push-pull unit is used to increase the driving current amplitude and slew rate of the signal after preliminary amplification;

[0014] The second-stage push-pull unit is used to achieve signal power amplification and output a high-fidelity driving signal to the piezoelectric ceramic.

[0015] In one embodiment of the present invention, the signal preliminary amplification unit includes a first switching tube, a first resistor, a second resistor and an amplification gain adjustment module, the source of the first switching tube is grounded through the first resistor, the gate of the first switching tube receives the input sawtooth wave signal and is connected to a DC high-voltage power supply through the second resistor, the drain of the first switching tube is connected to the input end of the first-stage push-pull unit, and is connected to the DC high-voltage power supply through the amplification gain adjustment module.

[0016] In one embodiment of the present invention, the amplification gain adjustment module includes a third resistor and a fourth resistor, the first end of the third resistor is commonly connected to the drain of the first switching tube and the input end of the first-stage push-pull unit, the second end of the third resistor is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the DC high-voltage power supply.

[0017] In one embodiment of the present invention, the first-stage push-pull unit includes a second switching transistor, a third switching transistor, and a fifth resistor. The bases of the second switching transistor and the third switching transistor are commonly connected to the output end of the preliminary signal amplifying unit, and the emitters of the second switching transistor and the third switching transistor are commonly connected to form a complementary push-pull structure, which is used to improve the driving current amplitude and slew rate of the output signal of the preliminary signal amplifying unit and output an optimized signal.

[0018] A first end of the fifth resistor is commonly connected to the bases of the second switching transistor and the third switching transistor, and a second end thereof is commonly connected to the emitters of the second switching transistor and the third switching transistor, forming a feedback path to stabilize the working state of the push-pull circuit;

[0019] The collector of the second switching tube is connected to a DC high-voltage power supply, and the collector of the third switching tube is grounded.

[0020] In one embodiment of the present invention, the first-stage push-pull unit further includes a first protection module, which includes a first diode and a second diode, the anodes of the first diode and the second diode are connected, the cathode of the first diode is connected to the base of the second switching tube, and the cathode of the second diode is commonly connected to the emitters of the second switching tube and the third switching tube.

[0021] In one embodiment of the present invention, the second-stage push-pull unit includes a fourth switch tube, a fifth switch tube, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor;

[0022] The gates of the fourth switching tube and the fifth switching tube are connected to the output end of the first-stage push-pull unit, the drain of the fourth switching tube is connected to the first end of the sixth resistor, and the second end of the sixth resistor is connected to a DC high-voltage power supply; the source of the fourth switching tube is connected to the source of the fifth switching tube, and the drain of the fifth switching tube is grounded through the seventh resistor;

[0023] A first end of the eighth resistor is connected to the gates of the fourth switching transistor and the fifth switching transistor, and a second end thereof is connected to the sources of the fourth switching transistor and the fifth switching transistor;

[0024] A first end of the ninth resistor is connected to the gates of the fourth switching transistor and the fifth switching transistor, and a second end of the ninth resistor is grounded.

[0025] In one embodiment of the present invention, the second-stage push-pull unit further includes a second protection module, which includes a third diode and a fourth diode, the anodes of the third diode and the fourth diode are connected, the cathode of the third diode is connected to the gates of the fourth switching tube and the fifth switching tube, and the cathode of the fourth diode is connected to the source of the fourth switching tube and the fifth switching tube.

[0026] In one embodiment of the present invention, the second-stage push-pull unit further includes a high-frequency noise suppression module, which includes a first inductor and a second inductor, wherein the first end of the first inductor is connected to the source of the fourth switching tube, and the second end of the first inductor is connected to the first end of the second inductor, and the second end of the second inductor is connected to the source of the fifth switching tube.

[0027] In one embodiment of the present invention, the second-stage push-pull unit further includes a low-pass filtering module, which includes a third inductor and a capacitor. The first end of the third inductor is connected to the source of the fourth switching tube and the fifth switching tube, and the second end of the third inductor is connected to the first end of the capacitor. The second end of the capacitor is grounded.

[0028] Based on the same inventive concept, the present invention also provides a nanomotor, comprising the piezoelectric ceramic drive circuit device and piezoelectric ceramics, wherein the output end of the piezoelectric ceramic drive circuit device is connected to the piezoelectric ceramics for driving the piezoelectric ceramics to achieve stick-slip motion.

[0029] The above technical solution of the present invention has the following advantages over the prior art:

[0030] The present invention forms a complete and efficient signal processing chain by cascading a signal preliminary amplification unit, a first-stage push-pull unit and a second-stage push-pull unit in sequence. The signal preliminary amplification unit is dynamically adjusted based on the difference between the power tube drain voltage and the sawtooth wave signal to achieve preliminary linear amplification, and the amplification gain adjustment module can flexibly adjust the amplification effect; the first-stage push-pull unit improves the driving current and slew rate through a complementary push-pull structure, and the feedback path and the first protection module ensure working stability and device safety; the second-stage push-pull unit further realizes power amplification, and the second protection module, the high-frequency noise suppression module and the low-pass filtering module respectively play the role of protecting the device, suppressing high-frequency noise and optimizing the output waveform, and finally outputs a high-fidelity driving signal, which accurately matches the stick-slip motion requirements of piezoelectric ceramics and significantly improves the motion accuracy of the nanomotor. The overall circuit structure is reasonably designed, the performance is stable and reliable, and the modules work together to fully meet the high-precision requirements of the nanomotor for the driving signal. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings, wherein:

[0032] Figure 1 1 is a schematic structural diagram of a piezoelectric ceramic driving circuit device provided in an embodiment of the present invention;

[0033] Figure 2 is a schematic diagram of the specific structure of a piezoelectric ceramic driving circuit device provided in an embodiment of the present invention;

[0034] Figure 3 This is a schematic diagram of the circuit structure of the signal preliminary amplification unit;

[0035] Figure 4 Schematic diagram of the circuit structure of the first-stage push-pull unit;

[0036] Figure 5Schematic diagram of the circuit structure of the second-stage push-pull unit;

[0037] Description of the accompanying drawings in the specification: 10, signal preliminary amplification unit; 20, first-stage push-pull unit; 30, second-stage push-pull unit. DETAILED DESCRIPTION

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0039] Example 1:

[0040] like Figure 1 As shown, the present invention provides a piezoelectric ceramic driving circuit device, which includes: a signal preliminary amplification unit 10, a first-stage push-pull unit 20, and a second-stage push-pull unit 30 connected in cascade sequence;

[0041] The signal preliminary amplification unit 10 receives an input sawtooth wave signal and dynamically adjusts the working state of the power tube based on the difference between the drain voltage of the power tube and the sawtooth wave signal, so as to achieve preliminary voltage linear amplification of the sawtooth wave signal.

[0042] The first-stage push-pull unit 20 is used to increase the driving current amplitude and slew rate of the signal after preliminary amplification;

[0043] The second-stage push-pull unit 30 is used to amplify the power of the signal and output a high-fidelity driving signal to the piezoelectric ceramic.

[0044] As can be seen from the above technical solution, the piezoelectric ceramic drive circuit device provided by the present invention forms an efficient and coordinated signal processing chain by cascading a signal preliminary amplification unit 10, a first-stage push-pull unit 20, and a second-stage push-pull unit 30. This device has significant advantages: the signal preliminary amplification unit 10 dynamically adjusts its operating state based on the difference between the power tube drain voltage and the sawtooth wave signal, achieving preliminary voltage linear amplification of the input sawtooth wave signal, laying a precise foundation for subsequent processing; the first-stage push-pull unit 20 effectively improves the driving current amplitude and slew rate of the signal after preliminary amplification, enhancing the signal driving capability; the second-stage push-pull unit 30 further achieves power amplification and outputs a high-fidelity driving signal, which can accurately match the operating characteristics of the piezoelectric ceramic, reduce motion errors, and significantly improve its motion accuracy. The overall circuit enhances the driving capability in a step-by-step manner, ensuring the linearity, accuracy, and output quality of the signal amplification. The units are closely connected, with stable and reliable performance, which can efficiently meet the driving requirements of the piezoelectric ceramic.

[0045] Figure 2FIG1 shows a circuit topology diagram of the piezoelectric ceramic driving circuit device provided by the present invention. Specifically, Figure 3 As shown, in this embodiment, the signal preliminary amplification unit 10 includes a first switch Q1, a first resistor R1, a second resistor R2, and an amplification gain adjustment module. The first switch Q1 is an NMOS transistor. The source of the first switch Q1 is grounded through the first resistor R1. The gate of the first switch Q1 receives the input sawtooth wave signal to control the change of drain current. The gate is connected to the DC high-voltage power supply VCC through the second resistor R2 to form a voltage divider bias, ensuring that the first switch Q1 operates in the linear amplification region under the input sawtooth wave signal. The first resistor R1 acts as a source feedback resistor to stabilize the quiescent current of the first switch Q1, improve the circuit's anti-interference capability, and affect the voltage gain. A larger resistance value indicates a greater gain.

[0046] The drain of the first switching transistor Q1 is connected to the input of the first-stage push-pull unit 20 and is connected to the DC high-voltage power supply VCC via the amplifier gain adjustment module. Furthermore, the amplifier gain adjustment module includes a third resistor R3 and a fourth resistor R4. The first end of the third resistor R3 is commonly connected to the drain of the first switching transistor Q1 and the input of the first-stage push-pull unit 20, and the second end of the third resistor R3 is connected to the first end of the fourth resistor R4. The second end of the fourth resistor R4 is connected to the DC high-voltage power supply VCC. The third resistor R3 and the fourth resistor R4 function to divide the voltage in series, feeding the divided DC high-voltage power supply VCC back to the drain of the first switching transistor Q1 to dynamically adjust the drain voltage. Furthermore, by adjusting the ratio of their resistances, the circuit's voltage amplification factor is precisely controlled to meet the driving requirements of different piezoelectric ceramics. This optimizes the output impedance and ensures efficient signal transmission to the subsequent first-stage push-pull unit 20.

[0047] like Figure 4 As shown, in this embodiment, the first-stage push-pull unit 20 includes a second switch Q2, a third switch Q3, and a fifth resistor R5. The second switch Q2 is an NPN transistor, and the third switch Q3 is a PNP transistor. The bases of the second switch Q2 and the third switch Q3 are commonly connected to the output terminal of the preliminary signal amplification unit 10 (i.e., the drain of the first switch Q1), and their emitters are commonly connected to form a complementary push-pull structure. This architecture significantly improves the drive current amplitude and slew rate of the output signal of the preliminary signal amplification unit 10 through the alternating operation of the second switch Q2 (which provides a forward current when turned on) and the third switch Q3 (which provides a reverse current when turned on), achieving a first-stage enhancement of the signal carrying capacity and outputting an optimized intermediate-stage drive signal.

[0048] A first end of the fifth resistor R5 is commonly connected to the bases of the second switching transistor Q2 and the third switching transistor Q3, and a second end thereof is commonly connected to the emitters of the second switching transistor Q2 and the third switching transistor Q3, forming a base-emitter feedback network. The core function of the fifth resistor R5 is to stabilize the static operating point of the push-pull transistor through a negative feedback mechanism. When the emitter voltage deviates due to load fluctuation or temperature drift, the fifth resistor R5 can adjust the base current in real time, suppress the conduction angle deviation of the second switching transistor Q2 and the third switching transistor Q3, reduce crossover distortion, and ensure the linearity of the output signal.

[0049] The collector of the second switching transistor Q2 is connected to the DC high-voltage power supply VCC, providing energy for forward drive. The collector of the third switching transistor Q3 is grounded, forming the reference point for the reverse drive current loop. These two transistors, through their symmetrical power supply connection, provide balanced voltage support for the complementary push-pull structure, ensuring symmetry in signal amplification between the positive and negative half-cycles, and further optimizing the dynamic response accuracy of the signal.

[0050] Furthermore, in this embodiment, the first-stage push-pull unit 20 also includes a first protection module, which includes a first diode D1 and a second diode D2, wherein the anodes of the first diode D1 and the second diode D2 are connected, the cathode of the first diode D1 is connected to the base of the second switch tube Q2, and the cathode of the second diode D2 is commonly connected to the emitters of the second switch tube Q2 and the third switch tube Q3.

[0051] From a circuit protection perspective, the first and second diodes D1 and D2 utilize reverse-blocking characteristics to clamp the base-emitter voltage. When a transient reverse overvoltage (such as a spike caused by a signal transition) occurs between the base and emitter of the second and third switching transistors Q2 and Q3, the first and second diodes D1 and D2 reversely break down and conduct, clamping the base-emitter voltage within the safe range of the diodes' forward voltage drop (approximately 0.7V). This prevents reverse breakdown of the emitter junctions of the second and third switching transistors Q2 and Q3 due to overvoltage, thereby protecting the core components of the push-pull transistors. Furthermore, the module's fast response characteristics suppress abnormal base voltage fluctuations caused by high-frequency interference, indirectly improving the push-pull circuit's anti-interference capability and ensuring stable signal amplification.

[0052] like Figure 5 As shown, in this embodiment, the second-stage push-pull unit 30 includes a fourth switch tube Q4, a fifth switch tube Q5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8 and a ninth resistor R9, the fourth switch tube Q4 is an NMOS transistor, and the fifth switch tube Q5 is a PMOS transistor.

[0053] Among them, the gates of the fourth switch tube Q4 and the fifth switch tube Q5 are connected to the output end of the first-stage push-pull unit 20 (that is, the common node of the emitters of the second switch tube Q2 and the third switch tube Q3), forming a MOS tube complementary push-pull topology to achieve high-power signal output.

[0054] The drain of the fourth switch tube Q4 is connected to the first end of the sixth resistor R6, and the second end of the sixth resistor R6 is connected to the DC high-voltage power supply VCC. The sixth resistor R6 serves as a drain current limiting resistor, which can limit the drain current of the fourth switch tube Q4 when it is turned on, thereby preventing overcurrent damage caused by sudden load changes or power supply fluctuations. The drain of the fifth switch tube Q5 is grounded through the seventh resistor R7. The seventh resistor R7 also performs a current limiting protection function, suppressing drain overcurrent when the fifth switch tube Q5 is turned on, thereby ensuring safe operation of the PMOS tube.

[0055] The source of the fourth switch tube Q4 is connected to the source of the fifth switch tube Q5 to achieve the superposition of positive and negative half-cycle power signals and improve the overall driving capability.

[0056] The first end of the eighth resistor R8 is connected to the gates of the fourth switching transistor Q4 and the fifth switching transistor Q5, and the second end of the eighth resistor R8 is connected to the sources of the fourth switching transistor Q4 and the fifth switching transistor Q5. The eighth resistor R8 is connected between the gate common terminal and the source common terminal, forming a gate-source voltage (Vgs) negative feedback network. By adjusting the gate current in real time, the conduction state of the fourth switching transistor Q4 and the fifth switching transistor Q5 is stabilized, Vgs drift caused by temperature changes or device parameter discreteness is suppressed, and the symmetry of push-pull operation is ensured.

[0057] A first end of the ninth resistor R9 is connected to the gates of the fourth switching transistor Q4 and the fifth switching transistor Q5, and a second end of the ninth resistor R9 is grounded. The ninth resistor R9 serves as a gate pull-down resistor to provide a DC bias path for the gates, thereby ensuring that the fourth switching transistor Q4 and the fifth switching transistor Q5 are reliably turned off when no input signal is present, thereby reducing static power consumption of the circuit and suppressing noise interference caused by floating gates.

[0058] Specifically, in this embodiment, the second-stage push-pull unit 30 further includes a second protection module, which includes a third diode D3 and a fourth diode D4. The anodes of the third diode D3 and the fourth diode D4 are connected, the cathode of the third diode D3 is connected to the gates of the fourth switch transistor Q4 and the fifth switch transistor Q5, and the cathode of the fourth diode D4 is connected to the sources of the fourth switch transistor Q4 and the fifth switch transistor Q5, forming a clamping protection network for the gate and source of the MOS transistor. The core function of the second protection module is that when a transient reverse overvoltage (such as a spike voltage generated by a switching action) occurs between the gate and source, the third diode D3 and the fourth diode D4 will reversely break down and conduct, clamping the gate-source voltage (Vgs) within a safe range of the diode forward conduction voltage drop (approximately 0.7V), thereby preventing damage to the gate oxide layers of the fourth switch transistor Q4 and the fifth switch transistor Q5 due to the overvoltage, thereby ensuring the operational reliability of the MOS transistor.

[0059] Furthermore, in this embodiment, the second-stage push-pull unit 30 also includes a high-frequency noise suppression module, which includes a first inductor L1 and a second inductor L2. The first end of the first inductor L1 is connected to the source of the fourth switch Q4, and the second end is connected to the first end of the second inductor L2. The second end of the second inductor L2 is connected to the source of the fifth switch Q5. The first inductor L1 and the second inductor L2 are connected in series to form a high-frequency choke network. Due to the characteristics of inductors that block high frequencies and pass low frequencies, this module can effectively suppress the high-frequency noise generated by the fourth and fifth switches Q4 and Q5 during the switching process from being transmitted to the output end, reducing high-frequency interference contamination of the signal and ensuring the spectral purity of the output signal.

[0060] Furthermore, the second-stage push-pull unit 30 also includes a low-pass filtering module, which includes a third inductor L3 and a capacitor C1 that form an LC low-pass filtering network. The first end of the third inductor L3 is connected to the source electrodes of the fourth switching transistor Q4 and the fifth switching transistor Q5, and the second end is connected to the first end of the capacitor C1. The connection point between the third inductor L3 and the capacitor C1 serves as the output terminal, outputting the final high-fidelity drive signal to the piezoelectric ceramic. This LC network attenuates high-frequency noise, smoothes the rising and falling edges of the sawtooth wave signal, further reduces output ripple, ensures the waveform integrity and high-fidelity characteristics of the drive signal, and meets the high-precision requirements of the piezoelectric ceramic for the drive signal.

[0061] Example 2:

[0062] Based on the same inventive concept as that of Example 1, the present invention further provides a nanomotor, which includes the piezoelectric ceramic drive circuit device and piezoelectric ceramic described in Example 1. The output end of the piezoelectric ceramic drive circuit device is connected to the piezoelectric ceramic for driving the piezoelectric ceramic to achieve stick-slip motion.

[0063] Furthermore, the nanomotor also includes a slider, a guide rail, and a displacement detection unit that cooperate with the piezoelectric ceramic to achieve motion. The output of the piezoelectric ceramic drive circuit device is connected to the piezoelectric ceramic electrodes via a high-frequency, low-resistance cable. This output generates a high-fidelity, high-voltage, high-slew-rate sawtooth drive signal, precisely controlling the piezoelectric ceramic to slowly extend during the sticking phase and rapidly retract during the sliding phase. Leveraging the stick-slip effect, the slider achieves nanometer-scale stepping motion along the guide rail.

[0064] The displacement detection unit includes but is not limited to a laser interferometer or a grating ruler, which collects the displacement information of the slider in real time and feeds it back to the control end of the piezoelectric ceramic drive circuit device to form a closed-loop control, further correcting the parameters of the drive signal (such as amplitude and slope) to ensure that the movement accuracy of the slider reaches the nanometer level.

[0065] This nanomotor fully utilizes the advantages of high-fidelity signal output and rapid dynamic response by integrating a high-performance piezoelectric ceramic drive circuit device. Combined with a closed-loop feedback mechanism, it effectively improves motion stability and positioning accuracy. It can be widely used in scenarios with strict requirements on motion accuracy, such as biological cell manipulation, precision instrument calibration, and micro-nano processing, and has significant technological advancement and practical value.

[0066] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A piezoelectric ceramic driving circuit device, characterized in that: It includes a signal preliminary amplification unit, a first-stage push-pull unit and a second-stage push-pull unit which are cascaded in sequence; The signal preliminary amplification unit receives an input sawtooth wave signal and dynamically adjusts the working state of the power tube based on the difference between the drain voltage of the power tube and the sawtooth wave signal, so as to achieve preliminary voltage linear amplification of the sawtooth wave signal; The first-stage push-pull unit is used to increase the driving current amplitude and slew rate of the signal after preliminary amplification; The second-stage push-pull unit is used to achieve signal power amplification and output a high-fidelity driving signal to the piezoelectric ceramic.

2. The piezoelectric ceramic driving circuit device according to claim 1, wherein: The signal preliminary amplification unit includes a first switching tube, a first resistor, a second resistor and an amplification gain adjustment module. The source of the first switching tube is grounded through the first resistor, the gate of the first switching tube receives the input sawtooth wave signal and is connected to a DC high-voltage power supply through the second resistor, and the drain of the first switching tube is connected to the input end of the first-stage push-pull unit and is connected to the DC high-voltage power supply through the amplification gain adjustment module.

3. The piezoelectric ceramic driving circuit device according to claim 2, wherein: The amplification gain adjustment module includes a third resistor and a fourth resistor, the first end of the third resistor is commonly connected to the drain of the first switching tube and the input end of the first-stage push-pull unit, the second end of the third resistor is connected to the first end of the fourth resistor, and the second end of the fourth resistor is connected to the DC high-voltage power supply.

4. The piezoelectric ceramic driving circuit device according to claim 1, wherein: The first-stage push-pull unit includes a second switching tube, a third switching tube, and a fifth resistor. The bases of the second switching tube and the third switching tube are commonly connected to the output end of the signal preliminary amplification unit, and the emitters of the second switching tube and the third switching tube are commonly connected to form a complementary push-pull structure, which is used to improve the driving current amplitude and slew rate of the output signal of the signal preliminary amplification unit and output an optimized signal. A first end of the fifth resistor is commonly connected to the bases of the second switching transistor and the third switching transistor, and a second end thereof is commonly connected to the emitters of the second switching transistor and the third switching transistor, forming a feedback path to stabilize the working state of the push-pull circuit; The collector of the second switching tube is connected to a DC high-voltage power supply, and the collector of the third switching tube is grounded.

5. The piezoelectric ceramic driving circuit device according to claim 4, wherein: The first-stage push-pull unit also includes a first protection module, which includes a first diode and a second diode. The anodes of the first diode and the second diode are connected, the cathode of the first diode is connected to the base of the second switching tube, and the cathode of the second diode is commonly connected to the emitters of the second switching tube and the third switching tube.

6. The piezoelectric ceramic driving circuit device according to claim 1, wherein: The second-stage push-pull unit includes a fourth switch tube, a fifth switch tube, a sixth resistor, a seventh resistor, an eighth resistor and a ninth resistor; The gates of the fourth switching tube and the fifth switching tube are connected to the output end of the first-stage push-pull unit, the drain of the fourth switching tube is connected to the first end of the sixth resistor, and the second end of the sixth resistor is connected to a DC high-voltage power supply; the source of the fourth switching tube is connected to the source of the fifth switching tube, and the drain of the fifth switching tube is grounded through the seventh resistor; A first end of the eighth resistor is connected to the gates of the fourth switching transistor and the fifth switching transistor, and a second end thereof is connected to the sources of the fourth switching transistor and the fifth switching transistor; A first end of the ninth resistor is connected to the gates of the fourth switching transistor and the fifth switching transistor, and a second end of the ninth resistor is grounded.

7. The piezoelectric ceramic driving circuit device according to claim 6, wherein: The second-stage push-pull unit also includes a second protection module, which includes a third diode and a fourth diode. The anodes of the third diode and the fourth diode are connected, the cathode of the third diode is connected to the gates of the fourth switch tube and the fifth switch tube, and the cathode of the fourth diode is connected to the source of the fourth switch tube and the fifth switch tube.

8. The piezoelectric ceramic driving circuit device according to claim 6, wherein: The second-stage push-pull unit also includes a high-frequency noise suppression module, which includes a first inductor and a second inductor. The first end of the first inductor is connected to the source of the fourth switching tube, and the second end of the first inductor is connected to the first end of the second inductor. The second end of the second inductor is connected to the source of the fifth switching tube.

9. The piezoelectric ceramic driving circuit device according to claim 7, wherein: The second-stage push-pull unit also includes a low-pass filtering module, which includes a third inductor and a capacitor. The first end of the third inductor is connected to the source of the fourth switching tube and the fifth switching tube, and the second end of the third inductor is connected to the first end of the capacitor. The second end of the capacitor is grounded.

10. A nanomotor, characterized in that: The device comprises the piezoelectric ceramic driving circuit device and the piezoelectric ceramic according to any one of claims 1 to 9, wherein the output end of the piezoelectric ceramic driving circuit device is connected to the piezoelectric ceramic for driving the piezoelectric ceramic to realize stick-slip motion.

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