Voltage follower drive circuit device, control method, equipment, medium and product

Abstract

The embodiment of the present invention provides a voltage-following driving circuit device, which can be applied to the field of integrated circuit technology. The voltage-following driving circuit device includes: a power module, a boost module and an output module. The power module is used to provide an input voltage to the voltage-following driving circuit device; the boost module is connected to the output end of the power module, and is used to provide a boosted electrical signal to the load according to the feedback electrical signal of the load and the input voltage; the output module is connected to the output end of the boost module, and is used to update the driving electrical signal of the load according to the feedback electrical signal of the load, the preset reference signal and the boosted electrical signal. The embodiment of the present invention also provides a control method, device, storage medium and program product for a voltage-following driving circuit device.

Description

Technical Field

[0001] The present invention relates to the field of integrated circuit technology, specifically to the field of drive circuit technology, and more specifically to a voltage follower drive circuit device, control method, equipment, medium and product. Background Art

[0002] Capacitive drive circuits usually convert the energy of input voltage and drive capacitive loads through level conversion. The driving methods of capacitive drive circuits include boost and buck, which are similar to direct current (DC) voltage converters (i.e. DC-DC converters). In addition, the control of capacitive drive circuits is also divided into open-loop control and closed-loop control: (1) Open-loop control means that in the level converter, the control of voltage and current is achieved by directly controlling the switching state of the power tube by the controller. The advantages of open-loop control are simplicity and low cost, but its disadvantages are that it cannot eliminate the influence of external disturbances and cannot achieve precise output voltage control through feedback, so it is easy to cause large fluctuations in output voltage and low accuracy. (2) Closed-loop control means that in the level converter, by monitoring and feedback of the output voltage or current, and adjusting the switching state of the power tube according to the error size, the inductor current size is adjusted, and then the output is controlled to reach the target voltage. The advantage of closed-loop control is that it can eliminate the influence of external disturbances, making the output voltage and current more stable and accurate, but due to the loop design, the system complexity is high.

[0003] The existing level conversion system has a one-stage architecture or a multi-stage architecture. The one-stage architecture is also called a single-stage structure, which means that the load is driven directly by a switching power supply. This structure will result in large output ripple and relatively high distortion. The multi-stage structure usually cascades a low dropout regulator (LDO) module after the switching power supply stage, which can convert a large voltage difference in the first stage and then convert a small voltage difference through the LDO module to greatly reduce the output ripple, enhance stability and reduce distortion. However, the existing capacitor-driven drive circuit designed based on the existing level conversion system still has the defects of complex control logic, reduced efficiency under low load due to switching frequency loss, and relatively large energy loss. Summary of the invention

[0004] In view of at least one of the technical problems existing in the above-mentioned prior art, the embodiments of the present invention provide a voltage-following drive circuit device, control method, equipment, medium and product, in order to provide an open-loop boost architecture for realizing voltage following, so as to achieve stable power supply for the output voltage of the subsequent low voltage difference linear regulator waveform, and construct a new high-efficiency, low-loss capacitive drive circuit structure.

[0005] One aspect of an embodiment of the present invention provides a voltage-following driving circuit device, which includes a power module, a boost module and an output module. The power module is used to provide an input voltage to the voltage-following driving circuit device; the boost module is connected to the output end of the power module, and is used to provide a boosted electrical signal to the load according to the feedback electrical signal of the load and the input voltage; the output module is connected to the output end of the boost module, and is used to update the driving electrical signal of the load according to the feedback electrical signal of the load, the preset reference signal and the boosted electrical signal;

[0006] Among them, the boost module includes a boost unit, wherein the boost unit includes a control switch unit, a logic control unit, a first comparison unit and a second comparison unit; the first comparison unit is used to output a first control signal to the logic control unit according to a comparison result between an incremental electrical signal corresponding to a driving electrical signal of the output module and a boost electrical signal; the second comparison unit is used to output a second control signal to the logic control unit according to a comparison result between a switch electrical signal of the control switch unit and a preset peak electrical signal; when the control switch unit is in an open circuit state, the first control signal is configured to control the logic control unit to output a first switch control signal to a gate of the control switch unit, and the first switch control signal is configured to control the control switch unit to be in a conductive state; when the control switch unit is in a conductive state, the second control signal is configured to control the logic control unit to output a second switch control signal to a gate of the control switch unit, and the second switch control signal is configured to control the control switch unit to be in an open circuit state; by controlling the conductive state and the open circuit state of the control switch unit, the boost unit provides a boost electrical signal to the load according to the feedback electrical signal and the input voltage of the load.

[0007] According to an embodiment of the present invention, the power module includes a voltage stabilizing unit, the input end of which is connected to a preset power rail of the power module, the output end of which is grounded, and the voltage stabilizing unit is used to provide voltage stabilization for the input voltage of the power module.

[0008] According to one embodiment of the present invention, the boost module further includes a charging unit, a conduction unit and a charge-discharge unit. The input end of the charging unit is connected to the preset power rail of the power module; one end of the boost unit is connected to the output end of the charging unit, and the other end of the boost unit is grounded. The boost unit is used to provide a boosted electrical signal to the load according to the feedback electrical signal of the load and the input voltage; the input end of the conduction unit is connected to the output end of the charging unit, and the output end of the conduction unit is connected to the input end of the output module; the input end of the charge-discharge unit is connected to the output end of the conduction unit, and the output end of the charge-discharge unit is grounded, and is used to output a boosted electrical signal to the output module.

[0009] According to one embodiment of the present invention, the drain of the control switch unit is connected to the output end of the charging unit, and the source of the control switch unit is grounded; the output end of the logic control unit is connected to the gate of the control switch unit, and is used to provide a switch control signal to the gate of the control switch unit according to a preset logic control rule.

[0010] According to one embodiment of the present invention, the first input terminal of the first comparison unit is connected to the incremental electrical signal corresponding to the driving electrical signal of the output module, the second input terminal of the first comparison unit is connected to the boost electrical signal of the output module, the output terminal of the first comparison unit is connected to the third input terminal of the logic control unit, and the first comparison unit is used to output a first control signal to the logic control unit according to the comparison result between the incremental electrical signal and the boost electrical signal; the fifth input terminal of the second comparison unit is connected to the switching electrical signal output by the drain of the control switch unit, the sixth input terminal of the second comparison unit is connected to the preset peak electrical signal, the output terminal of the second comparison unit is connected to the fourth input terminal of the logic control unit, and the second comparison unit is used to output a second control signal to the logic control unit according to the comparison result between the switching electrical signal and the preset peak electrical signal.

[0011] According to one embodiment of the present invention, the output module includes a voltage stabilization control unit. The voltage stabilization control unit uses the boosted electrical signal provided by the charge and discharge unit of the boost module as an input power source, the seventh input terminal of the voltage stabilization control unit is connected to the sampled electrical signal of the load, the eighth input terminal of the voltage stabilization control unit is connected to the preset reference signal, the output terminal of the voltage stabilization control unit is connected to the input terminal of the load, and the voltage stabilization control unit is used to output a driving electrical signal generated according to the comparison result of the sampled electrical signal and the preset reference signal.

[0012] According to an embodiment of the present invention, the output module further includes a digital-to-analog conversion unit and a digital signal unit. The output terminal of the digital-to-analog conversion unit is connected to the eighth input terminal of the voltage stabilization control unit, and the digital-to-analog conversion unit is used to generate a preset reference signal from the received waveform digital signal through digital-to-analog conversion; the output terminal of the digital signal unit is connected to the input terminal of the analog unit, and the digital signal unit is used to provide the waveform digital signal to the digital-to-analog conversion unit.

[0013] According to an embodiment of the present invention, the output module further comprises a signal sampling unit, one end of which is connected to the output end of the voltage stabilization control unit, and the other end of which is grounded.

[0014] According to an embodiment of the present invention, the signal sampling unit includes a first resistor and a second resistor. One end of the first resistor is connected to the output end of the voltage stabilization control unit, and the other end of the first resistor is connected to the seventh input end of the voltage stabilization control unit; one end of the second resistor is connected to the seventh input end of the voltage stabilization control unit, and the other end of the second resistor is grounded.

[0015] Another aspect of an embodiment of the present invention provides a control method for the above-mentioned voltage-following driving circuit device, which includes: controlling the power supply module to provide an input voltage to the voltage-following driving circuit device; providing a boosted electrical signal to the load according to the feedback electrical signal of the load and the input voltage through the boost module; and controlling the output module to update the driving electrical signal of the load according to the feedback electrical signal of the load, a preset reference signal and the boosted electrical signal.

[0016] Another aspect of an embodiment of the present invention provides an electronic device, including one or more processors and a memory, the memory being used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors execute the control method of the above-mentioned voltage follower drive circuit device.

[0017] Another aspect of an embodiment of the present invention provides a computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, causes the processor to execute the control method of the voltage follower drive circuit device.

[0018] Another aspect of an embodiment of the present invention provides a computer program product, including a computer program, which implements the control method of the voltage follower drive circuit device when executed by a processor.

[0019] The voltage follower driving circuit device provided in the embodiment of the present invention can at least partially solve the technical problems of complex structural design, low efficiency and high loss existing in the existing capacitive driving circuit in the related art, and thus can achieve at least one of the following technical effects:

[0020] The voltage-following driving circuit device of the embodiment of the present invention can be used as a driving chip circuit of the load, and can realize the asynchronous circuit boost (BOOST) architecture and its open-loop control logic, generate a relatively rough "following voltage rail" that is not lower than the target voltage, and realize the function of the LDO (low-dropout linear regulator) module under the "following voltage rail". The LDO module can be controlled by the digital circuit to charge and discharge the capacitive load and realize an arbitrary voltage waveform at both ends of the capacitor. Moreover, in the process of outputting an arbitrary waveform, the LDO module's supply voltage (i.e., the output voltage of the boost module) changes synchronously with the waveform to maintain a continuous and relatively small voltage difference (i.e., dropout), thereby significantly improving the energy transmission efficiency. Therefore, the embodiment of the present invention proposes an open-loop boost (Boost) architecture that can realize voltage following, which is used to supply power to the subsequent LDO module for the output voltage of an arbitrary waveform, and realize a new structure of a high-efficiency, low-loss capacitive driving circuit.

[0021] Specifically, compared with the two-stage method using the traditional capacitive drive circuit, the voltage follower drive circuit device of the embodiment of the present invention has a simpler and more direct control logic in terms of technical implementation, and has higher efficiency in the application of small capacitors. It can be seen that the voltage follower drive circuit device of the embodiment of the present invention can be applied to the field of large-scale digital-analog hybrid integrated circuit chips and power management chips, and can be mainly used for various applications that need to drive high-voltage capacitive loads, such as piezoelectric ceramic drive, audio drive, vibration motor, ignition controller, etc., and has extremely high commercial application value and scientific research value.

[0022] It should be understood that the above general description and the following detailed description are merely exemplary and illustrative and are not intended to limit the scope of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above contents and other objects, features and advantages of the present invention will become more apparent through the following description of the embodiments of the present invention with reference to the accompanying drawings, in which:

[0024] Figure 1 The circuit composition diagram of the capacitive driver in the prior art is schematically shown;

[0025] Figure 2 The schematic diagram shows Figure 1 The output voltage waveform diagram of the capacitor type driver in the prior art is shown;

[0026] Figure 3 A circuit diagram schematically shows a voltage follower type driving circuit device according to an embodiment of the present invention;

[0027] Figure 4 The output voltage waveform diagram of the voltage follower type driving circuit device according to the embodiment of the present invention is schematically shown;

[0028] Figure 5A A flow chart schematically shows a control method of a voltage follower type driving circuit device according to an embodiment of the present invention;

[0029] Figure 5B A schematic diagram showing an application scenario of a voltage follower drive circuit device, a control method, a device, a medium and a program product according to an embodiment of the present invention; and

[0030] Figure 6 A block diagram of an electronic device suitable for implementing a voltage follower type driving circuit device according to an embodiment of the present invention is schematically shown.

[0031] The above-mentioned drawings are part of the specification of the embodiments of the present invention, which illustrate exemplary embodiments of the present invention. The attached drawings and the description of the specification are used together to illustrate the principles of the embodiments of the present invention. It should be understood that the above general description of the drawings and the following specific implementations are only exemplary and illustrative, and they cannot limit the scope of the present invention. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the embodiments of the present invention more clearly understood, the spirit of the contents disclosed by the present invention will be clearly explained with the accompanying drawings and detailed descriptions below. After understanding the embodiments of the contents of the present invention, any technician in the relevant technical field can change and modify the techniques taught by the contents of the present invention without departing from the spirit and scope of the contents of the present invention.

[0033] The exemplary embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. In addition, elements / components with the same or similar reference numerals used in the drawings and embodiments are used to represent the same or similar parts.

[0034] The terms “first”, “second”, etc. used in the present invention do not particularly refer to an order or sequence, nor are they used to limit the present invention. They are only used to distinguish elements or operations described with the same technical terms.

[0035] The directional terms used in the present invention, such as up, down, left, right, front or back, etc., are only used to refer to the directions of the drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention.

[0036] The words “include,” “including,” “have,” “contain,” etc. used in the present invention are open-ended terms, meaning including but not limited to.

[0037] The term "and / or" used in the present invention includes any or all combinations of the items mentioned.

[0038] Regarding the present invention, "plurality" includes "two" and "more than two"; regarding the present invention, "plurality of groups" includes "two groups" and "more than two groups".

[0039] The terms "substantially" and "approximately" used in the present invention are used to modify any quantity or error that may vary slightly, but these slight changes or errors do not change their essence. Generally speaking, the range of slight changes or errors modified by such terms may be 20% in some embodiments, 10% in some embodiments, 5% in some embodiments, or other values. Those skilled in the art should understand that the aforementioned values ​​can be adjusted according to actual needs and are not limited thereto.

[0040] All terms (including technical and scientific terms) used herein have the meanings commonly understood by those skilled in the art unless otherwise defined. It should be noted that the terms used herein should be interpreted as having a meaning consistent with the context of this specification and should not be interpreted in an idealized or overly rigid manner.

[0041] In the case of using expressions such as "at least one of A, B, and C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, and C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or a system having A, B, C, etc.). In the case of using expressions such as "at least one of A, B, or C, etc.", it should generally be interpreted in accordance with the meaning of the expression generally understood by those skilled in the art (for example, "a system having at least one of A, B, or C" should include but not be limited to a system having A alone, B alone, C alone, A and B, A and C, B and C, and / or a system having A, B, C, etc.). Those skilled in the art should also understand that any transitional conjunctions and / or phrases that substantially represent two or more optional items, whether in the specification, claims, or drawings, should be understood to give the possibility of including one of these items, either of these items, or both of these items. For example, the phrase "A or B" should be understood to include the possibilities of "A" or "B", or "A and B".

[0042] In high-efficiency, low-power electronic devices, different loads require different driving methods and performance. Piezoelectric ceramic drivers, which are widely used in force generating devices, robots, impact motors, optical scanning and other fields, have requirements such as high resolution, fast response, and large thrust. Piezoelectric tactile drivers used in mobile phones, tablets, portable computers, keyboards and mice, and touch-enabled devices need to be compatible with both low input voltage and high output voltage capabilities, and have fast tactile response time and other requirements. Audio drivers need to have power amplifier circuits with low electromagnetic interference (EMI) and high linearity within the full bandwidth.

[0043] Among them, the existing piezoelectric driver solution can be composed of two parts: a boost level conversion stage and a linear regulator stage. Among them, the energy of the boost level conversion stage is transferred from the input to the output, the inductor and the synchronous power switch work in the boost mode, and the output voltage rises to a certain set value; the output voltage is controlled in a closed loop, the output voltage is fed back and the working state of the switch tube is adjusted accordingly. The specific working steps of the boost level conversion stage are as follows: sampling the output voltage and comparing it with the reference voltage, adjusting the inductor peak current according to the comparison result, so that the output voltage approaches the given reference voltage, and the output voltage is stabilized at the set value through continuous sampling and adjustment. However, due to bandwidth limitations, this closed-loop control method has a slow response to input voltage and load changes, and it is necessary to design a zero-pole distribution and a compensation network to stabilize the system. In addition, when the switch duty cycle is greater than 50%, a slope compensation circuit is required to avoid subharmonic oscillations. Correspondingly, the linear regulator stage can modulate the output voltage of the boost module (Boost), and under the control of the low dropout regulator (LDO) loop, output an arbitrary waveform set by the digital circuit.

[0044] Specifically, if Figure 1 The circuit 100 of the capacitive driver in the prior art is shown, where L1 is an inductor, Q1 is a power tube, D1 is a freewheeling diode, EA is an error amplifier (EA), and a PWM control module with a pulse width modulation (PWM) logic together constitute a boost circuit. The output voltage HV of the boost circuit is used as the input voltage of the next-stage output logic control module 101, and after being processed by the LDO of the output logic control module 101, it is modulated into an arbitrary controlled waveform OUT and applied to the capacitive load Piezo.

[0045] Regarding the above Figure 1 The existing capacitive driver shown has the following obvious shortcomings:

[0046] (1) The closed-loop control loop is placed in the boost circuit. Since the range of the output load Piezo capacitor is large and the output voltage OUT range is wide, the control logic is relatively complex. Customers are required to set PID (Proportional, Integral, Derivative) parameters or perform loop compensation to achieve the best configuration, which is not conducive to customer application expansion.

[0047] (2) The loop control adopts the peak current control mode, and the output voltage and inductor current are fed back at the same time, forming a voltage outer loop and a current inner loop dual feedback. However, the switching frequency and peak current cannot change adaptively with the load voltage size and load voltage slope, resulting in switching frequency loss and reduced efficiency under low load;

[0048] (3) The LDO of the output logic control module 101 can modulate the HV voltage. Since the output arbitrary waveform range is large, the voltage dropout on the LDO will change with the output, such as Figure 2 As shown, taking the output sine wave as an example, the energy loss caused by the pressure difference (dropout) accounts for a relatively large proportion of the total loss.

[0049] Therefore, the traditional capacitor-type drive circuit architecture uses a closed-loop method to achieve the first-stage boost, which has complex control logic and low efficiency when using a small output capacitor. Moreover, in the traditional architecture, the second-stage LDO module works under a large voltage difference (dropout) condition, which has high power consumption and low efficiency.

[0050] In view of at least one of the technical problems existing in the above-mentioned prior art, the embodiments of the present invention provide a voltage-following drive circuit device, control method, equipment, medium and product, in order to provide an open-loop boost architecture for realizing voltage following, so as to achieve stable power supply for the output voltage of the subsequent low voltage difference linear regulator waveform, and construct a new high-efficiency, low-loss capacitive drive circuit structure.

[0051] The following will be based on Figure 1 The technical problems of the existing capacitive driver are solved by Figure 3~Figure 6 A voltage follower type driving circuit device according to the disclosed embodiment is described in detail.

[0052] like Figure 3-Figure 6 As shown, one aspect of an embodiment of the present invention provides a voltage follower type driving circuit device 300 , which includes a power supply module 301 , a boost module 302 and an output module 303 .

[0053] The power module 301 is used to provide an input voltage V to the voltage follower type driving circuit device 300. IN ;

[0054] The boost module 302 is connected to the output end of the power module 301 and is used to generate a voltage according to the feedback electrical signal of the load P (such as a piezoelectric sensor Piezo) and the input voltage V IN Provide a boosted electrical signal V to the load P HV ;

[0055] The output module 303 is connected to the output end of the boost module 302 and is used to generate a voltage boost signal V according to the feedback signal of the load P, the preset reference signal and the boost signal V HV Update the driving electrical signal V of the load P OUT .

[0056] The power module 301 can provide a preset power rail to the voltage follower type driving circuit device 300 of the embodiment of the present invention, and the preset power rail can be used to provide an input voltage V IN , input voltage V IN It can be equivalent to the power supply voltage of the entire driving circuit device 300.

[0057] The input end of the boost module 302 can be connected to the output end of the power module 301. The boost module 302 can be used as a boost logic control module (i.e., a Boost module) to perform a boost operation according to the load demand of the output module 303. The feedback electrical signal can be a detection signal for the load voltage on the load P. When the input voltage V IN When applied to the boost module 302, the boost module 302 performs a voltage boost process on the voltage signal according to the feedback electrical signal to generate a boost electrical signal V HV Among them, the boost signal V HV Can be applied to the output module 303.

[0058] The boost signal V can be realized by feedback signal HV The control enables the boost module 302 to output the boosted electrical signal V according to the detection electrical signal on the load P. HV For more precise control, for example, in the boost signal V HV When the energy is insufficient, the boost module 302 can be used to replenish the energy in time.

[0059] The input end of the output module 303 is connected to the output end of the boost module 302, and can receive the boost electrical signal V HV As a driving signal of the output module 303. The preset reference signal can be a reference signal generated according to the target driving signal of the load P, which can be used as the driving electrical signal V OUT The target driving signal may be an optimal driving electrical signal for the load P, which can ensure that the load P operates in an optimal state. The driving electrical signal V OUT It can be the actual load electrical signal of the load P.

[0060] Since the boost module 302 and the output module 303 can each perform their own voltage output control according to the feedback electrical signal, the driving electrical signal V finally applied to the load P is OUTIt can be continuously updated and adjusted, and finally stabilized within an optimal threshold range to meet the actual optimal operating state of the load P, so as to be closer to the ideal operating state corresponding to the preset reference signal. Among them, the feedback electrical signal can be the real-time driving electrical signal V of the load P corresponding to a certain moment on the load P. OUT .

[0061] By controlling the on-state and open-circuit state of the control switch unit M0 of the boost module 302, the boost unit of the boost module 302 is controlled according to the feedback electrical signal of the load P and the input voltage V IN Provide a boosted electrical signal V to the load P HV , can be combined with Figure 3 Reference is made to the description of the boost module 302 below.

[0062] Therefore, the voltage follower driving circuit device 300 of the embodiment of the present invention can directly compare the output voltage with the target voltage, and then control the boost module 302 to provide the boost electrical signal V to the output module 303. HV , the boosted electrical signal V HV It can be a relatively rough following voltage that is not lower than the target driving signal, and the output module 303 can be based on the boosted electrical signal V HV Realize the driving electrical signal V OUT In this way, a drive control architecture with simpler and more direct control logic can be built, which can effectively ensure the stability of the circuit system. In the small load capacitance mode, the simple control method makes the efficiency higher. In addition, the drive control architecture can realize the timely regulation of arbitrary waveform output, which can further realize the expansion of waveform output.

[0063] In addition, the output module 303 can output the following voltage after the boost (boost electrical signal V HV ) is output after level conversion, so that the output ripple is well suppressed, the output signal distortion is lower, and the linearity is higher. Moreover, the follower voltage can change with the driving electrical signal output by the output module 303, and maintain a state that is always slightly higher than the output voltage, so that the voltage difference (Dropout) on the output module 303 can be greatly reduced, so as to achieve a significant improvement in the driving efficiency of the overall driving circuit device.

[0064] like Figure 3-Figure 6 As shown, according to an embodiment of the present invention, the power module 301 includes a voltage stabilizing unit C VIN .

[0065] Voltage stabilizing unit C VIN The input end of the voltage regulator unit C is connected to the preset power rail of the power module 301. VIN The output terminal is grounded to GND, and the voltage regulator unit CVIN It is used to provide voltage stabilization for the input voltage of the power module 303. The preset power rail of the power module 301 may be a line for transmitting power, which is usually dedicated to powering the circuit module.

[0066] With the help of the voltage stabilizing unit C VIN It can usually be a circuit unit composed of one or more capacitor elements, which can use the principle of capacitor charging and discharging to generate a voltage V at the input of the preset power rail. IN When the signal fluctuates, it will affect the input voltage V IN The signal stabilization effect avoids the input voltage V IN The fluctuation interference has a negative impact on the subsequent boost module 302 and the output module 303.

[0067] like Figure 3-Figure 6 As shown, according to one embodiment of the present invention, the boost module 302 includes a charging unit L0, a boost unit, a conduction unit D0 and a charge-discharge unit C HV .

[0068] The input end of the charging unit L0 is connected to the preset power rail of the power module 301. The charging unit L0 can be one or more inductors that can meet the input voltage V IN Complete your own charging.

[0069] One end of the boost unit is connected to the output end of the charging unit L0, and the other end of the boost unit is grounded GND. The boost unit is used to generate a voltage according to the feedback electrical signal of the load P and the input voltage V IN Provide a boosted electrical signal V to the load P HV .

[0070] The input end of the conduction unit D0 is connected to the output end of the charging unit L0, and the output end of the conduction unit D0 is connected to the input end of the output module 303. The conduction unit D0 can satisfy the unidirectional current conduction function of the boost unit to the output module 303 side, and can specifically be one or more unidirectional conducting diode elements.

[0071] Charging and discharging unit C HV The input end of the conduction unit D0 is connected to the output end of the charge and discharge unit C HV The output end of the ground GND is used to output a boosted electrical signal V to the output module 303. HV Among them, the charging and discharging unit C HV Specifically, it may be one or more capacitive elements.

[0072] Specifically, when in the charging state, the boost unit of the boost module 302 can control itself to be grounded and turned on according to the feedback electrical signal, so that the charging unit L0 is connected to the input voltage V applied by the power module 301. IN Recharge.

[0073] When in the boost state, the boost unit of the boost module 302 can realize its own ground disconnection. At this time, the charging unit L0 will pass the conducting unit D0 to the charging and discharging unit C HV Perform unidirectional charging so that the charging and discharging unit C HV At this time, when the boost unit controls itself to be grounded and turned on again according to the feedback electrical signal, the charging and discharging unit C HV Then, the output module 303 can be provided with a boosted electrical signal V through a gradual discharge process. HV .

[0074] Therefore, the boost module 302 can realize the boost function for the output module 303, and the charge and discharge unit C can be realized by controlling the disconnection or conduction state of the boost unit. HV The output module is charged and discharged to provide a boosted electrical signal V HV As the load P, the two ends drive the electrical signal V OUT Therefore, the system stability can be maintained at all times, making the control logic simpler and more direct, and the control efficiency higher.

[0075] like Figure 3-Figure 6 As shown, according to an embodiment of the present invention, the boost unit includes a control switch unit and a logic control unit.

[0076] The drain of the control switch unit M0 is connected to the output end of the charging unit L0, and the source of the control switch unit M0 is grounded GND; the control switch unit M0 may specifically be one or more power transistors, and the power transistor may specifically be a power metal oxide semiconductor field effect transistor (Power Metal Oxide Semiconductor Field Effect Transistor, referred to as power field effect transistor, i.e., Power-MOSFET).

[0077] The output terminal of the logic control unit 321 is connected to the gate of the control switch unit M0, and is used to provide a switch control signal to the gate of the control switch unit M0 according to a preset logic control rule. The logic control unit 321 can be a circuit control module composed of a logic control circuit, which can output a corresponding switch control signal according to a preset logic control rule. When the switch control signal is applied to the gate of the control switch unit M0, it can be used as a control signal for turning on or off the control switch unit M0. Therefore, the switch control signal, as the gate-source voltage of the control switch unit M0, can control the turning on and off of the control switch unit M0 under different high and low level conditions.

[0078] The preset logic control rule may be predefined information for controlling the output switch control signal. For example, in the charging state, the logic control unit 321 may output a high-level switch control signal to the gate of the control switch unit M0 according to a specific first logic control signal, and control the control switch unit M0 to be turned on, and the boost unit is in a grounded conduction state. Correspondingly, in the boost state, the logic control unit 321 may output a low-level switch control signal to the gate of the control switch unit M0 according to a specific second logic control signal, and control the control switch unit M0 to be turned off, and the boost unit is in a disconnected state. Among them, the first logic control signal and the second logic control signal may be specifically generated by processing according to the feedback electrical signal, and may be specifically generated by processing by the logic control unit 321 or only received in a targeted manner.

[0079] In this way, the boosting process of the boosting unit of the boosting module 302 can be accurately controlled to ensure that the boosting electrical signal V applied to the output module 301 is HV stability.

[0080] like Figure 3-Figure 6 As shown, according to an embodiment of the present invention, the boost unit further includes a first comparison unit CMP1 and a second comparison unit CMP2. The first comparison unit CMP1 and the second comparison unit CMP2 can be comparator (CMP) circuit elements of the same or different configurations.

[0081] The first input terminal of the first comparison unit CMP1 is connected to the driving electrical signal V of the output module 302. OUT The second input terminal of the first comparison unit CMP1 is connected to the boosted electrical signal V of the output module 303. HV The output terminal of the first comparison unit CMP1 is connected to the third input terminal of the logic control unit 321. The first comparison unit CMP1 is used to compare the incremental electrical signal and the boost electrical signal V HV The comparison result between them outputs a first control signal to the logic control unit 321.

[0082] Incremental electrical signal V Δ Can be the driving electrical signal V OUT Specifically, the two satisfy the following relationship: V Δ =V OUT +ΔV. ΔV is an incremental signal value relative to the driving electrical signal, for example, ΔV=2V can be satisfied, and can be specifically defined according to the actual requirements of the load P (such as the target driving signal). The feedback electrical signal can be the driving electrical signal V of the load P obtained by real-time detection. OUT , which can be obtained through voltage detection technology. The driving electrical signal V OUTThe conversion to incremental electrical signals can be achieved through voltage conversion technology, which will not be described in detail.

[0083] Incremental electrical signal and boosted electrical signal V HV After being electrically converted (such as converted into current signals), they can be used as two differential input signals of the first comparison unit CMP1. The first comparison unit CMP1 can control the output of the first control signal to the logic control unit 321 according to the comparison result of the two. For example, when the boosted electrical signal V HV Satisfaction: V HV < V Δ When the first comparison unit CMP1 can output the first control signal to the logic control unit 321, the logic control unit 321 can apply a switch control signal (such as a high level signal) to the gate of the control switch unit M0 according to the first control signal and the preset logic control rule, so that the control switch unit M0 is turned on, thereby making the boost unit enter the charging state and charging the charging unit L0.

[0084] The second comparison unit CMP2, the fifth input terminal of the second comparison unit CMP2 is connected to the switch electrical signal output by the drain of the control switch unit M0, and the sixth input terminal of the second comparison unit CMP2 is connected to the preset peak electrical signal I ZTC The output terminal of the second comparison unit CMP2 is connected to the fourth input terminal of the logic control unit 321. The second comparison unit CMP2 is used to compare the switching electrical signal and the preset peak electrical signal I ZTC The comparison result between them is used to output a second control signal to the logic control unit.

[0085] The switch electrical signal may be a current signal of the control switch unit M0, and may be used to provide feedback on the current of the charging unit L0 when the boost unit is in the on state. When the control switch unit M0 changes from the off state to the on state, the switch electrical signal may be significantly increased, or when the control switch unit M0 changes from the on state to the off state, the switch electrical signal may be significantly decreased. This may reflect the on-off state of the control switch unit M0.

[0086] Preset peak electrical signal I ZTC The preset peak electrical signal and the switch electrical signal can be used as two differential input signals of the second comparison unit CMP2, respectively. The second comparison unit CMP2 can control the output of the second control signal to the logic control unit 321 according to the comparison result of the two. For example, when the switch electrical signal increases to the preset peak electrical signal I ZTCAt the same time, the second comparison unit CMP2 can output a second control signal to the logic control unit 321, and the logic control unit 321 can apply a switch control signal (such as a low level signal) to the gate of the control switch unit M0 according to the second control signal and the preset logic control rule, so that the control switch unit M0 is disconnected, so that the boost unit enters the boost state, and the charge and discharge unit C HV The charging and discharging unit C HV The output module 303 can then be provided with a boosted electrical signal V by a gradual discharge process. HV .

[0087] It should be noted that, in the embodiment of the present invention, the first control signal may be the above-mentioned first logic control signal, and the second control signal may be the above-mentioned second logic control signal.

[0088] Therefore, by using the boost module 302 (ie, BOOST module), a voltage higher than the highest driving electrical signal V can be output through the comparison logic control of the open-loop architecture. OUT A relatively rough follower voltage higher by ΔV (such as 2V) is used as the boost signal V HV .

[0089] like Figure 3-Figure 6 As shown, according to an embodiment of the present invention, when the control switch unit M0 is in an open state, the first control signal is configured to control the logic control unit 321 to output the first switch control signal to the gate of the control switch unit M0, and the first switch control signal is configured to control the control switch unit M0 to be in a conductive state;

[0090] When the control switch unit M0 is in the on state, the second control signal is configured to control the logic control unit 321 to output the second switch control signal to the gate of the control switch unit M0, and the second switch control signal is configured to control the control switch unit M0 to be in the open state.

[0091] The switch control signal may include a first switch control signal (eg, a high level signal) and a second switch control signal (eg, a low level signal).

[0092] When the first comparison unit CMP1 can output the first control signal to the logic control unit 321 according to the incremental electrical signal and the boost electrical signal, the logic control unit 321 can control the switch unit M0 to be in the on state. At this time, the charging unit L0 is at the input voltage V IN Charging under the action of.

[0093] During the charging process of the charging unit L0, the second comparison unit CMP2 outputs the second control signal to the logic control unit 321 according to the real-time detected switch electrical signal of the control switch unit M0 and the preset peak electrical signal. The logic control unit 321 can make the control switch unit M0 in the disconnected state. At this time, the charging unit L0 transmits the second control signal to the charging and discharging unit C0 through the conducting unit D0. HV When the control switch unit M0 is in the off state again, the charging and discharging unit C HV The output module can be gradually discharged to provide a boosted electrical signal V HV .

[0094] In this way, a boost control circuit architecture with simpler and more direct control logic can be constructed to achieve precise control of the boost process, and at the same time, the boost electric signal V can be achieved according to the electric signal of the load P detected in real time. HV Timely and accurate updates can significantly improve circuit stability, ensure higher control efficiency, and enable timely regulation of arbitrary waveforms.

[0095] It can be seen that the output voltage of the boost module 302 (ie, the boosted electrical signal V HV ) and the feedback electrical signal of the load P (i.e. the driving electrical signal V OUT ) is compared, when the boost voltage signal V HV When the voltage of the boost signal is insufficient, the boost signal can be controlled to be turned on to supplement the energy. The voltage value of the boost signal can be roughly maintained at a level that is approximately at least one incremental signal value ΔV higher than the driving signal.

[0096] like Figure 3-Figure 6 As shown, according to an embodiment of the present invention, the output module 303 includes a voltage regulation control unit LDO.

[0097] The voltage stabilization control unit LDO is based on the charging and discharging unit C of the boost module 302. HV Provides a boost signal V HV As the input power supply, the seventh input terminal of the voltage stabilization control unit LDO is connected to the sampled electrical signal of the load P, the eighth input terminal of the voltage stabilization control unit LDO is connected to the preset reference signal, the output terminal of the voltage stabilization control unit LDO is connected to the input terminal of the load P, and the voltage stabilization control unit LDO is used to output a driving electrical signal V generated according to the comparison result of the sampled electrical signal and the preset reference signal OUT .

[0098] The voltage stabilization control unit LDO may be a low-dropout linear regulator (LDO for short). The voltage stabilization control unit LDO may use the output end of the boost module 302 as a power rail and output the boosted electrical signal V HV As a power supply electrical signal.

[0099] Similar to the feedback electrical signal as the real-time detection electrical signal of the load P, the sampled electrical signal can also be used to reflect the real-time detection electrical signal of the load P. Unless in special circumstances, the sampled electrical signal can usually maintain a difference with the feedback electrical signal at least in amplitude. The preset reference signal can be a reference signal for the sampled electrical signal. Specifically, the voltage regulation control unit LDO can use the voltage difference between the sampled electrical signal and the preset reference signal as a comparison result, and according to the boosted electrical signal V as the power supply electrical signal of the output module 303 HV The driving signal V on the load P OUT The driving electrical signal V OUT It is the output signal after being amplified by the voltage regulation control unit LDO.

[0100] Since the boosted electrical signal as the power signal of the output module 303 is precisely controlled by the boost module 302, the boosted electrical signal V HV Able to accurately follow the driving electrical signal V of the load P OUT , ensuring that the voltage drop (Dropout) of the voltage stabilizing control unit LDO as the second stage can be minimized. Therefore, the energy loss of the voltage stabilizing control unit LDO is significantly reduced, the power consumption of the entire circuit is significantly reduced, and the circuit efficiency is significantly improved.

[0101] like Figure 3-Figure 6 As shown, according to an embodiment of the present invention, the output module 303 further includes a digital-to-analog conversion unit DAC and a digital signal unit 331 .

[0102] The output end of the digital-to-analog conversion unit DAC is connected to the eighth input end of the voltage stabilization control unit LDO, and the digital-to-analog conversion unit DAC is used to generate a preset reference signal from the received waveform digital signal through digital-to-analog conversion;

[0103] The output end of the digital signal unit 331 is connected to the input end of the digital-to-analog conversion unit DAC, and the digital signal unit is used to provide a waveform digital signal to the digital-to-analog conversion unit DAC.

[0104] As a component of the output module, the digital signal unit 331 can receive the digital signal of the output voltage polarity and amplitude as a waveform digital signal through the I / O port, and transmit the waveform digital signal to the digital-to-analog conversion unit DAC. The digital-to-analog conversion unit DAC can generate a voltage signal containing amplitude information as a reference voltage of the voltage regulation control unit LDO (such as Figure 3 The digital-to-analog conversion unit DAC may be a digital-to-analog converter (DAC for short), which will not be described in detail.

[0105] like Figure 3-Figure 6As shown, according to an embodiment of the present invention, the output module 303 further includes a signal sampling unit.

[0106] One end of the signal sampling unit is connected to the output end of the voltage stabilization control unit LDO, and the other end of the signal sampling unit is grounded GND.

[0107] like Figure 3-Figure 6 As shown, according to an embodiment of the present invention, the signal sampling unit includes a first resistor R 3 and the second resistor R 4 .

[0108] The first resistor R 3 One end of the first resistor R 3 The other end is connected to the seventh input end of the voltage stabilization control unit LDO;

[0109] The second resistor R 4 One end of the second resistor R 4 The other end is grounded GND.

[0110] Through the first resistor R 3 and the second resistor R 4 The signal sampling unit can make the voltage stabilizing control unit LDO, in the process of acquiring the sampled electrical signal, make the sampled electrical signal only equal to a signal value of a fixed proportion of the driving electrical signal of the load P, thereby truly reflecting the driving electrical signal while ensuring the normal operation of the voltage stabilizing control unit LDO.

[0111] Thus, the boosted electrical signal V HV Under this function, precise output control of the voltage stabilization control unit LDO (low dropout linear regulator) can be achieved, and loads such as capacitors can be driven to output precise voltage.

[0112] Based on the detailed description of the voltage follower type driving circuit device of the embodiment of the present invention, it can be seen that the output control process of the driving waveform of the driving circuit device is mainly as follows:

[0113] like Figure 3 As shown, the boost module 302 (BOOST module) converts the input voltage V IN turns to a level higher than the driving signal V OUT The rough voltage (i.e. the incremental electrical signal V OUT +2V), which will boost the voltage signal V HV And the incremental electrical signal V OUT +2V serves as two differential inputs of the first comparison unit CMP1.

[0114] When the boost signal V HV ﹤Incremental electrical signal VOUT +2V, the first comparison unit CMP1 outputs a signal NEEDSWON set to 1 as the first control signal, and the logic control unit 321 inputs a first switch control signal to the control switch unit M0 according to the first control signal, which can turn on the control switch unit M0. At this time, the control switch unit M0 enters a conductive state. At this time, the input voltage V IN The charging unit L0 is charged.

[0115] When the control switch unit M0 enters the on state to charge the energy unit L0, the second comparison unit CMP2 starts to work. When the current of the energy unit L0 (i.e., the switch electrical signal of the control switch unit (M0)) rises to the preset peak current threshold value I ZTC (i.e., the preset peak electrical signal), the second current comparison unit CMP2 output signal CLIM is set to 1 as the second control signal, and the logic control unit 321 inputs the second switch control signal that can turn off the control switch unit M0 to the control switch unit M0 according to the second control signal. At this time, the control switch unit M0 enters a disconnected open circuit state, and the charging unit L0 starts to discharge through the conduction unit D0.

[0116] Among them, through the discharge process of the charging unit L0, energy can be replenished to the charging and discharging unit C HV Therefore, the boosted electrical signal V as the power rail of the output module 303 is HV Can be roughly maintained at a ratio of the driving electrical signal V OUT A level of about 2V higher.

[0117] Furthermore, after the output module 303 is supplemented with energy by the boost module 302, the boosted electrical signal V HV Under the power rail, the output module 303 can charge and discharge the load P (such as a PIEZO capacitor) to achieve arbitrary waveform (including sine wave) output.

[0118] For example Figure 3 The logic control unit 321 shown in the figure has the main function of judging the on / off state of the control switch unit M0 through a series of logical operations of signals, and controlling the switching of the boost module 302 between the continuous conduction mode (CCM) and the discontinuous conduction mode (DCM). The internal logic effects of the logic control unit 321 can be mainly divided into the following three parts:

[0119] Part 1: When the boost signal V HV The input voltage reaches the threshold value of the incremental electrical signal (V OUT+2V), the control switch unit M0 is turned on; when the boost signal V HV The input voltage exceeds the threshold value of the incremental electrical signal (V OUT +2V), the control switch unit M0 is controlled to be disconnected.

[0120] In the second part, the minimum off-time or maximum on-time of the control switch unit M0 involved in the boost unit can be controlled by adjusting the inverter with added delay so that all logics operate reasonably. For example, when the off-time of the control switch unit M0 reaches the set minimum off-time, the control switch unit M0 is turned on; when the off-time of the control switch unit M0 reaches the set maximum on-time, the control switch unit M0 is turned off.

[0121] Part 3: When in the discontinuous conduction mode (DCM mode), whenever the minimum off-time of the control switch unit M0 is reached, the first control signal (NEEDSWON signal) output by the first comparison unit PM1 is detected to be high. If it is high (even if it is currently working in the DCM state, the on-time of the control switch unit M0 is not enough to make the proportional to the incremental electrical signal V OUT +2V corresponding current I reaches the set peak current), that is, enters CCM state. When in continuous conduction mode (CCM mode), each time the fixed off-time in CCM state is reached, that is, the rising edge of TIME_OPEN, the first control signal (NEEDSWON signal) output by the first comparison unit PM1 is detected to be low. If it is low, it means that the on-time of the control switch unit M0 is sufficient to make the on-time proportional to the incremental electrical signal V OUT The current I corresponding to +2V reaches the set peak current, so there is no need to work in CCM mode, and then exits the CCM state and enters the DCM state.

[0122] Therefore, if Figure 4 As shown, the voltage follower type driving circuit device of the embodiment of the present invention can realize the boosting of the voltage signal V during the load driving process. HV Accurately follow the load drive electrical signal V OUT The pressure difference (Dropout) between the two is smaller, and at least the following technical effects can be achieved:

[0123] (1) First, open-loop control is used to realize the boost function of the boost module 302, and the boost output voltage signal V HV Directly with the target drive electrical signal V OUTComparison is made, and then the on and off of the control switch unit is controlled to obtain a relatively rough follower voltage that is not lower than the target drive signal, and the precise control of the final output voltage is placed in the voltage regulator control unit LDO of the subsequent stage. This circuit architecture makes the control logic simpler and more direct, and always maintains the stability of the system. In the small load capacitance mode, the simple control method makes the efficiency higher. And this control architecture can timely regulate and expand the required output arbitrary waveform.

[0124] (2) In addition, it can adaptively and flexibly switch between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) according to load requirements (such as load capacitance). When driving heavy load, it automatically enters the discontinuous conduction mode (DCM) working mode, and when driving light load, it enters the continuous conduction mode (CCM), which greatly improves the efficiency of the circuit, and the switching process is smooth without dead ends, and the output waveform accuracy is not affected;

[0125] (3) Moreover, the input voltage of the voltage regulator control unit LDO is controlled to follow the dynamic change of the output voltage, so that the voltage regulator control unit LDO operates under a lower voltage difference (dropout) condition, thereby significantly reducing the energy loss in the voltage regulator control unit LDO.

[0126] Therefore, compared with the traditional two-level architecture with complex control logic and low efficiency, the above-mentioned voltage follower driving circuit device in the embodiment of the present invention is a driving architecture with simpler structural design and more direct control logic, which can have higher driving efficiency for small capacitor applications.

[0127] Based on the voltage follower type driving circuit device of the above embodiment of the present invention, the embodiment of the present invention further provides a control method of the voltage follower type driving circuit device. Figure 5A-Figure 6 The control method is described in detail.

[0128] like Figure 5A As shown, another aspect of the embodiment of the present invention provides a control method of the voltage follower type driving circuit device 300, which includes operations S501 to S503.

[0129] In operation S501, the control power module 301 provides an input voltage V to the voltage follower type driving circuit device 300. IN ;

[0130] In operation S502, the boost module 302 generates a voltage according to the feedback electrical signal of the load and the input voltage V IN Provide a boosted voltage signal V to the load HV;as well as

[0131] In operation S503, the control output module 303 controls the output voltage of the load according to the feedback electric signal, the preset reference signal and the boost electric signal V HV Update the load drive signal V OUT .

[0132] In order to enable those skilled in the art to have a clearer understanding of the control method of the voltage follower type driving circuit device according to the embodiment of the present invention, further combined with the following Figure 3 The specific implementation examples shown are provided in detail below.

[0133] The boost module 302 (ie, BOOST module) is used to increase the input voltage V IN turns to a level higher than the driving signal V OUT The rough voltage is used as the boost signal V HV , which will boost the voltage signal V HV and incremental electrical signal (V OUT + 2V) as the two differential inputs of the first comparator CMP1. HV ﹤Incremental electrical signal V OUT +2, the first comparator CMP1 outputs a signal NEEDSWON which is set to 1 as the first control signal. After a series of logic control processes by the logic control unit 321, the power tube M0 can be turned on (conducted) to charge the inductor L0.

[0134] At this time, the second comparator CMP2 starts to work. When the inductor current (switching electrical signal) detected by it rises to the preset peak current threshold I ZTC When the second comparator CMP2 outputs a signal CLIM set to 1 as the second control signal, and controls the power tube M0 to be turned off (disconnected). The current of the inductor L0 starts to flow to the capacitor C through the diode D0. HV Discharge, replenish energy to capacitor C HV Therefore, the power input voltage of the power rail of the output module 303 is used as the boost signal V HV The voltage can be roughly maintained at a level lower than the load P's driving signal V OUT A level of about 2V higher.

[0135] When the voltage boost module 302 boosts the voltage signal V HV After the output module 303 is replenished with energy, the boosted electrical signal V HV The regulator LDO structure under the power rail can charge and discharge the capacitance of the load P (such as the capacitive piezoelectric sensor Piezo) to achieve arbitrary waveform (including sine wave) output.

[0136] The reference voltage of the voltage regulator LDO is generated by a digital analog converter DAC (digital analog converter, abbreviated as DAC). The digital circuit can output a 12-bit sinusoidal (sin) wave signal code (Code), which is converted into an analog signal by the digital analog converter DAC as the reference voltage of the voltage regulator LDO; then the voltage regulator LDO amplifies the reference voltage and outputs the waveform to the capacitor of the load P.

[0137] After the above circuit design, we can get Figure 4 The voltage waveform signal shown, where the boost voltage signal V HV The voltage is controlled by boost, accurately and stably following the driving electrical signal V OUT Under this condition, the voltage drop (Dropout) of the second-stage regulator LDO is minimized, so the loss energy on the regulator LDO is significantly reduced.

[0138] In summary, it can be seen that the driving circuit device 300 according to the above embodiment of the present invention can achieve the following technical effects:

[0139] (1) The boost function is realized by using open-loop control, and the output voltage is directly compared with the target voltage, and then the switch of the power tube is controlled to obtain a relatively rough follow-up voltage that is not lower than the target voltage, while the precise control of the output voltage is placed at the LDO of the subsequent stage (the voltage carrying the required signal information generated by the digital-to-analog converter is introduced into the LDO, and the conduction current of the power tube in the LDO is controlled according to the error amplifier, logic switch and other structures, so as to achieve precise control of the output voltage). This structure makes the control logic simpler and more direct, and always maintains the stability of the system. In the small load capacitance mode, the simple control method makes the efficiency higher. In addition, this control architecture can timely adjust and expand the required output arbitrary waveform;

[0140] (2) It can flexibly switch between continuous conduction mode (CCM) and discontinuous conduction mode (DCM) according to the load capacitance. When driving heavy load, the system works in continuous conduction mode, and the inductor current is greater than 0 at the end of each cycle and remains continuous in the next cycle. When driving light load, it works in discontinuous conduction mode, and the inductor current drops to 0 at the end of each cycle. The inductor current is discontinuous, which greatly improves the efficiency of the circuit.

[0141] When the load capacitance is very small, BOOST will first work in the discontinuous conduction mode; as the load capacitance gradually increases from small to large, the switching frequency of the discontinuous conduction mode gradually increases; as the load capacitance continues to increase, BOOST will enter the critical conduction mode and then switch to the continuous conduction mode to improve the load capacity.

[0142] (3) The output stage converts the boosted follower voltage through the level conversion of the regulator LDO mode before outputting it, which has a good suppression effect on the output ripple, low output signal distortion and high linearity. The input voltage of the regulator LDO is controlled to follow the output voltage change of the regulator LDO, maintaining a state that is always slightly higher than the output voltage, thereby reducing the voltage difference (dropout) of the regulator LDO and improving the efficiency of the regulator LDO.

[0143] Thus, the technical effect that can be achieved by the control method of the voltage-following driving circuit device of the embodiment of the present invention specifically refers to the technical effect of the voltage-following driving circuit device mentioned above, and at the same time can improve the output efficiency of the load driving electrical signal, reduce circuit power consumption, and improve circuit efficiency.

[0144] Figure 5B The application scenario diagram of the voltage follower drive circuit device, control method, equipment, medium and program product according to the embodiment of the present invention is schematically shown.

[0145] like Figure 5B As shown, the application scenario 500 according to this embodiment may include terminal devices 501, 502, 503, a network 504 and a server 505. The network 504 is used to provide a medium for a communication link between the terminal devices 501, 502, 503 and the server 505. The network 504 may include various connection types, such as wired, wireless communication links or optical fiber cables, etc.

[0146] Users can use terminal devices 501, 502, 503 to interact with server 505 through network 504 to receive or send messages, etc. Various communication client applications can be installed on terminal devices 501, 502, 503, such as shopping applications, web browser applications, search applications, instant messaging tools, email clients, social platform software, etc. (only for example).

[0147] The terminal devices 501 , 502 , and 503 may be various electronic devices having a display screen and supporting web browsing, including but not limited to smart phones, tablet computers, laptop computers, desktop computers, and the like.

[0148] The server 505 may be a server that provides various services, such as a background management server (only an example) that provides support for websites browsed by users using the terminal devices 501, 502, and 503. The background management server may analyze and process the received data such as user requests, and feed back the processing results (such as web pages, information, or data obtained or generated according to user requests) to the terminal device.

[0149] It should be noted that the control method of the voltage follower type driving circuit device provided in the embodiment of the present invention can generally be executed by the server 505. Accordingly, the voltage follower type driving circuit device provided in the embodiment of the present invention can generally be arranged in the server 505. The control method of the voltage follower type driving circuit device provided in the embodiment of the present invention can also be executed by a server or a server cluster that is different from the server 505 and can communicate with the terminal devices 501, 502, 503 and / or the server 505. Accordingly, the voltage follower type driving circuit device provided in the embodiment of the present invention can also be arranged in a server or a server cluster that is different from the server 505 and can communicate with the terminal devices 501, 502, 503 and / or the server 505.

[0150] It should be understood that Figure 5B The number of terminal devices, networks and servers in the embodiment is only for illustration. Any number of terminal devices, networks and servers may be provided according to implementation requirements.

[0151] Figure 6 The block diagram schematically shows an electronic device suitable for implementing a control method of a voltage follower type driving circuit device according to an embodiment of the present invention.

[0152] The electronic device provided by an embodiment of the present invention includes one or more processors and a memory, and the memory is used to store one or more programs, wherein when the one or more programs are executed by the one or more processors, the one or more processors execute the control method of the above-mentioned voltage follower drive circuit device.

[0153] like Figure 6 As shown, the electronic device 600 according to an embodiment of the present invention includes a processor 601, which can perform various appropriate actions and processes according to a program stored in a read-only memory (ROM) 602 or a program loaded from a storage part 608 to a random access memory (RAM) 603. The processor 601 may include, for example, a general-purpose microprocessor (e.g., a CPU), an instruction set processor and / or a related chipset and / or a special-purpose microprocessor (e.g., an application-specific integrated circuit (ASIC)), etc. The processor 601 may also include an onboard memory for caching purposes. The processor 601 may include a single processing unit or multiple processing units for performing different actions of the method flow according to an embodiment of the present invention.

[0154] In RAM 603, various programs and data required for the operation of electronic device 600 are stored. Processor 601, ROM 602 and RAM 603 are connected to each other via bus 604. Processor 601 performs various operations of the method flow according to the embodiment of the present invention by executing the program in ROM 602 and / or RAM 603. It should be noted that the program can also be stored in one or more memories other than ROM 602 and RAM 603. Processor 601 can also perform various operations of the method flow according to the embodiment of the present invention by executing the program stored in the one or more memories.

[0155] According to an embodiment of the present invention, the electronic device 600 may further include an input / output (I / O) interface 605, which is also connected to the bus 604. The electronic device 600 may further include one or more of the following components connected to the I / O interface 605: an input portion 606 including a keyboard, a mouse, etc.; an output portion 607 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc., and a speaker, etc.; a storage portion 608 including a hard disk, etc.; and a communication portion 609 including a network interface card such as a LAN card, a modem, etc. The communication portion 609 performs communication processing via a network such as the Internet. A drive 610 is also connected to the I / O interface 605 as needed. A removable medium 611, such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc., is installed on the drive 610 as needed, so that a computer program read therefrom is installed into the storage portion 608 as needed.

[0156] The present invention also provides a computer-readable storage medium on which executable instructions are stored. When the instructions are executed by a processor, the processor executes the control method of the voltage follower type driving circuit device.

[0157] The computer-readable storage medium may be included in the device / apparatus / system described in the above embodiment; or it may exist independently without being assembled into the device / apparatus / system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the control method of the voltage follower drive circuit device according to the embodiment of the present invention is implemented.

[0158] According to an embodiment of the present invention, the computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, it may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present invention, the computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, an apparatus or a device. For example, according to an embodiment of the present invention, the computer-readable storage medium may include the ROM 602 and / or RAM 603 described above and / or one or more memories other than ROM 602 and RAM 603.

[0159] An embodiment of the present invention further includes a computer program product, which includes a computer program. When the computer program is executed by a processor, the control method of the voltage follower drive circuit device is implemented.

[0160] The computer program includes program codes for executing the method shown in the flowchart. When the computer program product is run in a computer system, the program codes are used to enable the computer system to implement the control method of the voltage follower drive circuit device provided in the embodiment of the present invention.

[0161] The computer program executes the above functions defined in the system / device of the embodiment of the present invention when it is executed by the processor 601. According to the embodiment of the present invention, the system, device, module, unit, etc. described above can be implemented by a computer program module.

[0162] In one embodiment, the computer program may rely on tangible storage media such as optical storage devices, magnetic storage devices, etc. In another embodiment, the computer program may also be transmitted and distributed in the form of signals on a network medium, and downloaded and installed through the communication part 609, and / or installed from a removable medium 611. The program code contained in the computer program may be transmitted using any appropriate network medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0163] In such an embodiment, the computer program can be downloaded and installed from the network through the communication part 609, and / or installed from the removable medium 611. When the computer program is executed by the processor 601, the above functions defined in the system of the embodiment of the present invention are performed. According to the embodiment of the present invention, the system, device, means, module, unit, etc. described above can be implemented by a computer program module.

[0164] According to an embodiment of the present invention, the program code for executing the computer program provided by the embodiment of the present invention can be written in any combination of one or more programming languages. Specifically, these computing programs can be implemented using high-level process and / or object-oriented programming languages, and / or assembly / machine languages. Programming languages ​​include, but are not limited to, Java, C++, python, "C" language or similar programming languages. The program code can be executed entirely on the user computing device, partially on the user device, partially on the remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device can be connected to the user computing device through any type of network, including a local area network (LAN) or a wide area network (WAN), or can be connected to an external computing device (e.g., using an Internet service provider to connect through the Internet).

[0165] The flow chart and block diagram in the accompanying drawings illustrate the possible architecture, function and operation of the system, method and computer program product according to various embodiments of the present invention. In this regard, each box in the flow chart or block diagram can represent a module, a program segment, or a part of a code, and the above-mentioned module, program segment, or a part of a code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram or flow chart, and the combination of the boxes in the block diagram or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0166] In addition, all actions of acquiring information, signals or data in the present invention are carried out in compliance with the corresponding data protection laws, regulations and policies of the country where they are located, and with the authorization given by the owner of the corresponding device.

[0167] It will be appreciated by those skilled in the art that the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways, even if such combinations and / or combinations are not explicitly described in the present invention. In particular, the features described in the various embodiments and / or claims of the present invention may be combined and / or combined in various ways without departing from the spirit and teachings of the present invention. All of these combinations and / or combinations fall within the scope of the present invention.

[0168] The embodiments of the present invention are described above. However, these embodiments are only for the purpose of illustration, and are not intended to limit the scope of the present invention. Although each embodiment is described above, it does not mean that the measures in each embodiment cannot be used in combination. The scope of the present invention is defined by the attached claims and their equivalents. Without departing from the scope of the present invention, those skilled in the art may make various substitutions and modifications, which should all fall within the scope of the present invention.

Claims

1. A voltage follower type driving circuit device, applied to load driving, characterized in that: include: A power supply module, used for providing an input voltage to the voltage follower type driving circuit device; A boost module, connected to the output end of the power module, and used to provide a boosted electrical signal for the load according to the feedback electrical signal of the load and the input voltage; as well as An output module, connected to the output end of the boost module, and used to update the driving electrical signal of the load according to the feedback electrical signal of the load, a preset reference signal and the boost electrical signal; Wherein, the boost module comprises a boost unit, wherein the boost unit comprises a control switch unit, a logic control unit, a first comparison unit and a second comparison unit; The first comparison unit is used to output a first control signal to the logic control unit according to a comparison result between the incremental electrical signal corresponding to the driving electrical signal of the output module and the boost electrical signal; The second comparison unit is used to output a second control signal to the logic control unit according to a comparison result between the switch electrical signal of the control switch unit and a preset peak electrical signal; When the control switch unit is in an open state, the first control signal is configured to control the logic control unit to output a first switch control signal to the gate of the control switch unit, and the first switch control signal is configured to control the control switch unit to be in a conductive state; When the control switch unit is in a conduction state, the second control signal is configured to control the logic control unit to output a second switch control signal to the gate of the control switch unit, and the second switch control signal is configured to control the control switch unit to an open circuit state.

2. The voltage follower type driving circuit device according to claim 1, characterized in that: The power module comprises: A voltage stabilizing unit, having an input end connected to a preset power rail of the power module and an output end connected to ground, is used to provide voltage stabilization for the input voltage of the power module.

3. The voltage follower type driving circuit device according to claim 1, characterized in that: The boost module further comprises: A charging unit, the input end of which is connected to the preset power rail of the power module; one end of the boost unit is connected to the output end of the charging unit, and the other end is grounded; A conduction unit, the input end of which is connected to the output end of the charging unit, and the output end of which is connected to the input end of the output module; The charging and discharging unit has an input end connected to the output end of the conduction unit and an output end grounded, and is used to output a boosted electrical signal to the output module.

4. The voltage follower type driving circuit device according to claim 3, characterized in that: The drain of the control switch unit is connected to the output end of the charging unit, and the source is grounded; The output terminal of the logic control unit is connected to the gate of the control switch unit, and is used to provide a switch control signal to the gate of the control switch unit according to a preset logic control rule.

5. The voltage follower type driving circuit device according to claim 4, characterized in that: The first input terminal of the first comparison unit is connected to the incremental electrical signal, the second input terminal thereof is connected to the boosted electrical signal of the output module, and the output terminal thereof is connected to the third input terminal of the logic control unit; The fifth input terminal of the second comparison unit is connected to the switch electrical signal output by the drain of the control switch unit, the sixth input terminal thereof is connected to the preset peak electrical signal, and the output terminal thereof is connected to the fourth input terminal of the logic control unit.

6. The voltage follower type driving circuit device according to claim 1, characterized in that: The output module comprises: A voltage stabilization control unit, which uses the boosted electrical signal provided by the charging and discharging unit of the boost module as an input power source, has a seventh input terminal connected to the sampled electrical signal of the load, has an eighth input terminal connected to the preset reference signal, and has an output terminal connected to the input terminal of the load, and is used to output a driving electrical signal generated according to a comparison result of the sampled electrical signal and the preset reference signal.

7. The voltage follower type driving circuit device according to claim 6, characterized in that: The output module also includes: A digital-to-analog conversion unit, whose output terminal is connected to the eighth input terminal of the voltage stabilization control unit, is used to generate the preset reference signal by converting the received waveform digital signal through digital-to-analog conversion; The digital signal unit has an output end connected to the input end of the digital-to-analog conversion unit and is used to provide the waveform digital signal to the digital-to-analog conversion unit.

8. The voltage follower type driving circuit device according to claim 6, characterized in that: The output module also includes: The signal sampling unit has one end connected to the output end of the voltage stabilization control unit and the other end grounded.

9. The voltage follower type driving circuit device according to claim 8, characterized in that: The signal sampling unit comprises: a first resistor, one end of which is connected to the output end of the voltage stabilization control unit, and the other end of which is connected to the seventh input end of the voltage stabilization control unit; The second resistor has one end connected to the seventh input terminal of the voltage stabilization control unit and the other end connected to the ground.

10. A control method for a voltage follower type driving circuit device according to any one of claims 1 to 9, characterized in that: include: Controlling the power supply module to provide input voltage to the voltage follower type driving circuit device; Providing a boosted electrical signal to the load through a boost module according to a feedback electrical signal of the load and the input voltage; as well as The control output module updates the driving electric signal of the load according to the feedback electric signal of the load, a preset reference signal and the boost electric signal.

11. An electronic device, comprising: one or more processors; a memory for storing one or more programs, When the one or more programs are executed by the one or more processors, the one or more processors are caused to perform the method of claim 10.

12. A computer-readable storage medium having executable instructions stored thereon, which, when executed by a processor, causes the processor to perform the method of claim 10.

13. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the method according to claim 10 is implemented.

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