Driving circuit based on slope control and amplitude control and electronic equipment

Abstract

The invention relates to the technical field of driving circuits, and discloses a slope control and amplitude control-based driving circuit and electronic equipment, the circuit comprises a control circuit, a feedback circuit, a pre-driving circuit and a driving circuit, and the control circuit provides a first reference signal for controlling the voltage amplitude of a driving signal to the feedback circuit; a second reference signal used for adjusting the slope of the driving signal is provided for the feedback circuit and the pre-driving circuit; clamping the voltage value of the driving signal to the reference voltage value of the first reference signal through a feedback circuit; adjusting the slope of the received first control signal and outputting a second control signal to the driving circuit through the pre-driving circuit based on the second reference signal and the loop current of the feedback circuit; and the driving circuit outputs a driving signal to the load according to the second control signal and feeds back a corresponding feedback signal to the feedback system. Therefore, by implementing the invention, the utilization rate of chip resources can be improved, and the output accuracy and stability of the driving signal are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drive circuits, and in particular to a drive circuit and electronic equipment based on slope control and amplitude control. Background Art

[0002] As the data transmission rate of SoC (System on Chip) continues to increase, the power consumption of the chip increases accordingly, and EMI (Electromagnetic Interference) also increases accordingly. Therefore, existing interface standards usually have requirements for low power consumption and low EMI.

[0003] In practical applications, taking the D-PHY (source synchronous physical layer) of the MIPI (Mobile Industry Processor Interface) protocol as an example, in order to improve signal stability, the LPTX (low power transmitter) driver circuit of D-PHY usually mounts a large feedforward capacitor on the driver power supply. However, practice has found that if the feedforward capacitor is integrated inside the chip, it will occupy too much area on the chip; if the feedforward capacitor is mounted outside the chip, it will occupy the chip's pin resources; and further, the adjustment of the Slew Rate (voltage conversion rate, also known as the slope) by the feedforward capacitor is nonlinear and easily causes output voltage overshoot.

[0004] Therefore, it is particularly important to propose a technical solution that improves the output accuracy and output stability of the driving signal while improving the chip resource utilization to meet the application requirements of low power consumption and low EMI. Summary of the invention

[0005] The present invention provides a driving circuit and electronic equipment based on slope control and amplitude control, which can improve the output accuracy and output stability of the driving signal while improving the chip resource utilization, and is conducive to meeting the application requirements of low power consumption and low EMI.

[0006] In order to solve the above technical problems, the first aspect of the present invention discloses a driving circuit based on slope control and amplitude control, wherein the driving circuit based on slope control and amplitude control comprises a control circuit, a feedback circuit, a pre-driving circuit and a driving circuit, wherein:

[0007] The input end of the control circuit is used to access the reference current, the first output end of the control circuit is electrically connected to the first control end of the feedback circuit, the second output end of the control circuit is electrically connected to the second control end of the feedback circuit and the first input end of the pre-driving circuit respectively, the feedback output end of the feedback circuit is electrically connected to the second input end of the pre-driving circuit, the third input end of the pre-driving circuit is used to access the first control signal, the output end of the pre-driving circuit is electrically connected to the input end of the driving circuit, the first output end of the driving circuit is electrically connected to the feedback input end of the feedback circuit, and the second output end of the driving circuit is used to connect to a load;

[0008] The power supply terminal of the control circuit, the power supply terminal of the feedback circuit, the power supply terminal of the pre-driving circuit and the power supply terminal of the driving circuit are respectively used to connect to a power supply; the ground terminal of the control circuit, the ground terminal of the feedback circuit, the ground terminal of the pre-driving circuit and the ground terminal of the driving circuit are respectively used to be grounded;

[0009] The control circuit is used to adjust the power supply voltage provided by the power supply, and provide the adjusted first reference signal to the feedback circuit; and adjust the received reference current, and provide the adjusted second reference signal to the feedback circuit and the pre-driving circuit; wherein the first reference signal is used to control the voltage amplitude of the driving signal output by the driving circuit through the feedback circuit, and the second reference signal is used to control the slope of the driving signal output by the driving circuit by controlling the loop current of the feedback circuit;

[0010] The feedback circuit is used to clamp the driving voltage value of the driving signal output by the driving circuit to the reference voltage value of the first reference signal, and adjust the loop current of the feedback circuit based on the second reference signal;

[0011] The pre-driving circuit is configured to receive a first control signal, adjust a slope of the first control signal based on the second reference signal and a loop current of the feedback circuit, and output a second control signal obtained by adjustment to the driving circuit;

[0012] The driving circuit is used to output a driving signal to the load according to the second control signal, and feed back a feedback signal corresponding to the driving signal to the feedback circuit.

[0013] As an optional implementation, in the first aspect of the present invention, the control circuit includes an amplitude control circuit and a slope control circuit, wherein:

[0014] The output end of the amplitude control circuit is electrically connected to the first control end of the feedback circuit, and the power supply end of the amplitude control circuit is used to connect to the power supply;

[0015] The input end of the slope control circuit is used to access the reference current, and the output end of the slope control circuit is electrically connected to the second control end of the feedback circuit and the first input end of the pre-driving circuit respectively;

[0016] The ground terminal of the amplitude control circuit and the ground terminal of the slope control circuit are respectively used for grounding.

[0017] As an optional implementation, in the first aspect of the present invention, the amplitude control circuit includes a voltage division adjustment module and a voltage follower module, wherein:

[0018] The first end of the voltage division regulating module is electrically connected to the first end of the voltage following module, and the second end of the voltage following module is electrically connected to the first control end of the feedback circuit;

[0019] The second end of the voltage-dividing regulating module and the second end of the voltage-following module are used to connect to the power supply, and the third end of the voltage-dividing regulating module is used to be grounded.

[0020] As an optional implementation, in the first aspect of the present invention, the voltage division regulation module includes a basic voltage division unit and at least two voltage division control units arranged in sequence from the power supply to the basic voltage division unit, wherein:

[0021] For each of the voltage division control units, when the voltage division control unit is ranked first, the first end of the voltage division control unit is used to connect to the power supply; when the voltage division control unit is not ranked first, the first end of the voltage division control unit is electrically connected to the second end of the voltage division control unit that is ranked first; when the voltage division control unit is ranked last, the second end of the voltage division control unit is electrically connected to the first end of the basic voltage division unit;

[0022] The third terminal of each of the voltage division control units is electrically connected to the first terminal of the voltage follower module respectively;

[0023] The second end of the basic voltage dividing unit is used for grounding.

[0024] As an optional implementation, in the first aspect of the present invention, the slope control circuit includes at least two current control modules, wherein:

[0025] The first end of each current control module is used to access the reference current, the second end of each current control module is electrically connected to the second control end of the feedback circuit and the first input end of the pre-drive circuit, and the third end of each current control module is used for grounding.

[0026] As an optional implementation, in the first aspect of the present invention, the feedback circuit includes a first loop module and a second loop module, wherein:

[0027] The first end of the first loop module is electrically connected to the first output end of the control circuit, the second end of the first loop module is electrically connected to the second output end of the control circuit and the first input end of the pre-driving circuit respectively, the third end of the first loop module is electrically connected to the first end of the second loop module, and the fourth end of the first loop module is used for grounding;

[0028] The second end of the second loop module is electrically connected to the first output end of the drive circuit, the third end of the second loop module is electrically connected to the second input end of the pre-drive circuit, the fourth end of the second loop module is used to connect to the power supply, and the fifth end of the second loop module is used to be grounded.

[0029] As an optional implementation, in the first aspect of the present invention, the first loop module includes a first current mirror unit and a second current mirror unit, wherein:

[0030] The first end of the first current mirror unit is electrically connected to the second output end of the control circuit and the first input end of the pre-driving circuit respectively, the second end of the first current mirror unit is electrically connected to the first end of the second current mirror unit, and the third end of the first current mirror unit is used for grounding; the second end of the second current mirror unit is electrically connected to the first output end of the control circuit, and the third end of the second current mirror unit is electrically connected to the first end of the second loop module;

[0031] And, the second loop module includes a third current mirror unit, a fourth current mirror unit and a fifth current mirror unit, wherein:

[0032] The first end of the third current mirror unit is electrically connected to the third end of the second current mirror unit, the second end of the third current mirror unit is electrically connected to the first output end of the drive circuit, the third end of the third current mirror unit is electrically connected to the first end of the fourth current mirror unit, the second end of the fourth current mirror unit is electrically connected to the first end of the fifth current mirror unit, the third end of the fourth current mirror unit and the fourth end of the fourth current mirror unit are used for grounding; the second end of the fifth current mirror unit is electrically connected to the second input end of the pre-drive circuit; the third end of the fifth current mirror unit and the fourth end of the fifth current mirror unit are used for connecting to the power supply.

[0033] As an optional implementation, in the first aspect of the present invention, the pre-driving circuit includes a first push-pull module and a signal conditioning module, wherein:

[0034] The first end of the first push-pull module is used to receive the first control signal, the second end of the first push-pull module is used to connect the power supply, the third end of the first push-pull module is electrically connected to the first end of the signal adjustment module, the feedback output end of the feedback circuit, and the input end of the drive circuit respectively, the fourth end of the first push-pull module is electrically connected to the second end of the signal adjustment module, and the fifth end of the first push-pull module is used to be grounded;

[0035] The third terminal of the signal adjustment module is electrically connected to the second control terminal of the feedback circuit and the second output terminal of the control circuit respectively.

[0036] As an optional implementation, in the first aspect of the present invention, the driving circuit includes a second push-pull module and an impedance matching module, wherein:

[0037] The input end of the second push-pull module is electrically connected to the output end of the pre-driving circuit, the output end of the second push-pull module is electrically connected to the feedback input end of the feedback circuit and the first end of the impedance matching module respectively, the power supply end of the second push-pull module is used to connect the power supply, and the ground end of the second push-pull module is used for grounding; the second end of the impedance matching module is used to connect the load.

[0038] A second aspect of the present invention discloses an electronic device, comprising a device body and a driving circuit based on slope control and amplitude control as disclosed in any one of the first aspects.

[0039] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0040] In the present invention, a driving circuit with a simple structure, adjustable slope, stable and adjustable amplitude is provided. A first reference signal for controlling the voltage amplitude of a driving signal can be provided to a feedback circuit based on a power supply voltage through a control circuit included in the circuit, and a second reference signal for adjusting the slope of the driving signal can be provided to the feedback circuit and the pre-driving circuit based on a reference current. Then, the voltage value of the driving signal is clamped to the reference voltage value of the first reference signal through the feedback circuit to control the voltage amplitude of the driving signal. Then, the pre-driving circuit adjusts the slope of the received first control signal based on the second reference signal and the loop current of the feedback circuit, and outputs a second control signal to the driving circuit. Then, the driving circuit outputs the driving signal to the load according to the second control signal and feeds back a corresponding feedback signal to the feedback system. Through a simple circuit structure, the chip area and external interface resources can be effectively saved, which is beneficial to reducing the driving cost. At the same time, the adjustment flexibility, adjustment accuracy and stability of the voltage amplitude of the output driving signal are improved, and the adjustment flexibility and adjustment accuracy of the slope of the output driving signal are improved, so that the output accuracy and stability of the driving signal can be improved while improving the utilization rate of chip resources, which is beneficial to meeting the application requirements of low power consumption and low EMI driving application scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0042] Figure 1 It is a structural schematic diagram of a driving circuit based on slope control and amplitude control disclosed in an embodiment of the present invention;

[0043] Figure 2 is a structural schematic diagram of another driving circuit based on slope control and amplitude control disclosed in an embodiment of the present invention;

[0044] Figure 3 It is a schematic diagram of a framework of a driving circuit based on slope control and amplitude control disclosed in the present invention;

[0045] Figure 4 It is a structural schematic diagram of another driving circuit based on slope control and amplitude control disclosed in an embodiment of the present invention;

[0046] Figure 5 It is a structural schematic diagram of another driving circuit based on slope control and amplitude control disclosed in an embodiment of the present invention;

[0047] Figure 6It is a schematic diagram of the principle of a driving circuit based on slope control and amplitude control disclosed in the present invention;

[0048] Figure 7 It is a current loop schematic diagram of a driving circuit based on slope control and amplitude control disclosed in the present invention;

[0049] Figure 8 It is a structural schematic diagram of an electronic device disclosed in an embodiment of the present invention. DETAILED DESCRIPTION

[0050] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the present invention and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0052] Embodiment 1

[0053] See also Figure 1 , Figure 1It is a structural diagram of a driving circuit based on slope control and amplitude control disclosed in an embodiment of the present invention. Among them, the circuit can be applied to electronic devices with low power consumption and low EMI driving requirements. Optionally, the above-mentioned electronic device can be one of the LPTX (low power transmitter) in the D-PHY (source synchronous physical layer) of the MIPI (Mobile Industry Processor Interface) protocol, the Full-Speed ​​interface of the USB, and the AUX channel (auxiliary channel) of the DP (DisplayPort, digital audio and video interface standard) protocol, which is not limited in the embodiment of the present invention. Figure 1 As shown, the driving circuit 10 based on slope control and amplitude control may include a control circuit 101, a feedback circuit 102, a pre-driving circuit 103 and a driving circuit 104, wherein:

[0054] The input end of the control circuit 101 is used to access the reference current, the first output end of the control circuit 101 is electrically connected to the first control end of the feedback circuit 102, the second output end of the control circuit 101 is electrically connected to the second control end of the feedback circuit 102 and the first input end of the pre-driving circuit 103 respectively, the feedback output end of the feedback circuit 102 is electrically connected to the second input end of the pre-driving circuit 103, the third input end of the pre-driving circuit 103 is used to access the first control signal, the output end of the pre-driving circuit 103 is electrically connected to the input end of the driving circuit 104, the first output end of the driving circuit 104 is electrically connected to the feedback input end of the feedback circuit 102, and the second output end of the driving circuit 104 is used to connect to the load;

[0055] The power supply terminal of the control circuit 101, the power supply terminal of the feedback circuit 102, the power supply terminal of the pre-driving circuit 103 and the power supply terminal of the driving circuit 104 are respectively used to connect to the power supply; the ground terminal of the control circuit 101, the ground terminal of the feedback circuit 102, the ground terminal of the pre-driving circuit 103 and the ground terminal of the driving circuit 104 are respectively used to be grounded;

[0056] The control circuit 101 is used to adjust the power supply voltage provided by the power supply, and provide the adjusted first reference signal to the feedback circuit 102; and adjust the received reference current, and provide the adjusted second reference signal to the feedback circuit 102 and the pre-driving circuit 103; wherein the first reference signal is used to control the voltage amplitude of the driving signal output by the driving circuit 104 through the feedback circuit 102, and the second reference signal is used to control the loop current of the feedback circuit 102, thereby controlling the slope of the driving signal output by the driving circuit 104;

[0057] The feedback circuit 102 is used to clamp the driving voltage value of the driving signal output by the driving circuit 104 to the reference voltage value of the first reference signal, and adjust the loop current of the feedback circuit based on the second reference signal;

[0058] The pre-driving circuit 103 is used to receive the first control signal, and adjust the slope of the first control signal based on the second reference signal and the loop current of the feedback circuit 102, and output the adjusted second control signal to the driving circuit 104;

[0059] The driving circuit 104 is used to output a driving signal to the load according to the second control signal, and feed back a feedback signal corresponding to the driving signal to the feedback circuit 102 .

[0060] The voltage amplitude of the driving signal may be the voltage peak value of the driving signal or the high level of the driving signal; the slope of the driving signal may be the voltage conversion rate, that is, the amplitude of the voltage increase in a unit time such as 1 microsecond or 1 nanosecond.

[0061] Further, the first control signal may be a signal output by a signal source. Exemplarily, the signal source may be a control chip, which is not limited in the embodiment of the present invention.

[0062] Exemplarily, the power supply may be VDD or VCC, which is not limited in the embodiment of the present invention.

[0063] It can be seen that the embodiment of the present invention provides a driving circuit with a simple structure, adjustable slope, stable and adjustable amplitude. The control circuit included in the circuit can provide a first reference signal for controlling the voltage amplitude of the driving signal to the feedback circuit based on the power supply voltage, and provide a second reference signal for adjusting the slope of the driving signal to the feedback circuit and the pre-driving circuit based on the reference current. Then, the voltage value of the driving signal is clamped to the reference voltage value of the first reference signal through the feedback circuit to control the voltage amplitude of the driving signal. Then, the pre-driving circuit adjusts the slope of the received first control signal based on the second reference signal and the loop current of the feedback circuit, and outputs the second control signal to the driving circuit. Then, the driving circuit outputs the driving signal to the load according to the second control signal and feeds back the corresponding feedback signal to the feedback system. Through a simple circuit structure, the chip area and external interface resources can be effectively saved, which is conducive to reducing the driving cost. At the same time, the adjustment flexibility, adjustment accuracy and stability of the voltage amplitude of the output driving signal are improved, and the adjustment flexibility and adjustment accuracy of the slope of the output driving signal are improved, so that the output accuracy and stability of the driving signal can be improved while improving the chip resource utilization, which is conducive to meeting the application requirements of low power consumption and low EMI driving application scenarios.

[0064] In an alternative embodiment, Figure 2is a schematic diagram of the structure of another driving circuit based on slope control and amplitude control disclosed in an embodiment of the present invention, such as Figure 2 As shown, the control circuit 101 may include an amplitude control circuit 1011 and a slope control circuit 1012, wherein:

[0065] The output end of the amplitude control circuit 1011 is electrically connected to the first control end of the feedback circuit 102, and the power supply end of the amplitude control circuit 1011 is used to connect to the power supply;

[0066] The input end of the slope control circuit 1012 is used to access the reference current, and the output end of the slope control circuit 1012 is electrically connected to the second control end of the feedback circuit 102 and the first input end of the pre-driving circuit 103 respectively;

[0067] The ground terminal of the amplitude control circuit 1011 and the ground terminal of the slope control circuit 1012 are respectively used for grounding.

[0068] Among them, the amplitude control circuit 1011 is used to adjust the power supply voltage provided by the power supply and provide the adjusted first reference signal to the feedback circuit 102; the slope control circuit 1012 is used to adjust the received reference current and provide the adjusted second reference signal to the feedback circuit 102 and the pre-drive circuit 103.

[0069] Furthermore, the amplitude control circuit 1011 can actually be an amplitude-adjustable LDO (low-dropout linear regulator) circuit without external capacitors. Compared with the prior art, this does not require the installation of a larger feedforward capacitor, thereby saving chip area, which is beneficial to improving chip resource utilization and transient stability.

[0070] In the embodiment of the present invention, the schematic diagram of the framework of the driving circuit based on slope control and amplitude control can be shown as follows: Figure 3 As shown, Figure 3 : is a schematic diagram of a driving circuit based on slope control and amplitude control disclosed in the present invention, wherein:

[0071] Figure 3 The Adjust Capless LDO system is an amplitude-adjustable LDO system without external capacitors, that is, the amplitude control circuit 1011; Figure 3 The Slewrate Control System is a slope control system, that is, the slope control circuit 1012; Figure 3 The Feedback System in is the feedback system, that is, the feedback circuit 102 mentioned above; Figure 3 The Pre-Driver in the figure is a pre-driving system, that is, the pre-driving circuit 103 mentioned above; Figure 3Driver in the figure is a driving system, that is, the driving circuit 104 mentioned above;

[0072] Among them, Figure 3 As shown, a first reference signal vout_ctrl for controlling the voltage amplitude of a driving signal is provided to a feedback system through a non-external capacitor LDO system, and a second reference signal slewrate_ctrl for controlling the slope of the driving signal is provided to the feedback system through a slope control system. After receiving the first control signal din, the pre-driving system adjusts the first control signal din through vout_fbout provided by the feedback system, thereby providing an adjusted second control signal din_pre to the driving system. Then, based on the second control signal, the driving system outputs a driving signal to a load, and feeds back a corresponding feedback signal to the feedback system.

[0073] It can be seen that this optional embodiment can improve the convenience, flexibility and accuracy of adjusting the voltage amplitude while saving chip resources by using an amplitude control circuit that does not require mounting a feedforward capacitor, and is beneficial to making the circuit transient stable, improving the control stability of the driving circuit, and improving the output accuracy and stability of the driving signal; through the slope control circuit, the adjustment flexibility and accuracy of the slope of the driving signal are improved, which is beneficial to improving the output accuracy of the driving signal.

[0074] In this optional embodiment, optionally, Figure 4 is a schematic diagram of the structure of another driving circuit based on slope control and amplitude control disclosed in an embodiment of the present invention, such as Figure 4 As shown, the amplitude control circuit 1011 may include a voltage division adjustment module 10111 and a voltage following module 10112, wherein:

[0075] A first end of the voltage-dividing regulating module 10111 is electrically connected to a first end of the voltage-following module 10112, and a second end of the voltage-following module 10112 is electrically connected to a first control end of the feedback circuit 102;

[0076] The second end of the voltage-dividing regulating module 10111 and the second end of the voltage-following module 10112 are used to connect to a power supply, and the third end of the voltage-dividing regulating module 10111 is used to be grounded.

[0077] The voltage division regulating module 10111 is used to divide and regulate the power supply voltage provided by the power supply to obtain an input voltage, and input the input voltage to the voltage following module 10112;

[0078] The voltage follower module 10112 is used to stably output a first reference signal to the feedback circuit based on the input voltage, wherein the reference voltage value of the first reference signal is equal to the input voltage value.

[0079] In this optional embodiment, optionally, the voltage division adjustment module 10111 can be implemented by an adjustable resistor voltage division structure, or by a Bandgap (bandgap reference) structure, which is not limited in the embodiment of the present invention.

[0080] It can be seen that this optional embodiment can also improve the flexibility and accuracy of the voltage division adjustment by flexibly setting the voltage adjustment module to adjust the input voltage to the voltage following module, which is beneficial to improving the control accuracy and control convenience of the input voltage, and, through the characteristics of the voltage following module such as increasing the input impedance, reducing the output impedance and isolating the load influence, while helping to reduce the power consumption of the amplitude control circuit, stably outputting the first reference signal with a reference voltage value equal to the input voltage to the feedback circuit, which can improve the output stability and output accuracy of the reference voltage, thereby helping the feedback circuit to accurately clamp the voltage value of the drive signal to the voltage value obtained by the voltage division adjustment of the voltage division adjustment module, further improving the control accuracy of the voltage amplitude of the drive signal, and further improving the output accuracy of the drive signal.

[0081] In this optional embodiment, optionally, the voltage division regulating module 10111 includes a basic voltage division unit 101111 and at least two voltage division control units 101112 arranged in sequence from the power supply to the basic voltage division unit 101111, wherein:

[0082] For each voltage division control unit 101112, when the voltage division control unit 101112 is ranked first, the first end of the voltage division control unit 101112 is used to connect to the power supply; when the voltage division control unit 101112 is not ranked first, the first end of the voltage division control unit 101112 is electrically connected to the second end of the voltage division control unit 101112 that is ranked first; when the voltage division control unit 101112 is ranked last, the second end of the voltage division control unit 101112 is electrically connected to the first end of the basic voltage division unit 101111;

[0083] The third end of each voltage division control unit 101112 is electrically connected to the first end of the voltage follower module 10112; the second end of the basic voltage division unit 101111 is used for grounding.

[0084] When the voltage division regulating module 10111 includes a basic voltage division unit 101111 and two voltage division control units 101112, the structural diagram of the driving circuit based on slope control and amplitude control can be as follows: Figure 4 shown.

[0085] In this optional embodiment, optionally, Figure 5 is a schematic diagram of the structure of another driving circuit based on slope control and amplitude control disclosed in an embodiment of the present invention, such as Figure 5As shown, each voltage division control unit 101112 may include a first voltage division resistor Rvn (n=1, 2, ...) and a first switch Svn (n=1, 2, ...) corresponding to the first voltage division resistor Rvn, and the basic voltage division unit 101111 may include a second voltage division resistor Rv(n+1), wherein:

[0086] For each voltage division control unit 101112, when the voltage division control unit 101112 is ranked first, the voltage division control unit 101112 includes a first voltage division resistor Rv1 and a first switch Sv1 corresponding to the first voltage division resistor Rv1, and the first end of the first voltage division resistor Rv1 is used to connect to the power supply;

[0087] For each voltage division control unit 101112, when the voltage division control unit 101112 is not ranked first, the first end of the first voltage division resistor Rvn included in the voltage division control unit 101112 is electrically connected to the second end of the first voltage division resistor Rv(n-1) in the voltage division control unit 101112 ranked first and the first end of the first switch Sv(n-1);

[0088] For each voltage division control unit 101112, the second end of the first voltage division resistor Rvn included in the voltage division control unit 101112 is electrically connected to the first end of the first switch Svn included in the voltage division control unit 101112;

[0089] The second end of the first switch Svn included in each voltage division control unit 101112 is electrically connected to the first end of the voltage follower module 10112;

[0090] The first end of the second voltage-dividing resistor Rv(n+1) is electrically connected to the second end of the first voltage-dividing resistor Rvn included in the last-ordered voltage-dividing control unit 101112 and the first end of the first switch Svn corresponding to the first voltage-dividing resistor Rvn, and the second end of the second voltage-dividing resistor Rv(n+1) is used for grounding.

[0091] Among them, in this embodiment, the voltage division adjustment module 10111 is an adjustable resistance voltage division structure. When the voltage amplitude of the driving signal needs to be adjusted, one of the first switches of all the voltage division control units 101112 can be selected to close, so as to adjust the resistance voltage division of the voltage division adjustment module 10111, and then adjust the input voltage to the voltage follower module 101112; if the closed first switch is ranked later, the more resistors are connected in series from the power supply to the closed first switch, the larger the resistance value, the larger the corresponding voltage division, so that the input voltage to the voltage follower module 10112 is larger, and then the voltage amplitude of the driving signal is larger. Specifically, the circuit output waveform corresponding to the driving circuit 10 - the adjustable output voltage amplitude relationship can be referred to. Figure 6 (1) Figure 6 is a schematic diagram of a driving circuit based on slope control and amplitude control disclosed in the present invention, wherein: Figure 6 dout is the driving signal output by the circuit, and vref is the reference voltage.

[0092] It can be seen that this optional embodiment can also flexibly adjust the input voltage to the voltage follower module based on the adjustable resistance voltage divider structure through the multiple voltage division control units provided by the voltage division adjustment module, which can further improve the adjustment flexibility of the resistance voltage division, thereby further improving the adjustment flexibility of the voltage amplitude of the driving signal, which is conducive to meeting the adjustment requirements of different voltage amplitudes, and further conducive to outputting a more accurate driving signal; and the circuit structure is simple, which can reduce the voltage amplitude control cost and improve the scalability of the circuit.

[0093] In this optional embodiment, optionally, as Figure 5 As shown, the voltage follower module 10112 may include an operational amplifier U1 and a first switch device Mv1, wherein:

[0094] The first input terminal of the operational amplifier U1 is electrically connected to the second terminal of each first switch, the output terminal of the operational amplifier U1 is electrically connected to the first terminal of the first switching device Mv1, the second terminal of the first switching device Mv1 is used to connect to the power supply, and the second input terminal of the operational amplifier U2 is electrically connected to the third terminal of the first switching device Mv1 and the first control terminal of the feedback circuit 102.

[0095] Optionally, the first switching device Mvn may include but is not limited to any device or component such as an N-type MOS tube and a P-type MOS tube that can play an equivalent switching control role, which can be beneficial for selecting a suitable switching device according to the actual situation of the components, thereby improving the applicability of the circuit; wherein, exemplarily, when the first switching device is a P-type MOS tube, the first end of the first switching device is a gate, the second end of the first switching device is a source, and the third end of the first switching device is a drain.

[0096] Among them, Figure 5 As shown, the input voltage vref of the operational amplifier U1 is equal to the reference voltage vdout of the first reference signal output by the first switching device Mv1, so that the function of stable output is achieved through the voltage follower module 10112.

[0097] It can be seen that this optional embodiment can also stably input the input voltage obtained by voltage division into the feedback circuit by setting a voltage follower composed of an operational amplifier and a switching device, which is beneficial to further improve the output stability and output accuracy of the reference voltage, thereby facilitating the feedback circuit to more accurately clamp the voltage value of the drive signal to the voltage value obtained by voltage division regulation of the voltage divider regulation module.

[0098] In this optional embodiment, optionally, the slope control circuit 1012 may include at least two current control modules 10121, wherein:

[0099] The first end of each current control module 10121 is used to access the reference current, the second end of each current control module 10121 is electrically connected to the second control end of the feedback circuit 102 and the first input end of the pre-drive circuit 103, and the third end of each current control module 10121 is used for grounding.

[0100] When the slope control circuit 1012 includes two current control modules 10121, the structural diagram of the driving circuit based on slope control and amplitude control can be as follows: Figure 4 shown.

[0101] In this optional embodiment, optionally, as Figure 5 As shown, each current control module 10121 may include a second switch device Min (n=1, 2, ...) and a second switch Sin (n=1, 2, ...) corresponding to the second switch device Min, wherein:

[0102] The first terminal of each second switch device Min is used to access the reference current (such as Figure 5 iref as shown), the second end of each second switching device Min is electrically connected to the second control end of the feedback circuit 102 and the first input end of the pre-driving circuit 103, and the first end of each second switching device Min is also electrically connected to the second end of the second switching device Min, the third end of each second switching device Min is electrically connected to the first end of the second switch Sin corresponding to the second switching device Min, and the second end of each second switch Sin is used for grounding.

[0103] Optionally, the second switching device Min may include but is not limited to any device or component such as an N-type MOS tube and a P-type MOS tube that can play an equivalent switching control role, which can be helpful in selecting a suitable switching device according to the actual situation of the components, thereby improving the applicability of the circuit; wherein, exemplarily, when the second switching device Min is an N-type MOS tube, the first end of the second switching device is the drain, the second end of the second switching device is the gate, and the third end of the second switching device is the source.

[0104] Among them, when the slope of the driving signal needs to be adjusted, at least one second switch Sin can be arbitrarily selected from the slope control circuit 1012 to be closed, so as to adjust the reference current input to the slope control circuit 1012; if the number of second switches Sin closed is greater, the number of second switch devices Min connected to the circuit is greater, that is, the reference current input to the slope control circuit 1012 is greater, so that the current input to the feedback circuit 102 and the pre-driving circuit 103 is greater, thereby adjusting the slope of the driving signal. Specifically, the circuit output waveform corresponding to the driving circuit 1012 - the slope adjustable relationship can be referred to Figure 6 (2) Figure 6 is a schematic diagram of a driving circuit based on slope control and amplitude control disclosed in the present invention, wherein: Figure 6 dout is the driving signal output by the circuit, and iref is the reference current.

[0105] It can be seen that this optional embodiment can also flexibly adjust the reference current input to the feedback circuit through the multiple current control modules provided by the slope control circuit, which can improve the output flexibility and adjustment flexibility of the reference current, thereby improving the adjustment flexibility of the loop current of the feedback circuit, and further improving the adjustment flexibility of the slope of the drive signal, which is conducive to meeting different slope adjustment requirements, and is conducive to outputting a more accurate drive signal; and the circuit structure is simple, which can reduce the slope adjustment cost and improve the scalability of the circuit.

[0106] In another optional embodiment, Figure 4 As shown, the feedback circuit 102 may include a first loop module 1021 and a second loop module 1022, wherein:

[0107] A first end of the first loop module 1021 is electrically connected to a first output end of the control circuit 101, a second end of the first loop module 1021 is electrically connected to a second output end of the control circuit 101 and a first input end of the pre-driving circuit 103, a third end of the first loop module 1021 is electrically connected to a first end of the second loop module 1022, and a fourth end of the first loop module 1021 is grounded;

[0108] The second end of the second loop module 1022 is electrically connected to the first output end of the driving circuit 104, the third end of the second loop module 1022 is electrically connected to the second input end of the pre-driving circuit 103, the fourth end of the second loop module 1022 is used to connect to the power supply, and the fifth end of the second loop module 1022 is used to be grounded.

[0109] The first loop module 1021 and the second loop module 1022 are mirror-imaged in proportion, so that the voltage at the first output end of the control circuit 101 is equal to the voltage at the first output end of the driving circuit 104, so as to clamp the driving voltage value of the driving signal output by the driving circuit 104 to the reference voltage value of the first reference signal.

[0110] It can be seen that this optional embodiment can facilitate making the first loop module and the second loop module mirror-imaged in proportion by setting the first loop module and the second loop module of the feedback loop, thereby clamping the driving voltage value of the driving signal output by the driving circuit 104 to the reference voltage value of the first reference signal, and can flexibly adjust the loop current through the feedback loop, thereby being able to accurately adjust the slope of the driving signal depending on the loop current.

[0111] In this optional embodiment, optionally, as Figure 4 As shown, the first loop module 1021 may include a first current mirror unit 10211 and a second current mirror unit 10212, wherein:

[0112] The first end of the first current mirror unit 10211 is electrically connected to the second output end of the control circuit 101 and the first input end of the pre-drive circuit 103 respectively, the second end of the first current mirror unit 10211 is electrically connected to the first end of the second current mirror unit 10212, and the third end of the first current mirror unit 10211 is used for grounding; the second end of the second current mirror unit 10212 is electrically connected to the first output end of the control circuit 101, and the third end of the second current mirror unit 10212 is electrically connected to the first end of the second loop module 1022.

[0113] and, optionally, Figure 4 As shown, the second loop module 1022 may include a third current mirror unit 10221, a fourth current mirror unit 10222 and a fifth current mirror unit 10223, wherein:

[0114] The first end of the third current mirror unit 10221 is electrically connected to the third end of the second current mirror unit 10212, the second end of the third current mirror unit 10221 is electrically connected to the first output end of the driving circuit 104, the third end of the third current mirror unit 10221 is electrically connected to the first end of the fourth current mirror unit 10222, the second end of the fourth current mirror unit 10222 is electrically connected to the first end of the fifth current mirror unit 10223, the third end of the fourth current mirror unit 10222 and the fourth end of the fourth current mirror unit 10222 are used for grounding; the second end of the fifth current mirror unit 10223 is electrically connected to the second input end of the pre-driving circuit 103; the third end of the fifth current mirror unit 10223 and the fourth end of the fifth current mirror unit 10223 are used to connect to the power supply.

[0115] In this optional embodiment, optionally, as Figure 5 As shown, the first current mirror unit 10211 may include a third switch device M1, and the second current mirror unit 10212 may include a fourth switch device M2, wherein:

[0116] The first end of the third switch device M1 is electrically connected to the second output end of the control circuit 101 and the first input end of the pre-drive circuit 103, respectively; the second end of the third switch device M1 is electrically connected to the first end of the fourth switch device M2 and the second end of the fourth switch device M2, respectively; the third end of the third switch device M1 is used for grounding; the third end of the fourth switch device M2 is electrically connected to the first output end of the control circuit 101, and the first end of the fourth switch device M2 is also electrically connected to the first end of the second loop module 1022.

[0117] Optionally, the switch device in this embodiment (such as the third switch device M1 and the fourth switch device M2) may include, but is not limited to, any device or component that can play an equivalent switch control role, such as an N-type MOS tube and a P-type MOS tube. Wherein, illustratively, when the third switch device M1 is an N-type MOS tube, the first end of the third switch device M1 is a gate, the second end of the third switch device M1 is a drain, and the third end of the third switch device M1 is a source; when the fourth switch device M2 is a P-type MOS tube, the first end of the fourth switch device M2 is a gate, the second end of the fourth switch device M2 is a drain, and the third end of the fourth switch device M2 is a source.

[0118] Optionally, the third current mirror unit 10221 may include a fifth switch device M3, the fourth current mirror unit 10222 may include a sixth switch device M4 and a seventh switch device M5, and the fifth current mirror unit 10223 may include an eighth switch device M6 and a ninth switch device M7, wherein:

[0119] The first end of the fifth switch device M3 is electrically connected to the first end of the fourth switch device M2, the second end of the fifth switch device M3 is electrically connected to the first output end of the drive circuit 104, and the third end of the fifth switch device M3 is electrically connected to the first end of the sixth switch device M4 and the second end of the sixth switch device M4 respectively; the first end of the sixth switch device M4 is also electrically connected to the first end of the seventh switch device M5; the second end of the seventh switch device M5 is respectively electrically connected to the first end of the eighth switch device M6 and the second end of the eighth switch device M6, and the third end of the sixth switch device M4 and the third end of the seventh switch device M5 are used for grounding; the first end of the eighth switch device M6 is also electrically connected to the first end of the ninth switch device M7, the second end of the ninth switch device M7 is electrically connected to the second input end of the pre-drive circuit 103, and the third end of the eighth switch device M6 and the third end of the ninth switch device M7 are used for connecting to the power supply.

[0120] Optionally, the switch devices (such as the fifth switch device M3 and the sixth switch device M4) in this embodiment may include but are not limited to any devices or components such as N-type MOS tubes and P-type MOS tubes that can play an equivalent switch control role. Exemplarily, when the fifth switch device M3 is a P-type MOS tube, the first end of the fifth switch device M3 is a gate, the second end of the fifth switch device M3 is a source, and the third end of the fifth switch device M3 is a drain; when the sixth switch device M4 and the seventh switch device M5 are N-type MOS tubes, the first end of the sixth switch device M4 and the seventh switch device M5 is a gate, the second end of the sixth switch device M4 and the seventh switch device M5 is a drain, and the third end of the sixth switch device M4 and the seventh switch device M5 is a source; when the eighth switch device M6 and the ninth switch device M7 are P-type MOS tubes, the first end of the eighth switch device M6 and the ninth switch device M7 is a gate, the second end of the eighth switch device M6 and the ninth switch device M7 is a drain, and the third end of the eighth switch device M6 and the ninth switch device M7 is a source.

[0121] The feedback circuit 102 forms a current mirror loop through a plurality of switch devices to realize the feedback function, wherein the loop gain of the current mirror loop needs to be large enough, that is, the current mirror amplification factor needs to reach a preset factor, that is, the size ratio of the two P-type MOS tubes of the fourth switch device M2 and the fifth switch device M3, as shown in the following formula:

[0122]

[0123] And, the source voltage of the fourth switching device M2 is equal to the source voltage of the fifth switching device M3, such as Figure 5 As shown, vdout=dout_fb, that is, the driving voltage value of the driving signal output by the driving circuit 104 is clamped to the reference voltage value of the first reference signal.

[0124] It can be seen that this optional embodiment can also use a current mirror loop to implement a feedback circuit, and use a current mirror image feedback method to clamp the voltage of the drive signal, which can improve the stability and accuracy of the voltage clamping, thereby helping to improve the accuracy of adjusting the voltage amplitude of the drive signal; and when adjusting the slope of the drive signal through the loop current, it is not easy to cause overshoot, which is beneficial to improving the stability of the circuit, and the adjustment of the slope of the drive signal depends on the current size of the feedback loop, which is beneficial to improving the linearity of the slope adjustment, thereby further improving the stability of the slope adjustment of the drive signal, and then helping to improve the output stability and output accuracy of the drive signal.

[0125] In yet another optional embodiment, the pre-driving circuit 103 includes a first push-pull module 1031 and a signal adjustment module 1032, wherein:

[0126] The first end of the first push-pull module 1031 is used to receive the first control signal, the second end of the first push-pull module 1031 is used to connect to the power supply, the third end of the first push-pull module 1031 is electrically connected to the first end of the signal adjustment module 1032, the feedback output end of the feedback circuit 102, and the input end of the driving circuit 104, respectively, the fourth end of the first push-pull module 1031 is electrically connected to the second end of the signal adjustment module 1032, and the fifth end of the first push-pull module 1031 is used for grounding;

[0127] The third terminal of the signal adjustment module 1032 is electrically connected to the second control terminal of the feedback circuit 102 and the second output terminal of the control circuit 101 respectively.

[0128] The signal adjustment module 1032 is used to adjust the current flowing through the pre-driving circuit 103 , thereby controlling the slope of the driving signal output by the driving circuit 104 .

[0129] In this optional embodiment, optionally, as Figure 5 As shown, the first push-pull module 1031 may include a tenth switch device M9 and an eleventh switch device M10, and the signal adjustment module 1032 may include a twelfth switch device M8, wherein:

[0130] The first end of the tenth switch device M9 and the first end of the eleventh switch device M10 are both connected to the first control signal, the second end of the tenth switch device M9 is used to connect to the power supply, the first end of the twelfth switch device M8 is electrically connected to the second control end of the feedback circuit 102 and the second output end of the control circuit 101, respectively, the second end of the twelfth switch device M8 is electrically connected to the third end of the tenth switch device M9, the feedback output end of the feedback circuit 102, and the input end of the drive circuit 104, respectively, the third end of the twelfth switch device M8 is electrically connected to the second end of the eleventh switch device M10, and the third end of the eleventh switch device M10 is used for grounding.

[0131] Optionally, the switch device in this embodiment (such as: the tenth switch device M9, the eleventh switch device M10) may include but is not limited to any device or component that can play an equivalent switch control role, such as an N-type MOS tube and a P-type MOS tube. Wherein, illustratively, when the tenth switch device M9 is a P-type MOS tube, the first end of the tenth switch device M9 is a gate, the second end of the tenth switch device M9 is a source, and the third end of the tenth switch device M9 is a drain; when the eleventh switch device M10 is an N-type MOS tube, the first end of the eleventh switch device M10 is a gate, the second end of the eleventh switch device M10 is a drain, and the third end of the eleventh switch device M10 is a source; when the twelfth switch device M8 is an N-type MOS tube, the first end of the twelfth switch device M8 is a gate, the second end of the twelfth switch device M8 is a drain, and the third end of the twelfth switch device M8 is a source.

[0132] Among them, Figure 5 As shown, the voltages of the second end of the twelfth switch device M8 and the second output end of the control circuit 101 are both vbiasn, that is, the two branches in the drive circuit 10 generated by the replication of vbiasn are mirrored in proportion, so that the loop equation of the feedback circuit 102 has a unique solution, that is, Figure 5 The source voltages of the P-type MOS tubes (the fourth switch device M2 and the fifth switch device M3) with vbiasp_fb as the gate voltage must be equal, that is, vdout=dout_fb; wherein the current loop of the driving circuit 10 can refer to Figure 7 , Figure 7 The present invention discloses a current loop schematic diagram of a driving circuit based on slope control and amplitude control, and Figure 6 , the loop equation is derived as follows:

[0133] M1 and M2 are on the same branch. M2 =I M1 , and M1, M8, M7, M6, M5, M4, and M3 are on a current mirror path. By reasonably setting the size of each MOS tube, I M3 =N*I M1 ;

[0134] If (w / l) M3 =N*(w / l) M2 , according to the square rate formula: I = K*(w / l)*(Vgs-Vth) 2 , we can get: Vgs M2 =Vgs M3 , that is, vdout = dout_fb.

[0135] Among them, Figure 5As shown, vbiasn can be adjusted to control the conduction degree of M8, thereby adjusting the slope of the control signal flowing through the pre-driver circuit 103.

[0136] It can be seen that this optional embodiment can introduce a second reference signal for adjusting the slope and a loop current of a feedback loop by setting a signal adjustment module, thereby adaptively adjusting the slope of the received control signal, thereby improving the flexibility of adjusting the slope of the control signal, and thus facilitating the pre-drive circuit to output the second control signal to the drive circuit more accurately, thereby facilitating improving the adjustment flexibility and accuracy of the drive signal output by the drive circuit.

[0137] In yet another optional embodiment, Figure 4 As shown, the driving circuit 104 includes a second push-pull module 1041 and an impedance matching module 1042, wherein:

[0138] The input end of the second push-pull module 1041 is electrically connected to the output end of the pre-driving circuit 103, and the output end of the second push-pull module 1041 is electrically connected to the feedback input end of the feedback circuit 102 and the first end of the impedance matching module 1042 respectively. The power supply end of the second push-pull module 1041 is used to connect to the power supply, and the ground end of the second push-pull module 1041 is used for grounding; the second end of the impedance matching module 1042 is used to connect to the load.

[0139] In this optional embodiment, optionally, as Figure 5 As shown, the second push-pull module 1041 may include a thirteenth switch device M11 and a fourteenth switch device M12, and the impedance matching module 1042 may include an impedance matching resistor R1, wherein:

[0140] The first end of the thirteenth switch device M11 and the first end of the fourteenth switch device M12 are electrically connected to the output end of the pre-driving circuit 103 respectively, the second end of the thirteenth switch device M11 is used to connect to the power supply, the third end of the thirteenth switch device M11 and the second end of the fourteenth switch device M12 are electrically connected to the feedback input end of the feedback circuit 102 and the first end of the impedance matching resistor R1 respectively, the third end of the fourteenth switch device M12 is used to be grounded, and the second end of the impedance matching resistor R1 is used to connect to the load.

[0141] Optionally, the switch devices in this embodiment (such as the thirteenth switch device M11 and the fourteenth switch device M12) may include, but are not limited to, any devices or components such as N-type MOS tubes and P-type MOS tubes that can play an equivalent switch control role. Wherein, illustratively, when the thirteenth switch device M11 is a P-type MOS tube, the first end of the thirteenth switch device M11 is a gate, the second end of the thirteenth switch device M11 is a source, and the third end of the thirteenth switch device M11 is a drain; when the fourteenth switch device M12 is an N-type MOS tube, the first end of the fourteenth switch device M12 is a gate, the second end of the fourteenth switch device M12 is a drain, and the third end of the fourteenth switch device M12 is a source.

[0142] It can be seen that this optional embodiment can, by setting a push-pull module, output the adjusted control signal to the load more stably and stably feed it back to the feedback circuit, thereby improving the output stability of the driving signal; and, by setting an impedance matching module, it can avoid the driving signal from being reflected back to the driving circuit, thereby improving the transmission efficiency of the driving signal and achieving maximum power output.

[0143] The working principle of the driving circuit based on slope control and amplitude control in the embodiment of the present invention is as follows:

[0144] When the voltage amplitude of the driving signal needs to be adjusted, one of the first switches of all the voltage division control units 101112 of the amplitude control circuit 1011 of the control circuit 101 can be selected to be closed, so as to adjust the resistance voltage division of the voltage division adjustment module 10111, and then adjust the input voltage from the voltage division adjustment module 10111 to the voltage following module 101112; if the closed first switch is arranged later in the first switch sequence, the more resistors are connected in series from the power supply to the closed first switch, the larger the resistance value, the larger the corresponding voltage division, so that the input voltage input to the voltage following module 10112 is larger, and then the reference voltage value of the first reference signal stably output by the voltage following module 10112 equal to the input voltage is larger, and then the voltage amplitude of the driving signal whose voltage value is clamped at the reference voltage value through the switch devices M2 and the switch devices M3 of the feedback circuit 102 is larger;

[0145] When the slope of the driving signal needs to be adjusted, at least one second switch can be arbitrarily selected from the slope control circuit 1012 of the control circuit 101 to be closed. If the number of closed second switches is greater, more second switch devices are connected to the circuit, so that the reference current input to the slope control circuit 1012 is greater, so that the current of the second reference signal input by the slope control circuit 1012 to the feedback circuit 102 and the pre-driving circuit 103 is greater, and then the loop current of the feedback circuit 102 is greater, and the slope of the driving signal output by the driving circuit 104 is adjusted;

[0146] After receiving the first control signal, the pre-drive circuit 103 adjusts the conduction degree of the switching device M8 based on the second reference signal for adjusting the slope and the loop current of the feedback circuit 102, thereby adjusting the slope of the first control signal, and outputs the adjusted second control signal to the drive circuit 104. Based on the second control signal, the drive circuit 104 outputs a drive signal to the load through a push-pull structure, and feeds back the corresponding feedback signal to the switching device M3 in the feedback circuit 102, thereby realizing loop feedback adjustment.

[0147] Embodiment 2

[0148] See also Figure 8 , Figure 8 It is a structural schematic diagram of an electronic device disclosed in an embodiment of the present invention, and the electronic product includes a device body and any driving circuit based on slope control and amplitude control in Embodiment 1. And the functions that can be realized by the electronic device include but are not limited to being able to output a driving signal with adjustable slope and stable and adjustable voltage amplitude. It should be noted that for a detailed description of the driving circuit based on slope control and amplitude control, please refer to the specific description of the relevant content in Embodiment 1, which will not be repeated in this embodiment.

[0149] It can be seen that implementation Figure 8The electronic device described can provide a first reference signal for controlling the voltage amplitude of the driving signal to the feedback circuit based on the power supply voltage through the control circuit included in the driving circuit based on slope control and amplitude control, and provide a second reference signal for adjusting the slope of the driving signal to the feedback circuit and the pre-driving circuit based on the reference current, and then clamp the voltage value of the driving signal to the reference voltage value of the first reference signal through the feedback circuit to control the voltage amplitude of the driving signal, and then adjust the slope of the received first control signal and output the second control signal to the driving circuit based on the second reference signal and the loop current of the feedback circuit through the pre-driving circuit, and then output the driving signal to the load according to the second control signal through the driving circuit and feed back the corresponding feedback signal to the feedback system, which can effectively save chip area and external interface resources through a simple circuit structure, which is conducive to reducing the driving cost; at the same time, the adjustment flexibility, adjustment accuracy and stability of the voltage amplitude of the output driving signal are improved, and the adjustment flexibility and adjustment accuracy of the slope of the output driving signal are improved, so that the output accuracy and stability of the driving signal can be improved while improving the chip resource utilization, which is conducive to meeting the application requirements of low power consumption and low EMI driving application scenarios.

[0150] Finally, it should be noted that the driving circuit and electronic device based on slope control and amplitude control disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, which are only used to illustrate the technical solution of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A driving circuit based on slope control and amplitude control, characterized in that: The driving circuit (10) based on slope control and amplitude control comprises a control circuit (101), a feedback circuit (102), a pre-driving circuit (103) and a driving circuit (104), wherein: The input end of the control circuit (101) is used to access a reference current; the first output end of the control circuit (101) is electrically connected to the first control end of the feedback circuit (102); the second output end of the control circuit (101) is electrically connected to the second control end of the feedback circuit (102) and the first input end of the pre-driving circuit (103) respectively; the feedback output end of the feedback circuit (102) is electrically connected to the second input end of the pre-driving circuit (103); the third input end of the pre-driving circuit (103) is used to access a first control signal; the output end of the pre-driving circuit (103) is electrically connected to the input end of the driving circuit (104); the first output end of the driving circuit (104) is electrically connected to the feedback input end of the feedback circuit (102); and the second output end of the driving circuit (104) is used to connect to a load; The power supply end of the control circuit (101), the power supply end of the feedback circuit (102), the power supply end of the pre-driving circuit (103) and the power supply end of the driving circuit (104) are respectively used to connect to a power supply; the grounding end of the control circuit (101), the grounding end of the feedback circuit (102), the grounding end of the pre-driving circuit (103) and the grounding end of the driving circuit (104) are respectively used to be grounded; The control circuit (101) is used to adjust the power supply voltage provided by the power supply, and provide the feedback circuit (102) with a first reference signal obtained by adjustment; and to adjust the received reference current, and provide the feedback circuit (102) and the pre-driving circuit (103) with a second reference signal obtained by adjustment; wherein the first reference signal is used to control the voltage amplitude of the driving signal output by the driving circuit (104) through the feedback circuit (102), and the second reference signal is used to control the slope of the driving signal output by the driving circuit (104) by controlling the loop current of the feedback circuit (102); The feedback circuit (102) is used to clamp the driving voltage value of the driving signal output by the driving circuit (104) to the reference voltage value of the first reference signal, and to adjust the loop current of the feedback circuit (102) based on the second reference signal; The pre-driving circuit (103) is used to receive a first control signal, and based on the second reference signal and the loop current of the feedback circuit (102), adjust the slope of the first control signal, and output the adjusted second control signal to the driving circuit (104); The driving circuit (104) is used to output a driving signal to the load according to the second control signal, and to feed back a feedback signal corresponding to the driving signal to the feedback circuit (102).

2. The driving circuit based on slope control and amplitude control according to claim 1, characterized in that: The control circuit (101) comprises an amplitude control circuit (1011) and a slope control circuit (1012), wherein: The output end of the amplitude control circuit (1011) is electrically connected to the first control end of the feedback circuit (102), and the power supply end of the amplitude control circuit (1011) is used to connect to the power supply; The input end of the slope control circuit (1012) is used to access the reference current, and the output end of the slope control circuit (1012) is electrically connected to the second control end of the feedback circuit (102) and the first input end of the pre-driving circuit (103) respectively; The grounding terminal of the amplitude control circuit (1011) and the grounding terminal of the slope control circuit (1012) are respectively used for grounding.

3. The driving circuit based on slope control and amplitude control according to claim 2, characterized in that: The amplitude control circuit (1011) comprises a voltage division adjustment module (10111) and a voltage follower module (10112), wherein: The first end of the voltage-dividing regulating module (10111) is electrically connected to the first end of the voltage-following module (10112), and the second end of the voltage-following module (10112) is electrically connected to the first control end of the feedback circuit (102); The second end of the voltage-dividing regulating module (10111) and the second end of the voltage-following module (10112) are used to connect to the power supply, and the third end of the voltage-dividing regulating module (10111) is used to be grounded.

4. The driving circuit based on slope control and amplitude control according to claim 3, characterized in that: The voltage division regulating module (10111) comprises a basic voltage division unit (101111) and at least two voltage division control units (101112) arranged in sequence from the power supply to the basic voltage division unit (101111), wherein: For each of the voltage division control units (101112), when the voltage division control unit (101112) is ranked first, the first end of the voltage division control unit (101112) is used to connect to the power supply; when the voltage division control unit (101112) is not ranked first, the first end of the voltage division control unit (101112) is electrically connected to the second end of the voltage division control unit (101112) that is ranked first; when the voltage division control unit (101112) is ranked last, the second end of the voltage division control unit (101112) is electrically connected to the first end of the basic voltage division unit (101111); The third end of each of the voltage division control units (101112) is electrically connected to the first end of the voltage follower module (10112); The second end of the basic voltage dividing unit (101111) is used for grounding.

5. The driving circuit based on slope control and amplitude control according to claim 3, characterized in that: The slope control circuit (1012) comprises at least two current control modules (10121), wherein: The first end of each current control module (10121) is respectively used to access the reference current, the second end of each current control module (10121) is electrically connected to the second control end of the feedback circuit (102) and the first input end of the pre-drive circuit (103), and the third end of each current control module (10121) is used to be grounded.

6. The driving circuit based on slope control and amplitude control according to any one of claims 1 to 5, characterized in that: The feedback circuit (102) comprises a first loop module (1021) and a second loop module (1022), wherein: A first end of the first loop module (1021) is electrically connected to a first output end of the control circuit (101); a second end of the first loop module (1021) is electrically connected to a second output end of the control circuit (101) and a first input end of the pre-driving circuit (103) respectively; a third end of the first loop module (1021) is electrically connected to a first end of the second loop module (1022); and a fourth end of the first loop module (1021) is used for grounding; The second end of the second loop module (1022) is electrically connected to the first output end of the drive circuit (104), the third end of the second loop module (1022) is electrically connected to the second input end of the pre-drive circuit (103), the fourth end of the second loop module (1022) is used to connect to the power supply, and the fifth end of the second loop module (1022) is used to be grounded.

7. The driving circuit based on slope control and amplitude control according to claim 6, characterized in that: The first loop module (1021) comprises a first current mirror unit (10211) and a second current mirror unit (10212), wherein: The first end of the first current mirror unit (10211) is electrically connected to the second output end of the control circuit (101) and the first input end of the pre-driving circuit (103), respectively; the second end of the first current mirror unit (10211) is electrically connected to the first end of the second current mirror unit (10212); the third end of the first current mirror unit (10211) is used for grounding; the second end of the second current mirror unit (10212) is electrically connected to the first output end of the control circuit (101); and the third end of the second current mirror unit (10212) is electrically connected to the first end of the second loop module (1022); And, the second loop module (1022) includes a third current mirror unit (10221), a fourth current mirror unit (10222) and a fifth current mirror unit (10223), wherein: The first end of the third current mirror unit (10221) is electrically connected to the third end of the second current mirror unit (10212); the second end of the third current mirror unit (10221) is electrically connected to the first output end of the drive circuit (104); the third end of the third current mirror unit (10221) is electrically connected to the first end of the fourth current mirror unit (10222); the second end of the fourth current mirror unit (10222) is electrically connected to the first end of the fifth current mirror unit (10223); the third end of the fourth current mirror unit (10222) and the fourth end of the fourth current mirror unit (10222) are used for grounding; the second end of the fifth current mirror unit (10223) is electrically connected to the second input end of the pre-drive circuit (103); the third end of the fifth current mirror unit (10223) and the fourth end of the fifth current mirror unit (10223) are used for connecting to the power supply.

8. The driving circuit based on slope control and amplitude control according to any one of claims 1, 2, 3, 4, 5 and 7, characterized in that: The pre-driving circuit (103) comprises a first push-pull module (1031) and a signal adjustment module (1032), wherein: The first end of the first push-pull module (1031) is used to receive the first control signal, the second end of the first push-pull module (1031) is used to connect to the power supply, the third end of the first push-pull module (1031) is electrically connected to the first end of the signal adjustment module (1032), the feedback output end of the feedback circuit (102), and the input end of the drive circuit (104), respectively, the fourth end of the first push-pull module (1031) is electrically connected to the second end of the signal adjustment module (1032), and the fifth end of the first push-pull module (1031) is used to be grounded; The third end of the signal adjustment module (1032) is electrically connected to the second control end of the feedback circuit (102) and the second output end of the control circuit (101) respectively.

9. The driving circuit based on slope control and amplitude control according to claim 8, characterized in that: The driving circuit (104) comprises a second push-pull module (1041) and an impedance matching module (1042), wherein: The input end of the second push-pull module (1041) is electrically connected to the output end of the pre-driving circuit (103); the output end of the second push-pull module (1041) is electrically connected to the feedback input end of the feedback circuit (102) and the first end of the impedance matching module (1042), respectively; the power supply end of the second push-pull module (1041) is used to connect to the power supply; the grounding end of the second push-pull module (1041) is used to be grounded; and the second end of the impedance matching module (1042) is used to connect to the load.

10. An electronic device, characterized in that: The electronic device comprises a device body and a driving circuit based on slope control and amplitude control as described in any one of claims 1 to 9.

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