Electrostatic discharge protection drive circuit and data transmission device
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ANALOGIX (SHANGHAI) SEMICONDUCTOR CO LTD
- Filing Date
- 2024-12-27
- Publication Date
- 2026-05-21
Smart Images
Figure CN2024143397_21052026_PF_FP_ABST
Abstract
Description
Electrostatic protection drive circuit and data transmission equipment Technical Field
[0001] This disclosure relates to the fields of data transmission and electrostatic discharge (ESD) protection technology, and more specifically, to an ESD protection drive circuit and a data transmission device. Background Technology
[0002] With the increasing informatization of society, data transmission has become an indispensable technology in all industries, and the data transmission rate often determines the efficiency of relevant personnel. However, in order to improve data transmission speed, related technologies often neglect the electrostatic discharge (ESD) protection capability of the drive circuit. This low ESD protection capability in the drive circuit leads to excessive ESD during operation, severely impacting data transmission and even damaging components. Therefore, the low ESD protection capability in the drive circuit results in poor stability and low anti-interference ability, seriously affecting data transmission stability and user experience.
[0003] There is currently no effective solution to the above problems. Summary of the Invention
[0004] This disclosure provides an electrostatic discharge (ESD) protection drive circuit and a data transmission device to at least solve the technical problem of poor stability of drive circuits caused by the low ESD protection capability of drive circuits in related technologies.
[0005] According to one aspect of the present disclosure, an electrostatic discharge (ESD) protection drive circuit is provided, comprising: a first ESD protection branch, a first end of the first ESD protection branch connected to a first output terminal of the drive circuit, a second end of the first ESD protection branch connected to a second output terminal of the drive circuit, and a third end of the first ESD protection branch grounded, the first ESD protection branch being used to eliminate electrostatic discharge returning from the output terminal of the drive circuit; an ESD protection unit, a first end of the ESD protection unit connected to a first input terminal of the drive circuit, a second end of the ESD protection unit connected to a second input terminal of the drive circuit, a third end of the ESD protection unit connected to a fourth end of the first ESD protection branch, a fourth end of the ESD protection unit connected to a fifth end of the first ESD protection branch, and the fifth and sixth ends of the ESD protection unit grounded, the ESD protection unit being used to eliminate undissipated ESD discharge from the first ESD protection branch; and a second ESD protection branch, a first end of the second ESD protection branch connected to a seventh end of the ESD protection unit, a second end of the second ESD protection branch connected to an eighth end of the ESD protection unit, and a third end of the second ESD protection branch grounded, the second ESD protection branch being used to eliminate undissipated ESD discharge from the ESD protection unit.
[0006] Further, the first electrostatic discharge (ESD) protection branch includes: a first inductor, the first end of which is connected to the first output terminal of the drive circuit; a second inductor, the first end of which is connected to the second end of the first inductor, and the second end of which is connected to the third terminal of the ESD protection unit; a third inductor, the first end of which is connected to the second output terminal of the drive circuit; a fourth inductor, the first end of which is connected to the second end of the third inductor, and the second end of which is connected to the fourth terminal of the ESD protection unit; a first clamping circuit, the first end of which is connected to the first and second ends of the second inductor, the second end of which is connected to the first and second ends of the fourth and third inductors, and the third end of which is grounded; wherein, the first, second, third, and fourth inductors are used to absorb the parasitic capacitance generated by the first ESD protection branch.
[0007] Furthermore, the first electrostatic discharge protection branch also includes: a first diode, the anode of which is connected to the first and second terminals of the second inductor, and the cathode of which is connected to the first terminal of the first clamping circuit; a second diode, the anode of which is grounded, and the cathode of which is connected to the first and second terminals of the second inductor; a third diode, the anode of which is connected to the first and second terminals of the fourth inductor, and the cathode of which is connected to the second terminal of the first clamping circuit; and a fourth diode, the anode of which is grounded, and the cathode of which is connected to the first and second terminals of the fourth and third inductors.
[0008] Further, the electrostatic discharge (ESD) protection unit includes: a fifth inductor, the first end of which is connected to the fifth terminal of the ESD protection unit, and the second end of which is connected to the third terminal of the ESD protection unit; a sixth inductor, the first end of which is connected to the sixth terminal of the ESD protection unit, and the second end of which is connected to the fourth terminal of the ESD protection unit; a first resistor, the first end of which is connected to the second terminal of the fifth inductor, and the second end of which is connected to the first terminal of the ESD protection unit; a second resistor, the first end of which is connected to the second terminal of the sixth inductor, and the second end of which is connected to the second terminal of the ESD protection unit; a fifth diode, the anode of which is connected to the second terminal of the first resistor, and the cathode of which is connected to the sixth terminal of the ESD protection unit; and a sixth diode, the anode of which is connected to the second terminal of the second resistor, and the cathode of which is connected to the seventh terminal of the ESD protection unit.
[0009] Furthermore, the circuit also includes: a first switching device, the first end of which is grounded, and the second end of which is connected to the fifth end of the electrostatic protection unit; a second switching device, the first end of which is grounded, and the second end of which is connected to the sixth end of the electrostatic protection unit; a first controller, which is connected to the third end of the first switching device and is used to control the on / off state of the first switching device; and a second controller, which is connected to the third end of the second switching device and is used to control the on / off state of the second switching device.
[0010] Furthermore, the circuit also includes: a third resistor, the first end of which is connected to the second end of the first switching device, and the second end of which is connected to the fifth end of the electrostatic protection unit; and a fourth resistor, the first end of which is connected to the second end of the second switching device, and the second end of which is connected to the sixth end of the electrostatic protection unit.
[0011] Furthermore, impedance matching is performed between each pair of the third resistor, the fourth resistor, the first switching device, and the second switching device.
[0012] Furthermore, the circuit also includes: a third switching device, the first end of which is connected to the first input terminal of the drive circuit, the second end of which is connected to the first terminal of the electrostatic protection unit, and the third terminal of which is grounded; and a fourth switching device, the first end of which is connected to the second input terminal of the drive circuit, the second end of which is connected to the second terminal of the electrostatic protection unit, and the third terminal of which is grounded.
[0013] Furthermore, the second electrostatic protection branch is a second clamping circuit.
[0014] According to another aspect of the embodiments of this disclosure, a data transmission device is also provided, the device including: the electrostatic discharge protection drive circuit of various embodiments of this disclosure.
[0015] In this embodiment of the disclosure, an electrostatic discharge (ESD) protection drive circuit is provided. The circuit includes: a first ESD protection branch, a first end of which is connected to a first output terminal of the drive circuit, a second end of which is connected to a second output terminal of the drive circuit, and a third end of which is grounded; an ESD protection unit, a first end of which is connected to a first input terminal of the drive circuit, a second end of which is connected to a second input terminal of the drive circuit, a third end of which is connected to a fourth end of the first ESD protection branch, a fourth end of which is connected to a fifth end of the first ESD protection branch, and a fifth and a sixth end of which are grounded; and a second ESD protection branch, a first end of which is connected to a seventh end of the ESD protection unit, a second end of which is connected to an eighth end of the ESD protection unit, and a third end of which is grounded. In this application, a first electrostatic discharge protection branch is set up to eliminate electrostatic discharge returned from the output terminal of the drive circuit. If the first electrostatic discharge protection branch cannot completely eliminate the electrostatic discharge, an electrostatic discharge protection unit is set up to eliminate the electrostatic discharge that the first electrostatic discharge protection unit has not consumed. If the electrostatic discharge protection unit still has not consumed the electrostatic discharge, a second electrostatic discharge protection branch is set up to eliminate the electrostatic discharge that the electrostatic discharge protection unit has not consumed. This allows the electrostatic discharge protection circuit provided in this application to fully consume the electrostatic discharge in the drive circuit, thereby improving the electrostatic protection capability of the drive circuit and achieving the technical effect of improving the stability of the drive circuit. This solves the technical problem of poor stability of the drive circuit caused by the low electrostatic protection capability of the drive circuit in related technologies. Attached Figure Description
[0016] The accompanying drawings, which are included to provide a further understanding of this disclosure and form part of this application, illustrate exemplary embodiments of this disclosure and are used to explain this disclosure, but do not constitute an undue limitation of this disclosure. In the drawings:
[0017] Figure 1 is a schematic diagram of an optional electrostatic protection drive circuit according to an embodiment of the present disclosure;
[0018] Figure 2 is a schematic diagram of an optional first electrostatic protection branch according to an embodiment of the present disclosure;
[0019] Figure 3 is a schematic diagram of a preferred first electrostatic protection branch according to an embodiment of the present disclosure;
[0020] Figure 4 is a schematic diagram of an optional electrostatic protection unit according to an embodiment of the present disclosure;
[0021] Figure 5 is a schematic diagram of a preferred electrostatic protection drive circuit according to an embodiment of the present disclosure.
[0022] The above-mentioned figures include the following reference numerals: 11, first electrostatic protection branch; 12, electrostatic protection unit; 13, second electrostatic protection branch; 111, first output terminal of the drive circuit; 112, second output terminal of the drive circuit; 121, first input terminal of the drive circuit; 122, second input terminal of the drive circuit; 21, first clamping circuit; 211, first inductor; 212, second inductor; 213, third inductor; 214, fourth inductor; 311, first diode; 312, second diode; 313, third diode; 314, fourth diode; 411, first resistor; 412, second resistor; 413, fifth diode; 414, sixth diode; 415, fifth inductor; 416, sixth inductor; 511, first switching device; 512, second switching device; 513, first controller; 514, second controller; 515, third resistor; 516, fourth resistor; 517, third switching device; 518, fourth switching device. Detailed Implementation
[0023] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present disclosure will now be described in detail with reference to the accompanying drawings and embodiments.
[0024] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0025] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.
[0026] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.
[0027] Figure 1 is a schematic diagram of an optional electrostatic discharge (ESD) protection drive circuit according to an embodiment of the present disclosure. Referring to Figure 1, according to a specific embodiment of the present application, an ESD protection drive circuit is provided. This circuit includes: a first ESD protection branch 11, a first end of which is connected to a first output terminal 111 of the drive circuit, a second end of which is connected to a second output terminal 112 of the drive circuit, and a third end of which is grounded. The first ESD protection branch 11 is used to eliminate electrostatic discharge returning from the output terminal of the drive circuit; and an ESD protection unit 12, a first end of which is connected to a first input terminal 121 of the drive circuit, and a second end of which is connected to a second input terminal 112 of the drive circuit. Input terminal 122 is connected, the third terminal of electrostatic discharge protection unit 12 is connected to the fourth terminal of the first electrostatic discharge protection branch 11, the fourth terminal of electrostatic discharge protection unit 12 is connected to the fifth terminal of the first electrostatic discharge protection branch 11, the fifth terminal and the sixth terminal of electrostatic discharge protection unit 12 are grounded, and electrostatic discharge protection unit 12 is used to eliminate the electrostatic discharge that has not been consumed by the first electrostatic discharge protection branch 11; second electrostatic discharge protection branch 13, the first terminal of the second electrostatic discharge protection branch 13 is connected to the seventh terminal of electrostatic discharge protection unit 12, the second terminal of the second electrostatic discharge protection branch 13 is connected to the eighth terminal of electrostatic discharge protection unit 12, the third terminal of the second electrostatic discharge protection branch 13 is grounded, and second electrostatic discharge protection branch 13 is used to eliminate the electrostatic discharge that has not been consumed by electrostatic discharge protection unit 12.
[0028] The aforementioned driving circuit refers to a circuit that controls and drives other electronic components or devices. In this application, the aforementioned driving circuit refers to a circuit used to drive devices to transmit data. During operation, the aforementioned driving circuit will return electrostatic discharge from its output terminal, which will affect the performance and stability of the driving circuit.
[0029] The aforementioned electrostatic discharge protection refers to measures to eliminate electrostatic discharge in the aforementioned drive circuit in order to reduce the damage caused by electrostatic discharge to other electronic devices in the aforementioned drive circuit. In this application, electrostatic discharge returned from the output terminal of the drive circuit is eliminated by setting a first electrostatic protection branch, an electrostatic protection unit, and a second electrostatic protection branch to provide electrostatic protection for the aforementioned drive circuit.
[0030] The aforementioned first electrostatic discharge protection branch refers to a circuit connected to the output terminal of the aforementioned drive circuit for eliminating electrostatic discharge returning from the output terminal of the drive circuit. The aforementioned first electrostatic discharge protection branch can be a clamping circuit, a resistor-capacitor absorption network (RC absorption network for short) or an electrostatic discharge protection chip (ESD protection chip for short), etc. In this application, the aforementioned first electrostatic discharge protection branch can be a circuit composed of an inductor and a clamping circuit for eliminating electrostatic discharge returning from the output terminal of the drive circuit.
[0031] The aforementioned electrostatic discharge (ESD) protection unit refers to a circuit connected to the aforementioned first ESD protection branch for eliminating the ESD discharge that the first ESD protection branch has not completely consumed. When the ESD discharge in the drive circuit cannot be completely consumed by the aforementioned first ESD protection branch, the remaining ESD discharge will be input to the aforementioned ESD protection unit through the fourth and fifth terminals of the first ESD protection branch, and the ESD protection unit will consume the ESD discharge that the first ESD protection branch has not completely consumed. The aforementioned ESD protection unit can be: a circuit equipped with a transient voltage suppression diode, a circuit equipped with a varistor, a circuit equipped with a gas discharge tube, a circuit equipped with an ESD protection chip, or a resistor-capacitor absorption network, etc. In this application, the aforementioned ESD protection unit is a circuit composed of an inductor, a resistor, and a diode for eliminating the ESD discharge that the first ESD protection branch has not completely consumed.
[0032] The aforementioned second electrostatic discharge (ESD) protection branch refers to a circuit connected to the aforementioned ESD protection unit for eliminating any remaining ESD discharge that the ESD protection unit has not consumed. When the ESD discharge in the drive circuit is eliminated by the aforementioned first ESD protection branch and the aforementioned ESD protection unit, if some ESD remains, this remaining ESD will be transmitted to the aforementioned second ESD protection branch through the seventh and eighth terminals of the aforementioned ESD protection unit, where it will be eliminated. The aforementioned second ESD protection branch can be a clamping circuit, a resistor-capacitor absorption network, or an ESD protection chip, etc. In this application, the aforementioned second ESD protection branch can be a clamping circuit.
[0033] In one optional embodiment, the electrostatic discharge (ESD) protection drive circuit can use a circuit composed of an inductor and a clamping circuit as a first ESD protection branch, a circuit composed of an inductor, a resistor, and a diode as an ESD protection unit, and a clamping circuit as a second ESD protection branch; the first end of the first ESD protection branch is connected to the first output terminal of the drive circuit, the second end of the first ESD protection branch is connected to the second output terminal of the drive circuit, the first end of the ESD protection unit is connected to the first input terminal of the drive circuit, the second end of the ESD protection unit is connected to the second input terminal of the drive circuit, the third end of the ESD protection unit is connected to the fourth end of the first ESD protection branch, the fourth end of the ESD protection unit is connected to the fifth end of the first ESD protection branch, the fifth end and the sixth end of the ESD protection unit are grounded, the first end of the second ESD protection branch is connected to the seventh end of the ESD protection unit, the second end of the second ESD protection branch is connected to the eighth end of the ESD protection unit, and the third end of the second ESD protection branch is grounded. In this application, the electrostatic discharge returned from the output of the drive circuit is first input into the first electrostatic protection branch through the first terminal and the second terminal of the first electrostatic protection branch. The first electrostatic protection branch eliminates the electrostatic discharge. When the first electrostatic protection branch cannot completely consume the electrostatic discharge, the remaining electrostatic discharge flows into the third terminal and the fourth terminal of the electrostatic protection unit through the fourth terminal and the fifth terminal of the first electrostatic protection branch, respectively. After receiving the remaining electrostatic discharge, the electrostatic protection unit consumes the remaining electrostatic discharge. When the electrostatic protection unit cannot completely consume the remaining electrostatic discharge, the residual electrostatic discharge needs to be eliminated through the second electrostatic protection branch. The residual electrostatic discharge flows into the first terminal and the second terminal of the second electrostatic protection branch through the seventh terminal and the eighth terminal of the electrostatic protection unit, respectively. After receiving the residual electrostatic discharge, the second electrostatic protection branch eliminates the residual electrostatic discharge.
[0034] In another optional embodiment, the electrostatic discharge (ESD) protection drive circuit may also use a resistor-capacitor absorption network as the first ESD protection branch, a circuit with a transient voltage suppression diode as the ESD protection unit, and an ESD protection chip as the second ESD protection branch. The first end of the first ESD protection branch is connected to the first output terminal of the drive circuit, the second end of the first ESD protection branch is connected to the second output terminal of the drive circuit, the first end of the ESD protection unit is connected to the first input terminal of the drive circuit, the second end of the ESD protection unit is connected to the second input terminal of the drive circuit, the third end of the ESD protection unit is connected to the fourth end of the first ESD protection branch, the fourth end of the ESD protection unit is connected to the fifth end of the first ESD protection branch, the fifth and sixth ends of the ESD protection unit are grounded, the first end of the second ESD protection branch is connected to the seventh end of the ESD protection unit, the second end of the second ESD protection branch is connected to the eighth end of the ESD protection unit, and the third end of the second ESD protection branch is grounded. In this application, the electrostatic discharge returned from the output of the drive circuit is first input into the first electrostatic protection branch through the first terminal and the second terminal of the first electrostatic protection branch. The first electrostatic protection branch eliminates the electrostatic discharge. When the first electrostatic protection branch cannot completely consume the electrostatic discharge, the remaining electrostatic discharge flows into the third terminal and the fourth terminal of the electrostatic protection unit through the fourth terminal and the fifth terminal of the first electrostatic protection branch, respectively. After receiving the remaining electrostatic discharge, the electrostatic protection unit consumes the remaining electrostatic discharge. When the electrostatic protection unit cannot completely consume the remaining electrostatic discharge, the residual electrostatic discharge needs to be eliminated through the second electrostatic protection branch. The residual electrostatic discharge flows into the first terminal and the second terminal of the second electrostatic protection branch through the seventh terminal and the eighth terminal of the electrostatic protection unit, respectively. After receiving the residual electrostatic discharge, the second electrostatic protection branch eliminates the residual electrostatic discharge.
[0035] In another optional embodiment, a clamping circuit can be used as the first electrostatic discharge (ESD) protection branch, and a circuit equipped with a gas discharge tube can be used as the ESD protection unit. A clamping circuit can also be used as the second ESD protection branch. The first end of the first ESD protection branch is connected to the first output terminal of the drive circuit, and the second end of the first ESD protection branch is connected to the second output terminal of the drive circuit. The first end of the ESD protection unit is connected to the first input terminal of the drive circuit, and the second end of the ESD protection unit is connected to the second input terminal of the drive circuit. The third end of the ESD protection unit is connected to the fourth end of the first ESD protection branch, and the fourth end of the ESD protection unit is connected to the fifth end of the first ESD protection branch. The fifth and sixth ends of the ESD protection unit are grounded. The first end of the second ESD protection branch is connected to the seventh end of the ESD protection unit, and the second end of the second ESD protection branch is connected to the eighth end of the ESD protection unit. The third end of the second ESD protection branch is grounded. In this application, the electrostatic discharge returned from the output of the drive circuit is first input into the first electrostatic protection branch through the first terminal and the second terminal of the first electrostatic protection branch. The first electrostatic protection branch eliminates the electrostatic discharge. When the first electrostatic protection branch cannot completely consume the electrostatic discharge, the remaining electrostatic discharge flows into the third terminal and the fourth terminal of the electrostatic protection unit through the fourth terminal and the fifth terminal of the first electrostatic protection branch, respectively. After receiving the remaining electrostatic discharge, the electrostatic protection unit consumes the remaining electrostatic discharge. When the electrostatic protection unit cannot completely consume the remaining electrostatic discharge, the residual electrostatic discharge needs to be eliminated through the second electrostatic protection branch. The residual electrostatic discharge flows into the first terminal and the second terminal of the second electrostatic protection branch through the seventh terminal and the eighth terminal of the electrostatic protection unit, respectively. After receiving the residual electrostatic discharge, the second electrostatic protection branch eliminates the residual electrostatic discharge.
[0036] In this application, by setting up a first electrostatic discharge protection branch, an electrostatic discharge protection unit, and a second electrostatic discharge protection branch, when the electrostatic discharge is large, it is first eliminated through the first electrostatic discharge protection branch. When the first electrostatic discharge protection branch cannot completely consume the electrostatic discharge, the electrostatic discharge protection unit eliminates the electrostatic discharge. When the electrostatic discharge protection unit also cannot completely consume the electrostatic discharge, the second electrostatic discharge protection branch eliminates the electrostatic discharge until the electrostatic discharge is completely consumed. This effectively improves the electrostatic protection capability of the electrostatic discharge protection drive circuit, enhances the stability of the drive circuit, and improves the user experience.
[0037] The circuit described above includes: a first electrostatic discharge (ESD) protection branch, with its first end connected to the first output terminal of the drive circuit, its second end connected to the second output terminal of the drive circuit, and its third end grounded; an ESD protection unit, with its first end connected to the first input terminal of the drive circuit, its second end connected to the second input terminal of the drive circuit, its third end connected to the fourth end of the first ESD protection branch, its fourth end connected to the fifth end of the first ESD protection branch, and its fifth and sixth ends grounded; and a second ESD protection branch, with its first end connected to the seventh end of the ESD protection unit, its second end connected to the eighth end of the ESD protection unit, and its third end grounded. In this application, a first electrostatic discharge protection branch is set up to eliminate electrostatic discharge returned from the output terminal of the drive circuit. If the first electrostatic discharge protection branch cannot completely eliminate the electrostatic discharge, an electrostatic discharge protection unit is set up to eliminate the electrostatic discharge that the first electrostatic discharge protection unit has not consumed. If the electrostatic discharge protection unit still has not consumed the electrostatic discharge, a second electrostatic discharge protection branch is set up to eliminate the electrostatic discharge that the electrostatic discharge protection unit has not consumed. This allows the electrostatic discharge protection circuit provided in this application to fully consume the electrostatic discharge in the drive circuit, thereby improving the electrostatic protection capability of the drive circuit and achieving the technical effect of improving the stability of the drive circuit. This solves the technical problem of poor stability of the drive circuit caused by the low electrostatic protection capability of the drive circuit in related technologies.
[0038] Optionally, the first electrostatic discharge (ESD) protection branch includes: a first inductor, the first end of which is connected to the first output terminal of the drive circuit; a second inductor, the first end of which is connected to the second end of the first inductor, and the second end of which is connected to the third terminal of the ESD protection unit; a third inductor, the first end of which is connected to the second output terminal of the drive circuit; a fourth inductor, the first end of which is connected to the second end of the third inductor, and the second end of which is connected to the fourth terminal of the ESD protection unit; and a first clamping circuit, the first end of which is connected to the first and second ends of the second inductor, the second end of which is connected to the first and second ends of the fourth and third inductors, and the third end of which is grounded; wherein the first, second, third, and fourth inductors are used to absorb the parasitic capacitance generated by the first ESD protection branch.
[0039] The parasitic capacitance mentioned above refers to the non-ideal capacitance formed due to the proximity of conductors in a circuit, or the coupling between a conductor and ground or other conductors. In this application, since the first electrostatic protection branch, the electrostatic protection unit, and the second electrostatic protection branch introduce a large amount of parasitic capacitance, it is necessary to use the first inductor, the second inductor, the third inductor, and the fourth inductor to absorb the parasitic capacitance.
[0040] In an optional embodiment, FIG2 is a schematic diagram of an optional first electrostatic discharge (ESD) protection branch according to an embodiment of the present disclosure. As shown in FIG2, the first ESD protection branch includes: a first inductor 211, a second inductor 212, a third inductor 213, a fourth inductor 214, and a first clamping circuit 21. The first end of the first inductor 211 is connected to the first output terminal 111 of the driving circuit, the second end of the first inductor 211 is connected to the first end of the second inductor 212, the second end of the second inductor 212 is connected to the third end of the ESD protection unit 12, the first end of the third inductor 213 is connected to the second output terminal 112 of the driving circuit, the second end of the third inductor 213 is connected to the first end of the fourth inductor 214, and the second end of the fourth inductor 214 is connected to the fourth end of the ESD protection unit 12. The first terminal of the first clamping circuit 21 is connected to the first terminal of the second inductor 212 and the second terminal of the first inductor 211. The second terminal of the first clamping circuit 21 is connected to the second terminal of the third inductor 213 and the first terminal of the fourth inductor 214. The third terminal of the first clamping circuit 21 is grounded. When the first output terminal 111 of the drive circuit returns to electrostatic discharge, the electrostatic discharge flows through the first terminal of the first inductor 211 and into the first clamping circuit 21 from the second terminal of the first inductor 211. When the second output terminal 112 of the drive circuit returns to electrostatic discharge, the electrostatic discharge flows through the first terminal of the third inductor 213 and into the first clamping circuit 21 from the second terminal of the third inductor 213. The first clamping circuit 21 eliminates the electrostatic discharge. If the first clamping circuit cannot completely consume the electrostatic discharge, the remaining electrostatic discharge flows into the third terminal and the fourth terminal of the electrostatic protection unit 12 through the second terminal of the second inductor 212 and the second terminal of the fourth inductor 214, respectively. The electrostatic discharge (ESD) protection unit 12 eliminates the remaining ESD. The first end of the ESD protection unit 12 is connected to the first input terminal 121 of the drive circuit, and the second end of the ESD protection unit 12 is connected to the second input terminal 122 of the drive circuit. The first end of the second ESD protection branch 13 is connected to the seventh end of the ESD protection unit 12, and the second end of the second ESD protection branch 13 is connected to the eighth end of the ESD protection unit 12. When the ESD protection unit 12 cannot completely consume the remaining ESD, the residual ESD is transported to the second ESD protection branch 13 through the seventh and eighth ends of the ESD protection unit 12, respectively, where it is consumed. Because of the first ESD protection branch, the ESD protection unit 12, and the second ESD protection branch 13, a large parasitic capacitance is introduced into the drive circuit. This parasitic capacitance is consumed by forming a T-shaped filter structure with the first inductor 211 and the second inductor 212, and by forming a T-shaped filter structure with the third inductor 213 and the fourth inductor 214.
[0041] In this application, by setting a first inductor, a second inductor, a third inductor, and a fourth inductor to eliminate parasitic capacitance in the first electrostatic protection branch, the data transmission speed is effectively improved, the stability of the drive circuit is enhanced, and the user experience is improved.
[0042] Optionally, the first electrostatic discharge protection branch further includes: a first diode, the anode of which is connected to the first and second terminals of the second inductor, and the cathode of which is connected to the first terminal of the first clamping circuit; a second diode, the anode of which is grounded, and the cathode of which is connected to the first and second terminals of the second inductor; a third diode, the anode of which is connected to the first and second terminals of the fourth inductor, and the cathode of which is connected to the second terminal of the first clamping circuit; and a fourth diode, the anode of which is grounded, and the cathode of which is connected to the first and second terminals of the fourth and third inductors.
[0043] In an optional embodiment, FIG3 is a schematic diagram of a preferred first electrostatic discharge (ESD) protection branch according to an embodiment of the present disclosure. As shown in FIG3, the first ESD protection branch further includes: a first diode 311, a second diode 312, a third diode 313, and a fourth diode 314. The anode of the first diode 311 is connected to the first terminal of the second inductor 212 and the second terminal of the first inductor 211, and the cathode of the first diode 311 is connected to the first terminal of the first clamping circuit 21. The anode of the second diode 312 is grounded, and the cathode of the second diode 312 is connected to the first terminal of the second inductor 212 and the second terminal of the first inductor 211. The anode of the third diode 313 is connected to the first terminal of the fourth inductor 214 and the second terminal of the third inductor 213, and the cathode of the third diode 313 is connected to the second terminal of the first clamping circuit 21. The anode of the fourth diode 314 is grounded, and the cathode of the fourth diode 314 is connected to the first terminal of the fourth inductor 214 and the second terminal of the third inductor 213. When the first output terminal 111 of the drive circuit returns to electrostatic discharge, the electrostatic discharge flows through the first terminal of the first inductor 211, then flows from the second terminal of the first inductor 211 into the positive terminal of the first diode 311, and then flows through the negative terminal of the first diode 311 into the first clamping circuit 21. When the second output terminal 112 of the drive circuit returns to electrostatic discharge, the electrostatic discharge flows through the first terminal of the third inductor 213, then flows from the second terminal of the third inductor 213 into the positive terminal of the third diode 313, and then flows through the negative terminal of the third diode 313 into the first clamping circuit 21. The first clamping circuit 21 eliminates the electrostatic discharge. If the first clamping circuit cannot completely consume the electrostatic discharge, the remaining electrostatic discharge flows through the second terminal of the second inductor 212 and the second terminal of the fourth inductor 214 into the third and fourth terminals of the electrostatic protection unit 12, respectively. The electrostatic discharge protection unit 12 eliminates the remaining electrostatic discharge. The first end of the electrostatic discharge protection unit 12 is connected to the first input terminal 121 of the drive circuit, and the second end of the electrostatic discharge protection unit 12 is connected to the second input terminal 122 of the drive circuit. The first end of the second electrostatic discharge protection branch 13 is connected to the seventh end of the electrostatic discharge protection unit 12, and the second end of the second electrostatic discharge protection branch 13 is connected to the eighth end of the electrostatic discharge protection unit 12. When the electrostatic discharge protection unit 12 cannot completely consume the remaining electrostatic discharge, the remaining electrostatic discharge is transported to the second electrostatic discharge protection branch 13 through the seventh end and the eighth end of the electrostatic discharge protection unit 12, respectively, and the remaining electrostatic discharge is consumed by the second electrostatic discharge protection branch 13.
[0044] In this application, by setting a first diode and a third diode, the electrostatic discharge in the drive circuit is directed to the first clamping circuit and the electrostatic discharge backflow is prevented. By setting a second diode and a fourth diode, the electrostatic discharge is prevented from directly reaching the ground, which effectively improves the stability of the first electrostatic protection branch, improves the stability of the electrostatic protection drive circuit, and enhances the user experience.
[0045] Optionally, the electrostatic discharge (ESD) protection unit includes: a fifth inductor, the first end of which is connected to the fifth terminal of the ESD protection unit, and the second end of which is connected to the third terminal of the ESD protection unit; a sixth inductor, the first end of which is connected to the sixth terminal of the ESD protection unit, and the second end of which is connected to the fourth terminal of the ESD protection unit; a first resistor, the first end of which is connected to the second terminal of the fifth inductor, and the second end of which is connected to the first terminal of the ESD protection unit; a second resistor, the first end of which is connected to the second terminal of the sixth inductor, and the second end of which is connected to the second terminal of the ESD protection unit; a fifth diode, the anode of which is connected to the second terminal of the first resistor, and the cathode of which is connected to the sixth terminal of the ESD protection unit; and a sixth diode, the anode of which is connected to the second terminal of the second resistor, and the cathode of which is connected to the seventh terminal of the ESD protection unit.
[0046] In an optional embodiment, FIG4 is a schematic diagram of an optional electrostatic discharge (ESD) protection unit according to an embodiment of the present disclosure. As shown in FIG4, the ESD protection unit includes: a fifth inductor 415, a sixth inductor 416, a first resistor 411, a second resistor 412, a fifth diode 413, and a sixth diode 414. The first end of the fifth inductor 415 is connected to the fifth end of the ESD protection unit, and the second end of the fifth inductor 415 is connected to the third end of the ESD protection unit. The first end of the sixth inductor 416 is connected to the sixth end of the ESD protection unit, and the second end of the sixth inductor 416 is connected to the fourth end of the ESD protection unit. The first terminal of the first resistor 411 is connected to the second terminal of the fifth inductor 415, and the second terminal of the first resistor 411 is connected to the first terminal of the electrostatic protection unit. The first terminal of the second resistor 412 is connected to the second terminal of the sixth inductor 416, and the second terminal of the second resistor 412 is connected to the second terminal of the electrostatic protection unit. The positive terminal of the fifth diode 413 is connected to the second terminal of the first resistor 411, and the negative terminal of the fifth diode 413 is connected to the sixth terminal of the electrostatic protection unit. The positive terminal of the sixth diode 414 is connected to the second terminal of the second resistor 412, and the negative terminal of the sixth diode 414 is connected to the seventh terminal of the electrostatic protection unit. When the first output terminal 111 of the drive circuit returns to electrostatic discharge, the electrostatic discharge flows through the first terminal of the first inductor 211, then flows from the second terminal of the first inductor 211 into the positive terminal of the first diode 311, and then flows through the negative terminal of the first diode 311 into the first clamping circuit 21. When the second output terminal 112 of the drive circuit returns to electrostatic discharge, the electrostatic discharge flows through the first terminal of the third inductor 213, then flows from the second terminal of the third inductor 213 into the positive terminal of the third diode 313, and then flows through the negative terminal of the third diode 313 into the first clamping circuit 21. The first clamping circuit 21 eliminates the electrostatic discharge. If the first clamping circuit cannot completely consume the electrostatic discharge, the remaining electrostatic discharge flows through the second terminal of the second inductor 212 and the second terminal of the fourth inductor 214 into the third and fourth terminals of the electrostatic protection unit, respectively. The remaining electrostatic discharge flows into the first terminal of the first resistor 411 and the first terminal of the second resistor 412 through the third and fourth terminals of the electrostatic protection unit, respectively. The first resistor 411 and the fifth diode 413 are used to eliminate the remaining electrostatic discharge, and the second resistor 412 and the sixth diode 414 are used to eliminate the remaining electrostatic discharge. The remaining electrostatic discharge flows into the positive terminal of the fifth diode 413 through the second terminal of the first resistor 411, and also flows into the positive terminal of the sixth diode 414 through the second terminal of the second resistor 412. When the electrostatic protection unit cannot completely consume the remaining electrostatic discharge, the residual electrostatic discharge flows into the second electrostatic protection branch 13 through the negative terminals of the fifth diode 413 and the sixth diode 414, respectively, where the residual electrostatic discharge is consumed.Among them, the fifth inductor 415 and the second inductor 212 form a T-shaped structure, and the sixth inductor 416 and the fourth inductor 214 are used to eliminate parasitic capacitance in the electrostatic protection unit.
[0047] In this application, parasitic capacitance in the electrostatic discharge protection unit is eliminated by setting a fifth inductor and a sixth inductor, and the remaining electrostatic discharge is eliminated by setting a first resistor, a second resistor, a fifth diode, and a sixth diode, which effectively improves the stability and safety of the electrostatic discharge protection drive circuit and enhances the user experience.
[0048] Optionally, the circuit further includes: a first switching device, the first end of which is grounded, and the second end of which is connected to the fifth end of the electrostatic protection unit; a second switching device, the first end of which is grounded, and the second end of which is connected to the sixth end of the electrostatic protection unit; a first controller, which is connected to the third end of the first switching device and is used to control the on / off state of the first switching device; and a second controller, which is connected to the third end of the second switching device and is used to control the on / off state of the second switching device.
[0049] In an optional embodiment, FIG5 is a schematic diagram of a preferred electrostatic discharge (ESD) protection drive circuit according to an embodiment of the present disclosure. As shown in FIG5, the ESD protection drive circuit further includes: a first switching device 511, a second switching device 512, a first controller 513, and a second controller 514. The first terminal of the first switching device 511 is grounded, and the second terminal of the first switching device 511 is connected to the fifth terminal of the ESD protection unit. The first terminal of the second switching device 512 is grounded, and the second terminal of the second switching device 512 is connected to the sixth terminal of the ESD protection unit. The first controller 513 is connected to the third terminal of the first switching device 511, and the second controller 514 is connected to the third terminal of the second switching device 512. The first controller 513 is used to control the on / off state of the first switching device 511, and the second controller 514 is used to control the on / off state of the second switching device 512.
[0050] In this application, by setting up a first switching device, a second switching device, a first controller, and a second controller, the user can control the on / off state of the fifth terminal and the sixth terminal of the electrostatic protection unit according to the needs, so as to control the opening and closing of the electrostatic protection function of the drive circuit, effectively improving the application scenarios of the electrostatic protection drive circuit and enhancing the user experience.
[0051] Optionally, the circuit further includes: a third resistor, the first end of which is connected to the second end of the first switching device, and the second end of which is connected to the fifth end of the electrostatic protection unit; and a fourth resistor, the first end of which is connected to the second end of the second switching device, and the second end of which is connected to the sixth end of the electrostatic protection unit.
[0052] In an optional embodiment, as shown in FIG5, the electrostatic protection drive circuit further includes a third resistor 515 and a fourth resistor 516. The first end of the third resistor 515 is connected to the second end of the first switching device 511, the second end of the third resistor 515 is connected to the fifth end of the electrostatic protection unit, the first end of the fourth resistor 516 is connected to the second end of the second switching device 512, and the second end of the fourth resistor 516 is connected to the sixth end of the electrostatic protection unit.
[0053] Optionally, impedance matching is performed between the third resistor, the fourth resistor, the first switching device, and the second switching device.
[0054] The aforementioned impedance matching refers to the equalization of the input impedance and output impedance of multiple circuit elements connected together. In this application, impedance matching is performed between the third resistor, the fourth resistor, the first switching device, and the second switching device to reduce power loss in the electrostatic protection drive circuit.
[0055] In one alternative embodiment, the third resistor, the fourth resistor, the first switching device, and the second switching device are impedance matched in pairs.
[0056] In this application, by setting the third resistor, the fourth resistor, and impedance matching between the first switch device and the second switch device, the power loss in the electrostatic protection drive circuit is reduced, thereby improving the user experience.
[0057] Optionally, the circuit further includes: a third switching device, the first end of which is connected to the first input terminal of the drive circuit, the second end of which is connected to the first terminal of the electrostatic protection unit, and the third terminal of which is grounded; and a fourth switching device, the first end of which is connected to the second input terminal of the drive circuit, the second end of which is connected to the second terminal of the electrostatic protection unit, and the third terminal of which is grounded.
[0058] In an optional embodiment, as shown in FIG5, the electrostatic discharge protection drive circuit further includes: a third switching device 517 and a fourth switching device 518. The first end of the third switching device 517 is connected to the first input terminal 121 of the drive circuit, the second end of the third switching device 517 is connected to the first end of the electrostatic discharge protection unit, and the third end of the third switching device 517 is grounded. The first end of the fourth switching device 518 is connected to the second input terminal 122 of the drive circuit, the second end of the fourth switching device 518 is connected to the second end of the electrostatic discharge protection unit, and the third end of the fourth switching device 518 is grounded. The first input terminal 121 and the second input terminal 122 of the drive circuit are powered. When the third switching device 517 and the fourth switching device 518 are closed, the drive circuit starts to work. When the first output terminal 111 of the drive circuit returns to electrostatic discharge, the electrostatic discharge flows through the first end of the first inductor 211, flows from the second end of the first inductor 211 into the positive terminal of the first diode 311, and flows into the first clamping circuit 21 through the negative terminal of the first diode 311. When the second output terminal 112 of the drive circuit returns to electrostatic discharge, the electrostatic discharge flows through the first inductor 211, flows through the first inductor 211, flows from the second end of the first inductor 211 into the positive terminal of the first diode 311, and flows into the first clamping circuit 21 through the negative terminal of the first diode 311. During electrostatic discharge, the electrostatic discharge flows through the first terminal of the third inductor 213, then flows from the second terminal of the third inductor 213 into the positive terminal of the third diode 313, and flows through the negative terminal of the third diode 313 into the first clamping circuit 21. The first clamping circuit 21 eliminates the electrostatic discharge. If the first clamping circuit cannot completely consume the electrostatic discharge, the remaining electrostatic discharge flows through the second terminal of the second inductor 212 and the second terminal of the fourth inductor 214 into the third and fourth terminals of the electrostatic protection unit, respectively. The remaining electrostatic discharge flows into the first terminal of the first resistor 411 and the first terminal of the second resistor 412 through the third and fourth terminals of the electrostatic protection unit, respectively. The first resistor 411 and the fifth diode 413 are used to eliminate the remaining electrostatic discharge, and the second resistor 412 and the sixth diode 414 are used to eliminate the remaining electrostatic discharge. The remaining electrostatic discharge flows into the positive terminal of the fifth diode 413 through the second terminal of the first resistor 411, and also flows into the positive terminal of the sixth diode 414 through the second terminal of the second resistor 412. When the electrostatic protection unit cannot completely consume the remaining electrostatic discharge, the residual electrostatic discharge flows into the second electrostatic protection branch 13 through the negative terminals of the fifth diode 413 and the sixth diode 414, respectively, where the residual electrostatic discharge is consumed.
[0059] In this application, by setting a third switch and a fourth switch to control the drive circuit to operate only when the third switch and the fourth switch are closed, the application scenarios of the electrostatic protection drive circuit are effectively expanded, and the user experience is improved.
[0060] Optionally, the second electrostatic protection branch is a second clamping circuit.
[0061] According to another aspect of the present disclosure, a data transmission device is also provided. This device may include the electrostatic discharge protection drive circuit of the above embodiments. The specific implementation method and preferred application scenarios are the same as those of the above embodiments, and will not be repeated here.
[0062] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.
[0063] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this disclosure.
[0064] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.
[0065] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Various modifications and variations can be made to this disclosure by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this disclosure should be included within the scope of protection of this disclosure.
[0066] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.
[0067] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.
[0068] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.
[0069] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this disclosure, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this disclosure. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.
[0070] The above description is only a preferred embodiment of this disclosure. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principles of this disclosure, and these improvements and modifications should also be considered within the scope of protection of this disclosure.
Claims
1. An electrostatic discharge protection drive circuit, comprising: The first electrostatic discharge protection branch has a first end connected to the first output terminal of the drive circuit, a second end connected to the second output terminal of the drive circuit, and a third end grounded. The first electrostatic discharge protection branch is used to eliminate electrostatic discharge returned from the output terminal of the drive circuit. An electrostatic discharge (ESD) protection unit is provided, wherein a first end of the ESD protection unit is connected to a first input terminal of the drive circuit, a second end of the ESD protection unit is connected to a second input terminal of the drive circuit, a third end of the ESD protection unit is connected to a fourth end of the first ESD protection branch, a fourth end of the ESD protection unit is connected to a fifth end of the first ESD protection branch, and the fifth and sixth ends of the ESD protection unit are grounded. The ESD protection unit is used to eliminate the electrostatic discharge that has not been completely consumed by the first ESD protection branch. The second electrostatic discharge protection branch has a first end connected to the seventh end of the electrostatic discharge protection unit, a second end connected to the eighth end of the electrostatic discharge protection unit, and a third end grounded. The second electrostatic discharge protection branch is used to eliminate any remaining electrostatic discharge from the electrostatic discharge protection unit.
2. The electrostatic protection drive circuit according to claim 1, wherein The first electrostatic discharge protection branch includes: A first inductor, the first end of which is connected to the first output terminal of the driving circuit; The second inductor has its first end connected to the second end of the first inductor, and its second end connected to the third end of the electrostatic protection unit. The third inductor, the first end of which is connected to the second output terminal of the driving circuit; A fourth inductor, the first end of which is connected to the second end of the third inductor, and the second end of which is connected to the fourth end of the electrostatic protection unit; A first clamping circuit, wherein a first terminal of the first clamping circuit is connected to a first terminal of the second inductor and a second terminal of the first inductor, a second terminal of the first clamping circuit is connected to a first terminal of the fourth inductor and a second terminal of the third inductor, and a third terminal of the first clamping circuit is grounded; The first inductor, the second inductor, the third inductor, and the fourth inductor are used to absorb the parasitic capacitance generated by the first electrostatic protection branch.
3. The electrostatic discharge protection drive circuit according to claim 2, wherein, The first electrostatic protection branch also includes: The first diode has its anode connected to the first terminal and the second terminal of the second inductor, and its cathode connected to the first terminal of the first clamping circuit. The second diode has its anode grounded and its cathode connected to the first terminal of the second inductor and the second terminal of the first inductor. The third diode, the positive terminal of which is connected to the first terminal and the second terminal of the fourth inductor, and the negative terminal of which is connected to the second terminal of the first clamping circuit; The fourth diode has its positive terminal grounded and its negative terminal connected to the first terminal of the fourth inductor and the second terminal of the third inductor.
4. The electrostatic discharge protection drive circuit according to claim 1, wherein, The electrostatic discharge protection unit includes: The fifth inductor has its first end connected to the fifth end of the electrostatic protection unit, and its second end connected to the third end of the electrostatic protection unit. The sixth inductor has its first end connected to the sixth end of the electrostatic protection unit, and its second end connected to the fourth end of the electrostatic protection unit. A first resistor, the first end of which is connected to the second end of the fifth inductor, and the second end of which is connected to the first end of the electrostatic protection unit; The second resistor has its first end connected to the second end of the sixth inductor, and its second end is connected to the second end of the electrostatic protection unit. The fifth diode has its anode connected to the second terminal of the first resistor and its cathode connected to the sixth terminal of the electrostatic protection unit. The sixth diode has its anode connected to the second terminal of the second resistor and its cathode connected to the seventh terminal of the electrostatic protection unit.
5. The electrostatic discharge protection drive circuit according to claim 1, wherein, Also includes: A first switching device, wherein a first terminal of the first switching device is grounded, and a second terminal of the first switching device is connected to the fifth terminal of the electrostatic protection unit; The second switching device has a first terminal grounded and a second terminal connected to the sixth terminal of the electrostatic protection unit. A first controller is connected to the third terminal of the first switching device and is used to control the on / off state of the first switching device. The second controller is connected to the third terminal of the second switching device and is used to control the on / off state of the second switching device.
6. The electrostatic discharge protection drive circuit according to claim 5, wherein, Also includes: The third resistor has its first end connected to the second end of the first switching device, and its second end connected to the fifth end of the electrostatic protection unit. The fourth resistor has its first end connected to the second end of the second switching device and its second end connected to the sixth end of the electrostatic protection unit.
7. The electrostatic discharge protection drive circuit according to claim 6, wherein, The third resistor, the fourth resistor, the first switching device, and the second switching device are impedance matched in pairs.
8. The electrostatic discharge protection drive circuit according to claim 1, wherein, Also includes: The third switching device has a first end connected to the first input terminal of the driving circuit, a second end connected to the first end of the electrostatic protection unit, and a third end grounded. The fourth switching device has a first end connected to the second input end of the driving circuit, a second end connected to the second end of the electrostatic protection unit, and a third end grounded.
9. The electrostatic discharge protection drive circuit according to claim 1, wherein, The second electrostatic protection branch is the second clamping circuit.
10. A data transmission device, comprising: The electrostatic discharge protection drive circuit according to any one of claims 1 to 9.