阅读说明：本技术 一种平面集成式铁氧体开关驱动器 (Planar integrated ferrite switch driver ) 是由 董睿楠 于 2019-09-24 设计创作，主要内容包括：本发明公开一种平面集成式铁氧体开关驱动器,包括第一三端开关控制器、第二三端开关控制器、第一开关磁化线圈组、第二开关磁化线圈组和电源单元；其中,通过对第一开关磁化线圈组和第二开关磁化线圈组的两种不同串联方式,实现了对不同铁氧体开关内的微波传输方向的多种驱动控制方法,解决传统铁氧体开关驱动器“单结单控”模式造成的开关体积庞大,以及铁氧体开关整机的可靠性低的问题。(The invention discloses a planar integrated ferrite switch driver, which comprises a first three-terminal switch controller, a second three-terminal switch controller, a first switch magnetizing coil group, a second switch magnetizing coil group and a power supply unit, wherein the first switch magnetizing coil group is connected with the second switch magnetizing coil group; the ferrite switch drive device has the advantages that multiple drive control methods for microwave transmission directions in different ferrite switches are realized through two different series connection modes of the first switch magnetizing coil group and the second switch magnetizing coil group, and the problems of large switch size and low reliability of the whole ferrite switch caused by a single-junction single-control mode of a traditional ferrite switch drive are solved.)

1. The planar integrated ferrite switch driver is characterized by comprising a first three-terminal switch controller, a second three-terminal switch controller, a first switch magnetizing coil group, a second switch magnetizing coil group and a power supply unit;

the first switch magnetizing coil group is wound on the first ferrite switch in a penetrating way;

the first switch magnetizing coil group comprises a first magnetizing coil and a second magnetizing coil;

a first magnetizing coil of the first switching magnetizing coil comprises a first end point and a second end point;

the second magnetizing coil of the first switching magnetizing coil comprises a third end point and a fourth end point;

the second switch magnetizing coil group is wound on the second ferrite switch in a penetrating manner;

the second switch magnetizing coil group comprises a first magnetizing coil and a second magnetizing coil;

the first magnetizing coil of the second switching magnetizing coil comprises a fifth endpoint and a sixth endpoint;

the second magnetizing coil of the second switching magnetizing coil comprises a seventh endpoint and an eighth endpoint;

the control end of the first three-terminal switch controller responds to a first control signal;

the control end of the second three-terminal switch controller responds to a second control signal;

the first end of the first three-end switch controller is grounded;

the first end of the second three-end switch controller is grounded;

wherein the content of the first and second substances,

under the condition that the first end point is connected with the second end of the first three-terminal switch controller, the second end point is connected with the fifth end point, the third end point is connected with the power supply unit, the fourth end point is connected with the seventh end point, the sixth end point is connected with the power supply unit, and the eighth end point is connected with the second end of the second three-terminal switch controller,

when the first three-terminal switch controller responds to the first control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along the first direction, the microwave signal in the second ferrite switch is transmitted along the first direction,

when the second three-terminal switch controller responds to a second control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along a second direction, and the microwave signal in the second ferrite switch is transmitted along the second direction;

under the condition that the first end point is connected with the second end of the first three-terminal switch controller, the second end point is connected with the sixth end point, the third end point is connected with the power supply unit, the fourth end point is connected with the eighth end point, the fifth end point is connected with the power supply unit, and the seventh end point is connected with the second end of the second three-terminal switch controller,

when the first three-terminal switch controller responds to the first control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along a first direction, the microwave signal in the second ferrite switch is transmitted along a second direction,

when the second three-terminal switch controller responds to the second control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along the second direction, the microwave signal in the second ferrite switch is transmitted along the first direction,

wherein the first direction is opposite the second direction.

2. The driver of claim 1, further comprising a first monostable unit and a second monostable unit, wherein,

the output end of the first monostable circuit unit is connected with the control end of the first three-terminal switch controller, the input end of the first monostable circuit unit responds to a first control signal,

the first monostable circuit unit is used for controlling the input time of a first control signal;

the output end of the second monostable circuit unit is connected with the control end of the second three-terminal switch controller, the input end of the second monostable circuit unit responds to a second control signal,

the second monostable circuit unit is used for controlling the input time of a second control signal.

3. The driver of claim 2, further comprising a first current amplifier and a second current amplifier, wherein,

the input end of the first current amplifier is connected with the output end of the first monostable one-way unit, the output end of the first current amplifier is connected with the control end of the first three-terminal switch controller,

the first current amplifier is used for increasing the strength of a first control signal;

the input end of the second current amplifier is connected with the output end of the second monostable one-way unit, the output end of the second current amplifier is connected with the control end of the second three-terminal switch controller,

the second current amplifier is used for increasing the strength of the second control signal.

4. The driver of claim 1, further comprising a multi-level logic interconnect printed board;

the multi-level logic interconnection printed board comprises a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, an eighth pin, a ninth pin, a tenth pin and an eleventh pin,

the first end point is connected with the first pin, the second end point is connected with the second pin, the fourth end point is connected with the fourth pin, the fifth end point is connected with the fifth pin, the sixth end point is connected with the sixth pin, the seventh end point is connected with the seventh pin, the eighth end point is connected with the eighth pin, the second end of the first three-terminal switch controller is connected with the ninth pin, the second end of the second three-terminal switch controller is connected with the tenth pin, and the power supply unit is connected with the eleventh pin;

the first pin is conducted with the ninth pin, the second pin is conducted with the fifth pin, the third pin is conducted with the eleventh pin, the fourth pin is conducted with the seventh pin, the sixth pin is conducted with the eleventh pin, and the eighth pin is conducted with the tenth pin;

then when the first three-terminal switch controller is turned on in response to the first control signal, the microwave signal within the first ferrite switch is transmitted in a first direction, the microwave signal within the second ferrite switch is transmitted in the first direction,

when the second three-terminal switch controller is conducted in response to a second control signal, the microwave signal in the first ferrite switch is transmitted along a second direction, the microwave signal in the second ferrite switch is transmitted along the second direction,

wherein the first direction is opposite to the second direction.

5. The driver of claim 1, further comprising a multi-level logic interconnect printed board;

the multi-level logic interconnection printed board comprises a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, an eighth pin, a ninth pin, a tenth pin and an eleventh pin,

the first end point is connected with the first pin, the second end point is connected with the second pin, the fourth end point is connected with the fourth pin, the fifth end point is connected with the fifth pin, the sixth end point is connected with the sixth pin, the seventh end point is connected with the seventh pin, the eighth end point is connected with the eighth pin, the second end of the first three-terminal switch controller is connected with the ninth pin, the second end of the second three-terminal switch controller is connected with the tenth pin, and the power supply unit is connected with the eleventh pin;

the first pin is conducted with the ninth pin, the second pin is conducted with the sixth pin, the third pin is conducted with the eleventh pin, the fourth pin is conducted with the eighth pin, the fifth pin is conducted with the eleventh pin, and the seventh pin is conducted with the tenth pin;

then when said first three terminal switch controller is turned on in response to a first control signal, the microwave signal within said first ferrite switch is transmitted in a first direction and the microwave signal within said second ferrite switch is transmitted in a second direction,

when the second three-terminal switch controller is switched on in response to a second control signal, the microwave signal in the first ferrite switch is transmitted along a second direction, the microwave signal in the second ferrite switch is transmitted along a first direction,

wherein the first direction is opposite to the second direction.

6. The driver of claim 1, wherein the first three-terminal switch controller and the second three-terminal switch controller are both field effect transistors, wherein the control terminal of the first three-terminal switch controller is a gate of a field effect transistor, the control terminal of the second three-terminal switch controller is a gate of a field effect transistor, the first terminal of the first three-terminal switch controller is a source of a field effect transistor, and the first terminal of the second three-terminal switch controller is a source of a field effect transistor; the second end of the first three-terminal switch controller is a drain electrode of the field effect transistor, and the second end of the second three-terminal switch controller is a drain electrode of the field effect transistor.

Technical Field

The invention relates to a ferrite switch driver. And more particularly to a planar integrated ferrite switch driver.

Background

The ferrite switch has the function of changing a microwave signal transmission channel, and is widely applied to the fields of ground, airborne and satellite radars at present. The planar integrated ferrite switch (hereinafter referred to as ferrite switch) is composed of a microwave device and a driver, the microwave device is generally realized by loading a Y-type ferrite junction in a rectangular waveguide, the driver receives a superior control signal and provides excitation for the microwave device through a magnetizing coil penetrating and winding in the Y-type ferrite junction, and the ferrite switch is integrated by a plurality of Y-type ferrite junctions in a planar mode and can realize the polarization function of a plurality of angles.

The traditional planar integrated ferrite switch adopts a unijunction single-control driving mode, namely each Y-type ferrite junction is excited by an independent driving circuit, and the driving mode has the following defects that firstly, along with the increase of the number of driver circuits, the demand of driving circuit components becomes huge, so that the performances in the aspects of product reliability design, including component reliability, electromagnetic compatibility and the like, are reduced in an order of magnitude mode, huge hidden dangers are buried for the product reliability, and simultaneously, the resource waste is caused; secondly, the excessive number of driving circuits leads to the overlarge volume of the product, which conflicts with the miniaturization requirement of the ferrite switch, and brings great inconvenience to the production, assembly, test and the final use of users

Disclosure of Invention

It is an object of the present invention to provide a planar integrated ferrite switch driver.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention provides a planar integrated ferrite switch driver, which comprises a first three-terminal switch controller, a second three-terminal switch controller, a first switch magnetizing coil group, a second switch magnetizing coil group and a power supply unit, wherein the first three-terminal switch controller is connected with the first switch magnetizing coil group;

the first switch magnetizing coil group is wound on the first ferrite switch in a penetrating way;

the first switch magnetizing coil group comprises a first magnetizing coil and a second magnetizing coil;

a first magnetizing coil of the first switching magnetizing coil comprises a first end point and a second end point;

the second magnetizing coil of the first switching magnetizing coil comprises a third end point and a fourth end point;

the second switch magnetizing coil group is wound on the second ferrite switch in a penetrating manner;

the second switch magnetizing coil group comprises a first magnetizing coil and a second magnetizing coil;

the first magnetizing coil of the second switching magnetizing coil comprises a fifth endpoint and a sixth endpoint;

the second magnetizing coil of the second switching magnetizing coil comprises a seventh endpoint and an eighth endpoint;

the control end of the first three-terminal switch controller responds to a first control signal;

the control end of the second three-terminal switch controller responds to a second control signal;

the first end of the first three-end switch controller is grounded;

the first end of the second three-end switch controller is grounded;

wherein the content of the first and second substances,

under the condition that the first end point is connected with the second end of the first three-terminal switch controller, the second end point is connected with the fifth end point, the third end point is connected with the power supply unit, the fourth end point is connected with the seventh end point, the sixth end point is connected with the power supply unit, and the eighth end point is connected with the second end of the second three-terminal switch controller,

when the first three-terminal switch controller responds to the first control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along the first direction, the microwave signal in the second ferrite switch is transmitted along the first direction,

when the second three-terminal switch controller responds to a second control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along a second direction, and the microwave signal in the second ferrite switch is transmitted along the second direction;

under the condition that the first end point is connected with the second end of the first three-terminal switch controller, the second end point is connected with the sixth end point, the third end point is connected with the power supply unit, the fourth end point is connected with the eighth end point, the fifth end point is connected with the power supply unit, and the seventh end point is connected with the second end of the second three-terminal switch controller,

when the first three-terminal switch controller responds to the first control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along a first direction, the microwave signal in the second ferrite switch is transmitted along a second direction,

when the second three-terminal switch controller responds to the second control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along the second direction, the microwave signal in the second ferrite switch is transmitted along the first direction,

wherein the first direction is opposite the second direction.

Optionally, the driver further comprises a first monostable unit and a second monostable unit, wherein,

the output end of the first monostable circuit unit is connected with the control end of the first three-terminal switch controller, the input end of the first monostable circuit unit responds to a first control signal,

the first monostable circuit unit is used for controlling the input time of a first control signal;

the output end of the second monostable circuit unit is connected with the control end of the second three-terminal switch controller, the input end of the second monostable circuit unit responds to a second control signal,

the second monostable circuit unit is used for controlling the input time of a second control signal.

Optionally, the driver further comprises a first current amplifier and a second current amplifier, wherein,

the input end of the first current amplifier is connected with the output end of the first monostable one-way unit, the output end of the first current amplifier is connected with the control end of the first three-terminal switch controller,

the first current amplifier is used for increasing the strength of a first control signal;

the input end of the second current amplifier is connected with the output end of the second monostable one-way unit, the output end of the second current amplifier is connected with the control end of the second three-terminal switch controller,

the second current amplifier is used for increasing the strength of the second control signal.

Optionally, the driver further comprises a multi-stage logic interconnection printed board;

the multi-level logic interconnection printed board comprises a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, an eighth pin, a ninth pin, a tenth pin and an eleventh pin,

the first end point is connected with the first pin, the second end point is connected with the second pin, the fourth end point is connected with the fourth pin, the fifth end point is connected with the fifth pin, the sixth end point is connected with the sixth pin, the seventh end point is connected with the seventh pin, the eighth end point is connected with the eighth pin, the second end of the first three-terminal switch controller is connected with the ninth pin, the second end of the second three-terminal switch controller is connected with the tenth pin, and the power supply unit is connected with the eleventh pin;

the first pin is conducted with the ninth pin, the second pin is conducted with the fifth pin, the third pin is conducted with the eleventh pin, the fourth pin is conducted with the seventh pin, the sixth pin is conducted with the eleventh pin, and the eighth pin is conducted with the tenth pin;

then when the first three-terminal switch controller is turned on in response to the first control signal, the microwave signal within the first ferrite switch is transmitted in a first direction, the microwave signal within the second ferrite switch is transmitted in the first direction,

when the second three-terminal switch controller is conducted in response to a second control signal, the microwave signal in the first ferrite switch is transmitted along a second direction, the microwave signal in the second ferrite switch is transmitted along the second direction,

wherein the first direction is opposite to the second direction.

Optionally, the driver further comprises a multi-stage logic interconnection printed board;

the multi-level logic interconnection printed board comprises a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, an eighth pin, a ninth pin, a tenth pin and an eleventh pin,

the first end point is connected with the first pin, the second end point is connected with the second pin, the fourth end point is connected with the fourth pin, the fifth end point is connected with the fifth pin, the sixth end point is connected with the sixth pin, the seventh end point is connected with the seventh pin, the eighth end point is connected with the eighth pin, the second end of the first three-terminal switch controller is connected with the ninth pin, the second end of the second three-terminal switch controller is connected with the tenth pin, and the power supply unit is connected with the eleventh pin;

the first pin is conducted with the ninth pin, the second pin is conducted with the sixth pin, the third pin is conducted with the eleventh pin, the fourth pin is conducted with the eighth pin, the fifth pin is conducted with the eleventh pin, and the seventh pin is conducted with the tenth pin;

then when said first three terminal switch controller is turned on in response to a first control signal, the microwave signal within said first ferrite switch is transmitted in a first direction and the microwave signal within said second ferrite switch is transmitted in a second direction,

when the second three-terminal switch controller is switched on in response to a second control signal, the microwave signal in the first ferrite switch is transmitted along a second direction, the microwave signal in the second ferrite switch is transmitted along a first direction,

wherein the first direction is opposite to the second direction.

Optionally, the first three-terminal switch controller and the second three-terminal switch controller are both field effect transistors, wherein a control terminal of the first three-terminal switch controller is a gate of a field effect transistor, a control terminal of the second three-terminal switch controller is a gate of a field effect transistor, a first terminal of the first three-terminal switch controller is a source of a field effect transistor, and a first terminal of the second three-terminal switch controller is a source of a field effect transistor; the second end of the first three-terminal switch controller is a drain electrode of the field effect transistor, and the second end of the second three-terminal switch controller is a drain electrode of the field effect transistor.

The invention has the following beneficial effects:

the technical problem to be solved by the invention is to provide a planar integrated ferrite switch driver, which solves the problems of large switch volume and low reliability of the whole ferrite switch caused by a unijunction single control mode of the traditional ferrite switch driver.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 shows a schematic structure diagram of a planar integrated ferrite switch driver according to the present invention.

Fig. 2 shows a winding manner of the switch magnetizing coil and the ferrite switch of the planar integrated ferrite switch driver according to the present invention.

Fig. 3 shows a schematic diagram of a planar integrated ferrite switch driver driving ferrite switches to magnetize in the same direction according to the present invention.

Fig. 4 shows a schematic diagram of a planar integrated ferrite switch driver driving ferrite switches to magnetize in opposite directions according to the present invention.

Detailed Description

In order to make the technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A planar integrated ferrite switch driver as shown in fig. 1, the driver comprising a first three-terminal switch controller, a second three-terminal switch controller, a first switch magnetizing coil set, a second switch magnetizing coil set and a power supply unit;

according to the configuration relationship shown in fig. 2, the first switch magnetizing coil group is threaded on the first ferrite switch;

the first switch magnetizing coil group comprises a first magnetizing coil and a second magnetizing coil;

the first magnetizing coil and the second magnetizing coil of the first switch magnetizing coil group are both U-shaped and respectively penetrate and wind on the first ferrite switch;

a first magnetizing coil of the first switching magnetizing coil comprises a first end point and a second end point;

the second magnetizing coil of the first switching magnetizing coil comprises a third end point and a fourth end point;

the second switch magnetizing coil group is wound on the second ferrite switch in the same way as the first switch magnetizing group and the first ferrite switch,

the second switch magnetizing coil group comprises a first magnetizing coil and a second magnetizing coil;

the first magnetizing coil and the second magnetizing coil of the second switch magnetizing coil group are both U-shaped and respectively penetrate and wind the second ferrite switch;

the second magnetizing coil of the second switching magnetizing coil comprises a seventh endpoint and an eighth endpoint;

the control end of the first three-terminal switch controller responds to a first control signal;

the control end of the second three-terminal switch controller responds to a second control signal;

the first end of the first three-end switch controller is grounded;

the first end of the second three-end switch controller is grounded;

wherein the content of the first and second substances,

under the condition that the first end point is connected with the second end of the first three-terminal switch controller, the second end point is connected with the fifth end point, the third end point is connected with the power supply unit, the fourth end point is connected with the seventh end point, the sixth end point is connected with the power supply unit, and the eighth end point is connected with the second end of the second three-terminal switch controller,

when the first three-terminal switch controller responds to the first control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along the first direction, the microwave signal in the second ferrite switch is transmitted along the first direction,

when the second three-terminal switch controller responds to a second control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along a second direction, and the microwave signal in the second ferrite switch is transmitted along the second direction;

under the condition that the first end point is connected with the second end of the first three-terminal switch controller, the second end point is connected with the sixth end point, the third end point is connected with the power supply unit, the fourth end point is connected with the eighth end point, the fifth end point is connected with the power supply unit, and the seventh end point is connected with the second end of the second three-terminal switch controller,

when the first three-terminal switch controller responds to the first control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along a first direction, the microwave signal in the second ferrite switch is transmitted along a second direction,

when the second three-terminal switch controller responds to the second control signal to be conducted, the microwave signal in the first ferrite switch is transmitted along the second direction, the microwave signal in the second ferrite switch is transmitted along the first direction,

wherein the first direction is opposite the second direction.

It should be noted that the driver can connect a plurality of switch magnetizing coil sets in series according to the method, and the simultaneous control of a plurality of ferrite switches is realized through the first three-terminal switch controller and the second three-terminal switch controller.

In particular, the driver further comprises a first monostable unit and a second monostable unit, wherein,

the output end of the first monostable circuit unit is connected with the control end of the first three-terminal switch controller, the input end of the first monostable circuit unit responds to a first control signal,

the first monostable circuit unit is used for controlling the input time of a first control signal;

the output end of the second monostable circuit unit is connected with the control end of the second three-terminal switch controller, the input end of the second monostable circuit unit responds to a second control signal,

the second monostable circuit unit is used for controlling the input time of a second control signal.

In particular, the driver further comprises a first current amplifier and a second current amplifier, wherein,

the input end of the first current amplifier is connected with the output end of the first monostable one-way unit, the output end of the first current amplifier is connected with the control end of the first three-terminal switch controller,

the first current amplifier is used for increasing the strength of a first control signal;

the input end of the second current amplifier is connected with the output end of the second monostable one-way unit, the output end of the second current amplifier is connected with the control end of the second three-terminal switch controller,

the second current amplifier is used for increasing the strength of the second control signal.

Specifically, the driver further comprises a multi-level logic interconnection printed board;

the multi-level logic interconnection printed board comprises a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, an eighth pin, a ninth pin, a tenth pin and an eleventh pin,

the first end point is connected with the first pin, the second end point is connected with the second pin, the fourth end point is connected with the fourth pin, the fifth end point is connected with the fifth pin, the sixth end point is connected with the sixth pin, the seventh end point is connected with the seventh pin, the eighth end point is connected with the eighth pin, the second end of the first three-terminal switch controller is connected with the ninth pin, the second end of the second three-terminal switch controller is connected with the tenth pin, and the power supply unit is connected with the eleventh pin;

the first pin is conducted with the ninth pin, the second pin is conducted with the fifth pin, the third pin is conducted with the eleventh pin, the fourth pin is conducted with the seventh pin, the sixth pin is conducted with the eleventh pin, and the eighth pin is conducted with the tenth pin;

then when the first three-terminal switch controller is turned on in response to the first control signal, the microwave signal within the first ferrite switch is transmitted in a first direction, the microwave signal within the second ferrite switch is transmitted in the first direction,

when the second three-terminal switch controller is conducted in response to a second control signal, the microwave signal in the first ferrite switch is transmitted along a second direction, the microwave signal in the second ferrite switch is transmitted along the second direction,

wherein the first direction is opposite to the second direction.

Specifically, the driver further comprises a multi-level logic interconnection printed board;

the multi-level logic interconnection printed board comprises a first pin, a second pin, a third pin, a fourth pin, a fifth pin, a sixth pin, a seventh pin, an eighth pin, a ninth pin, a tenth pin and an eleventh pin,

the first end point is connected with the first pin, the second end point is connected with the second pin, the fourth end point is connected with the fourth pin, the fifth end point is connected with the fifth pin, the sixth end point is connected with the sixth pin, the seventh end point is connected with the seventh pin, the eighth end point is connected with the eighth pin, the second end of the first three-terminal switch controller is connected with the ninth pin, the second end of the second three-terminal switch controller is connected with the tenth pin, and the power supply unit is connected with the eleventh pin;

the first pin is conducted with the ninth pin, the second pin is conducted with the sixth pin, the third pin is conducted with the eleventh pin, the fourth pin is conducted with the eighth pin, the fifth pin is conducted with the eleventh pin, and the seventh pin is conducted with the tenth pin;

then when said first three terminal switch controller is turned on in response to a first control signal, the microwave signal within said first ferrite switch is transmitted in a first direction and the microwave signal within said second ferrite switch is transmitted in a second direction,

when the second three-terminal switch controller is switched on in response to a second control signal, the microwave signal in the first ferrite switch is transmitted along a second direction, the microwave signal in the second ferrite switch is transmitted along a first direction,

wherein the first direction is opposite to the second direction.

Specifically, the first three-terminal switch controller and the second three-terminal switch controller are both field effect transistors, wherein a control terminal of the first three-terminal switch controller is a gate of the field effect transistor, a control terminal of the second three-terminal switch controller is a gate of the field effect transistor, a first terminal of the first three-terminal switch controller is a source of the field effect transistor, and a first terminal of the second three-terminal switch controller is a source of the field effect transistor; the second end of the first three-terminal switch controller is a drain electrode of the field effect transistor, and the second end of the second three-terminal switch controller is a drain electrode of the field effect transistor.