High-bandwidth low-loss double-pole double-throw repeater for switching high-speed data paths

Abstract

The invention belongs to the field of high-speed signal transceiving, and particularly discloses a high-bandwidth low-loss double-pole double-throw repeater for switching data paths, which is composed of two DPDTs, the DPDTs are distributed amplification circuit architectures, and due to the fact that the distributed amplification circuit architectures have good broadband characteristics, due to the use of an input matching network and an output matching network, the bandwidth of the DPDTs is greatly improved. The distributed amplification circuit has the characteristics of low input echo reflection and output echo reflection in a wide frequency range, so that the DPDT provided by the invention has the advantages of high bandwidth and low reflection. Meanwhile, different from a traditional transmission gate type switching circuit, the amplification unit used for controlling on or off of a data path has a certain gain, lossless transmission of signals can be achieved, and the DPDT is made to be low in loss and even free of loss.

Description

Technical Field

[0001] This application belongs to the field of high-speed signal transceiver, and more specifically, relates to a high-bandwidth, low-loss double-pole double-throw repeater for switching high-speed data paths. Background Technology

[0002] In current high-speed data communication systems, dynamic switching of signal paths is a critical requirement. A widely used solution is to use repeater circuits based on CMOS transmission gates. However, at extremely high frequencies, repeaters of this architecture suffer from significant insertion loss, bandwidth limitations, and signal distortion due to parasitic parameters, making it difficult to simultaneously meet the performance requirements of high bandwidth and low loss.

[0003] Patent CN108111185A proposes a transmitter / receiver module for a millimeter-wave 5G MIMO communication system. It uses a double-pole double-throw switch based on a single-sided transmission gate. By connecting a transistor in series in the data path, the source and drain of the transistor are connected in series in the data path. At the same time, the on / off state of the transistor is switched by controlling the gate voltage of the transistor, thereby realizing the switching function.

[0004] However, based on single-sided transmission gate switching, the transistor still exhibits a certain drain-source resistance when conducting, resulting in losses along the data path and negatively impacting signal integrity. Furthermore, the transistor's parasitic parameters can degrade high-frequency components of the signal, limiting the switching bandwidth. Therefore, there is an urgent need for an integrated solution that combines high-speed signal relay with low-loss path switching to achieve fast and reliable switching directly in high-bandwidth data paths while maintaining excellent signal integrity. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this application is to provide a high-bandwidth, low-loss double-pole double-throw repeater for switching high-speed data paths, aiming to solve the problems of negative impact on signal integrity and limited bandwidth of existing double-pole double-throw repeaters.

[0006] To achieve the above objectives, in a first aspect, this application proposes a double-pole double-throw switch, comprising: an input transmission line pair, an input matching network, two sets of amplification units, two output transmission line pairs, and two output matching networks, presenting an overall distributed amplifier circuit structure; One end of the input transmission line pair serves as a common port COM with two differential terminals, and the other end is connected to the input matching network to transmit the input signal from the common port COM in the form of a traveling wave on the input transmission line. The other end of the input matching network is grounded and used to absorb the input signal conducted on the input transmission line for impedance matching. Two sets of amplification units are placed symmetrically relative to the input transmission line pairs. The input terminal of each set of amplification units is connected to the input transmission line pair, and the output terminal is connected to the output transmission line pair. The enable ports of the two sets of amplification units are connected to the control port CON in a mutually exclusive manner. This is used to control the gain state of the amplification units according to the switch control signal, thereby determining the transmission direction of the output signal. The input signal is extracted from the input transmission line pair, amplified, and fed into the corresponding output transmission line pair. One output transmission line pair has one end exposed as a normally open port NO with two differential terminals, and the other end connected to the output matching network. The other output transmission line pair has one end exposed as a normally closed port NC with two differential terminals, and the other end connected to the output matching network. Each output transmission line pair is used to combine multiple voltage signals processed by the amplification unit and transmit the output signal; Each output matching network is used to absorb the output signal conducted onto the output transmission line pair, perform impedance matching, and also act as a load.

[0007] To achieve the above objectives, in a second aspect, this application proposes a double-pole double-throw switch, comprising: an output transmission line pair, an output matching network, two sets of amplification units, two input transmission line pairs, and two input matching networks, presenting an overall distributed amplifier circuit structure; One end of an input transmission line pair is used as a normally open port NO with two differential terminals, and the other end is connected to the input matching network. The other input transmission line pair is used as a normally closed port NC with two differential terminals, and the other end is connected to the input matching network. Each input transmission line pair is used to conduct the input signal and distribute the input signal to the various amplification units connected to it; Each input matching network is used to absorb the input signal conducted onto the input transmission line pair for impedance matching; Two sets of amplifier units are placed symmetrically relative to the output transmission line pairs. The input terminal of each amplifier unit is connected to the input transmission line pair, and the output terminal is connected to the output transmission line pair. The enable ports of the two amplifier units are connected to the control port CON in a mutually exclusive manner. This is used to control the gain state of the amplifier unit according to the switch control signal, thereby determining the transmission direction of the input signal, extracting the input signal from the corresponding input transmission line pair, amplifying it, and feeding it into the output transmission line pair. One end of the output transmission line pair serves as a common port COM with two differential terminals, and the other end is connected to the input matching network. It is used to combine multiple voltage signals processed by the amplification unit and transmit the output signal, which is then output from the common port COM. The other end of the output matching network is grounded, which is used to absorb the input signal conducted on the output transmission line, perform impedance matching, and also serve as a load.

[0008] To achieve the above objectives, in a third aspect, this application proposes a high-bandwidth, low-loss double-pole double-throw repeater for switching high-speed data paths, comprising: two identical DPDTs, wherein the DPDTs are double-pole double-throw switches as described in the first or second aspect. The P terminal of the NC port of the first DPDT is coupled to the P terminal of the NC port of the second DPDT, and the N terminal of the NC port of the first DPDT is coupled to the N terminal of the NC port of the second DPDT. The COM port of the first DPDT is used as the third input / output port externally. The NO port of the first DPDT is used as the first input / output port externally. The COM port of the second DPDT is used as the fourth input / output port externally. The NO port of the second DPDT is used as the second input / output port externally.

[0009] Preferably, the control port of the double-pole double-throw repeater is connected to the input terminal of the control network, and the output terminal of the control network is connected to the amplification unit to control the working state of the transistor in the amplification unit. If it is in the linear amplification region, it can transmit signals normally; if it is in the cutoff region, it cannot transmit signals.

[0010] Preferably, in the first operating mode, the connection between the two DPDTs of the dual-pole dual-throw repeater is disconnected, and there is no connection between the two DPDTs; in the second operating mode, the connection between the two DPDTs is connected, and the two DPDTs are cascaded.

[0011] Preferably, in the first operating mode, the COM port of the first DPDT is connected to the NO port of the first DPDT, and the NC port is open; the COM port of the second DPDT is connected to the NO port of the second DPDT, and the NC port is open; the third input / output port is coupled to the first input / output port through a double-pole double-throw repeater, and the fourth input / output port is coupled to the second input / output port through a double-pole double-throw repeater, thereby enabling data to be read from the first input / output port to the third input / output port and data to be loaded from the second input / output port to the fourth input / output port, or data to be read from the second input / output port to the fourth input / output port and data to be loaded from the first input / output port to the third input / output port.

[0012] Preferably, in the second operating mode, the COM port of the first DPDT is connected to the NC port of the first DPDT, and the NO port is open; the COM port of the second DPDT is connected to the NC port of the second DPDT, and the NO port is open; the third input / output port and the fourth input / output port are coupled through a double-pole double-throw repeater, thereby realizing direct communication between the third input / output port and the fourth input / output port.

[0013] Overall, the technical solutions conceived in this application have the following beneficial effects compared with the prior art: (1) This application proposes a double-pole double-throw switch. Due to the good broadband characteristics of the distributed amplifier circuit architecture, the use of input matching network and output matching network enables the distributed amplifier circuit to have low input echo reflection and output echo reflection characteristics over a wide frequency range. Therefore, the DPDT proposed in this application has the advantages of high bandwidth and low reflection. At the same time, unlike the traditional transmission gate switch circuit, the amplification unit used to control the conduction or cutoff of the data path in this application has a certain gain, which can realize lossless signal transmission, making the DPDT low loss or even lossless.

[0014] (2) This application proposes a high-bandwidth, low-loss double-pole double-throw repeater for switching data paths, which consists of two DPDTs. The DPDTs are distributed amplifier circuit architectures that control the on / off states between high-speed data paths, thereby significantly reducing the loss of high-frequency components in the signal and maintaining signal integrity. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a traditional double-pole double-throw switch structure based on a transmission gate, provided by existing technology.

[0016] Figure 2 This is a schematic diagram of the internal structure of a high-bandwidth, low-loss double-pole double-throw repeater for switching high-speed data paths, provided in an embodiment of this application.

[0017] Figure 3 This is a schematic diagram of the overall structure of a high-bandwidth, low-loss double-pole double-throw repeater for switching high-speed data paths, provided in an embodiment of this application.

[0018] Figure 4 This is a circuit diagram of a double-pole double-throw switch provided in an embodiment of this application.

[0019] Figure 5 This is another circuit diagram of the double-pole double-throw switch provided in the embodiments of this application.

[0020] Figure 6 The results are simulation results of the insertion loss of the high-bandwidth, low-loss double-pole double-throw switch provided in the embodiments of this application. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0022] The embodiments of this application are described below with reference to the accompanying drawings.

[0023] like Figure 1 As shown, a traditional double-pole double-throw (DPDT) switch used for switching data paths consists of four transmission gates. The on / off state of the transmission gates can be switched by inputting a control signal from the control port. In this traditional DPDT, when the control signal is high, the common port COM is connected to the normally closed port NC, while the normally open port is open. When the control signal is low, the common port and the normally open port are connected, while the normally closed port is open. Since the transistors that make up the transmission gates still have a certain drain-source resistance when conducting, there will inevitably be losses in the data path of the traditional DPDT. To reduce conduction losses, the size of the transistors in the transmission gates needs to be increased to reduce the drain-source resistance in the on state. However, increasing the transistor size will increase the parasitic resistance at the input and output nodes of the transmission gates, resulting in a decrease in the bandwidth of the transmission gates and thus a decrease in the overall bandwidth of the DPDT.

[0024] To address the aforementioned problems, this application provides a high-bandwidth, low-loss double-pole double-throw repeater for switching data paths, such as... Figure 2 As shown, it includes two identical double-pole double-throw (DPDT) switches, where one output port of one DPDT is connected to one input port of the other DPDT. Input / output ports 1 to 4 are differential ports, each containing two differential terminals, P and N. The two signals flowing through terminals P and N have a 180° phase difference.

[0025] Each DPDT has four external ports: a common port COM with two differential terminals (P and N), a normally open port NO with two differential terminals (P and N), a normally closed port NC with two differential terminals (P and N), and a single-terminal control port CON. Therefore, the DPDT has a total of seven terminals.

[0026] The DPDT's COM port is its input port, NO port is its first output port, and NC port is its second output port. Control signals are provided to the DPDT through the CON port. The DPDT has two internal data channels: the NO branch and the NC branch. The NO branch's input is connected to the COM port, and its output is also connected to the NO port. Control signals input from the CON port can control the NO branch to be on or off. Similarly, the NC branch's input is connected to the COM port, and its output is connected to the NC port. Control signals input from the CON port can control the NC branch to be on or off. When the NO branch is on, the NC branch is off; conversely, when the NO branch is off, the NC branch is on.

[0027] The connection between the two DPDTs is as follows: the P terminal of the COM port of DPDT1 is coupled to the P terminal of input / output port 3; the N terminal of the COM port of DPDT1 is coupled to the N terminal of input / output port 3; the P terminal of the NO port of DPDT1 is coupled to the P terminal of input / output port 1; the N terminal of the NO port of DPDT1 is coupled to the N terminal of input / output port 1; the P terminal of the NC port of DPDT1 is coupled to the P terminal of the NC port of DPDT2; the N terminal of the NC port of DPDT1 is coupled to the N terminal of the NC port of DPDT2; the P terminal of the COM port of DPDT2 is coupled to the P terminal of input / output port 4; the N terminal of the COM port of DPDT2 is coupled to the N terminal of input / output port 4; the P terminal of the NO port of DPDT2 is coupled to the P terminal of input / output port 2; and the N terminal of the NO port of DPDT2 is coupled to the N terminal of input / output port 2.

[0028] Depending on the operating state of the double-pole double-throw repeater, the connection between the two DPDTs can be either on or off, thus changing the connection relationship between the two DPDTs. Specifically, in one operating state, the connection between the two DPDTs is off, and there is no connection between the two DPDTs; in another operating state, the connection between the two DPDTs is on, and the two DPDTs are cascaded.

[0029] Specifically, in operating mode 1, the COM port of DPDT1 is connected to the corresponding NO port, and the NC port is open. Similarly, the COM port of DPDT2 is connected to the corresponding NO port, and the NC port is open. In operating mode 1, input / output port 3 is coupled to input / output port 1 via a double-pole double-throw repeater, and input / output port 4 is coupled to input / output port 2 via a double-pole double-throw repeater. This enables the function of reading data from input / output port 1 to input / output port 3 and loading data from input / output port 2 to input / output port 4, or vice versa.

[0030] Specifically, in operating mode 2, the COM port of DPDT1 is connected to the corresponding NC port, and the NO port is open; the COM port of DPDT2 is connected to the corresponding NC port, and the NO port is open. In operating mode 2, input / output port 3 and input / output port 4 are coupled through a double-pole double-throw repeater, thereby achieving direct communication between input / output port 3 and input / output port 4.

[0031] like Figure 3 As shown, this application provides a high-bandwidth, low-loss double-pole double-throw repeater for switching data paths. It has four differential input / output ports and one control port. The four differential input / output ports are respectively connected to the first input / output port, the second input / output port, the third input / output port, and the fourth input / output port. The control port is connected to a control network.

[0032] To support the implementation of high-bandwidth, low-loss double-pole double-throw repeaters for switching high-speed data paths, this application proposes a DPDT with a distributed amplifier circuit structure.

[0033] like Figure 4As shown, this application proposes a first-structure double-pole double-throw switch, comprising: an input transmission line pair, an input matching network, two sets of amplification units, two output transmission line pairs, and two output matching networks, forming a distributed amplifier circuit structure. One end of the input transmission line pair serves as a common port COM with two differential terminals, and the other end is connected to the input matching network for transmitting the input signal from the common port COM in the form of a traveling wave on the input transmission line. The other end of the input matching network is grounded to absorb the input signal transmitted on the input transmission line and perform impedance matching. The two sets of amplification units are symmetrically placed relative to the input transmission line pair, with the input terminal of each set of amplification units connected to the input transmission line pair and the output terminal connected to the output transmission line pair. The enable port of the amplifier is connected to the control port CON in a mutually exclusive manner. It is used to control the gain state of the amplifier unit according to the switch control signal, thereby determining the transmission direction of the output signal. The input signal is extracted from the input transmission line pair, amplified, and fed into the corresponding output transmission line pair. One end of one output transmission line pair is used as a normally open port NO with two differential terminals, and the other end is connected to the output matching network. The other output transmission line pair is used as a normally closed port NC with two differential terminals, and the other end is connected to the output matching network. Each output transmission line pair is used to combine multiple voltage signals processed by the amplifier unit and conduct the output signal. Each output matching network is used to absorb the output signal conducted on the output transmission line pair, perform impedance matching, and also act as a load.

[0034] Due to the excellent broadband characteristics of the distributed amplifier circuit architecture, and the use of input and output matching networks, the distributed amplifier circuit exhibits low input and output echo reflection characteristics over a wide frequency range. Therefore, the DPDT proposed in this application possesses the advantages of high bandwidth and low reflection. Furthermore, unlike traditional transmission gate switching circuits, the amplification unit used to control the on / off state of the data path in this application has a certain gain, enabling lossless signal transmission, thus making the DPDT low-loss or even lossless.

[0035] like Figure 5As shown, this application proposes a second type of double-pole double-throw switch, comprising: an output transmission line pair, an output matching network, two sets of amplification units, two input transmission line pairs, and two input matching networks, forming a distributed amplifier circuit structure. One end of one input transmission line pair serves as a normally open port (NO) with two differential terminals, and the other end is connected to the input matching network. The other input transmission line pair serves as a normally closed port (NC) with two differential terminals, and the other end is connected to the input matching network. Each input transmission line pair is used to conduct the input signal and distribute it to the amplification units connected to it. Each input matching network is used to absorb the input signal conducted on the input transmission line pair and perform impedance matching. The two sets of amplification units are symmetrically placed relative to the output transmission line pairs. Each amplification unit's input terminal is connected to an input transmission line pair, and its output terminal is connected to an output transmission line pair. The enable ports of the two amplification units are connected to the control port CON in a mutually exclusive manner. This control port CON controls the gain state of the amplification unit based on the switch control signal, thereby determining the transmission direction of the input signal. The input signal is extracted from the corresponding input transmission line pair, amplified, and then fed into the output transmission line pair. One end of the output transmission line pair serves as a common port COM with two differential terminals. The other end is connected to the input matching network, which combines multiple voltage signals processed by the amplification units and conducts the output signal, outputting it from the common port COM. The other end of the output matching network is grounded, used to absorb the input signal conducted on the output transmission line, perform impedance matching, and also act as a load.

[0036] and Figure 4 compared to, Figure 5 The double-pole double-throw switch shown has its input and output positions interchanged, and the amplification unit direction is changed. The input and output transmission lines and matching network positions are also changed, but CON remains connected to the transistor in the amplification unit. This application uses a distributed structure instead of a traditional transmission gate structure, which provides a certain gain to mitigate signal attenuation, while also offering large bandwidth and excellent input / output impedance matching performance.

[0037] The simulation results of the insertion loss of the embodiment and the traditional transmission gate-based switching device under the open condition are as follows: Figure 6 As shown. From Figure 6 It can be seen that the traditional architecture has a low-frequency gain of -0.8 dB and a bandwidth of 32 GHz, while the embodiment described above has a low-frequency gain of 0.6 dB and a bandwidth of 53 GHz. Analysis of the simulation results shows that the traditional architecture, due to its gain being less than 0 dB, will inevitably cause signal attenuation when processing signals, which is detrimental to long-distance, high-quality signal propagation. In contrast, the embodiment described above has a gain greater than 0 dB, thus avoiding signal attenuation. Furthermore, its higher bandwidth allows for the transmission of higher frequency signals or better preservation of high-frequency components, reducing signal distortion.

[0038] In this application, the terms "first" and "second," etc., are used to distinguish different objects, not to describe a specific order of objects. For example, "first response message" and "second response message," etc., are used to distinguish different response messages, not to describe a specific order of response messages.

[0039] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0040] In the description of the embodiments of this application, unless otherwise stated, "multiple" means two or more, for example, multiple processing units means two or more processing units, multiple elements means two or more elements, etc.

[0041] It should be understood that expressions such as “comprising” and “may include” used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as “comprising” and / or “having” are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0042] Furthermore, in this application, the expression "and / or" includes any and all combinations of the associated listed words. For example, the expression "A and / or B" may include A, may include B, or may include both A and B.

[0043] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the term "connection" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after connection. "Rotary connection" refers to a connection where the components can rotate relative to each other after connection. "Sliding connection" refers to a connection where the components can slide relative to each other after connection. The directional terms mentioned in the embodiments of this application, such as "top," "bottom," "inner," "outer," "left," and "right," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0044] Furthermore, the mathematical concepts mentioned in the embodiments of this application, such as symmetry, equality, parallelism, and perpendicularity, are limitations specific to the current technological level, rather than absolute and strict mathematical definitions. Slight deviations are permissible; approximations of symmetry, equality, parallelism, and perpendicularity are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 and 10 degrees. "A and B are perpendicular" means that A and B are perpendicular or approximately perpendicular, and the angle between A and B can be between 80 and 100 degrees.

[0045] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A double-pole double-throw switch, characterized in that, include: One input transmission line pair, one input matching network, two sets of amplification units, two output transmission line pairs, and two output matching networks form a distributed amplifier circuit structure. One end of the input transmission line pair serves as a common port COM with two differential terminals, and the other end is connected to the input matching network to transmit the input signal from the common port COM in the form of a traveling wave on the input transmission line. The other end of the input matching network is grounded and used to absorb the input signal conducted on the input transmission line for impedance matching. Two sets of amplification units are placed symmetrically relative to the input transmission line pairs. The input terminal of each set of amplification units is connected to the input transmission line pair, and the output terminal is connected to the output transmission line pair. The enable ports of the two sets of amplification units are connected to the control port CON in a mutually exclusive manner. This is used to control the gain state of the amplification units according to the switch control signal, thereby determining the transmission direction of the output signal. The input signal is extracted from the input transmission line pair, amplified, and fed into the corresponding output transmission line pair. One output transmission line pair has one end exposed as a normally open port NO with two differential terminals, and the other end connected to the output matching network. The other output transmission line pair has one end exposed as a normally closed port NC with two differential terminals, and the other end connected to the output matching network. Each output transmission line pair is used to combine multiple voltage signals processed by the amplification unit and transmit the output signal; Each output matching network is used to absorb the output signal conducted onto the output transmission line pair, perform impedance matching, and also act as a load.

2. A double-pole double-throw switch, characterized in that, include: One output transmission line pair, one output matching network, two sets of amplification units, two input transmission line pairs, and two input matching networks, presenting an overall distributed amplifier circuit structure; One end of an input transmission line pair is used as a normally open port NO with two differential terminals, and the other end is connected to the input matching network. The other input transmission line pair is used as a normally closed port NC with two differential terminals, and the other end is connected to the input matching network. Each input transmission line pair is used to conduct the input signal and distribute the input signal to the various amplification units connected to it; Each input matching network is used to absorb the input signal conducted onto the input transmission line pair for impedance matching; Two sets of amplifier units are placed symmetrically relative to the output transmission line pairs. The input terminal of each amplifier unit is connected to the input transmission line pair, and the output terminal is connected to the output transmission line pair. The enable ports of the two amplifier units are connected to the control port CON in a mutually exclusive manner. This is used to control the gain state of the amplifier unit according to the switch control signal, thereby determining the transmission direction of the input signal, extracting the input signal from the corresponding input transmission line pair, amplifying it, and feeding it into the output transmission line pair. One end of the output transmission line pair serves as a common port COM with two differential terminals, and the other end is connected to the input matching network. It is used to combine multiple voltage signals processed by the amplification unit and transmit the output signal, which is then output from the common port COM. The other end of the output matching network is grounded, which is used to absorb the input signal conducted on the output transmission line, perform impedance matching, and also serve as a load.

3. A high-bandwidth, low-loss double-pole double-throw repeater for switching high-speed data paths, characterized in that, include: Two identical DPDTs, wherein the DPDT is a double-pole double-throw switch as described in claim 1 or 2; The P terminal of the NC port of the first DPDT is coupled to the P terminal of the NC port of the second DPDT, and the N terminal of the NC port of the first DPDT is coupled to the N terminal of the NC port of the second DPDT. The COM port of the first DPDT is used as the third input / output port externally. The NO port of the first DPDT is used as the first input / output port externally. The COM port of the second DPDT is used as the fourth input / output port externally. The NO port of the second DPDT is used as the second input / output port externally.

4. The dual-pole dual-throw repeater as described in claim 3, characterized in that, The control port of the double-pole double-throw repeater is connected to the input of the control network, and the output of the control network is connected to the amplification unit. It is used to control the working state of the transistor in the amplification unit. If it is in the linear amplification region, it can transmit signals normally. If it is in the cutoff region, it cannot transmit signals.

5. The dual-pole dual-throw repeater as described in claim 3, characterized in that, In the first operating mode, the connection between the two DPDTs of the dual-pole dual-throw repeater is disconnected, and there is no connection between the two DPDTs. In the second operating mode, the connection between the two DPDTs is connected, and the two DPDTs are cascaded.

6. The dual-pole dual-throw repeater as described in claim 5, characterized in that, In the first operating mode, the COM port of the first DPDT is connected to the NO port of the first DPDT, and the NC port is open; the COM port of the second DPDT is connected to the NO port of the second DPDT, and the NC port is open. The third input / output port is coupled to the first input / output port via a double-pole double-throw repeater, and the fourth input / output port is coupled to the second input / output port via a double-pole double-throw repeater. This enables reading data from the third input / output port from the first input / output port and loading data from the second input / output port to the fourth input / output port, or reading data from the fourth input / output port from the second input / output port and loading data from the first input / output port to the third input / output port.

7. The dual-pole dual-throw repeater as described in claim 5, characterized in that, In the second operating mode, the COM port of the first DPDT is connected to the NC port of the first DPDT, and the NO port is open. The COM port of the second DPDT is connected to the NC port of the second DPDT, and the NO port is open. The third input / output port and the fourth input / output port are coupled through a double-pole double-throw repeater, thereby realizing direct connection between the third input / output port and the fourth input / output port.

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