CN116662239A - High-speed serial interface device - Google Patents

Abstract

The application provides a high-speed serial interface device, which relates to the technical field of digital information transmission. The device includes: a first transceiver, a second transceiver, a transformer module and an independent power supply; wherein, the first transceiver and digital control The module is connected; the second transceiver is connected to the bus; the transformer module is arranged between the first transceiver and the second transceiver, and is used for connecting the first transceiver and the second transceiver The baseband data is transmitted between the transceivers; the independent power supply is connected to the second transceiver for supplying power to the second transceiver. The high-speed serial interface device provided by this application supplies power to the second transceiver through an independent power supply, avoiding the primary and secondary isolation problem of the transformer connected to the cable, ensuring normal transmission of baseband data, and improving transmission stability.

Description

High Speed Serial Interface Device

technical field

The present application relates to the technical field of digital information transmission, in particular to a high-speed serial interface device.

Background technique

The bus structure is to connect all the nodes to a bus. When the branch line of the bus is too long, it is easy to cause the bit width to be out of adjustment, causing the receiving node to receive errors. In order to minimize the branch length to ensure continuous impedance, the node device should be placed close to the interface, but too short branch lines limit the use of users.

In the prior art, the method of front-end transceiver and separate digital control is used to solve the limitation on the length of the branch line. Among them, two pairs of differential lines are used, and the middle tap of the transformer is used for power supply. However, this method will cause transformer isolation problems. Common-mode interference from the cable may damage the transceiver, resulting in improper transmission of baseband data.

Contents of the invention

An embodiment of the present application provides a high-speed serial interface device to solve the technical problem of poor stability of baseband data transmission in high-speed data transmission networking in the prior art.

In the first aspect, the embodiment of the present application provides a high-speed serial interface device, including:

a first transceiver, a second transceiver, a transformer module and an independent power supply;

Wherein, the first transceiver is connected to the digital control module; the second transceiver is connected to the bus; the transformer module is arranged between the first transceiver and the second transceiver for The baseband data is transmitted between the first transceiver and the second transceiver; the independent power supply is connected to the second transceiver for supplying power to the second transceiver.

In some embodiments, the transformer module includes a first transformer and a second transformer;

Wherein, the first port of the first transformer is connected to the first transmitter output port of the first transceiver, and is connected to the first receiver input port of the first transceiver; the first transformer's The second port is connected to the second transmitter output port of the first transceiver and is connected to the second receiver input port of the first transceiver; the first transformer is connected to the second transformer; the The first port of the second transformer is connected to the first transmitter input port of the second transceiver, and is connected to the first receiver output port of the second transceiver; the second port of the second transformer Connected to a second transmitter input port of the second transceiver and connected to a second receiver output port of the second transceiver.

In some embodiments, the first port of the first transformer is connected to the first port of the first load resistor; the second port of the first transformer is connected to the first port of the second load resistor; the first A common port of the load resistor and the second load resistor is connected to a first power supply voltage; the first power supply voltage is used to provide an output voltage to the first transceiver.

In some embodiments, a first switch is provided between the first transmitter output port of the first transceiver and the first port of the first transformer; the second transmitter output port of the first transceiver A second switch is provided between the second port of the first transformer; the first switch and the second switch are turned on when the first transceiver sends baseband data to the bus, and the The first transceiver is disconnected when receiving the baseband data sent by the bus.

In some embodiments, a first DC blocking capacitor is provided between the first receiver input port of the first transceiver and the first port of the first transformer; the second receiver of the first transceiver A second DC blocking capacitor is provided between the input port and the second port of the first transformer.

In some embodiments, the first port of the second transformer is connected to the first port of the third load resistor; the second port of the second transformer is connected to the first port of the fourth load resistor; the third A common port of the load resistor and the fourth load resistor is connected to a second power supply voltage; the second power supply voltage is used to provide an output voltage to the second transceiver.

In some embodiments, a third switch is provided between the first receiver output port of the second transceiver and the first port of the second transformer; the second receiver output port of the second transceiver A fourth switch is provided between the second port of the second transformer; the third switch and the fourth switch are disconnected when the second transceiver sends baseband data to the bus, and the The second transceiver is turned on when receiving the baseband data sent by the bus.

In some embodiments, a third DC blocking capacitor is provided between the first transmitter input port of the second transceiver and the first port of the second transformer; the second transmitter of the second transceiver A fourth DC blocking capacitor is provided between the input port and the second port of the second transformer.

In some embodiments, a third transformer is provided between the second transceiver and the bus.

In some embodiments, a fifth switch is provided between the first transmitter output port of the second transceiver and the first port of the third transformer; the second transmitter output port of the second transceiver A sixth switch is provided between the second port of the third transformer; the fifth switch and the sixth switch are turned on when the second transceiver sends baseband data to the bus, and the The second transceiver is disconnected when receiving the baseband data sent by the bus.

The high-speed serial interface device provided by the application includes a first transceiver, a second transceiver, a transformer module and an independent power supply, the transformer module is set between the first transceiver and the second transceiver to transmit baseband data, and through The independent power supply supplies power to the second transceiver, which avoids the primary and secondary isolation problem of the transformer connected to the cable, ensures the normal transmission of baseband data, and improves the stability of transmission.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are some embodiments of the present application. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is one of the structural schematic diagrams of the high-speed serial interface device provided by the embodiment of the present application;

Fig. 2 is the second structural diagram of the high-speed serial interface device provided by the embodiment of the present application;

FIG. 3 is the third schematic diagram of the structure of the high-speed serial interface device provided by the embodiment of the present application.

Detailed ways

In order to increase the transmission rate and transmission distance in traditional high-speed data transmission networking, baseband data is usually multi-carrier modulated such as Orthogonal Frequency Division Multiplexing (OFDM) technology, and even carrier frequency conversion is performed, using radio frequency transceivers Signal transmission, but this greatly increases the complexity of high-speed data transmission networking.

The contradiction between the branch line length and the signal operating frequency in the traditional bus structure can be solved by using the front transceiver to drive the branch cable. However, the high-speed front transceiver is very close to the bus entrance. In order to supply power, two For differential lines, one pair is receiving and one pair is sending, and the middle tap of the transformer is used to supply power, but because the tap of the secondary of the transformer is connected to the power and ground of the primary chip of the transformer, this deteriorates the primary and secondary of the transformer. The isolation makes the common-mode interference from the cable directly affect the power and ground terminals of the primary chip of the transformer, causing damage to the transceiver and causing the baseband data to fail to be transmitted smoothly.

Based on the above technical problems, the embodiment of the present application proposes a high-speed serial interface device. By adding an independent power supply to provide power for the second transceiver, while ensuring power supply, it solves the problem of transformer isolation and ensures high-speed differential serial baseband data. Normal transmission in the networking.

In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.

Figure 1 is one of the structural schematic diagrams of the high-speed serial interface device provided by the embodiment of the present application. As shown in Figure 1, the embodiment of the present application provides a high-speed serial interface device, which includes:

The first transceiver 100, the second transceiver 110, the transformer module 120 and the independent power supply 130;

Wherein, the first transceiver 100 is connected to the digital control module 140; the second transceiver 110 is connected to the bus 150; the transformer module 120 is set between the first transceiver 100 and the second transceiver 110 used to transmit baseband data between the first transceiver 100 and the second transceiver 110; the independent power supply 130 is connected to the second transceiver 110 for sending and receiving to the second transceiver 110 power supply.

Specifically, the digital control module 140 includes a sending end and a receiving end, which are respectively used for sending high-speed differential serial baseband data and receiving high-speed differential serial baseband data.

The transmitter input port of the first transceiver 100 is connected to the sending port of the digital control module 140 , and the receiver output port of the first transceiver 100 is connected to the receiving port of the digital control module 140 .

The second transceiver 110 is connected to the bus 150 . Wherein, the transmitter output port and the receiver input port of the second transceiver 110 are connected to the bus 150 .

The transformer module 120 may include a plurality of transformers connected by cables. The transformer module 120 is used to transmit baseband data between the first transceiver 100 and the second transceiver 110 , such as high-speed differential serial baseband data.

In the embodiment of the present application, four wires are used, two of which are signal wires and two are power supply wires. The voltage of the independent power supply 130 provides power to the second transceiver through a power supply cable, and the ground of the independent power supply 130 is connected to the ground terminal of the second transceiver through another power supply cable. Here, the independent power supply 130 is isolated from the chip power supply of the first transceiver 100 , and since the transformer has no tap connection, its isolation degree will not be deteriorated, and the common-mode interference from cables is resisted.

In the embodiment of the present application, the first transceiver 100 and the second transceiver 110 may share two signal cables through a time division multiplexing switch.

For example, when the digital control module 140 sends high-speed differential serial baseband data to the bus 150 , the independent power supply 130 supplies power to the second transceiver 110 through two cables. The first transceiver 100 receives the high-speed differential serial baseband data from the digital control module 140, and then sends the high-speed differential serial baseband data to the transformer module 120, and the transformer module 120 transmits the high-speed differential serial baseband data to the second transceiver 110 , the second transceiver 110 sends the high-speed differential serial baseband data to the bus 150 .

For another example, when the bus 150 transmits high-speed differential serial baseband data to the digital control module 140, the independent power supply 130 supplies power to the second transceiver 110 through two cables. The second transceiver 110 receives the high-speed differential serial baseband data on the independent power supply 130, and transmits it to the transformer module 120, and the high-speed differential serial baseband data is transmitted to the first transceiver 100 by the transformer module 120, the first transceiver After receiving the high-speed differential serial baseband data, 100 sends it to the digital control module 140 .

The high-speed serial interface device provided in the embodiment of the present application uses the front transceiver to drive the branch cable, so that the signal received by the high-speed serial interface device is not affected by the length of the branch line; the second transceiver is powered by an independent power supply, Since there is no tap connection between the transformers between the transceivers, the isolation problem between the primary and secondary transformers of the pre-power supply system is avoided, and the ability to resist common-mode interference is improved; in addition, the wiring of the high-speed serial interface device is simple, and four The wiring solves the power supply problem and at the same time solves the transformer isolation problem without increasing the number of cables, thereby improving the compatibility of the high-speed serial interface device.

In some embodiments, the transformer module includes a first transformer and a second transformer;

Wherein, the first port of the first transformer is connected to the first transmitter output port of the first transceiver, and is connected to the first receiver input port of the first transceiver; the first transformer's The second port is connected to the second transmitter output port of the first transceiver and is connected to the second receiver input port of the first transceiver; the first transformer is connected to the second transformer; the The first port of the second transformer is connected to the first transmitter input port of the second transceiver, and is connected to the first receiver output port of the second transceiver; the second port of the second transformer Connected to a second transmitter input port of the second transceiver and connected to a second receiver output port of the second transceiver.

Specifically, the transformer module includes a first transformer and a second transformer, and the first transformer and the second transformer are connected by two cables.

In the transmission path, the first port of the first transformer is connected to the first transmitter output port of the first transceiver, and the second port of the first transformer is connected to the second transmitter of the first transceiver. The output port is connected; the first port of the second transformer is connected to the first transmitter input port of the second transceiver, and the second port of the second transformer is connected to the second transmitter of the second transceiver. Input port connection.

In the receive path, the first port of the first transformer is connected to the first receiver input port of the first transceiver, and the second port of the first transformer is connected to the second receiver of the first transceiver. input port connection; the first port of the second transformer is connected to the first receiver output port of the second transceiver, the second port of the second transformer is connected to the second receiver of the second transceiver output port connection.

In some embodiments, the first port of the first transformer is connected to the first port of the first load resistor; the second port of the first transformer is connected to the first port of the second load resistor; the first A common port of the load resistor and the second load resistor is connected to a first power supply voltage; the first power supply voltage is used to provide an output voltage to the first transceiver.

Specifically, a first load resistor and a second load resistor are connected between the first port and the second port of the first transformer, the first port of the first load resistor is connected to the first port of the first transformer, The first port of the second load resistor is connected to the second port of the first transformer.

In the embodiment of the present application, the second port of the first load resistor is the second port of the second load resistor, that is, the common terminal of the first load resistor and the second load resistor, the common terminal is connected to the first power supply voltage, and the first The supply voltage is used to provide an output voltage for the first transceiver.

In some embodiments, a first switch is provided between the first transmitter output port of the first transceiver and the first port of the first transformer; the second transmitter output port of the first transceiver A second switch is provided between the second port of the first transformer; the first switch and the second switch are turned on when the first transceiver sends baseband data to the bus, and the The first transceiver is disconnected when receiving the baseband data sent by the bus.

Specifically, in the transmission path, a switch is provided between the transmitter of the first transceiver and the first transformer, so as to share the cable through a time-division multiplexing switch.

Wherein, the first transmitter output port of the first transceiver is connected to the first port of the first transformer through a first switch, and the second transmitter output port of the first transceiver is connected to the first transformer The second port of is connected through the second switch.

In order to realize cable sharing and ensure the correct transmission of baseband data, the first switch and the second switch are turned on when the first transceiver sends baseband data to the bus, and when the first transceiver receives The bus is disconnected when sending baseband data.

In some embodiments, a first DC blocking capacitor is provided between the first receiver input port of the first transceiver and the first port of the first transformer; the second receiver of the first transceiver A second DC blocking capacitor is provided between the input port and the second port of the first transformer.

Specifically, in the receiving path, a DC blocking capacitor is provided between the receiver of the first transceiver and the first transformer.

Wherein, the first receiver input port of the first transceiver is connected to the first port of the first transformer through a first DC blocking capacitor; the second receiver input port of the first transceiver is connected to the first port of the first transformer. The second ports of the first transformer are connected through a second DC blocking capacitor.

In some embodiments, the first port of the second transformer is connected to the first port of the third load resistor; the second port of the second transformer is connected to the first port of the fourth load resistor; the third A common port of the load resistor and the fourth load resistor is connected to a second power supply voltage; the second power supply voltage is used to provide an output voltage to the second transceiver.

Specifically, a third load resistor and a fourth load resistor are connected between the first port and the second port of the second transformer, the first port of the third load resistor is connected to the first port of the second transformer, The first port of the fourth load resistor is connected to the second port of the second transformer.

In the embodiment of the present application, the second port of the third load resistor is the second port of the fourth load resistor, that is, the common terminal of the third load resistor and the fourth load resistor, the common terminal is connected to the second power supply voltage, and the second The supply voltage is used to provide an output voltage for the second transceiver.

In some embodiments, a third switch is provided between the first receiver output port of the second transceiver and the first port of the second transformer; the second receiver output port of the second transceiver A fourth switch is provided between the second port of the second transformer; the third switch and the fourth switch are disconnected when the second transceiver sends baseband data to the bus, and the The second transceiver is turned on when receiving the baseband data sent by the bus.

Specifically, in the transmission path, a switch is provided between the receiver of the second transceiver and the second transformer, so as to share the cable through a time-division multiplexing switch.

Wherein, the first receiver output port of the second transceiver is connected to the first port of the second transformer through a third switch, and the second receiver output port of the second transceiver is connected to the second transformer The second port of is connected through the fourth switch.

In order to realize cable sharing and ensure the correct transmission of baseband data, the third switch and the fourth switch are turned on when the second transceiver sends baseband data to the bus, and when the second transceiver receives The bus is disconnected when sending baseband data.

In some embodiments, a third DC blocking capacitor is provided between the first transmitter input port of the second transceiver and the first port of the second transformer; the second transmitter of the second transceiver A fourth DC blocking capacitor is provided between the input port and the second port of the second transformer.

Specifically, in the receiving path, a DC blocking capacitor is provided between the receiver of the second transceiver and the second transformer.

Wherein, the first transmitter input port of the second transceiver is connected to the first port of the second transformer through a third DC blocking capacitor; the second transmitter input port of the second transceiver is connected to the first port of the second transformer. The second ports of the second transformer are connected through a fourth DC blocking capacitor.

In some embodiments, a third transformer is provided between the second transceiver and the bus.

Specifically, a third transformer is also provided between the second transceiver and the bus. The third transformer includes a first coil, a second coil and a third coil.

The high-speed serial interface device provided by the embodiment of the present application solves the problem of transmitter output impedance matching by adding a third transformer between the second transceiver and the bus, and by selecting and adjusting the coil turns of the third transformer. problem and receiver input high impedance problem.

In some embodiments, a fifth switch is provided between the first transmitter output port of the second transceiver and the first port of the third transformer; the second transmitter output port of the second transceiver A sixth switch is provided between the second port of the third transformer; the fifth switch and the sixth switch are turned on when the second transceiver sends baseband data to the bus, and the The second transceiver is disconnected when receiving the baseband data sent by the bus.

Specifically, in the transmission path, a switch is provided between the transmitter of the second transceiver and the third transformer, so as to share the cable through a time-division multiplexing switch.

Wherein, the first transmitter output port of the second transceiver is connected to the first port of the third transformer through a fifth switch, and the second transmitter output port of the second transceiver is connected to the third transformer The second port of is connected through the sixth switch.

In order to realize cable sharing and ensure correct transmission of baseband data, the fifth switch and the sixth switch are turned on when the second transceiver sends baseband data to the bus, and when the second transceiver receives The bus is disconnected when sending baseband data.

The high-speed serial interface device provided by the application includes a first transceiver, a second transceiver, a transformer module and an independent power supply, the transformer module is set between the first transceiver and the second transceiver to transmit baseband data, and through The independent power supply supplies power to the second transceiver, which avoids the primary and secondary isolation problem of the transformer connected to the cable, ensures the normal transmission of baseband data, and improves the stability of transmission.

The high-speed serial interface devices provided by the above-mentioned embodiments are further described below through specific examples:

Example 1: Figure 2 is the second schematic diagram of the structure of the high-speed serial interface device provided by the embodiment of the present application. As shown in Figure 2, the workflow of the transmission path (the terminal sends data to the bus) of the branch circuit is as follows:

1. Port 1 and port 2 of the digital control module send high-speed differential serial baseband data, port 1 is a differential p-port, and port 2 is a differential n-port.

2. Port 1 and port 2 of the transceiver TR1 module receive high-speed differential serial baseband data, port 1 of TR1 is connected to port 1 of the digital control module, and port 2 of TR1 is connected to port 2 of the digital control module.

3. Port 5 and port 6 of the transceiver TR1 module are respectively connected to switch T1 and switch T2, wherein, when the terminal sends data to the bus, T1 and T2 are turned on, and when the terminal receives data from the bus, T1 and T2 are disconnected, and transmit and receive through T1 and T2 Transmitter TR1 sends high-speed differential serial baseband data to port 1 and port 2 of transformer T1.

4. The load resistor R1 and the load resistor R2 are respectively connected to port 1 and port 2 of the transformer T1, and the common terminal of R1 and R2 is connected to the power supply voltage VDC10, which provides the output voltage for the transmitter of the transceiver TR1.

5. The port 3 and the port 4 of the transformer T1 are connected to the port 3 and the port 4 of the transformer T2 through the cable L1 and the cable L2.

6. Port 1 and port 2 of the transformer T2 are respectively connected to the left end of the DC blocking capacitor C3 and the left end of the DC blocking capacitor C4. and Port 2 for high-speed differential serial baseband data.

7. The load resistor R3 and the load resistor R4 are respectively connected to port 1 and port 2 of the transformer T2, and the common terminal of R3 and R4 is connected to the power supply voltage VDC20, which provides the output voltage for the transmitter of the transceiver TR2.

8. Port 5 and port 6 of the transceiver TR2 module are respectively connected to switch T5 and switch T6, wherein, when the terminal sends data to the bus, T5 and T6 are turned on, and when the terminal receives data from the bus, T5 and T6 are disconnected, and transmit and receive through T5 and T6 Transmitter TR2 sends high-speed differential serial baseband data to port 1 and port 2 of transformer T3.

9. The high-speed differential serial baseband data is connected to the buses BUS_P and BUS_N through ports 5 and 6 of the transformer T3.

As shown in Figure 2, the workflow of the receive path (the terminal receives data from the bus) of the branch circuit is as follows:

1. Port 3 and port 4 of the digital control module receive high-speed differential serial baseband data, port 3 is a differential p-port, and port 4 is a differential n-port.

2. Port 3 and port 4 of the transceiver TR1 module transmit high-speed differential serial baseband data, port 3 of TR1 is connected to port 3 of the digital control module, and port 4 of TR1 is connected to port 4 of the digital control module.

3. Port 7 and port 8 of the transceiver TR1 module are respectively connected to the left end of the DC blocking capacitor C1 and the left end of the DC blocking capacitor C2.

4. The right end of DC blocking capacitor C1 and the right end of C2 are respectively connected to port 1 and port 2 of transformer T1 to receive high-speed differential serial baseband data from port 1 and port 2 of transformer T1.

5. Port 1 and port 2 of the transformer T2 are respectively connected to switches T3 and T4, wherein T3 and T4 are disconnected when the terminal sends data to the bus, T3 and T4 are turned on when the terminal receives data from the bus, and T3 and T4 are respectively connected to the transceiver tor TR2 module port 3 and port 4.

6. Port 7 and port 8 of the transceiver TR2 module are respectively connected to port 3 and port 4 of the transformer T3.

7. Port 5 and port 6 of the transformer T3 are respectively connected to buses BUS_P and BUS_N to receive high-speed differential serial baseband data.

Example 2: Figure 3 is the third structural diagram of the high-speed serial interface device provided by the embodiment of the present application. As shown in Figure 3, two splitters share one digital control, and the high-speed serial interface device is used as a repeater To expand the bus, support the function of extending the main bus 150 to the slave bus 300, support more branches and more flexible wiring.

The branch structure in Figure 3 consists of digital control modules, transceivers (including TR11, TR21, TR12 and TR22), transformers (including T11, T21, T31 and T12, T22, T32), switches (including T11 to T61 and T12 to T62 )composition.

Both the transformers T31 and T32 include a first coil, a second coil and a third coil, the number of turns of the first coil is N1, the number of turns of the second coil is N2, and the number of turns of the third coil is N3.

The coil turns N1 and N3 of the transformers T31 and T32 are selected so that the differential impedance of the bus 100 ohm is transformed to the differential impedance of the transformer (T31 and T32) ports 1 and 2 equal to the output impedance of the transmitter. The coil turns N2 and N3 of the transformers T31 and T32 are selected so that the differential input impedance of the receiver is converted to a high impedance (kohm order) for the differential impedance of ports 5 and 6 of the transformer (T31 and T32).

The high-speed serial interface device provided in the embodiment of the present application uses the front transceiver to drive the branch cable, so that the signal received by the high-speed serial interface device is not affected by the length of the branch line; the second transceiver is powered by an independent power supply, Since there is no tap connection between the transformers between the transceivers, the isolation problem between the primary and secondary transformers of the pre-power supply system is avoided, thereby solving the problem of inter-symbol interference caused by the branch length and improving the ability to resist common-mode interference; in addition , the wiring of the high-speed serial interface device is simple, and still uses four wires. While solving the problem of power supply, it can solve the problem of transformer isolation without increasing the number of cables. It is compatible with the original wiring and improves the high-speed serial interface. line interface device compatibility.

It should be noted that the division of units/modules in the above embodiments of the present application is schematic, and is only a logical function division, and there may be other division methods in actual implementation. In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit. The above-mentioned integrated units can be implemented in the form of hardware or in the form of software functional units.

In addition, it should be noted that the terms "first" and "second" in the embodiments of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein and that "first" and "second" distinguish objects. It is usually one category, and the number of objects is not limited. For example, there may be one or more first objects.

Obviously, those skilled in the art can make various changes and modifications to the application without departing from the spirit and scope of the application. In this way, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these modifications and variations.

Claims (10)

1. A high-speed serial interface device, characterized in that, comprising: a first transceiver, a second transceiver, a transformer module and an independent power supply; Wherein, the first transceiver is connected to the digital control module; the second transceiver is connected to the bus; the transformer module is arranged between the first transceiver and the second transceiver for The baseband data is transmitted between the first transceiver and the second transceiver; the independent power supply is connected to the second transceiver for supplying power to the second transceiver. 2. The high-speed serial interface device according to claim 1, wherein the transformer module includes a first transformer and a second transformer; Wherein, the first port of the first transformer is connected to the first transmitter output port of the first transceiver, and is connected to the first receiver input port of the first transceiver; the first transformer's The second port is connected to the second transmitter output port of the first transceiver and is connected to the second receiver input port of the first transceiver; the first transformer is connected to the second transformer; the The first port of the second transformer is connected to the first transmitter input port of the second transceiver, and is connected to the first receiver output port of the second transceiver; the second port of the second transformer Connected to a second transmitter input port of the second transceiver and connected to a second receiver output port of the second transceiver. 3. The high-speed serial interface device according to claim 2, wherein the first port of the first transformer is connected to the first port of the first load resistor; the second port of the first transformer is connected to the first port of the first load resistor The first ports of the two load resistors are connected; the common port of the first load resistor and the second load resistor is connected to a first power supply voltage; the first power supply voltage is used to provide an output voltage to the first transceiver. 4. The high-speed serial interface device according to claim 2, wherein a first switch is arranged between the first transmitter output port of the first transceiver and the first port of the first transformer; A second switch is provided between the second transmitter output port of the first transceiver and the second port of the first transformer; the first switch and the second switch are connected between the first transceiver and The bus is turned on when the baseband data is sent, and is turned off when the first transceiver receives the baseband data sent by the bus. 5. The high-speed serial interface device according to claim 2, wherein a first DC blocking is provided between the first receiver input port of the first transceiver and the first port of the first transformer. Capacitor; a second DC blocking capacitor is provided between the second receiver input port of the first transceiver and the second port of the first transformer. 6. The high-speed serial interface device according to claim 2, wherein the first port of the second transformer is connected to the first port of the third load resistor; the second port of the second transformer is connected to the first port of the second transformer The first ports of the four load resistors are connected; the common port of the third load resistor and the fourth load resistor is connected to a second power supply voltage; the second power supply voltage is used to provide an output voltage to the second transceiver. 7. The high-speed serial interface device according to claim 2, wherein a third switch is arranged between the first receiver output port of the second transceiver and the first port of the second transformer; A fourth switch is provided between the second receiver output port of the second transceiver and the second port of the second transformer; the third switch and the fourth switch are connected between the second transceiver to The bus is turned off when sending baseband data, and turned on when the second transceiver receives the baseband data sent by the bus. 8. The high-speed serial interface device according to claim 2, wherein a third DC blocking device is provided between the first transmitter input port of the second transceiver and the first port of the second transformer. Capacitor; a fourth DC blocking capacitor is provided between the second transmitter input port of the second transceiver and the second port of the second transformer. 9. The high-speed serial interface device according to claim 1, wherein a third transformer is provided between the second transceiver and the bus. 10. The high-speed serial interface device according to claim 9, wherein a fifth switch is arranged between the first transmitter output port of the second transceiver and the first port of the third transformer; A sixth switch is provided between the second transmitter output port of the second transceiver and the second port of the third transformer; the fifth switch and the sixth switch are connected between the second transceiver to The bus is turned on when the baseband data is sent, and is turned off when the second transceiver receives the baseband data sent by the bus.