CN116719770B - Self-adaptive high-speed serial data transmission device - Google Patents

Self-adaptive high-speed serial data transmission device Download PDF

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Publication number
CN116719770B
CN116719770B CN202310989605.7A CN202310989605A CN116719770B CN 116719770 B CN116719770 B CN 116719770B CN 202310989605 A CN202310989605 A CN 202310989605A CN 116719770 B CN116719770 B CN 116719770B
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China
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port
amplifier
module
bus
node
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CN116719770A (en
Inventor
黄炳
刘耕远
房丽丽
何斌
刘晓娟
杨丽丽
沈少辉
应子罡
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Beijing Tasson Science and Technology Co Ltd
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Beijing Tasson Science and Technology Co Ltd
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/40—Bus structure
    • G06F13/4063—Device-to-bus coupling
    • G06F13/4068—Electrical coupling
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/38—Information transfer, e.g. on bus
    • G06F13/42—Bus transfer protocol, e.g. handshake; Synchronisation
    • G06F13/4282—Bus transfer protocol, e.g. handshake; Synchronisation on a serial bus, e.g. I2C bus, SPI bus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

Abstract

The embodiment of the application provides a self-adaptive high-speed serial data transmission device, relates to the technical field of digital information transmission, and comprises: a plurality of nodes connected in series, each node of the plurality of nodes comprising: the digital control module is connected with the transceiver and the amplifier module in a two-to-two mode, the transceiver is arranged between the digital control module and the amplifier module, the amplifier module is arranged between the transceiver and the bus, and the digital control module is used for adjusting the gain of the amplifier module; the plurality of nodes comprise a master control node and a plurality of self-adaptive slave nodes, the self-adaptive slave nodes further comprise a directional coupler module, and the directional coupler module is arranged between the amplifier module and the bus. According to the embodiment of the application, the amplifier module is arranged between the transceivers of all the nodes and the bus, the gain of the amplifier module is adjusted through the digital control module, so that the attenuation of a channel is made up, and the dynamic range of the attenuation of the signal amplitudes of different nodes of the bus is enlarged.

Description

Self-adaptive high-speed serial data transmission device
Technical Field
The present disclosure relates to the field of digital information transmission technologies, and in particular, to a self-adaptive high-speed serial data transmission device.
Background
The bus structure is characterized in that all nodes are hung on one bus, and the bus structure is easy to realize, low in cost, flexible in wiring and good in expansibility.
The influence of any branch circuit short circuit in the traditional bus structure on other branch circuits and the contradiction between the length of the branch line and the working frequency of the signal can be well solved through the branch isolation degree of the directional coupler.
In practice, however, the directional coupler brings about a gradual attenuation of the bus signal, and as the number of slave nodes increases, the amplitude of the input signal of the first slave node and the amplitude of the input signal of the last slave node are greatly different. Similarly, the signal amplitude of each slave node received by the master node is also different, which exceeds the input requirement range of the transceiver.
Disclosure of Invention
In view of the foregoing problems of the related art, embodiments of the present application provide an adaptive high-speed serial data transmission device.
The application provides an adaptive high-speed serial data transmission device, comprising:
a plurality of nodes connected in series, each node of the plurality of nodes comprising: the digital control module is connected with the transceiver and the amplifier module in a two-to-two mode, the transceiver is arranged between the digital control module and the amplifier module, the amplifier module is arranged between the transceiver and the bus, and the digital control module is used for adjusting the gain of the amplifier module;
the plurality of nodes comprise a master control node and a plurality of self-adaptive slave nodes, the self-adaptive slave nodes further comprise a directional coupler module, and the directional coupler module is arranged between the amplifier module and the bus.
In some embodiments, the amplifier module includes a transmit amplifier and a receive amplifier; in the master node, the gains of the transmit amplifier and the receive amplifier are fixed.
In some embodiments, the amplifier module includes a transmit amplifier and a receive amplifier;
in the case that the node is an adaptive slave node, the adaptive slave node further includes an amplitude detector, which is disposed between the receiving amplifier and the digital control module.
In some embodiments, the digital control module is configured to adjust a gain of the amplifier module, comprising:
determining a difference between the output amplitude of the receiving amplifier detected by the amplitude detector and a preset value;
and under the condition that the difference value is larger than a target value, adjusting the gain of the receiving amplifier until the difference value between the output amplitude of the receiving amplifier and the preset value is smaller than or equal to the target value.
In some embodiments, the digital control module is configured to adjust a gain of the amplifier module, further comprising:
and adjusting the gain of the transmitting amplifier based on the adjusted gain of the receiving amplifier until the sum of the gains of the receiving amplifier and the transmitting amplifier is a constant, wherein the constant is related to the gain of an amplifier module in a main control node.
In some embodiments, each of the nodes further comprises a first transformer;
in the case that the node is a master control node, the first transformer is arranged between the amplifier module and the bus;
in the case where the node is an adaptive slave node, the first transformer is disposed between the amplifier module and the directional coupler module.
In some embodiments, the unidirectional input end and the reverse input end of the transmitting amplifier are respectively connected with a first port and a second port of the transceiver, the unidirectional output end is connected with a first port of the first transformer, the reverse output end is connected with a second port of the first transformer, and the bus port is connected with a first bus port of the digital control module.
In some embodiments, the unidirectional output end and the reverse output end of the receiving amplifier are respectively connected with the third port and the fourth port of the transceiver, the unidirectional input end is connected with the first port of the first transformer, the reverse output end is connected with the second port of the first transformer, and the bus port is connected with the second bus port of the digital control module.
In some embodiments, the first port of the amplitude detector is connected to the unidirectional output port of the receive amplifier, the second port is connected to the reverse output port of the receive amplifier, and the third port is connected to the third bus port of the digital control module.
According to the self-adaptive high-speed serial data transmission device, the amplifier module is arranged between the transceivers of all the nodes and the bus, the gain of the amplifier module is adjusted through the digital control module, attenuation of a channel is made up, and the dynamic range of signal amplitude attenuation of different nodes of the bus is enlarged.
Drawings
For a clearer description of the present application or of the prior art, the drawings that are used in the description of the embodiments or of the prior art will be briefly described, it being apparent that the drawings in the description below are some embodiments of the present application, and that other drawings may be obtained from these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a high-speed serial data transmission device according to the prior art;
fig. 2 is a schematic structural diagram of an adaptive high-speed serial data transmission device according to an embodiment of the present application;
fig. 3 is one of schematic structural diagrams of a master node according to an embodiment of the present application;
FIG. 4 is a schematic diagram of an adaptive slave node according to an embodiment of the present disclosure;
FIG. 5 is a second schematic structural diagram of a master node according to an embodiment of the present disclosure;
FIG. 6 is a second schematic diagram of an adaptive slave node according to an embodiment of the present disclosure;
FIG. 7 is a third schematic structural diagram of a master node according to an embodiment of the present disclosure;
fig. 8 is a third schematic structural diagram of an adaptive slave node according to an embodiment of the present application.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present application more apparent, the technical solutions in the present application will be clearly and completely described below with reference to the drawings in the present application, and it is apparent that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, are intended to be within the scope of the present application.
Fig. 1 is a schematic structural diagram of a high-speed serial data transmission device provided in the prior art, and as shown in fig. 1, the device is in a bus structure and comprises a master node and M slave nodes, wherein each slave node is connected with a bus through a directional coupler. When any slave node needs to transmit data to another slave node, the slave node needs to transmit data to the master control node first, and then the master control node transmits the data to the other slave node.
By the arrangement of the directional coupler, the cable length of the branch circuit in a conventional bus structure can be divided into two parts, namely the directional coupler to bus and the directional coupler to transceiver.
Wherein the directional coupler is close to the bus, so that the line length from the directional coupler to the bus is very short; the directional coupler is connected to the transceiver in a point-to-point serial communication mode, and the transceiver can compensate the channel attenuation of the cable through equalization and pre-emphasis, so that the signal integrity requirement can be met, and the cable length is not limited.
Because the directional coupler exists, the coupling degree exists between the branch circuit and the bus, and under the condition of larger coupling degree, the impedance of the branch circuit has smaller influence on data transmission on the bus, so that the work of other branch circuits on the bus can not be influenced under the condition of short circuit of the branch circuit where the device is positioned.
Therefore, the directional coupler can well solve the influence of the short circuit of any branch circuit in the traditional bus structure on other branch circuits and the contradiction between the length of the branch line and the working frequency of the signal.
In practice, however, the directional coupler brings about a gradual attenuation of the bus signal, and as the number of slave nodes increases, the amplitude of the input signal of the first slave node and the amplitude of the input signal of the last slave node are greatly different. Similarly, the signal amplitude of each slave node received by the master node is also different, which exceeds the input requirement range of the transceiver.
Therefore, the embodiment of the application provides a self-adaptive high-speed serial data transmission device, an amplifier module is arranged between a transceiver of each node and a bus, and the gain of the amplifier module is adjusted through a digital control module to compensate the attenuation of a channel and enlarge the dynamic range of the attenuation of the signal amplitudes of different nodes of the bus.
Fig. 2 is a schematic structural diagram of an adaptive high-speed serial data transmission device according to an embodiment of the present application, where the device is shown in fig. 2, and is in a bus structure, and includes a plurality of nodes connected in series, where the plurality of nodes includes a master node and M adaptive slave nodes, and each adaptive slave node is connected to a bus through a directional coupler module.
Fig. 3 is a schematic structural diagram of a master node according to an embodiment of the present application, as shown in fig. 3, in the adaptive high-speed serial data transmission device according to an embodiment of the present application, the master node at least includes a digital control module 301, a transceiver 302, and an amplifier module 303, where the transceiver 302 is disposed between the digital control module 301 and the amplifier module 303, the amplifier module 303 is disposed between the transceiver 302 and the bus 100, and the digital control module 301 is configured to adjust a gain of the amplifier module 303.
Fig. 4 is one of schematic structural diagrams of an adaptive slave node provided in an embodiment of the present application, as shown in fig. 4, in an adaptive high-speed serial data transmission device provided in an embodiment of the present application, each adaptive slave node at least includes: the digital control module 401, the transceiver 402 and the amplifier module 403 are connected in two-to-two mode, the transceiver 402 is arranged between the digital control module 401 and the amplifier module 403, the amplifier module 403 is arranged between the transceiver 402 and the bus 100, and the digital control module 401 is used for adjusting the gain of the amplifier module 403. In addition, each adaptive slave node further comprises a directional coupler module 404, which is arranged between the amplifier module 403 and the bus 100.
According to the self-adaptive high-speed serial data transmission device, the amplifier module is arranged between the transceivers of all the nodes and the bus, the gain of the amplifier module is adjusted through the digital control module, attenuation of a channel is made up, and the dynamic range of signal amplitude attenuation of different nodes of the bus is enlarged.
In some embodiments, the amplifier module includes a transmit amplifier and a receive amplifier.
Specifically, for the master node, the amplifier module 303 may include a transmit amplifier and a receive amplifier. For an adaptive slave node, the amplifier module 403 may include a transmit amplifier and a receive amplifier.
In some embodiments, in the master node, the gains of the transmit and receive amplifiers are fixed.
Specifically, in the master control node, gains of the transmitting amplifier and the receiving amplifier are fixed, so that the problem of set-up time caused by frequent gain adjustment can be avoided.
In some embodiments, where the node is an adaptive slave node, the adaptive slave node further comprises an amplitude detector disposed between the receive amplifier and the digital control module.
Specifically, for the adaptive slave node, an amplitude detector is further included, and the amplitude detector is disposed between the receiving amplifier and the digital control module 401. The amplitude detector may detect the amplitude of the output signal of the adaptive receive amplifier from the node and send a phase Guan Shuzhi to the digital control module.
In some embodiments, in the adaptive slave node, the digital control module 401 is configured to adjust the gain of the amplifier module 403, specifically including:
determining a difference value between the output amplitude of the receiving amplifier detected by the amplitude detector and a preset value;
and under the condition that the difference value is larger than the target value, adjusting the gain of the receiving amplifier until the difference value between the output amplitude of the receiving amplifier and the preset value is smaller than or equal to the target value.
Specifically, in the adaptive slave node, the output amplitude of the receiving amplifier is detected by an amplitude detector. The digital control module 401 receives the output amplitude of the receiving amplifier detected by the amplitude detector, compares the received output amplitude with a preset value, and looks at the magnitude relation between the difference (absolute value) and the target value (e.g., 1 db) of the received output amplitude and the preset value. If the difference value of the two is smaller than the target value, the gain of the receiving amplifier does not need to be adjusted; if the difference between the two is larger than the target value, the gain of the receiving amplifier is adjusted until the difference between the two is smaller than or equal to the target value.
According to the self-adaptive high-speed serial data transmission device, the output amplitude of the receiving amplifier is detected by the self-adaptive slave node, whether the gain of the receiving amplifier is adjusted or not is determined based on the detection result, and the fluctuation of the output amplitude of the receiving amplifier in a small range is ensured to be up and down at the preset value, so that the channel attenuation can be estimated.
In some embodiments, the digital control module 401 is configured to adjust the gain of the amplifier module 403, and further includes:
and adjusting the gain of the transmitting amplifier based on the adjusted gain of the receiving amplifier until the sum of the gains of the receiving amplifier and the transmitting amplifier is a constant, wherein the constant is related to the gain of the amplifier module in the main control node.
Specifically, after adjusting the gain of the receiving amplifier until the difference between the output amplitude of the receiving amplifier and the preset value is smaller than or equal to the target value, the digital control module adjusts the gain of the transmitting amplifier based on the adjusted gain of the receiving amplifier until the sum of the gains of the receiving amplifier and the transmitting amplifier is constant, thereby compensating for the attenuation of the channel. The constant is related to the gain of the amplifier module in the master node. Optionally, the gains of the transmit amplifier and the receive amplifier in the master node are fixed, and the sum of the gains of the receive amplifier and the transmit amplifier in the adaptive slave node is equal to the sum of the gains of the transmit amplifier and the receive amplifier in the master node.
Because the sending gain of the self-adaptive slave node is self-adaptive, under the condition that the receiving amplifier gain of the master control node is fixed, the transceiver of the master control node can obtain stable receiving amplitude, and the dynamic range of signal amplitude attenuation of different nodes of the bus is enlarged.
According to the self-adaptive high-speed serial data transmission device, the self-adaptive slave node compensates the attenuation of a channel by adopting the mode that the gain sum of the receiving amplifier and the sending amplifier is constant, ensures that the receiving amplitude of the master control node is constant, and expands the dynamic range of signal amplitude attenuation of different nodes of the bus.
In some embodiments, each node further comprises a first transformer;
for the master control node, a first transformer is provided between the amplifier module 303 and the bus 100;
for the adaptive slave node, a first transformer is provided between the amplifier module 403 and the directional coupler module 404.
In some embodiments, the unidirectional input and the reverse input of the transmit amplifier are respectively connected to a first port and a second port of the transceiver, the unidirectional output is connected to a first port of the first transformer, the reverse output is connected to a second port of the first transformer, and the bus port is connected to a first bus port of the digital control module.
Specifically, whether the master node or the self-adaptive slave node, the transmitting amplifier packet has at least 5 ports, which are respectively a same-direction input end, a same-direction output end, a reverse input end, a reverse output end and a bus port.
The unidirectional input end and the reverse input end of the transmitting amplifier are respectively connected with a first port and a second port of the transceiver. The same-direction output end of the transmitting amplifier is connected with the first port of the first transformer, and the reverse output end is connected with the second port of the transformer. The bus port of the transmission amplifier is connected with the first bus port of the digital controller module.
In some embodiments, the unidirectional output and the reverse output of the receiving amplifier are respectively connected with a third port and a fourth port of the transceiver, the unidirectional input is connected with a first port of a first transformer, the reverse output is connected with a first port of the first transformer, and the bus port is connected with a second bus port of the digital control module.
Specifically, the receiving amplifier comprises at least 5 ports, namely a same-direction input end, a same-direction output end, a reverse input end, a reverse output end and a bus port, regardless of a master control node or a self-adaptive slave node.
The same direction output end and the opposite direction output end of the receiving amplifier are respectively connected with a third port and a fourth port of the transceiver. The same-direction input end of the receiving amplifier is connected with the first port of the first transformer, and the reverse output end of the receiving amplifier is connected with the second port of the first transformer. The bus port of the receiving amplifier is connected with the second bus port of the digital control module.
In some embodiments, the first port of the amplitude detector is connected to the unidirectional output port of the receive amplifier, the second port is connected to the reverse output port of the receive amplifier, and the third port is connected to the third bus port of the digital control module.
Specifically, for the self-adaptive slave node, compared with the master control node, an amplitude detector is added, the amplitude detector at least comprises three ports, the first port is connected with the homodromous output port of the receiving amplifier, the second port is connected with the reverse output port of the receiving amplifier and is used for detecting the amplitude of the received signal of the receiving amplifier, and the third port is connected with the third bus port of the digital control module 401 and is used for providing the numerical value of the amplitude of the received signal for the digital control module.
The adaptive high-speed serial data transmission device provided by the application is further described below through embodiments in specific application scenarios.
In the related drawings of the embodiments of the present application, rx represents reception, tx represents transmission, P represents a homodromous terminal, N represents a reverse terminal, and the transformer is composed of two coils (distinguished by N and a number in the drawings).
Example one: differential cable networking
Fig. 5 is a second schematic structural diagram of a master node provided in an embodiment of the present application, and fig. 6 is a second schematic structural diagram of an adaptive slave node provided in an embodiment of the present application, as shown in fig. 5 and fig. 6, in a differential cable network, a workflow of a transmitting path and a receiving path of a branch circuit is as follows:
(1) Transmission path
1. The digital control module port 1 and the port 2 send high-speed differential serial baseband data, the port 1 is a differential p-end, and the port 2 is a differential n-end.
2. The transceivers TR11 and TR2 receive high-speed differential serial baseband data, and the ports 1 and 2 are connected to the digital control module port 1 and the digital control module port 2, respectively.
3. The transceiver TR11 port 5 and port 6 connect port 1 (forward input) and port 2 (reverse input) of the transmit amplifier A1 module.
4. Port 3 (forward output) and port 4 (reverse output) of the transmit amplifier A1 connect switches T11 and T12 (transmit switch on, receive switch off), transmitting high-speed differential serial baseband data to port 1 and port 2 of transformer T11.
5. Load resistors R11 and R12 are connected to port 1 and port 2, respectively, of transformer T11, and the common termination supply voltage VDC11 of R11 and R12 provides the voltage for the transmitter.
6. In the master node, port 3 of the transformer T11 is connected to the BUS bus_n by a cable L11, and port 4 of the transformer T11 is connected to the BUS bus_p by a cable L11.
7. In the adaptive slave node, port 3 of the transformer T11 is connected to port 3 of the directional coupler D11 by a cable L11; port 4 of transformer T11 is connected to port 3 of directional coupler D12 by cable L12.
The directional coupler D11 consists of a transformer T14, a transformer T15 and a load resistor R12 connected with the transformer T14; the directional coupler D12 is composed of a transformer T12, a transformer T13, and a load resistor R11 connected to the transformer T12.
8. In the self-adaptive slave node, a port 1 of a directional coupler D11 is connected with the input end of a BUS BUS_N, a port 2 is connected with one end of a load resistor RD12, and the other end of the load resistor RD12 is grounded; port 1 of the directional coupler D12 is connected to the input terminal of the BUS bus_p, port 2 is connected to one terminal of the load resistor RD11, and the other terminal of the load resistor RD11 is grounded.
9. In the adaptive slave node, high-speed differential serial baseband data is transmitted to port 1 of directional coupler D11 and directional coupler D12.
10. The bus port 5 of the digital control module is connected to the bus port 5 of the transmitting amplifier A1 for adjusting the gain of the amplifier.
(2) Reception path
1. The digital control module port 3 and the port 4 receive high-speed differential serial baseband data, the port 3 is a differential p-end, and the port 4 is a differential n-end.
2. The transceiver TR11 port 3 and port 4 transmit high-speed differential serial baseband data, port 3 is connected to the digital control module port 3, and port 4 is connected to the digital control module port 4.
3. The transceiver TR11 port 7 and port 8 are connected to the port 3 (co-directional output) and the port 4 (counter-directional output) of the receiving amplifier A2, respectively.
4. In the adaptive slave node, the port 1 and the port 2 of the amplitude detector A3 are connected to the port 3 (the co-directional output terminal) and the port 4 (the reverse output terminal) of the receiving amplifier A2, respectively, to detect the amplitude of the received signal.
5. The port 1 (the same-direction input end) and the port 2 (the reverse input end) of the receiving amplifier A2 are respectively connected with the blocking capacitors C11 and C12, and receive the high-speed differential serial baseband data from the port 1 and the port 2 of the transformer T11.
6. In the adaptive slave node, the port 3 and the port 4 of the transformer T11 are connected to the ports 3 of the directional couplers D11 and D12 through the cables L11 and L12, respectively.
7. High-speed differential serial baseband data of BUS bus_p and BUS bus_n are received at ports 1 of directional coupler D11 and directional coupler D12.
8. The bus port 6 of the digital control module is connected to the bus port 5 of the receiving amplifier A2 for adjusting the gain of the receiving amplifier A2.
9. In the adaptive slave node, the bus port 3 of the amplitude detector A3 is connected to the bus port 7 of the digital control module for providing the amplitude value of the received signal.
The connection relation between the master control node and the self-adaptive slave node is different in that: first, the cables L11 and L12 are directly connected to the BUS bus_n and bus_p in the master node, without a directional coupler module. Secondly, the master control node is not provided with an amplitude detector, and the gains of the transmitting amplifier A1 and the receiving amplifier A2 are fixed.
Example two: single-end cable networking
Fig. 7 is a third schematic structural diagram of a master node provided in an embodiment of the present application, and fig. 8 is a third schematic structural diagram of an adaptive slave node provided in an embodiment of the present application, as shown in fig. 7 and fig. 8, in a single-end cable network, a workflow of a transmitting path and a receiving path of a branch circuit is as follows:
(1) Transmission path
1. The digital control module port 1 and the port 2 send high-speed differential serial baseband data, the port 1 is a differential p-end, and the port 2 is a differential n-end.
2. The transceiver TR21 port 1 and port 2 receive high-speed differential serial baseband data, port 1 is connected to the digital control module port 1, and port 2 is connected to the digital control module port 2.
3. The transceiver TR21 port 5 and port 6 are connected to port 1 (forward input) and port 2 (reverse input) of the transmission amplifier A1, respectively.
4. Port 3 (forward output) and port 4 (reverse output) of the transmit amplifier A1 connect switches T21 and T22 (transmit switch on, receive switch off), transmitting high-speed differential serial baseband data to port 1 and port 2 of the transformer T21.
5. Load resistors R21 and R22 are connected to port 1 and port 2, respectively, of transformer T11, and the common termination supply voltage VDC21 of R21 and R22 provides the voltage for the transmitter.
6. In the master node, port 3 of the transformer T21 is connected to the input of the BUS by a cable L21, and port 4 of the transformer T21 is grounded.
7. In the adaptive slave node, port 3 of the transformer T21 is connected to port 3 of the directional coupler D2 by a cable L21, and port 4 of the transformer T21 is grounded. The directional coupler D2 is composed of a transformer T22, a transformer T23, and a load resistor R11 connected to the transformer T22.
8. In the self-adaptive slave node, a port 1 of the directional coupler D2 is connected with the input end of the BUS BUS, a port 2 of the directional coupler D2 is connected with one end of the load resistor RD2, and the other end of the load resistor RD2 is grounded.
9. The high-speed differential serial baseband data is sent to port 1 of directional coupler D2.
10. The bus port 5 of the digital control module is connected with the bus port 5 of the transmitting amplifier A1 and is used for adjusting the gain of the transmitting amplifier.
(2) Reception path
1. The digital control module port 3 and the port 4 receive high-speed differential serial baseband data, the port 3 is a differential p-end, and the port 4 is a differential n-end.
2. The transceiver TR21 module port 3 and port 4 transmit high-speed differential serial baseband data, port 3 is connected to the digital control module port 3, and port 4 is connected to the digital control module port 4.
3. The transceiver TR21 module ports 7 and 8 connect port 3 (forward output) and port 4 (reverse output) of the receive amplifier A2.
4. In the adaptive slave node, the port 1 and the port 2 of the amplitude detector A3 are connected to the port 3 (forward output) and the port 4 (reverse output) of the receiving amplifier A2, respectively, and detect the received signal amplitude of the receiving amplifier A2.
5. The port 1 and the port 2 of the receiving amplifier A2 are respectively connected with the blocking capacitors C21 and C22, and receive the high-speed differential serial baseband data from the port 1 and the port 2 of the transformer T21.
6. In the adaptive slave node, port 3 of the transformer T21 is connected to port 3 of the directional coupler D2 by a cable L21. High-speed differential serial baseband data of the BUS at port 1 of the directional coupler D2 is received.
For the master node, the connection is different only in that the cable L21 is directly connected to the BUS.
7. The bus port 6 of the digital control module is connected to the bus port 5 of the receiving amplifier A2 for adjusting the gain of the amplifier.
8. In the adaptive slave node, the bus port 3 of the amplitude detector A3 is connected to the bus port 7 of the digital control module for providing the amplitude value of the received signal.
The gains of the transmitting amplifier of the master control node are fixed in both differential cable networking and single-end cable networking, and then the gains of the transmitting amplifier and the receiving amplifier of the self-adaptive slave node are adjusted, specifically as follows:
(1) The port 7 of the digital control module receives the magnitude value of the received signal provided by the port 3 of the magnitude detector A3, and then compares the magnitude value with a preset value to see whether the difference (absolute value) between the magnitude value and the preset value is smaller than a target value (for example, 1 db), and if the magnitude value is larger than the target value, the gain adjustment of the amplifier is performed on the port 5 of the receiving amplifier A2 through the port 6 of the digital control module until the difference value between the magnitude value and the preset value is not larger than the target value.
(2) And determining the gain of the transmitting amplifier A1 according to the gain gear of the receiving amplifier A2 at the moment until the gain sum of the receiving amplifier A2 and the transmitting amplifier A1 is satisfied, and performing the gain adjustment of the transmitting amplifier on the port 5 of the transmitting amplifier A1 through the port 5 of the digital control module, wherein the gain sum of the receiving amplifier A2 and the transmitting amplifier A1 is the gain sum of the receiving amplifier and the transmitting amplifier in the master control node.
Since the slave node transmit gain is adaptive, the master node can obtain a stable receive amplitude when the receive amplifier A2 gain is fixed.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and are not limiting thereof; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims (5)

1. An adaptive high-speed serial data transmission device, comprising:
a plurality of nodes connected in series, each node of the plurality of nodes comprising: the digital control module is connected with the transceiver and the amplifier module in a two-to-two mode, the transceiver is arranged between the digital control module and the amplifier module, the amplifier module is arranged between the transceiver and the bus, and the digital control module is used for adjusting the gain of the amplifier module;
the nodes comprise a main control node and a plurality of self-adaptive slave nodes, the self-adaptive slave nodes further comprise a directional coupler module, and the directional coupler module is arranged between the amplifier module and the bus;
wherein the amplifier module comprises a transmitting amplifier and a receiving amplifier;
in the master control node, the gains of the transmitting amplifier and the receiving amplifier are fixed;
in the case that the node is an adaptive slave node, the adaptive slave node further comprises an amplitude detector, wherein the amplitude detector is arranged between the receiving amplifier and the digital control module; wherein the digital control module is used for adjusting the gain of the amplifier module, and comprises:
determining a difference between the output amplitude of the receiving amplifier detected by the amplitude detector and a preset value;
adjusting the gain of the receiving amplifier until the difference between the output amplitude of the receiving amplifier and the preset value is smaller than or equal to the target value when the difference is larger than the target value;
and adjusting the gain of the transmitting amplifier based on the gain adjusted by the receiving amplifier until the gain sum of the receiving amplifier and the transmitting amplifier is constant, wherein the constant is equal to the gain sum of the amplifier module in the main control node.
2. The adaptive high-speed serial data transmission device of claim 1, wherein each of the nodes further comprises a first transformer;
in the case that the node is a master control node, the first transformer is arranged between the amplifier module and the bus;
in the case where the node is an adaptive slave node, the first transformer is disposed between the amplifier module and the directional coupler module.
3. The adaptive high-speed serial data transmission device according to claim 2, wherein the unidirectional input terminal and the reverse input terminal of the transmitting amplifier are connected to the first port and the second port of the transceiver, respectively, the unidirectional output terminal is connected to the first port of the first transformer, the reverse output terminal is connected to the second port of the first transformer, and the bus port is connected to the first bus port of the digital control module.
4. The adaptive high-speed serial data transmission device according to claim 3, wherein the unidirectional output and the reverse output of the receiving amplifier are respectively connected to the third port and the fourth port of the transceiver, the unidirectional input is connected to the first port of the first transformer, the reverse output is connected to the second port of the first transformer, and the bus port is connected to the second bus port of the digital control module.
5. The adaptive high-speed serial data transmission device according to claim 1, wherein the first port of the amplitude detector is connected to the unidirectional output port of the receive amplifier, the second port is connected to the reverse output port of the receive amplifier, and the third port is connected to the third bus port of the digital control module.
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