Circuit for long-distance signal transmission and switcher

Abstract

The utility model discloses a circuit and a switcher for remote signal transmission, the circuit comprises a distance transmission circuit and a control circuit, the control circuit analyzes a received state switching instruction to obtain state switching information and transmits the state switching information to the distance transmission circuit, and the distance transmission circuit transmits the state switching information to the switcher. The state switching information comprises a transmission control requirement; and the distance transmission circuit is used for executing matched remote transmission processing operation on the input signal of the signal input circuit according to the transmission control requirement, and outputting the signal for executing the remote transmission processing operation to the signal output circuit. According to the utility model, the signal long-distance transmission function can be realized, the switching accuracy and the transmission stability of the signal to be transmitted can be improved, and the working stability of a product for signal transmission can be improved; therefore, the user experience of using the switcher by a user is improved, and the use requirement of the user on long-distance signal transmission is met.

Description

Technical Field

[0001] The utility model relates to the technical field of signal transmission, and in particular to a circuit and a switcher for long-distance signal transmission. Background Art

[0002] At present, with the continuous development of science and technology, the application of electronic equipment is becoming more and more extensive. In the application of electronic equipment, there are signal transmission requirements with different transmission distances. However, when the total line length of the input and output exceeds a certain line length threshold, the product will become unstable, such as screen flickering, poor picture clarity, etc., thereby affecting the signal transmission effect. It can be seen that it is particularly important to provide a new circuit to realize long-distance signal transmission and overcome the problems of short transmission distance and poor output picture clarity of the existing switcher. Utility Model Content

[0003] The utility model provides a circuit and a switcher for long-distance signal transmission, which can realize long-distance signal transmission, thereby overcoming the problems of short transmission distance and poor output picture clarity of the existing switcher.

[0004] In order to solve the above technical problems, the utility model discloses a circuit for long-distance signal transmission in the first aspect, characterized in that the circuit comprises: a distance transmission circuit and a control circuit, wherein:

[0005] The first input end of the control circuit is used to electrically connect to the state switching circuit, the first input end of the distance transmission circuit is electrically connected to the control circuit, the second input end of the distance transmission circuit is used to electrically connect to the signal input circuit, and the first output end of the distance transmission circuit is used to electrically connect to the signal output circuit;

[0006] The control circuit is used to analyze the state switching instruction sent by the state switching circuit, obtain the state switching information of the state switching instruction, and transmit the state switching information to the distance transmission circuit, wherein the state switching information includes the transmission control requirement;

[0007] The distance transmission circuit is used to perform a matching long-distance transmission processing operation on the input signal of the signal input circuit according to the transmission control requirement, and output the signal that performs the long-distance transmission processing operation to the signal output circuit.

[0008] As an optional implementation, in the first aspect of the utility model, the distance transmission circuit includes at least a first signal transmission circuit and / or a second signal transmission circuit;

[0009] The signal input circuit at least includes a first signal input circuit corresponding to the first signal transmission circuit and / or a second signal input circuit corresponding to the second signal transmission circuit;

[0010] The signal output circuit at least includes a first signal output circuit corresponding to the first signal transmission circuit and / or a second signal output circuit corresponding to the second signal transmission circuit;

[0011] in:

[0012] The control end of the first signal transmission circuit is electrically connected to the control circuit, the first input end and the second input end of the first signal transmission circuit are used to be electrically connected to the first signal input circuit, and the first output end of the first signal transmission circuit is used to be electrically connected to the first signal output circuit;

[0013] The control end of the second signal transmission circuit is electrically connected to the control circuit, the first input end, the second input end, the third input end and the fourth input end of the second signal transmission circuit are used to electrically connect to the second signal input circuit, and the first output end, the second output end, the third output end and the fourth output end of the second signal transmission circuit are used to electrically connect to the second signal output circuit;

[0014] The second signal transmission circuit is specifically used to perform a matching long-distance transmission processing operation on the first type signal and / or the second type signal input by the second signal input circuit, and output the first type signal and / or the second type signal that performs the corresponding long-distance transmission processing operation to the second signal output circuit;

[0015] The first signal transmission circuit is specifically used to perform a matching long-distance transmission processing operation on the third type signal input by the first signal input circuit, and output the third type signal that performs the corresponding long-distance transmission processing operation to the first signal output circuit.

[0016] As an optional implementation, in the first aspect of the utility model, the first signal transmission circuit includes a first transmission signal switching circuit, wherein:

[0017] The control end of the first transmission signal switching circuit is electrically connected to the control circuit, the first input end and the second input end of the first transmission signal switching circuit are used to electrically connect to the first signal input circuit, and the first output end of the first transmission signal switching circuit is used to electrically connect to the first signal output circuit.

[0018] As an optional implementation, in the first aspect of the utility model, the second signal input circuit includes at least two second signal input sub-circuits, each of the second signal input sub-circuits includes at least a first output terminal for outputting a first type of signal and a second output terminal for outputting a second type of signal, and the second signal output circuit includes at least three second signal output sub-circuits for inputting a second type of signal and at least one third signal output sub-circuit for inputting a second type of signal, wherein:

[0019] The control end of the second signal transmission circuit is electrically connected to the control circuit, the first input end and the second input end of the second signal transmission circuit are electrically connected to the first output end of the second signal input sub-circuit respectively matching, the third input end and the fourth input end of the second signal transmission circuit are electrically connected to the second output end of the second signal input sub-circuit respectively matching, the first output end, the second output end and the third output end of the second signal transmission circuit are electrically connected to the second signal output sub-circuit respectively matching, and the fourth output end of the second signal transmission circuit is electrically connected to the third signal output sub-circuit.

[0020] As an optional implementation, in the first aspect of the utility model, the second signal transmission circuit includes a second transmission signal switching circuit and a signal branch conversion circuit, and the second transmission signal switching circuit includes at least a first input terminal and a second input terminal for inputting a first type of signal, and a third input terminal and a fourth input terminal for inputting a second type of signal, wherein:

[0021] The control end of the second transmission signal switching circuit is electrically connected to the control circuit, the first input end and the second input end of the second transmission signal switching circuit are electrically connected to the first output end of the second signal input sub-circuit respectively matching, the third input end and the fourth input end of the second transmission signal switching circuit are electrically connected to the second output end of the second signal input sub-circuit respectively matching, the first output end of the second transmission signal switching circuit is electrically connected to the first input end of the signal branch conversion circuit, the first output end, the second output end and the third output end of the signal branch conversion circuit are electrically connected to the second signal output sub-circuit respectively matching, and the fourth output end of the signal branch conversion circuit is electrically connected to the third signal output sub-circuit.

[0022] As an optional implementation, in the first aspect of the utility model, the second signal transmission circuit further includes a first port signal switching circuit corresponding to each of the second signal input sub-circuits, and a second port signal switching circuit corresponding to the third signal output sub-circuit, wherein:

[0023] The input end of each first-port signal switching circuit is electrically connected to the second output end of the second signal input subcircuit matched therewith, and the output end of each first-port signal switching circuit is electrically connected to the third input end and the fourth input end of the second transmission signal switching circuit matched therewith respectively;

[0024] The input end of the second-port signal switching circuit is electrically connected to the fourth output end of the signal branch conversion circuit, and the output end of the second-port signal switching circuit is electrically connected to the third signal output sub-circuit.

[0025] As an optional implementation, in the first aspect of the utility model, the first signal input circuit includes at least two first signal input sub-circuits, and the first signal output circuit includes at least one first signal output sub-circuit, wherein:

[0026] The first input terminal and the second input terminal of the first signal transmission circuit are electrically connected to the output terminals of the first signal input sub-circuit respectively matched with each other, and the first output terminal of the first signal transmission circuit is electrically connected to the input terminal of the first signal output sub-circuit.

[0027] As an optional implementation, in the first aspect of the utility model, the circuit further includes an anti-crosstalk circuit, wherein:

[0028] The first end of the anti-crosstalk circuit is electrically connected to the third input end of the distance transmission circuit, and the second end of the anti-crosstalk circuit is electrically connected to the second output end of the distance transmission circuit;

[0029] And, the circuit further comprises an equalizer configuration circuit, wherein:

[0030] The first end of the equalizer configuration circuit is electrically connected to the first configuration end of the distance transmission circuit;

[0031] And, the circuit also includes a hot plug detection circuit, wherein:

[0032] The first end of the hot plug detection circuit is electrically connected to the fourth input end of the distance transmission circuit, and the second end of the hot plug detection circuit is electrically connected to the third output end of the distance transmission circuit.

[0033] As an optional embodiment, in the first aspect of the utility model, the first transmission signal switching circuit includes a PI3HDX12221 chip, the second transmission signal switching circuit includes an SV7030 chip and an FL7201 chip, the signal branch conversion circuit includes a GL3510 chip, the first port signal switching circuit and the second port signal switching circuit both include a VL162 chip, the first signal input sub-circuit corresponds to an HDMI input circuit, the first signal output sub-circuit corresponds to an HDMI output circuit, the second signal input sub-circuit corresponds to a USB-C input circuit, the second signal output sub-circuit corresponds to a USB3.0 output circuit, and the third signal output sub-circuit corresponds to a USB-C output circuit.

[0034] The second aspect of the utility model discloses a switch, the switch comprises an input port for receiving a video signal, and processes the video signal through a circuit for long-distance signal transmission as disclosed in any one of the first aspects to obtain a target video signal, and comprises an output port for outputting the target video signal;

[0035] Wherein, the input port and / or the output port is an HDMI port and / or a Type-C port.

[0036] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0037] The utility model provides a circuit for long-distance signal transmission, which includes a distance transmission circuit and a control circuit, wherein: the first input end of the control circuit is used to electrically connect to the state switching circuit, the first input end of the distance transmission circuit is electrically connected to the control circuit, the second input end of the distance transmission circuit is used to electrically connect to the signal input circuit, and the first output end of the distance transmission circuit is used to electrically connect to the signal output circuit; the control circuit is used to analyze the state switching instruction sent by the received state switching circuit, obtain the state switching information of the state switching instruction, and transmit the state switching information to the distance transmission circuit, and the state switching information includes the transmission control requirement; the distance transmission circuit is used to perform a matching long-distance transmission processing operation on the input signal of the signal input circuit according to the transmission control requirement, and output the signal performing the long-distance transmission processing operation to the signal output circuit. It can be seen that the utility model can perform a matching long-distance transmission processing operation on the input signal according to the transmission control requirement, can realize the signal long-distance transmission function, is conducive to improving the switching accuracy and transmission stability of the signal to be transmitted, and then is conducive to improving the working stability of the product for the transmission signal, so as to improve the user experience of the user using the switch and meet the user's use requirements for long-distance signal transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0039] Figure 1 It is a structural schematic diagram of a circuit for long-distance signal transmission disclosed in an embodiment of the utility model;

[0040] Figure 2 It is a structural schematic diagram of a control chip disclosed in an embodiment of the utility model;

[0041] Figure 3 It is a structural schematic diagram of a product upgrading circuit disclosed in an embodiment of the utility model;

[0042] Figure 4 It is a structural schematic diagram of an analog digital signal processing circuit disclosed in an embodiment of the utility model;

[0043] Figure 5 It is a structural schematic diagram of a driving capability enhancement circuit disclosed in an embodiment of the utility model;

[0044] Figure 6 It is a structural schematic diagram of another circuit for long-distance signal transmission disclosed in an embodiment of the utility model;

[0045] Figure 7 It is a structural schematic diagram of another circuit for long-distance signal transmission disclosed in an embodiment of the utility model;

[0046] Figure 8 It is a structural schematic diagram of a first switching processing chip disclosed in an embodiment of the utility model;

[0047] Fig. 9 It is a structural schematic diagram of a radiation-proof electrostatic circuit disclosed in an embodiment of the utility model;

[0048] Fig.10 It is a structural schematic diagram of a second signal output subcircuit disclosed in an embodiment of the utility model;

[0049] Fig.11 It is a structural schematic diagram of a third signal output subcircuit disclosed in an embodiment of the utility model;

[0050] Fig.12 It is a structural schematic diagram of a second switching processing chip disclosed in an embodiment of the utility model;

[0051] Fig.13It is a structural schematic diagram of a third switching processing chip disclosed in an embodiment of the utility model;

[0052] Fig.14 It is a structural schematic diagram of a branch conversion chip disclosed in an embodiment of the utility model;

[0053] FIG. 15( a ) is a schematic diagram of the structure of a first port signal switching chip disclosed in an embodiment of the present utility model;

[0054] FIG. 15( b ) is a schematic diagram of the structure of a second port signal switching chip disclosed in an embodiment of the present utility model;

[0055] Fig.16 It is a structural schematic diagram of an electrostatic and surge protection circuit disclosed in an embodiment of the utility model;

[0056] Fig.17 It is a structural schematic diagram of a first signal input subcircuit disclosed in an embodiment of the utility model;

[0057] Fig.18 It is a structural schematic diagram of a first signal output subcircuit disclosed in an embodiment of the utility model;

[0058] Fig.19 It is a structural schematic diagram of a backflow prevention and short circuit protection circuit disclosed in an embodiment of the utility model;

[0059] Fig. 20 It is a structural schematic diagram of a leakage protection circuit disclosed in an embodiment of the utility model;

[0060] Fig.21 It is a structural schematic diagram of another circuit for long-distance signal transmission disclosed in an embodiment of the utility model;

[0061] Fig. 22 It is a structural schematic diagram of an anti-crosstalk circuit disclosed in an embodiment of the utility model;

[0062] Fig.23 It is a structural schematic diagram of an equalizer configuration circuit disclosed in an embodiment of the utility model;

[0063] Fig.24 It is a structural schematic diagram of a hot plug detection circuit disclosed in an embodiment of the utility model;

[0064] Fig.25 It is a schematic diagram of a circuit for long-distance signal transmission disclosed in an embodiment of the utility model;

[0065] Fig.26 It is a structural schematic diagram of a switch disclosed in an embodiment of the utility model;

[0066] Fig. 27 It is a structural schematic diagram of a second signal input subcircuit disclosed in an embodiment of the utility model. DETAILED DESCRIPTION

[0067] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] It should be noted that, unless otherwise clearly specified and limited, the term "electrical connection" in the specification and claims of the utility model and the above-mentioned drawings should be understood in a broad sense. For example, it can be a fixed electrical connection, a detachable electrical connection, or an integral electrical connection; it can be a mechanical electrical connection, an electrical electrical connection, or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, the terms "first", "second", etc. in the specification and claims of the utility model and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. The terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For those of ordinary skill in the art, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0069] Embodiment 1

[0070] See also Figure 1 , Figure 1 This is a schematic diagram of a circuit for long-distance signal transmission disclosed in an embodiment of the utility model. Figure 1 The circuit for long-distance signal transmission described above can be applied to a switch, or to other equipment or devices that require long-distance signal transmission, and the embodiments of the present utility model are not limited thereto. Figure 1 As shown, the circuit includes: a distance transmission circuit 104, a control circuit 102, wherein:

[0071] The first input end of the control circuit 102 is used to electrically connect to the state switching circuit 101, the first input end of the distance transmission circuit 104 is electrically connected to the control circuit 102, the second input end of the distance transmission circuit 104 is used to electrically connect to the signal input circuit 103, and the first output end of the distance transmission circuit 104 is used to electrically connect to the signal output circuit 105;

[0072] The control circuit 102 is used to analyze the state switching instruction sent by the state switching circuit 101, obtain the state switching information of the state switching instruction, and transmit the state switching information to the distance transmission circuit 104, where the state switching information includes the transmission control requirement;

[0073] The distance transmission circuit 104 is used to perform a matching long-distance transmission processing operation on the input signal of the signal input circuit 103 according to the transmission control requirement, and output the signal subjected to the long-distance transmission processing operation to the signal output circuit 105 .

[0074] Optionally, the distance transmission circuit 104 uses a USB-C interface for the upstream and downstream USB input and output interfaces, which is small in size, non-directional, easy to plug and unplug, and can meet the needs of new ultra-thin notebooks on the market. The embodiments of the present utility model are not limited thereto.

[0075] Optionally, a high-performance video processing chip with a Redriver is used. The chip has an internal equalizer gain control that can compensate for insertion loss through channel connection, so that the total length of the front and rear input and output lines can reach about 10 meters when the maximum resolution is 8K output. When the total length exceeds 10 meters, the product will not have abnormalities such as screen flickering, no picture output, poor picture clarity, etc., which is not limited to the embodiments of the utility model.

[0076] Optionally, the state switching circuit 101 can be understood as being used to control the processing switching state of the product, specifically, controlling the product to switch the video signal processing mode or the USB signal switching processing mode, etc.; further, the state switching circuit 101 may include but is not limited to a desktop controller, a button, a Mini USB, etc., and is not limited to this embodiment of the utility model.

[0077] Optionally, the first input terminal of the control circuit 102 may correspond to an IO port of the MCU, which is not limited in the embodiment of the present utility model.

[0078] Optionally, the control circuit 102 is illustrated as follows: it is specifically used to control the video switching processing module (i.e., the first signal transmission circuit 1041 in the distance transmission circuit 104) and the USB switching processing module (i.e., the second signal transmission circuit 1042 in the distance transmission circuit 104), and the signal lines of the desktop controller and the button (i.e., the state switching circuit 101) are connected to the IO port of the MCU to send a signal to the MCU to control the product switching state (i.e., control to the HDMI video signal processing state or the USB signal processing state), which is not limited in the embodiments of the utility model.

[0079] Optionally, the control circuit 102 includes an MCU control chip; optionally, the chip model of the MCU control chip may be an MS8005 control chip, specifically a CX32L003F8P6T chip, or other chips capable of achieving the same control function, which is not limited in the embodiment of the utility model; further, the control chip may refer to Figure 2 As shown, Figure 2 The present invention is a schematic diagram of the structure of a control chip disclosed in an embodiment of the present invention.

[0080] Optionally, a circuit for long-distance signal transmission may also include a product upgrade circuit, which is used to perform a product upgrade operation on the control circuit 102; further, the electrical connection relationship between the product upgrade circuit and each electronic component in the product upgrade circuit can be referred to in Figure 3 As shown, Figure 3 The present invention is a schematic diagram of a product upgrade circuit disclosed in an embodiment of the present utility model.

[0081] Optionally, a circuit for long-distance signal transmission may also include an analog digital signal processing circuit, which is used to perform analog and digital signal processing operations on the signal of the control circuit 102; further, the electrical connection relationship between the analog digital signal processing circuit and the electronic components in the analog digital signal processing circuit can be referred to. Figure 4 As shown, Figure 4 The present invention is a schematic diagram of the structure of an analog digital signal processing circuit disclosed in an embodiment of the present utility model.

[0082] Optionally, a circuit for long-distance signal transmission may further include a driving capability enhancement circuit, which is used to increase the driving capability of the control circuit 102; further, the driving capability enhancement circuit and the electrical connection relationship of each electronic component in the driving capability enhancement circuit can be referred to. Figure 5 As shown, Figure 5 The present invention is a schematic diagram of a driving capability enhancement circuit disclosed in an embodiment of the present utility model.

[0083] It can be seen that the implementation Figure 1 The described circuit for long-distance signal transmission can perform matching long-distance transmission processing operations on input signals according to transmission control requirements, and can realize the long-distance signal transmission function, which is beneficial to improving the switching accuracy and transmission stability of the signal to be transmitted, and further beneficial to improving the working stability of products for transmitting signals, thereby helping to improve the user experience of users using the switch and meet the user's needs for long-distance signal transmission.

[0084] In an alternative embodiment, Figure 6 is a schematic diagram of another circuit structure for long-distance signal transmission disclosed in an embodiment of the utility model, such as Figure 6 As shown, the distance transmission circuit 104 at least includes a first signal transmission circuit 1041 and / or a second signal transmission circuit 1042;

[0085] The signal input circuit 103 at least includes a first signal input circuit 1031 corresponding to the first signal transmission circuit 1041 and / or a second signal input circuit 1032 corresponding to the second signal transmission circuit 1042;

[0086] The signal output circuit 105 at least includes a first signal output circuit 1051 corresponding to the first signal transmission circuit 1041 and / or a second signal output circuit 1052 corresponding to the second signal transmission circuit 1042;

[0087] in:

[0088] The control end of the first signal transmission circuit 1041 is electrically connected to the control circuit 102, the first input end and the second input end of the first signal transmission circuit 1041 are used to electrically connect to the first signal input circuit 1031, and the first output end of the first signal transmission circuit 1041 is used to electrically connect to the first signal output circuit 1051;

[0089] The control end of the second signal transmission circuit 1042 is electrically connected to the control circuit 102, the first input end, the second input end, the third input end and the fourth input end of the second signal transmission circuit 1042 are used to electrically connect to the second signal input circuit 1032, and the first output end, the second output end, the third output end and the fourth output end of the second signal transmission circuit 1042 are used to electrically connect to the second signal output circuit 1052;

[0090] The second signal transmission circuit 1042 is specifically used to perform a matching long-distance transmission processing operation on the first type signal and / or the second type signal input by the second signal input circuit 1032, and output the first type signal and / or the second type signal that performs the corresponding long-distance transmission processing operation to the second signal output circuit 1052;

[0091] The first signal transmission circuit 1041 is specifically used to perform a matching long-distance transmission processing operation on the third type signal input by the first signal input circuit 1031 , and output the third type signal having performed the corresponding long-distance transmission processing operation to the first signal output circuit 1051 .

[0092] Optionally, the first signal input circuit 1031 may correspond to an HDMI signal input circuit; further, the HDMI input port corresponding to the first signal input circuit 1031 may be used to connect to an external signal source with an HDMI interface, which is not limited in the embodiment of the utility model.

[0093] Optionally, the first signal transmission circuit 1041 is used to process the TMDS video signal from the first signal input circuit 1031, and filter out a target video signal from all video signals and output it to the first signal output circuit 1051, which is not limited in the embodiment of the utility model.

[0094] Optionally, the second signal input circuit 1032 may correspond to a USB-C signal input circuit. Furthermore, the USB-C input port corresponding to the second signal input circuit 1032 may be used to connect to an external computer with a TYPE-C interface, which is not limited in the embodiments of the present utility model.

[0095] Optionally, the first signal output circuit 1051 may correspond to an HDMI signal output circuit, and the second signal output circuit 1052 may correspond to a USB3.0-A signal output circuit and / or a USB-C signal output circuit, which is not limited in the embodiment of the utility model.

[0096] Optionally, the first type signal may be a USB2.0 signal, the second type signal may be a USB3.0 signal, and the third type signal may be a TMDS video signal (ie, an HDMI video signal), which is not limited in the embodiment of the present utility model.

[0097] Optionally, the transmission signal at the input end of the first signal transmission circuit 1041 may correspond to a TMDS type signal, and the transmission signal at the output end of the first signal transmission circuit 1041 may correspond to a TMDS type signal, which is not limited in the embodiment of the present utility model.

[0098] Optionally, the transmission signal at the input end of the second signal transmission circuit 1042 may correspond to a USB3.0 type signal or a USB2.0 type signal, and the transmission signal at the output end of the second signal transmission circuit 1042 may correspond to a USB3.0 type signal, which is not limited in the embodiment of the utility model.

[0099] It can be seen that the embodiment of the utility model can perform long-distance transmission processing operations on corresponding types of signals through different signal transmission circuits, and output the processed type of signals to the corresponding signal output circuit 105, and can provide corresponding long-distance transmission processing operations for different types of signals, thereby improving the long-distance transmission processing accuracy, reliability and pertinence of different types of signals, thereby improving the long-distance transmission stability and transmission effect of the signal.

[0100] In another alternative embodiment, Figure 7 1 is a schematic diagram of the structure of another circuit for long-distance signal transmission disclosed in an embodiment of the utility model. The first signal transmission circuit 1041 includes a first transmission signal switching circuit, wherein:

[0101] The control end of the first transmission signal switching circuit is electrically connected to the control circuit 102, the first input end and the second input end of the first transmission signal switching circuit are used to electrically connect to the first signal input circuit 1031, and the first output end of the first transmission signal switching circuit is used to electrically connect to the first signal output circuit 1051.

[0102] Optionally, the first transmission signal switching circuit may include a first switching processing chip; further, the first switching processing chip may specifically be a PI3HDX12221 chip, or may be other chips capable of achieving the same control function, which is not limited in the embodiment of the utility model; further, the first switching processing chip may refer to Figure 8 As shown, Figure 8 It is a structural schematic diagram of a first switching processing chip disclosed in an embodiment of the utility model.

[0103] It can be seen that the embodiment of the utility model can perform signal switching processing operations on the third type of signal through the first transmission signal switching circuit, thereby improving the transmission signal switching targeting and reliability of the third type of signal, and thereby improving the rationality, effectiveness and reliability of the long-distance transmission effect of the third type of signal.

[0104] In yet another optional embodiment, Figure 7 As shown, the second signal input circuit 1032 includes at least two second signal input sub-circuits, each of which includes at least a first output terminal for outputting a first type of signal and a second output terminal for outputting a second type of signal, and the second signal output circuit 1052 includes at least three second signal output sub-circuits for inputting a second type of signal and at least one third signal output sub-circuit for inputting a second type of signal, wherein:

[0105] The control end of the second signal transmission circuit 1042 is electrically connected to the control circuit 102, the first input end and the second input end of the second signal transmission circuit 1042 are electrically connected to the first output end of the second signal input sub-circuit respectively matching, the third input end and the fourth input end of the second signal transmission circuit 1042 are electrically connected to the second output end of the second signal input sub-circuit respectively matching, the first output end, the second output end and the third output end of the second signal transmission circuit 1042 are electrically connected to the second signal output sub-circuit respectively matching, and the fourth output end of the second signal transmission circuit 1042 is electrically connected to the third signal output sub-circuit.

[0106] Optionally, the second signal output subcircuit for inputting the second type of signal may correspond to a USB3.0 output circuit, and the third signal output subcircuit for inputting the second type of signal may correspond to a USB-C output circuit, which is not limited in the embodiment of the utility model.

[0107] Optionally, the first output terminal for outputting the first type of signal can be understood as a port for outputting USB2.0; the second output terminal for outputting the second type of signal can be understood as a port for outputting USB3.0, which is not limited in the embodiment of the utility model.

[0108] Optionally, the second signal output subcircuit for inputting the first type of signal can be understood as a signal output subcircuit for inputting USB2.0; the third signal output subcircuit for inputting the second type of signal can be understood as a signal output subcircuit for inputting USB3.0, which is not limited in the embodiments of the present utility model.

[0109] Optionally, a circuit for long-distance signal transmission may also include an anti-radiation electrostatic circuit, which is used to perform a radiation electrostatic processing operation on the to-be-radiated electrostatic processing signal output by the second signal input circuit 1032; further, the electrical connection relationship between the anti-radiation electrostatic circuit and each electronic component in the anti-radiation electrostatic circuit can be referred to. Fig. 9 As shown, Fig. 9 The present invention is a schematic structural diagram of an anti-radiation electrostatic circuit disclosed in an embodiment of the present utility model.

[0110] Optionally, the electrical connection relationship between the second signal output subcircuit and the electronic components in the second signal output subcircuit can be found in Fig.10 As shown, Fig.10 This is a schematic diagram of the structure of a second signal output subcircuit disclosed in an embodiment of the utility model.

[0111] Optionally, the electrical connection relationship between the third signal output subcircuit and the electronic components in the third signal output subcircuit can be found in Fig.11 As shown, Fig.11 This is a schematic diagram of the structure of a third signal output subcircuit disclosed in an embodiment of the utility model.

[0112] Optionally, the electrical connection relationship between the second signal input subcircuit and each electronic component in the second signal input subcircuit can be referred to in Fig. 27 As shown, Fig. 27 It is a structural schematic diagram of a second signal input subcircuit disclosed in an embodiment of the utility model.

[0113] It can be seen that the embodiment of the utility model can determine the input signal through multiple second signal input sub-circuits and the first output end for outputting the first type of signal and the second output end for outputting the second type of signal, and transmit the input signal to the second signal transmission circuit 1042, and receive the output signal of the second signal transmission circuit 1042 through multiple second signal output sub-circuits for inputting the second type of signal and the third signal output sub-circuit for inputting the second type of signal. It can perform signal input, signal transmission processing and signal output for different types of signals, and is not limited to the signal type in performing signal input, signal transmission processing and signal output, which is conducive to improving the long-distance transmission processing of various types of input signals and the intelligence of long-distance transmission signals, as well as improving the input and output targeting, accuracy and efficiency of different types of signals, and thus is conducive to improving the long-distance transmission effect and stability of the output signal.

[0114] In yet another optional embodiment, Figure 7 As shown, the second signal transmission circuit 1042 includes a second transmission signal switching circuit and a signal branching conversion circuit, and the second transmission signal switching circuit at least includes a first input terminal and a second input terminal for inputting a first type of signal, and a third input terminal and a fourth input terminal for inputting a second type of signal, wherein:

[0115] The control end of the second transmission signal switching circuit is electrically connected to the control circuit 102, the first input end and the second input end of the second transmission signal switching circuit are electrically connected to the first output end of the second signal input sub-circuit respectively matching, the third input end and the fourth input end of the second transmission signal switching circuit are electrically connected to the second output end of the second signal input sub-circuit respectively matching, the first output end of the second transmission signal switching circuit is electrically connected to the first input end of the signal branch conversion circuit, the first output end, the second output end and the third output end of the signal branch conversion circuit are electrically connected to the second signal output sub-circuit respectively matching, and the fourth output end of the signal branch conversion circuit is electrically connected to the third signal output sub-circuit.

[0116] Optionally, the second transmission signal switching circuit may specifically include a first transmission signal switching sub-circuit and a second transmission signal switching sub-circuit; further, the first transmission signal switching sub-circuit, for example, is used to switch and process USB2.0 signals from two USB2.0 input ports, and the USB signals after switching and processing enter the HUB signal processing module (i.e., the signal branch conversion circuit); and the second transmission signal switching sub-circuit, for example, is used to switch and process USB3.0 signals from two USB3.0 input ports, and the USB signals after switching and processing enter the HUB signal processing module (i.e., the signal branch conversion circuit), which is not limited to the embodiments of the present utility model.

[0117] Further, the first transmission signal switching subcircuit may include a second switching processing chip, which may be a SV7030 chip or other chips capable of achieving the same function, which is not limited in the embodiment of the utility model; further, the second switching processing chip may refer to Fig.12 As shown, Fig.12 It is a structural schematic diagram of a second switching processing chip disclosed in an embodiment of the utility model.

[0118] Further, the second transmission signal switching subcircuit may include a third switching processing chip; further, the third switching processing chip may specifically be a FL7201 chip, or may be other chips that can achieve the same function, which is not limited in the embodiment of the utility model; further, the third switching processing chip may refer to Fig.13 As shown, Fig.13 It is a structural schematic diagram of a third switching processing chip disclosed in an embodiment of the utility model.

[0119] Optionally, the signal split conversion circuit includes a split conversion chip; further, the split conversion chip may be a GL3510 chip, or other chips that can achieve the same control function, which is not limited in the embodiment of the utility model; further, the split conversion chip may refer to Fig.14 As shown, Fig.14 The present invention is a schematic structural diagram of a branch conversion chip disclosed in an embodiment of the present utility model.

[0120] Optionally, the signal split conversion circuit, for example, can be composed of a high-speed HUB chip GL3510. The signal after input into GL3510 is converted from a single channel to a four-channel USB3.0 signal, three of which are output from the USB3.0 interface output port, and one channel is output to the USB-C output interface after passing through the USB-C forward and reverse plug switching chip VL162 (i.e., the port signal switching circuit). The embodiment of the utility model is not limited to this.

[0121] It can be seen that the embodiments of the utility model can perform corresponding long-distance transmission processing operations on the first type of signal and the second type of signal through the second transmission signal switching circuit and the signal branch conversion circuit, and input signals through multiple input terminals for inputting the first type of signal and multiple input terminals for inputting the second type of signal, thereby improving the comprehensiveness and integrity of the second transmission signal switching circuit, thereby improving the transmission signal switching targeting, accuracy and reliability of the first type of signal and the second type of signal, and improving the targeting and diversity of the input terminal of the second transmission signal switching circuit, so that signal input and signal long-distance transmission processing can be performed without being limited to the signal type, and the intelligence of signal input and long-distance transmission processing for multiple and various types of input signals is improved.

[0122] In yet another optional embodiment, Figure 7 As shown, the second signal transmission circuit 1042 further includes a first port signal switching circuit corresponding to each second signal input sub-circuit, and a second port signal switching circuit corresponding to the third signal output sub-circuit, wherein:

[0123] The input end of each first port signal switching circuit is electrically connected to the second output end of the second signal input subcircuit matched therewith, and the output end of each first port signal switching circuit is electrically connected to the third input end and the fourth input end of the second transmission signal switching circuit matched therewith respectively;

[0124] The input end of the second port signal switching circuit is electrically connected to the fourth output end of the signal branch conversion circuit, and the output end of the second port signal switching circuit is electrically connected to the third signal output sub-circuit.

[0125] Optionally, the first port signal switching circuit and the second port signal switching circuit, for example, can both be used to switch USB3.0 signals output from the USB-C port, and the embodiments of the present utility model are not limited thereto.

[0126] Optionally, the first port signal switching circuit may include a first port signal switching chip, which may specifically be a VL162 chip, or may be other chips that can achieve the same function, which is not limited in the embodiments of the present invention; and, the second port signal switching circuit may include a second port signal switching chip, which may specifically be a VL162 chip, or may be other chips that can achieve the same function, which is not limited in the embodiments of the present invention.

[0127] Furthermore, the first port signal switching chip can refer to Figure 15(a), and the second port signal switching chip can refer to Figure 15(b). Figure 15(a) is a structural schematic diagram of a first port signal switching chip disclosed in an embodiment of the utility model, and Figure 15(b) is a structural schematic diagram of a second port signal switching chip disclosed in an embodiment of the utility model.

[0128] It can be seen that the embodiment of the utility model can perform long-distance signal processing operations through the first port signal switching circuit corresponding to the second signal input sub-circuit and the second port signal switching circuit corresponding to the third signal output sub-circuit, which is beneficial to improving the signal processing pertinence and accuracy of the first port signal switching circuit and the second port signal switching circuit, and is also beneficial to improving the comprehensiveness and integrity of the second signal transmission circuit 1042, thereby helping to improve the comprehensiveness and accuracy of long-distance transmission processing of the first type of signal and the second type of signal.

[0129] In yet another optional embodiment, Figure 7As shown, the first signal input circuit 1031 includes at least two first signal input sub-circuits, and the first signal output circuit 1051 includes at least one first signal output sub-circuit, wherein:

[0130] The first input terminal and the second input terminal of the first signal transmission circuit 1041 are electrically connected to the output terminals of the first signal input sub-circuit respectively matched with each other, and the first output terminal of the first signal transmission circuit 1041 is electrically connected to the input terminal of the first signal output sub-circuit.

[0131] Optionally, a circuit for long-distance signal transmission may further include an electrostatic and surge protection circuit, which is used to perform electrostatic and surge protection operations on the signal output by the first signal input circuit 1031; further, the electrostatic and surge protection circuit and the electrical connection relationship between the electronic components in the electrostatic and surge protection circuit can be referred to. Fig.16 As shown, Fig.16 The present invention is a schematic diagram of a structure of an electrostatic and surge protection circuit disclosed in an embodiment of the present utility model.

[0132] Optionally, the electrical connection relationship between the first signal input subcircuit and the electronic components in the first signal input subcircuit can be referred to in Fig.17 As shown, Fig.17 This is a schematic diagram of the structure of a first signal input subcircuit disclosed in an embodiment of the utility model.

[0133] Optionally, the electrical connection relationship between the first signal output subcircuit and each electronic component in the first signal output subcircuit can refer to Fig.18 As shown, Fig.18 This is a schematic diagram of the structure of a first signal output subcircuit disclosed in an embodiment of the utility model.

[0134] Optionally, a circuit for long-distance signal transmission may further include an anti-backflow and short-circuit protection circuit, which is used to perform anti-backflow and short-circuit protection operations on the second signal transmission circuit 1042 and the second signal output circuit 1052; further, the electrical connection relationship between the anti-backflow and short-circuit protection circuit and the electronic components in the circuit can be referred to. Fig.19 As shown, Fig.19 The present invention is a schematic structural diagram of a backflow prevention and short-circuit protection circuit disclosed in an embodiment of the present utility model.

[0135] Optionally, a circuit for long-distance signal transmission may further include a leakage protection circuit, which is used to perform leakage prevention and chip protection operations on the second signal transmission circuit 1042 and the second signal output circuit 1052; further, the electrical connection relationship between the leakage protection circuit and the electronic components in the leakage protection circuit can be referred to. Fig. 20 As shown, Fig. 20The present invention is a schematic diagram of a leakage protection circuit disclosed in an embodiment of the present utility model.

[0136] It can be seen that the embodiment of the utility model can determine the input signal through multiple first signal input sub-circuits and input the input signal into the first signal transmission circuit 1041. The first signal transmission circuit 1041 transmits the signal after long-distance transmission processing to the first signal output sub-circuit. It can perform long-distance transmission processing and output of the input signal without being limited by the number of first signal input sub-circuits, which is beneficial to improving the intelligence of long-distance transmission processing and output of multiple input signals, and further beneficial to improving the long-distance transmission effect of the output signal.

[0137] In yet another optional embodiment, Fig.21 is a schematic diagram of the structure of another circuit for long-distance signal transmission disclosed in an embodiment of the utility model, such as Fig.21 As shown, a circuit for long-distance signal transmission also includes an anti-crosstalk circuit 106, wherein:

[0138] A first end of the anti-crosstalk circuit 106 is electrically connected to the third input end of the distance transmission circuit 104 , and a second end of the anti-crosstalk circuit 106 is electrically connected to the second output end of the distance transmission circuit 104 .

[0139] Optionally, the anti-crosstalk circuit 106 is used to perform an anti-crosstalk operation on the distance transmission circuit 104, which is not limited in the embodiment of the utility model.

[0140] Optionally, the electrical connection relationship between the anti-crosstalk circuit 106 and the electronic components in the anti-crosstalk circuit 106 can be found in Fig. 22 As shown, Fig. 22 It is a structural schematic diagram of an anti-crosstalk circuit 106 disclosed in an embodiment of the utility model.

[0141] It can be seen that the embodiment of the utility model can perform anti-crosstalk operation on the distance transmission circuit through the anti-crosstalk circuit 106, which is beneficial to improving the signal transmission stability and signal transmission quality of the distance transmission circuit, reducing the channel noise interference of the distance transmission circuit, and to a certain extent, it is beneficial to improve the signal processing reliability and efficiency of the distance transmission circuit.

[0142] In yet another optional embodiment, Fig.21 As shown, a circuit for long-distance signal transmission also includes an equalizer configuration circuit 107, wherein:

[0143] A first terminal of the equalizer configuration circuit 107 is electrically connected to a first configuration terminal of the distance transmission circuit 104 .

[0144] Optionally, the equalizer configuration circuit 107 is used to implement an equalizer configuration selection operation for the distance transmission circuit 104, which is not limited in the embodiment of the present utility model.

[0145] Optionally, the electrical connection relationship between the equalizer configuration circuit 107 and the electronic components in the equalizer configuration circuit 107 can be found in Fig.23 As shown, Fig.23 It is a structural diagram of an equalizer configuration circuit 107 disclosed in an embodiment of the utility model.

[0146] It can be seen that the embodiment of the utility model can realize the equalizer configuration selection function through the equalizer configuration circuit 107, which is conducive to coping with signals of different frequencies and performing signal amplification processing on electrical signals of different frequencies, which can improve the selectivity and pertinence of the configurator, and is conducive to improving the effectiveness and accuracy of signal application in the distance transmission circuit.

[0147] In yet another optional embodiment, Fig.21 As shown, a circuit for long-distance signal transmission also includes a hot plug detection circuit 108, wherein:

[0148] A first terminal of the hot plug detection circuit 108 is electrically connected to the fourth input terminal of the distance transmission circuit 104 , and a second terminal of the hot plug detection circuit 108 is electrically connected to the third output terminal of the distance transmission circuit 104 .

[0149] Optionally, the hot plug detection circuit 108 is used to perform a hot plug detection operation on the distance transmission circuit 104, which is not limited in the embodiment of the present utility model.

[0150] Optionally, the electrical connection relationship between the hot plug detection circuit 108 and the electronic components in the hot plug detection circuit 108 can be referred to in Fig.24 As shown, Fig.24 It is a structural schematic diagram of a hot plug detection circuit 108 disclosed in an embodiment of the utility model.

[0151] It can be seen that the embodiment of the utility model can realize the circuit protection function through the hot plug detection circuit 108, delay the startup time, reduce the impact of instantaneous current / voltage on the distance transmission circuit, improve the operation stability and operation reliability of the distance transmission circuit, and improve the signal processing effect, signal processing efficiency and accuracy of the distance transmission circuit.

[0152] In another optional embodiment, the first transmission signal switching circuit includes a PI3HDX12221 chip, the second transmission signal switching circuit includes an SV7030 chip and a FL7201 chip, the signal branching conversion circuit includes a GL3510 chip, the first port signal switching circuit and the second port signal switching circuit both include a VL162 chip, the first signal input subcircuit corresponds to the HDMI input circuit, the first signal output subcircuit corresponds to the HDMI output circuit, the second signal input subcircuit corresponds to the USB-C input circuit, the second signal output subcircuit corresponds to the USB3.0 output circuit, and the third signal output subcircuit corresponds to the USB-C output circuit.

[0153] It can be seen that the embodiment of the utility model can realize long-distance signal transmission through the PI3HDX12221 chip included in the first transmission signal switching circuit, the SV7030 chip and the FL7201 chip included in the second transmission signal switching circuit, the GL3510 chip included in the signal branch conversion circuit, and the VL162 chip included in the first port signal switching circuit and the second port signal switching circuit. It can realize long-distance transmission processing of different types of signals (such as HDMI signals, USB signals), meet the user's usage needs, and improve the stability and reliability of long-distance signal transmission.

[0154] In yet another optional embodiment, Fig.25 As shown, Fig.25It is an architecture diagram of a circuit for long-distance signal transmission disclosed in an embodiment of the utility model, wherein when the number of first signal input sub-circuits is 2, the first signal input sub-circuits are HDMIIN1 and HDMIIN2 respectively; when the number of second signal input sub-circuits is 2, the second signal input sub-circuits are USB-C IN1 and USB-C IN2 respectively; when the number of first signal output sub-circuits is 1, the first signal output sub-circuits are HDMIOUT; when the number of second signal output sub-circuits is 3, the second signal output sub-circuits are USB3.0-A OUT1, USB3.0-AOUT2 and USB3.0-AOUT3 respectively; when the number of third signal output sub-circuits is 1, the third signal output sub-circuits are USB-C OUT; when the distance transmission circuit includes the first signal transmission circuit 1041 and the second signal transmission circuit 1042, TMDSSwitch (corresponding to the PI3HDX12221 chip) is the first transmission signal switching circuit, USB2.0&USB3.0 Switch (corresponding to SV7030 chip and FL7201 chip) is the second transmission signal switching circuit, GL3510 is the signal branching conversion circuit, and the VL162 chip electrically connected to USB-C IN1 and USB-C IN2 is the first port signal switching circuit. The VL162 chip electrically connected to OUT is the second port signal switching circuit; each first signal input sub-circuit transmits a TMDS signal to the first transmission signal switching circuit; the first transmission signal switching circuit transmits a TMDS signal to the first signal output sub-circuit; for each second signal input sub-circuit, one end of the second signal input sub-circuit transmits a USB2.0 signal to the second transmission signal switching circuit, and the other end of the second signal input sub-circuit transmits a USB3.0 signal to its corresponding first port signal switching circuit, and the other end of the first port signal switching circuit transmits a USB3.0 signal to the second transmission signal switching circuit; another end of the second transmission signal switching circuit transmits a USB3.0 / 2.02 signal to the signal branch switching circuit; the first output end, the second output end and the third output end of the signal branch switching circuit transmit USB3.0 signals to the corresponding second signal output sub-circuit respectively; the fourth output end of the signal branch switching circuit transmits a USB3.0 signal to the second port signal switching circuit; the other end of the second port signal switching circuit transmits a USB3.0 signal to the third signal output sub-circuit; MCU is a control circuit, Mini USB and KEY are state switching circuits, and the electrical connection between the state switching circuit and the control circuit is through IO connection, which is not limited in the embodiment of the utility model.

[0155] It should be noted that the specific numerical values ​​in the above optional embodiments and the specific numerical values ​​in the corresponding drawings are only examples, and can also be set to other values ​​according to actual conditions, and the embodiments of the present utility model are not limited thereto.

[0156] Embodiment 2

[0157] See also Fig.26 , Fig.26 It is a structural schematic diagram of a switch disclosed in an embodiment of the utility model, the switch includes an input port for receiving a video signal, and processes the video signal through any circuit for long-distance signal transmission as in Embodiment 1 to obtain a target video signal, and includes an output port for outputting the target video signal; wherein the input port and / or the output port is an HDMI port and / or a Type-C port. And the functions that can be realized by the switch include but are not limited to the ability to realize long-distance transmission of signals from different chips. It should be noted that for a detailed description of a circuit for long-distance signal transmission, please refer to the specific description of the relevant content in Embodiment 1, which will not be repeated in this embodiment.

[0158] It can be seen that the implementation Fig.26 The described switch can perform matching long-distance transmission processing operations on the input signal according to the transmission control requirements, and can realize the signal long-distance transmission function, which is beneficial to improve the switching accuracy and transmission stability of the signal to be transmitted, and then help improve the working stability of the product for transmitting signals, thereby helping to improve the user experience of users using the switch and meet the user's needs for long-distance signal transmission.

[0159] The above is a detailed introduction to a circuit and a switch for long-distance signal transmission disclosed in an embodiment of the utility model. The principle and implementation method of the utility model are explained in this article using specific embodiments. However, the above preferred embodiments are not used to limit the utility model. The description of the above embodiments is only used to help understand the method of the utility model and its core idea. At the same time, for a person skilled in the art, based on the idea of ​​the utility model, there will be changes in the specific implementation method and the scope of application without departing from the spirit and scope of the utility model. Therefore, the scope of protection of the utility model shall be based on the scope defined in the claims.

Claims

1. A circuit for long-distance signal transmission, characterized in that: The circuit comprises: a distance transmission circuit and a control circuit, wherein: The first input end of the control circuit is used to electrically connect to the state switching circuit, the first input end of the distance transmission circuit is electrically connected to the control circuit, the second input end of the distance transmission circuit is used to electrically connect to the signal input circuit, and the first output end of the distance transmission circuit is used to electrically connect to the signal output circuit; The control circuit is used to analyze the state switching instruction sent by the state switching circuit, obtain the state switching information of the state switching instruction, and transmit the state switching information to the distance transmission circuit, wherein the state switching information includes the transmission control requirement; The distance transmission circuit is used to perform a matching long-distance transmission processing operation on the input signal of the signal input circuit according to the transmission control requirement, and output the signal that performs the long-distance transmission processing operation to the signal output circuit.

2. A circuit for long-distance signal transmission according to claim 1, characterized in that: The distance transmission circuit includes at least a first signal transmission circuit and / or a second signal transmission circuit; The signal input circuit at least includes a first signal input circuit corresponding to the first signal transmission circuit and / or a second signal input circuit corresponding to the second signal transmission circuit; The signal output circuit at least includes a first signal output circuit corresponding to the first signal transmission circuit and / or a second signal output circuit corresponding to the second signal transmission circuit; in: The control end of the first signal transmission circuit is electrically connected to the control circuit, the first input end and the second input end of the first signal transmission circuit are used to be electrically connected to the first signal input circuit, and the first output end of the first signal transmission circuit is used to be electrically connected to the first signal output circuit; The control end of the second signal transmission circuit is electrically connected to the control circuit, the first input end, the second input end, the third input end and the fourth input end of the second signal transmission circuit are used to electrically connect to the second signal input circuit, and the first output end, the second output end, the third output end and the fourth output end of the second signal transmission circuit are used to electrically connect to the second signal output circuit; The second signal transmission circuit is specifically used to perform a matching long-distance transmission processing operation on the first type signal and / or the second type signal input by the second signal input circuit, and output the first type signal and / or the second type signal that performs the corresponding long-distance transmission processing operation to the second signal output circuit; The first signal transmission circuit is specifically used to perform a matching long-distance transmission processing operation on the third type signal input by the first signal input circuit, and output the third type signal that performs the corresponding long-distance transmission processing operation to the first signal output circuit.

3. A circuit for long-distance signal transmission according to claim 2, characterized in that: The first signal transmission circuit includes a first transmission signal switching circuit, wherein: The control end of the first transmission signal switching circuit is electrically connected to the control circuit, the first input end and the second input end of the first transmission signal switching circuit are used to electrically connect to the first signal input circuit, and the first output end of the first transmission signal switching circuit is used to electrically connect to the first signal output circuit.

4. A circuit for long-distance signal transmission according to claim 3, characterized in that: The second signal input circuit includes at least two second signal input sub-circuits, each of which includes at least a first output terminal for outputting a first type of signal and a second output terminal for outputting a second type of signal, and the second signal output circuit includes at least three second signal output sub-circuits for inputting a second type of signal and at least one third signal output sub-circuit for inputting a second type of signal, wherein: The control end of the second signal transmission circuit is electrically connected to the control circuit, the first input end and the second input end of the second signal transmission circuit are electrically connected to the first output end of the second signal input sub-circuit respectively matching, the third input end and the fourth input end of the second signal transmission circuit are electrically connected to the second output end of the second signal input sub-circuit respectively matching, the first output end, the second output end and the third output end of the second signal transmission circuit are electrically connected to the second signal output sub-circuit respectively matching, and the fourth output end of the second signal transmission circuit is electrically connected to the third signal output sub-circuit.

5. A circuit for long-distance signal transmission according to claim 4, characterized in that: The second signal transmission circuit includes a second transmission signal switching circuit and a signal branch conversion circuit, and the second transmission signal switching circuit includes at least a first input terminal and a second input terminal for inputting a first type of signal, and a third input terminal and a fourth input terminal for inputting a second type of signal, wherein: The control end of the second transmission signal switching circuit is electrically connected to the control circuit, the first input end and the second input end of the second transmission signal switching circuit are electrically connected to the first output end of the second signal input sub-circuit respectively matching, the third input end and the fourth input end of the second transmission signal switching circuit are electrically connected to the second output end of the second signal input sub-circuit respectively matching, the first output end of the second transmission signal switching circuit is electrically connected to the first input end of the signal branch conversion circuit, the first output end, the second output end and the third output end of the signal branch conversion circuit are electrically connected to the second signal output sub-circuit respectively matching, and the fourth output end of the signal branch conversion circuit is electrically connected to the third signal output sub-circuit.

6. A circuit for long-distance signal transmission according to claim 5, characterized in that: The second signal transmission circuit further includes a first port signal switching circuit corresponding to each of the second signal input sub-circuits, and a second port signal switching circuit corresponding to the third signal output sub-circuit, wherein: The input end of each first-port signal switching circuit is electrically connected to the second output end of the second signal input subcircuit matched therewith, and the output end of each first-port signal switching circuit is electrically connected to the third input end and the fourth input end of the second transmission signal switching circuit matched therewith respectively; The input end of the second-port signal switching circuit is electrically connected to the fourth output end of the signal branch conversion circuit, and the output end of the second-port signal switching circuit is electrically connected to the third signal output sub-circuit.

7. A circuit for long-distance signal transmission according to claim 6, characterized in that: The first signal input circuit includes at least two first signal input sub-circuits, and the first signal output circuit includes at least one first signal output sub-circuit, wherein: The first input terminal and the second input terminal of the first signal transmission circuit are electrically connected to the output terminals of the first signal input sub-circuit respectively matched with each other, and the first output terminal of the first signal transmission circuit is electrically connected to the input terminal of the first signal output sub-circuit.

8. A circuit for long-distance signal transmission according to claim 3 or 7, characterized in that: The circuit also includes an anti-crosstalk circuit, wherein: The first end of the anti-crosstalk circuit is electrically connected to the third input end of the distance transmission circuit, and the second end of the anti-crosstalk circuit is electrically connected to the second output end of the distance transmission circuit; And, the circuit further comprises an equalizer configuration circuit, wherein: The first end of the equalizer configuration circuit is electrically connected to the first configuration end of the distance transmission circuit; And, the circuit also includes a hot plug detection circuit, wherein: The first end of the hot plug detection circuit is electrically connected to the fourth input end of the distance transmission circuit, and the second end of the hot plug detection circuit is electrically connected to the third output end of the distance transmission circuit.

9. The circuit for long-distance signal transmission according to claim 7, characterized in that: The first transmission signal switching circuit includes a PI3HDX12221 chip, the second transmission signal switching circuit includes an SV7030 chip and a FL7201 chip, the signal branch conversion circuit includes a GL3510 chip, the first port signal switching circuit and the second port signal switching circuit both include a VL162 chip, the first signal input sub-circuit corresponds to an HDMI input circuit, the first signal output sub-circuit corresponds to an HDMI output circuit, the second signal input sub-circuit corresponds to a USB-C input circuit, the second signal output sub-circuit corresponds to a USB3.0 output circuit, and the third signal output sub-circuit corresponds to a USB-C output circuit.

10. A switch, characterized in that: The switch includes an input port for receiving a video signal, and processes the video signal to obtain a target video signal by a circuit for long-distance signal transmission according to any one of claims 1 to 9, and includes an output port for outputting the target video signal; Wherein, the input port and / or the output port is an HDMI port and / or a Type-C port.

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