HDMI (High Definition Multimedia Interface) signal bidirectional transmission amplifying circuit

Abstract

The utility model discloses an HDMI (High Definition Multimedia Interface) signal two-way transmission amplifying circuit which comprises a main control unit, a level conversion unit, a voltage stabilizing unit and a transmission amplifying unit, the main control unit is electrically connected with the level conversion unit and is used for constructing communication connection and converting the level format of the video signal; the voltage stabilizing unit regulates and controls the voltage parameter of the video signal; and the main control unit is also electrically connected with the transmission amplification unit and controls the transmission amplification unit to select one port to output the video signal. Therefore, level conversion and voltage stabilization are carried out on the received video signal, and the amplification chip corresponding to the output port is selected to carry out gain amplification and output on the video signal according to the input port of the video signal, so that bidirectional transmission amplification of the cable is realized, the output end and the input end do not need to be distinguished, and plug-and-play is realized; the construction convenience is greatly improved, and the rework rate is reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electronic circuits, in particular to an HDMI signal bidirectional transmission amplification circuit. BACKGROUND

[0002] Since the transmission process of the HDMI signal does not need to receive feedback data from the receiving device, the existing HDMI signal transmission cable can only perform signal unidirectional transmission for the purpose of reducing design difficulty and production cost, which makes it different from the conventional cable and needs to accurately identify the laying direction of the cable during wiring construction. If the cable transmission direction mark is contaminated or the constructor does not pay attention to the wiring requirement, the HDMI signal transmission cable after wiring may not work and needs to be returned to work. SUMMARY

[0003] The application discloses an HDMI signal bidirectional transmission amplification circuit, which specifically comprises the following contents.

[0004] The main control unit, the level conversion unit, the voltage stabilization unit and the transmission amplification unit;

[0005] The main control unit is electrically connected with the level conversion unit to build a communication connection and convert the level format of the video signal.

[0006] The voltage stabilization unit regulates the voltage parameter of the video signal.

[0007] The main control unit is also electrically connected with the transmission amplification unit to control the transmission amplification unit to output the video signal from a selected port.

[0008] Preferably, the main control unit builds a handshake channel for the signal source device and the signal receiving device.

[0009] Preferably, the main control unit adopts a transistor T1 and a transistor T2, wherein the gate of the transistor T1 is connected with the drain of the transistor T2.

[0010] Preferably, the level conversion unit adopts a conversion chip U3, the fifth pin of which is used to output the serial data after level conversion, and the sixth pin of which is used to output the clock data after level conversion.

[0011] Preferably, the voltage stabilization unit adopts a voltage stabilization chip U1, the first pin of which is connected with a primary power supply through a resistor FB5, and the third pin of which is connected with a secondary power supply through a resistor FB4 to regulate the voltage parameter of the video signal.

[0012] Preferably, the transmission amplification unit comprises an amplification chip U2 and an amplification chip U4.

[0013] Both the amplification chip U2 and the amplification chip U4 are used for gain amplification of the video signal.

[0014] Preferably, the amplification chip U2 is used to output the gain-amplified video signal to one end of the cable;

[0015] The amplification chip U4 is used to output the gain-amplified video signal to the other end of the cable.

[0016] Preferably, the master control unit selects the amplification chip U2 or U4 corresponding to the output port according to the input port of the video signal, and outputs the gain-amplified video signal.

[0017] Compared with the prior art, the embodiment of the present application has the following beneficial effects:

[0018] In addition to the level conversion and voltage stabilization of the received video signal, the gain-amplified video signal is outputted according to the input port of the video signal, so that the cable realizes bidirectional transmission amplification, and there is no need to distinguish the output end and the input end, that is, plug and play, which greatly improves the convenience of construction and reduces the rework rate. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0020] Fig. 1 is a circuit principle schematic diagram of a master control unit in an HDMI signal bidirectional transmission amplification circuit disclosed by the embodiment of the present application;

[0021] Fig. 2 is a circuit principle schematic diagram of a level conversion unit in an HDMI signal bidirectional transmission amplification circuit disclosed by the embodiment of the present application;

[0022] Fig. 3 is a circuit principle schematic diagram of a voltage stabilization unit in an HDMI signal bidirectional transmission amplification circuit disclosed by the embodiment of the present application;

[0023] Fig. 4 is a circuit principle schematic diagram of a transmission amplification unit in an HDMI signal bidirectional transmission amplification circuit disclosed by the embodiment of the present application. DETAILED DESCRIPTION

[0024] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0025] Please refer to Figs. 1-4 The HDMI signal bidirectional transmission amplification circuit can include the following.

[0026] The main control unit, the level conversion unit, the voltage stabilization unit and the transmission amplification unit;

[0027] The main control unit is electrically connected with the level conversion unit, to build a communication connection and convert the level format of the video signal;

[0028] The voltage stabilization unit regulates the voltage parameter of the video signal;

[0029] The main control unit is also electrically connected with the transmission amplification unit, to control the transmission amplification unit to output the video signal from a selected port.

[0030] Here, the video signal can be input from any port of the cable, and then the level conversion and voltage stabilization are performed, and then the main control unit determines the amplification chip corresponding to the output port according to the input port, and the video signal is amplified by the amplification chip and output from the output port.

[0031] That is, two independent amplification chips are used to output the video signal to both ends of the cable, and the video signal can be input from both ends of the cable, so that the cable realizes bidirectional transmission amplification, and there is no need to distinguish the output end and the input end, that is, it can be used as soon as it is plugged in, greatly improving the convenience of construction and reducing the rework rate.

[0032] In this embodiment, the main control unit builds a handshake channel for the signal source device and the signal receiving device.

[0033] In this embodiment, the main control unit uses a transistor T1 and a transistor T2, wherein the gate of the transistor T1 is connected to the drain of the transistor T2.

[0034] In this embodiment, the level conversion unit uses a conversion chip U3, the 5th pin of which is used to output the level-converted serial data, and the 6th pin of which is used to output the level-converted clock data.

[0035] Here, the serial data and the clock data are independently processed during the level conversion process and are output through independent ports, avoiding compatibility problems caused by protocol missing or the like.

[0036] In the embodiment, the voltage stabilizing unit adopts voltage stabilizing chip U1, the first pin of which is connected with the first power supply through resistor FB5, and the third pin of which is connected with the second power supply through resistor FB4, so as to regulate the voltage parameter of the video signal.

[0037] In the embodiment, the transmission amplifying unit includes amplifying chip U2 and amplifying chip U4.

[0038] Both the amplifying chip U2 and the amplifying chip U4 are used for gain amplifying the video signal.

[0039] In the embodiment, the amplifying chip U2 is used for outputting the video signal which has been gain amplified to one end of the cable.

[0040] The amplifying chip U4 is used for outputting the video signal which has been gain amplified to the other end of the cable.

[0041] In the embodiment, the main control unit selects the amplifying chip U2 or the amplifying chip U4 corresponding to the output port according to the input port of the video signal, and then gain amplifies and outputs the video signal.

[0042] In the actual construction process, the amplifying chip U2 is defined as corresponding to one end of the cable, and the amplifying chip U4 is defined as corresponding to the other end of the cable, both of which have the same function but opposite output ends, so as to ensure that no matter which end the video signal is input from, there is an independent amplifying chip to gain amplify the signal and output from the other end of the cable, thereby realizing bidirectional transmission.

[0043] Compared with the prior art, the embodiment of the application has the following beneficial effects:

[0044] In addition to the level conversion and voltage stabilization of the received video signal, the amplifying chip corresponding to the output port is selected according to the input port of the video signal, so as to gain amplify and output the video signal, thereby realizing bidirectional transmission amplification of the cable, without distinguishing the output end and the input end, and achieving plug and play, which greatly improves the convenience of construction and reduces the rework rate.

Claims

1. An HDMI signal bidirectional transmission amplification circuit, characterized in that, The application relates to a video signal transmission device, which comprises a main control unit, a level conversion unit, a voltage stabilization unit and a transmission amplification unit. The main control unit is electrically connected with the level conversion unit, so as to build a communication connection and convert the level format of a video signal. The voltage stabilization unit regulates the voltage parameter of the video signal. The main control unit is also electrically connected with the transmission amplification unit, so as to control the transmission amplification unit to output the video signal from a selected port. The main control unit builds a handshake channel for a signal source device and a signal receiving device.

2. The HDMI signal bidirectional transmission amplifier circuit according to claim 1, wherein, The main control unit adopts a transistor T1 and a transistor T2, wherein the gate of the transistor T1 is connected with the drain of the transistor T2. The level conversion unit adopts a conversion chip U3, wherein the 5th pin of the conversion chip U3 is used to output the serial data after level conversion, and the 6th pin of the conversion chip U3 is used to output the clock data after level conversion.

3. The HDMI signal bidirectional transmission amplifier circuit according to claim 2, wherein, The voltage stabilization unit adopts a voltage stabilization chip U1, wherein the 1st pin of the voltage stabilization chip U1 is connected with a primary power supply through a resistor FB5, and the 3rd pin of the voltage stabilization chip U1 is connected with a secondary power supply through a resistor FB4, so as to regulate the voltage parameter of the video signal. The transmission amplification unit comprises an amplification chip U2 and an amplification chip U4.

4. The HDMI signal bidirectional transmission amplifier circuit according to claim 1, wherein, The amplification chip U2 and the amplification chip U4 are used to amplify the gain of the video signal. The amplification chip U2 is used to output the video signal after gain amplification to one end of a cable.

5. The bidirectional HDMI signal transmission and amplification circuit according to claim 1, wherein, The amplification chip U4 is used to output the video signal after gain amplification to the other end of the cable. The main control unit selects the amplification chip U2 or the amplification chip U4 corresponding to the output port according to the input port of the video signal, so as to amplify the gain of the video signal and output the video signal.

6. The bidirectional HDMI signal transmission and amplification circuit according to claim 1, wherein, ​ ​ ​ 7. The bidirectional HDMI signal transmission and amplification circuit according to claim 6, wherein, ​ ​ ​ 8. The HDMI signal bidirectional transmission amplifier circuit according to claim 7, wherein, ​ ​

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