Multi-Channel Video Signal Processing Hybrid Integrated Circuit
A technology of video signal processing and hybrid integrated circuit, which is applied in the electronic field, can solve the problems of static operating point and output video gain debugging complex, output video bias voltage low precision, etc., and achieve simple structure, high reliability and easy realization Effect
Active Publication Date: 2017-06-16
EAST CHINA INST OF OPTOELECTRONICS INTEGRATEDDEVICE
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Problems solved by technology
However, the circuit is mainly composed of transistors, and its static operating point and output video gain are complex to debug. At the same time, the clamp circuit composed of transistors makes the output video bias voltage accuracy of the circuit low.
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Embodiment 1
[0032] as image 3 For the typical four-channel video signal processing hybrid integrated circuit shown, the four-channel video signal processing hybrid integrated circuit includes four identical and independent channels, and the composition and working principle of each channel are the same, and the input video 10 Output sync signal 12, DC level 13 (H / L), output video 14 after channel 11, input video 20 output sync signal 22, DC level 23 (H / L), output video 24, input video 30 after channel 21 Output synchronous signal 32, DC level 33 (H / L), output video 34 after channel 31, input video 40 output synchronous signal 42, DC level 43 (H / L), output video 44 after channel 41.
[0033] The structural block diagram of channel 11 of a typical four-channel video signal processing hybrid integrated circuit is as follows Figure 4 As shown, the four-channel video signal processing hybrid integrated circuit includes a coupling circuit 111 , a sync separation circuit 112 , a trigger shapi...
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The invention discloses a multi-channel video signal processing hybrid integrated circuit, which includes a plurality of identical and independent channels, and a plurality of input videos are respectively input into one of the channels to output a synchronous signal, a DC level, and an output video; in each channel, The input video is input into the synchronous separation circuit and the video amplifying circuit respectively in the way of AC coupling through the coupling circuit. After the gain of the signal is adjusted, it is input to the video output circuit, and the output video is obtained after being coupled by the video output circuit. At the same time, the output video is input to the bias adjustment circuit, and the bias adjustment circuit adjusts the bias voltage of the output video to obtain the output gain and The output bias voltage meets the video signal required by the display terminal. The circuit of the invention is small in size, simple in structure, easy to implement, simple and flexible in debugging and high in reliability.
Description
technical field [0001] The invention relates to a video signal processing circuit, in particular to a video processing hybrid integrated circuit with small volume, simple structure, high precision of output gain and output bias voltage, simple debugging and multi-channel, belonging to the field of electronic technology. Background technique [0002] Such as figure 1 As shown, the existing video signal processing circuits used in video electronic equipment are mostly composed of coupling circuit, synchronization separation circuit, video amplification circuit, bias adjustment circuit and video output circuit. The input video signal is input synchronously after passing through the coupling circuit In the separation circuit, the synchronization signal in the video signal is separated and output. At the same time, the video amplification circuit and the bias adjustment circuit respectively amplify and adjust the amplitude and bias voltage of the input video signal, and the vide...
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IPC IPC(8): H04N5/14H04N5/08
Inventor 李建和谢年生鲁争艳于春香陈锋
Owner EAST CHINA INST OF OPTOELECTRONICS INTEGRATEDDEVICE