The video amplifier is an amplified video signal that enhances the brightness, chrominance, and sync of the video. When the video transmission distance is relatively long, it is better to use a video line with a thicker line diameter, and at the same time, a video amplifier can be added in the line to enhance the signal strength to achieve long-distance transmission.
The video amplifier can enhance the brightness, chrominance and sync signal of the video, but the inter-line interference signal will also be amplified. In addition, too many video amplifiers cannot be connected in series in the loop, otherwise saturation will occur and the image will be distorted. The following is a circuit diagram of a video amplifier consisting of discrete components. 
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