6—1 概述在第一章中曾介绍了三管式彩色摄像机的电路结构方框图。由图可见,从摄像管取出的信号电流,在进入编码器以前,必须经过一系列的放大、补偿等处理,该部分电路,统称视频处理电路。过去,除预放器在摄像机机头以 6-1 Overview In the first chapter, the circuit structure of the three-tube color camera has been introduced. As can be seen from the figure, the signal current drawn from the camera tube, before entering the encoder, must go through a series of amplification, compensation and other processing, the part of the circuit, collectively referred to as video processing circuit. In the past, except pre-amp camera head