视频处理电路设计

Design of CRT Video Processing Circuit

视频处理电路主要作用是把显示卡输出视频信号放大到足够的幅度和功率,使之满足一定的极性条件,提供显像管灯丝、栅极、加速极、聚焦极、高压阳极工作电压、驱动显像管、图像重现在显示屏。设计一种视频处理电路,通过介绍一种前置放大,CRT驱动的视频处理电路,系统包括前置放大电路、钳位脉冲形成、CRT驱动电路、白平衡调整等部分。

The object of the CRT video processing circuit is to amplify output video signal of video card to sufficient amplitude and power, meet to polarity condition on some degree, provid control voltage for the filament of picture tube grid, accelerating anode, focusing electrode and high voltage anode to drive the picture tube to display the picture on the screen. This paper describes a CRT video circuit with pre-amp and driver control. This system includes pre-amp circuit, clamp pulse production, blank level adjustment etc.