一种数字CCD相机输出信号长线传输方法

A Long-wire Transmission Approach of a Digital CCD Camera Signals

提出了一种现场实用的数字CCD相机输出信号长线传输系统的实现方法。利用低压差分信号(LVDS)的特点,将CCD输出的ChannelLink的标准信号转换为TTL电平,经FPGA滤波、缓冲之后再转换为LVDS进行相对较长距离的传输,避免了CCD相机输出信号直接较长距离传输过程中外界随机信号引起的干扰。

An approach of a CCD signal transmission through long-wire is presented. By using the characteristic of LVDS (low voltage differential signal), first, the channel link standard signal of CCD camera is transformed into TTL levels, the date of TTL levels filtered and buffered by FPGA(field programmable gate array) are transformed into LVDS, then LVDS are transmitted through long-wire. This method can meet the need of real-time transmission and avoid the interference of random signals.