本变换器是对输入信号电压进行峰值取样的一个高速模-数(A/D)变换器。视频输入信号送到一个多路比较器上,比较器又和一等阻值的梯形电阻网络相连接。比较器的输出端接到一多路“R—S”触发器上。而时间实际上又划分成由时钟周期决定的取样间隔。在每一取样间隔里,触发器的输出表示视频输入信号的最高电平。触发器的输出又接到一对多路前置译码器和一多路转换器上,以数字形式记录视频信号在梯形电阻网络上所达到的电平最高点。这样就将高频视频信号变换成数字信号,简称具有峰值采样的A/D变换器。 The converter is a high-speed analog-to-digital (A / D) converter that samples the peak value of the input signal voltage. The video input signal is sent to a multiplexer, which in turn is connected to a first-order resistor ladder resistor network. The output of the comparator is connected to a multi-way “R-S” flip-flop. The time is actually divided into sampling intervals determined by the clock cycle. In each sampling interval, the output of the flip-flop indicates the highest level of the video input signal. The output of the flip-flop is in turn coupled to a pair of multi-way predecoders and a multiplexer to digitally record the highest level of video signals reached on the ladder resistor network. This will be high-frequency video signals into digital signals, referred to as peak sampling A / D converter.