在雷达站、脉冲多路通信装置及其他精密的时间测量设备(例如相位计、数字式电压表等)中,往往要获得一个相对触发信号有一个可变延迟的脉冲.获得可变延迟脉冲的方法很多,最常见的要算是采用电压比较法.其作用原理可由图1(a)、(b)来加以说明:利用外加的触发脉冲u_1(t)触发脉冲展宽器而获得方波u_2(t),该方波的宽度由要求的延迟范围决定.电压 In radar stations, pulse multiplexers, and other sophisticated time-measuring equipment (such as phase meters, digital voltmeters, etc.) it is often necessary to obtain a pulse with a variable delay relative to the trigger signal Many ways, the most common to be considered voltage comparison method. Its principle of action can be shown in Figure 1 (a), (b) to illustrate: the use of additional trigger pulse u_1 (t) trigger pulse stretcher and get square wave u_2 (t ), The width of the square wave is determined by the required delay range