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具有压控频率输入端和晶控频率输入端(作标准频率),并且以脉冲方式输入,对两个输入端的脉冲相位进行鉴别,再以脉冲的形式输出,这样就组成了脉冲鉴相器.脉冲鉴相器是以晶控频率作为基准,对锁相环路中的压控频率随时进行鉴相,其相位差以负向脉冲形式输出,低电平的宽度表示两个输入端信号的相位差,至于相位差属于超前或者滞后,由两个输出端分别对
It has a voltage control frequency input and crystal frequency control input (for standard frequency), and the pulse input, the two input pulse phase identification, and then output in the form of pulses, thus forming a pulse phase detector. Pulse phase detector is based on the crystal-controlled frequency as a benchmark for phase-locked loop voltage control frequency at any time for phase identification, the phase difference in the form of negative pulse output, the width of the low level that the two input signal phase Poor, as the phase difference is advanced or lagging, respectively, by the two output pairs