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使用双稳态触发器的简易鉴相器,其输出往往是模糊的,亦即触发器的初始状态、输入信号相对于基准信号的相位通常是不确定的。本文介绍一种使用两个JK触发器和三个双输入端“或非”门电路构成的鉴相器,可在0°～360°范围内提供不模糊的线性输出。该电路一个输入端的相位(可超前或滞后于另一个输入端)保持与双稳态触发器的状态无关,无论信号是否连续加到鉴相器。在多卜勒测距实验中,曾要求设计一个具有这种特性的鉴相
A simple phase detector using a bistable flip-flop often has an output that is blurry, that is, the initial state of the flip-flop. The phase of the input signal relative to the reference signal is usually undefined. This article describes a phase detector that uses two JK flip-flops and three dual-input NOR gates to provide an unambiguous linear output from 0 ° to 360 °. The phase of one input of the circuit (leading or lagging the other) remains independent of the state of the flip-flop, regardless of whether the signal is continuously applied to the phase detector. In Doppler ranging experiments, it has been demanded to design a phase detector with this characteristic