MC4044鉴相器是数字锁相环路中得到广泛应用的一种脉冲鉴相器。它由三部分组成:1.对两路以脉冲形式输入的信号进行相位比较,即比相部分。以晶体振荡频率为基准频率,对压控振荡频率进行比相,两路信号的相位差决定比相部分输出脉冲的宽度。2.泵源部分:实质上泵源部分是一个电流源,其输出电流的有或无及时间长或短是由比相部分的 The MC4044 phase detector is a pulse phase detector widely used in digital phase-locked loops. It is made up of three parts: 1. Compare the two phases of the signal input in the form of pulses, that is, the phase ratio. Taking the crystal oscillation frequency as the reference frequency, the voltage-controlled oscillation frequency is compared with the phase. The phase difference between the two signals determines the width of the phase pulse output. 2. Pump part: In essence, the pump part is a current source whose output current is either long or short