用途广泛的锁相环曾庆贵镇相环（英文缩写为ＰＬＩ。）是一种实现相位自动镇定的控制系统。最初，销相环由分立电子元器件组成。由于集成电路技术的飞速发展，各种锁相环集成电路也相继出现。集成锁相环一般只需外接少量电阻器和电容器就能正常工作，使用极为方便。在ＣＭ... Uses a wide range of phase-locked loop Zeng Qinggui phase-phase loop (English abbreviation PLI.) Is a phase automatic stabilization of the control system. Initially, the phase-locked loop consists of discrete electronic components. Due to the rapid development of integrated circuit technology, a variety of phase-locked loop integrated circuits have also emerged one after another. Integrated phase-locked loop generally only need a small amount of external resistors and capacitors can work properly, the use of extremely convenient. In CM ...