单片机程控锁相环及其在晶闸管触发控制中的应用

A Microcontroller-based Software Controlled Phase-locked-loop and Its Application

利用单片机内部定时器／计数器实现的程控锁相环，工作稳定可靠，当输入信号频率发生波动时能实现频率自动跟踪。阐述了程控领相环的基本原理和实现方法，给出了应用程控锁相环实现高精度晶闸管触发控制的设计实例。

A software controlled phase-locked-loop using timer/counter inside 8052 microcontroller can work stably and reliably, it can trace input frequency automatically. The principle of the software controlled PLL is described, an example of its application in SCR trigger circuit is give.