基于锁相环实现信号相频突变的跟踪  

Realization of signal phase-frequency mutation tracking based on phase-locked loop

作　　者：孙永磊[1] 杨昕欣[1] 

机构地区：[1]北京航空航天大学,北京100191

出　　处：《现代电子技术》2018年第1期51-56,共6页Modern Electronics Technique

基　　金：国家自然科学基金资助项目(61371077)~~

摘　　要：锁相环是一种相位误差自动控制系统,在通信领域有着广泛的应用。通过设计锁相环路,实现对输入信号的频率和相位突变时的跟踪。首先介绍锁相环路的基本原理,然后对一阶和二阶锁相环的动态跟踪特性进行分析,最后采用仿真软件Multisim 13.0设计仿真电路,针对一阶、二阶PLL的输入信号频率和相位突变时的情况进行仿真研究,实际仿真结果与理论分析相吻合。仿真结果表明,设计的锁相环路实现了对输入信号频率和相位突变后的跟踪。The phase-locked loop （PLL） is designed to realize signal tracking when the phase and frequency mutation of input signal occurs. The basic principle of the phase-locked loop is introduced in this paper. The dynamic tracking characteristics of the first-order and second-order PLLs are analyzed. The simulation software Multisim 13.0 is used to design the simulation circuit. The condition that the phase and frequency mutation of the input signal of the first-order and second-order PLLs occurs is simulated. The simulation result is identical with the theoretical analysis result. The simulation results show that the designed phase-locked loop can realize tracking when the input signal＇s frequency and phase mutation occurs.

关 键 词：锁相环 频率突变 相位突变 信号跟踪 理论分析 MULTISIM 

分 类 号：TN702-34[电子电信—电路与系统]