微分控制锁相环鉴频器的根轨迹分析

The Root Locus Analysis of Differential Controlled Phase Locked Loop Discriminator

本文对三阶及四阶微分控制锁相环鉴频器的根轨迹进行了分析,借助于计算机辅助分析及理论研究,确定了在不同时常数条件下引起四阶环根轨迹跳变的参数边界值,这对于研究和设计这种低门限锁相环鉴频器瞬态响应的时域指标,将提供有用的依据。

In this paper, the root locus of third and fourth order differential controlled phase locked loop discriminator are analyzed. By means of computer aided analysis and theoretical research, under different time constant conditions, the boundary value of parameter to cause abrupt change of root locus of fourth order phase locked loop is determined. It provides a useful basis for the study and design of the time performance of transient response of such a phase locked loop discriminator with lower threshold.