摘要
本文简要推导了在数字锁相环中广泛使用的集成鉴频-鉴相器的鉴相特性与鉴频特性,并对鉴频特性采用线性近似方法,用来分析、计算使用这种鉴相器的锁相环的捕捉性能。
The characteristics of a phase and a frequency detectors of an integrated frequency-phase detector,which is widely used in a digital phase-locked loop (PLL), are presented in this paper. The pull-in performance of PLL is also analysed and calculated with a linear approximate method from the frequency detector characteristics.
关键词
锁相环
集成鉴频
鉴相器
捕捉性能
phase-locked techniques, frequency discrinators, phase detectors, pulse duration ratio, pull-in performance
