According to transfer functions of the loop filter and the single phase locked loop system, it figures out the loop filters parameters, and introduces the selection of loop bandwidth.

根据环路滤波器传递函数以及单环锁相系统的传递函数，计算出环路滤波器的各个参数，并介绍了环路带宽的选择。

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This article presents a new design structure of variable bandwidth phase-locked loop based on improving phase-locked loop of actively mode-locked fiber laser.

对主动锁模光纤激光器的锁相环进行改进，提出一种新型的“变带宽锁相环”的设计结构。

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The digital very narrow-bandwidth Phase-Locked Loop(PLL) is designed and realized for the digital range and velocity measurement receiver.

本文正是为数字化测速测距接收机设计并实现全数字化超窄带锁相环。

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