数控锁相频率合成器设计与试验

针对北京ＴＴＣ＆Ｍ站地面编码遥测基带设备的性能指标要求，设计了一种高性能数控连续可调频率合成器，应用于航天测控系统中。重点介绍了利用锁相环技术提高输出频率的分辨率和稳定度的方法；详细论述了吞脉冲程序分频的思想及其电路构成；对锁相环路各主要组成部分的设计过程也作了说明。

DESIGN AND IMPLEMENTATION OF DIGITIZED PLL SYNTHESIZED SIGNAL GENERATOR

To satisfy the PCM telemetry baseband equipment performance requirements of the ground system of Beijing TTC&M earth station, a new design technique of digitized synthesizer whose output frequency can be changed continuously(resolution:1Hz)is proposed in this paper.The mathod of improving the output signal frequency resolution and stability using PLL technique are mainly described.The idea of"swallow pulse" progranlable dividing frequency and its circuit composition are discussed in detail.The design diagram of PLL is also provided.