基于ADF4106的锁相环设计  

Design of phase locked loop which is based on ADF4106

作　　者：丁新强[1] 秦开宇[1] 韩尧[1] 

机构地区：[1]电子科技大学空天科学技术研究院,成都611731

出　　处：《电子测试》2011年第6期16-18,共3页Electronic Test

摘　　要：信号源作为一种通用测试仪器,是研制、检测与维护众多电子产品的必备工具,而频率合成是信号源的核心组成部分,对信号源整机的功能和指标起着决定性作用,锁相环频率合成可以产生高质量的频率,本设计利用锁相环基本原理,设计出了高性能的频率合成电路。本文详细介绍了某信号源二本振频率3.6GHz的锁相环设计,给出了系统原理图以及关键电路的设计,并通过仿真和调试,产生了高精度、低相噪以及杂散好的3.6GHz频率信号,频谱在中心频率频偏20KHz处相噪达到-107dB/Hz,满足了系统要求。As a general testing instrument,signal generator is an essential instrument in developing,detecting and maintaining many electronic products.Frequency synthesis is the core of the signal generator,it determined the function and index of the signal generator,phase locked loop synthesis can generate high quality frequency,this design used the basic theory of phase locked loop,designed a high quality frequency synthesis circuit.This paper introduced the design of the second LO in a signal generator,supplied the system function block diagram and the design of the crucial circuit,and through simulation and debugging,we finally generated a 3.6GHz frequency signal with high precision,low spurs and good phase noise,the phase noise is up to-107dB/Hz offset the center frequency 20KHz,satisfied the demand of the system.

关 键 词：频率合成 锁相环 相位噪声 

分 类 号：TN911.8[电子电信—通信与信息系统]