低相噪宽带可调频频率合成器设计与实现

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1、ABSTRACToutputpowerof+10dBm,thephasenoisebetterthan-105dBc/Hz@20kHz,thefrequencyresolutionof1Hz,thefrequencymodulationrateofDC-100kHz,maximummodulationfrequencydeviationof5MHz.However,theabovespecificationsarerestrictedbytheVCOchoseninthisdissertation,thusthisresearchi

2、sjusttoverifytheimplementationfeasibilityofbroadbandFMprogram;ifforbetterspecifications,theprogramcanbesuccessfullyappliedtothespecificfrequencysynthesizerdesignaccordingtorelevantdemands.Keywords:frequencysynthesizer,lowphasenoise,fractional-Ndivider,sigma-deltamodula

3、tion,broadbandFMIII万方数据目录目录第一章绪论..............................................................................................................11.1研究背景及意义.................................................................................................11.2频率合成技术的发展概况....

4、.............................................................................21.3本文主要研究内容.............................................................................................5第二章低相噪宽带可调频频率合成器理论分析......................................................72.1小数分频锁相技术

5、基本理论.............................................................................72.1.1锁相环工作原理........................................................................................72.1.2锁相环的性质...........................................................................

6、.................82.1.3小数分频频率合成器基本原理................................................................92.1.4本文采用的小数分频杂散抑制方法.......................................................112.2锁相环噪声分析.................................................................................

7、..............182.2.1相位噪声的概念......................................................................................182.2.2锁相环环路噪声分析..............................................................................192.3宽带调频实现方式................................................

8、...........................................212.3.1调频基本原理.............................................................