锁相环频率合成器相位噪声改善方法研究

介绍单环锁相环频率合成器的结构,详细分析了锁相环相位噪声特性,提出了锁相环相位噪声的改善措施,并由此引出了对目前比较常用且能有效降低相位噪声的锁相频率合成器结构的分析与研究。阐述了这些频率合成器的结构,比较了它们的优缺点。为工程应用提供了一些有价值的参考。

Method to Improve the Phase Noise of Frequency Synthesizer Based on PLL

The structure of the phase-locked loop frequency synthesizer is introduced,the characteristics of the PLL phase noise are analyzed in detail and corresponding reduction methods are introduced,and the existing typical frequency synthesis techniques which are more commonly used and can effectively reduce the phase noise of phase-locked frequency synthesizers is studied.The structure of these frequency synthesizer are introduced,the advantages and disadvantages of the techniques are compared.It provides some valuable reference for practical engineering application.