频率合成器环路中的相位噪声及其消除方法

对频率合成器的要求是体积小、稳定性和可靠性强。体积小则要求提高相应的电源频率,这就必须提高频率产生环节的时钟电路的稳定性。文中阐述了频率合成器的组成及工作原理,通过分析相位噪声及环路噪声出现的原因,给出了如何消除噪声的方法。

The Existence of Phase Noise in Frequency Synthesizer Circles and the Way of Eliminate Noise

With the development of electronic technology,people put much higher requirements to the use of frequency synthesizer,esp.to small size,high stability and reliability.First of all,the small size requires that the relevant power supply frequency should be raised,which makes the stability of the clock circuit in the link of producing frequency to be of vital importance.This article explains the composition and work principle of frequency synthesizer,analyzes the causes making the phase noise and circle noise appear in frequency synthesizer and gives the method of how to eliminate them.