摘要
锁相式频率合成器采用取样式或开关式鉴相器，会有重复频率的脉冲漏泄，导致寄生边频的产生，频率合成器频谱纯度下降，本方法是将环路滤波器（ＬＦ）加以改进，并在文中进行讨论，实验证明，该措施对提高边频抑制能力，改善频谱纯度十分有效。
The sample type or switch type of the phase:ensitive detector is used inthe phase locked loop frequency synthesizer.The phase sensitive detector causes the pulseleakage of repeated frequency which leads to parasitic side frequency.And then the outputspectral purity decreases in the frequency synthesizer. The present method deals with the im-provement of the loop filter(L,F.),and has been proved by the experiments to be quite ef-fective on improving side frequency suppression and spectral purity.
出处
《厦门大学学报（自然科学版）》
CAS
CSCD
北大核心
1994年第6期785-789,共5页
Journal of Xiamen University：Natural Science
关键词
锁相环
频率合成器
频谱纯度
Phase-locked loop,Loop filter,Frequency synthesizer,Side frequen-cy suppression,Spectral
