首页>
外国专利>
FRACTIONAL FREQUENCY SYNTHESIZER AND PHASE LOCKED LOOP UTILIZING FRACTIONAL FREQUENCY SYNTHESIZER AND METHOD THEREOF
FRACTIONAL FREQUENCY SYNTHESIZER AND PHASE LOCKED LOOP UTILIZING FRACTIONAL FREQUENCY SYNTHESIZER AND METHOD THEREOF
展开▼
机译:分数频率合成器和锁相环利用分数频率合成器及其方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
A fractional frequency synthesizer, applied to a phase-locked loop, includes a phase detector, a loop filter, a controllable oscillator, a first frequency divider, and a sigma-delta modulator (SDM). The phase detector generates a phase difference signal according to a reference signal and a feedback signal. The loop filter filters the phase difference signal to generate a filtered signal. The controllable oscillator generates the frequency signal according to the filtered signal. The first frequency divider generates the feedback signal by dividing a frequency of the frequency signal according to a dividing factor. The SDM determines the dividing factor according to a control signal.
展开▼