基于FPGA的小数频率合成器

Fractional Frequency Synthesizer with FPGA

文章介绍了采用ΣΔ调制技术的小数频率合成器。为了提高分频信号的质量和减少小数分频器的小数杂散,采用了三阶单环ΣΔ调制技术。本文还提出了采用这种原理的具体电路实现方式。

This paper introduces digital fractional divider with sigma-delta modulator. Sigle-stage with multiple feedforward is applied to fractional synthesis to achieve fine frequency resolution and eliminate the fractional spur. At last,the implement of circuit is given.