一种先进的N分数锁相环频率合成器

An Advanced Fractional-N PLL Frequency Synthesizer

分析了 N分数 PL L频率合成器 ,并把Σ-Δ调制技术应用于频率合成器中 ,解决了频率分辨率和鉴相器工作频率之间的矛盾 ,同时大大提高了噪声性能。

The paper analyzes the fractional-N PLL frequency synthesizer and applies the Σ-Δ modulation technology to it. This method allows the spectrum of error energy to be shaped, so that error energy is pushed away from the carrier.