This paper gives the design and experimental results of low noise NPLL frequency synthesizer and concludes that the passive loop filter is more suitable for low noise design than active loop filter.

介绍低相噪NPLL频率综合器的设计及实验结果。提出用无源环路滤波器比用有源环路滤波器更好，可获得低相噪设计。

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This paper gives the design and experimental results of low noise NPLL frequency synthesizer and concludes that the passive loop filter is more suitable for low noise design than active loop filter.

介绍低相噪NPLL频率综合器的设计及实验结果。提出用无源环路滤波器比用有源环路滤波器更好，可获得低相噪设计。

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