The Multi-stAge noise SHaping Digital Delta-Sigma Modulator (MASH DDSM), which is commonly used as a divider controller in a fractional- $N$ frequency synthesizer, can produce a time-varying periodic pattern of tones in the output spectrum of the synthesizer; these are known as wandering spurs. In this work, a detailed analysis of the cause of wandering spur patterns in a MASH 1-1-1 DDSM-based fractional- $N$ frequency synthesizer, supported by experimental measurements, is presented.

中文翻译：

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带有基于 MASH 的分频器控制器的 N 分频频率合成器中的漂移杂散模式分析

多级噪声整形数字 Delta-Sigma 调制器 (MASH DDSM)，它通常用作分数- $N$ 频率合成器，可以在合成器的输出频谱中产生时变周期模式的音调；这些被称为流浪马刺。在这项工作中，详细分析了基于 MASH 1-1-1 DDSM 的分数- $N$ 提出了由实验测量支持的频率合成器。