Analysis of Wandering Spur Patterns in a Fractional-N Frequency Synthesizer with a MASH-Based Divider Controller
Abstract
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.
Publication Title
IEEE Transactions on Circuits and Systems I: Regular Papers
Recommended Citation
Mai, D., & Kennedy, M. (2020). Analysis of Wandering Spur Patterns in a Fractional-N Frequency Synthesizer with a MASH-Based Divider Controller. IEEE Transactions on Circuits and Systems I: Regular Papers, 67 (3), 729-742. https://doi.org/10.1109/TCSI.2019.2958781
