Wandering spurs in MASH 1-1 delta-sigma modulators

Loading...
Thumbnail Image
Files
Yann.pdf(9.42 MB)
Accepted Version
Date
2019-01-29
Authors
Donnelly, Yann
Kennedy, Michael Peter
Journal Title
Journal ISSN
Volume Title
Publisher
Institute of Electrical and Electronics Engineers (IEEE)
Research Projects
Organizational Units
Journal Issue
Abstract
Wandering spurs are a little-studied phenomenon seen in MASH and SQ-digital delta-sigma modulators. They take the form of frequency-modulated spurs which periodically appear in-band. Since modulators are often employed as divide ratio controllers in fractional-N phase lock loops, these spurs can feed into the output phase noise spectrum. In this paper, we explain the mechanism which creates the wandering spurs and offer a prediction for the behavior of these spurs in the MASH 1-1 modulator. Simulation results are presented which confirm our theoretical predictions.
Description
Keywords
Multi-stage noise shaping , Delta-sigma modulation , Phase locked loops , Frequency modulation , Phase modulation , Phase noise , Wandering spur , PLL , MASH , Experimental , Modulator , Delta-sigma , Spectrum , Spur , Phase lock loop , Frequency modulation.
Citation
Donnelly, Y. and Kennedy, M.P. (2019) 'Wandering spurs in MASH 1-1 delta-sigma modulators', IEEE Transactions on Circuits and Systems I: Regular Papers, pp. 1-14. doi:10.1109/TCSI.2019.2893435
Copyright
© 2019, IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.