Wandering Spurs in MASH 1-1 Delta-Sigma Modulators

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Title: Wandering Spurs in MASH 1-1 Delta-Sigma Modulators
Authors: Donnelly, Yann
Kennedy, Michael Peter
Permanent link: http://hdl.handle.net/10197/10697
Date: 29-Jan-2019
Online since: 2019-05-29T09:11:36Z
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.
Funding Details: Enterprise Ireland
Irish Research Council
Science Foundation Ireland
Type of material: Journal Article
Publisher: IEEE
Journal: IEEE Transactions on Circuits and Systems I: Regular Papers
Start page: 1
End page: 14
Copyright (published version): 2019 IEEE
Keywords: Wandering spurPLLMASHExperimentalModulatorDelta-sigmaSpectrumSpurPhase lock loopFrequency modulation
DOI: 10.1109/tcsi.2019.2893435
Language: en
Status of Item: Peer reviewed
Appears in Collections:Electrical and Electronic Engineering Research Collection

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