Simulation and experimental investigation of a nonlinear mechanism for spur generation in a fractional-N frequency synthesizerShow others and affiliations
2012 (English)Conference paper, Published paper (Refereed)
Abstract [en]
The performance of fractional-N frequency synthesizers in wireless communications applications is degraded by the presence of spurious tones. While the Digital Delta-Sigma Modulator (DDSM) can be directly responsible for the production of such tones, a range of deterministic and stochastic techniques have been invented to eliminate the principal causes associated with the architecture of the DDSM. A second source of spurs, when the spectrum of the DDSM iteself is spur-free, is (analogue) nonlinearities in the synthesizer. Recent work has predicted that specific nonlinearities will produce tones at well-defined frequencies; this paper presents simulation and experimental verification of the prediction.
Place, publisher, year, edition, pages
2012.
Keywords [en]
Spur, Sigma-Delta Modulator, Dither, CppSim
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:liu:diva-154944DOI: 10.1049/ic.2012.0179ISBN: 978-1-84919-613-0 (electronic)OAI: oai:DiVA.org:liu-154944DiVA, id: diva2:1294230
Conference
IET Irish Signals and Systems Conference (ISSC 2012)
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