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Dithered multi-bit sigma-delta modulator based DPWM for DC-DC converters

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dc.contributor.author Mooney, James
dc.contributor.author Halton, Mark
dc.contributor.author Iordanov, Petar
dc.contributor.author O'Brien, Vincent
dc.date.accessioned 2017-10-18T12:00:17Z
dc.date.available 2017-10-18T12:00:17Z
dc.date.issued 2015
dc.identifier.uri http://hdl.handle.net/10344/6173
dc.description peer-reviewed en_US
dc.description.abstract                            Multi-bit sigma-delta based digital pulse width modulators (DPWM) are used in the control of DC-DC converters in order to achieve high resolution and therefore high output voltage accuracy at switching frequencies up to multiple MHz. The standard sigma-delta modulators which have mainly been used in these DPWMs to date generate idle tones in the applied duty cycle which result in large oscillations in the output voltage. A dithered sigma-delta modulator is instead implemented here which eliminates these oscillations in the output voltage by adding a random signal before the quantizer in the sigma-delta modulator. The power spectral density of the duty cycle produced by the dithered sigma-delta modulator based DPWM shows a reduction in the undesirable idle tones and this is also verified experimentally using a buck converter prototype. en_US
dc.language.iso eng en_US
dc.publisher IEEE Computer Society en_US
dc.relation.ispartof IEEE Applied Power Electronics Conference, (APEC) en
dc.relation.ispartofseries Applied Power Electronics Conference and Exposition (APEC);pp. 2835-2839
dc.relation.uri http://dx.doi.org/10.1109/APEC.2015.7104752
dc.rights © 2015 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. en_US
dc.subject sigma-delta digital pulse width modulator en_US
dc.subject idle tones en_US
dc.subject DC-DC converters en_US
dc.subject digital control en_US
dc.title Dithered multi-bit sigma-delta modulator based DPWM for DC-DC converters en_US
dc.type info:eu-repo/semantics/conferenceObject en_US
dc.type.supercollection all_ul_research en_US
dc.type.supercollection ul_published_reviewed en_US
dc.date.updated 2017-10-18T11:37:22Z
dc.description.version ACCEPTED
dc.identifier.doi 10.1109/APEC.2015.7104752
dc.rights.accessrights info:eu-repo/semantics/openAccess en_US
dc.internal.rssid 1584983
dc.internal.copyrightchecked Yes
dc.description.status peer-reviewed


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