Low frequency dithering technique for linearization of voltage mode class-D amplifiers

F.A. Malekzadeh, R. Mahmoudi, A.H.M. Roermund, van

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

Abstract

This paper introduces a novel technique for simultaneous linearity and efficiency enhancement of class-D amplifiers by combining a low frequency sinusoid, known as dither, with a bandpass signal. The proposed technique improves the linearity due to dither averaging effect, and power efficiency, due to the reduction of reactive loss. The feasibility of the idea is verified through realization and measurement of a 65 nm TSMC CMOS voltage mode class-D amplifier operating at 1 GHz. The drain efficiency is enhanced from 19.2 to 37 percent, while providing ACPR of - 33 dBc for the first adjacent WCDMA channel.
Original languageEnglish
Title of host publicationProceedings of the IEEE topical conference on power amplifiers for wireless and radio applications (PAWR 2013) : 16-19 January 2013, Austin, Texas
Place of PublicationPiscataway
PublisherInstitute of Electrical and Electronics Engineers
Pages55-57
ISBN (Print)978-1-4673-2931-6
DOIs
Publication statusPublished - 2013
Eventconference; IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications 2013 (PAWR 2013); 2013-01-16; 2013-01-19 -
Duration: 16 Jan 201319 Jan 2013

Conference

Conferenceconference; IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications 2013 (PAWR 2013); 2013-01-16; 2013-01-19
Period16/01/1319/01/13
OtherIEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications 2013 (PAWR 2013)

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    Malekzadeh, F. A., Mahmoudi, R., & Roermund, van, A. H. M. (2013). Low frequency dithering technique for linearization of voltage mode class-D amplifiers. In Proceedings of the IEEE topical conference on power amplifiers for wireless and radio applications (PAWR 2013) : 16-19 January 2013, Austin, Texas (pp. 55-57). Institute of Electrical and Electronics Engineers. https://doi.org/10.1109/PAWR.2013.6490187