Investigation of crosstalk in self oscillating switch mode audio power amplifier

Thomas Haagen Birch, Rasmus Overgaard Ploug, Niels Elkjær Iversen, Arnold Knott

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Abstract

Self oscillating switch mode power ampliers are known to be susceptible to interchannel disturbances also known as crosstalk. This phenomenon has a signicant impact on the performance of an amplier of this type. The goal of this paper is to investigate the presence and origins of crosstalk in a two channel self oscillating switch mode power amplier (class D). A step by step reduction of elements in an
amplier built for this task, is used for methodically determining the actual presence and origins of crosstalk. The investigation shows that the crosstalk is caused by couplings in the self oscillating pulse width modulation circuits, but also that the output lter has a major impact on the level of crosstalk.
Original languageEnglish
Title of host publicationProceedings of the 132nd AES Convention
Number of pages8
PublisherAudio Engineering Society
Publication date2012
Publication statusPublished - 2012
EventAES 132nd Convention - Budapest Congress & World Trade Center, Budapest, Hungary
Duration: 26 Apr 201229 Apr 2012
http://www.aes.org/

Conference

ConferenceAES 132nd Convention
LocationBudapest Congress & World Trade Center
CountryHungary
CityBudapest
Period26/04/201229/04/2012
Internet address

Cite this

Birch, T. H., Ploug, R. O., Iversen, N. E., & Knott, A. (2012). Investigation of crosstalk in self oscillating switch mode audio power amplifier. In Proceedings of the 132nd AES Convention Audio Engineering Society.