Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation

Bernd Deutschmann, Gunter Winkler, Timucin David Karaca

Publikation: Beitrag in Buch/Bericht/KonferenzbandBeitrag in einem KonferenzbandForschungBegutachtung

Abstract

Due to their high efficiency compared to conventional Class AB amplifiers, Class D audio amplifiers have increasingly become the amplifier of choice especially for low power applications such as portable electronics. However, Class D amplifiers are still a major source of electromagnetic emission of the electronic applications in which they are used. In this paper the benefits of using spread spectrum techniques in order to reduce the emission of Class D audio amplifiers is highlighted. Based on IC-level measurement results of a 10W Mono Class D speaker amplifier, that allows to be synchronized to an external clock, it is shown how spread spectrum parameters like deviation, modulation frequency and modulation signal can be optimized in order to maximize the reduction of the emission.
Originalspracheenglisch
Titel 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers
Seitenumfang6
ISBN (elektronisch)978-1-4673-7897-0
PublikationsstatusVeröffentlicht - Nov 2015
VeranstaltungInternational Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) - Edinburgh, Großbritannien / Vereinigtes Königreich
Dauer: 10 Nov 201513 Nov 2015

Konferenz

KonferenzInternational Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo)
LandGroßbritannien / Vereinigtes Königreich
OrtEdinburgh
Zeitraum10/11/1513/11/15

Schlagwörter

    Fields of Expertise

    • Information, Communication & Computing

    Treatment code (Nähere Zuordnung)

    • Experimental

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    Deutschmann, B., Winkler, G., & Karaca, T. D. (2015). Emission reduction in Class D audio amplifiers by optimizing spread spectrum modulation. in 2015 10th International Workshop on the Electromagnetic Compatibility of Integrated Circuits (EMC Compo) Institute of Electrical and Electronics Engineers.