Impact of Spread Spectrum EMI-Reduction on Audio Performance of Filterless Class-D Amplifiers

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Abstract

In this paper the ability of using spread spectrum clock generation (SSCG) techniques for audio applications is investigated. It is shown how this technique can be used to reduce the electromagnetic emission that is caused by the high frequency switching activity of Class-D audio amplifiers. Additionally the trade-offs when using this technique are explained. Based on measurement and simulation of the conducted common-mode electromagnetic emission and THD+N of a class D audio amplifier, it is shown how the spread spectrum technique can be used to reduce the electromagnetic emission in certain frequency ranges and how it impacts the audio performance.
Originalspracheenglisch
Titel22nd Austrian Workshop on Microelectronics (Austrochip)
Herausgeber (Verlag)Institute of Electrical and Electronics Engineers
Seiten47-52
ISBN (elektronisch)978-1-4799-7244-9
ISBN (Print)978-1-4799-7243-2
PublikationsstatusVeröffentlicht - 2014
Veranstaltung22nd Austrian Workshop on Microelectronics: Austrochip 2014 - Graz, Österreich
Dauer: 9 Okt 20149 Okt 2014

Workshop

Workshop22nd Austrian Workshop on Microelectronics
LandÖsterreich
OrtGraz
Zeitraum9/10/149/10/14

Fields of Expertise

  • Information, Communication & Computing

Treatment code (Nähere Zuordnung)

  • Experimental
  • Basic - Fundamental (Grundlagenforschung)

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