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

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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.
Original languageEnglish
Title of host publication22nd Austrian Workshop on Microelectronics (Austrochip)
PublisherInstitute of Electrical and Electronics Engineers
ISBN (Electronic)978-1-4799-7244-9
ISBN (Print)978-1-4799-7243-2
Publication statusPublished - 2014
EventAustrian Workshop on Microelectronics (Austrochip): Austrochip 2014 - Graz, Austria
Duration: 9 Oct 20149 Oct 2014


WorkshopAustrian Workshop on Microelectronics (Austrochip)

Fields of Expertise

  • Information, Communication & Computing

Treatment code (Nähere Zuordnung)

  • Experimental
  • Basic - Fundamental (Grundlagenforschung)

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