A simple class-D audio power amplifier using a passive CT ΣΔ modulator for medium quality sound systems

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Abstract

This paper presents a clab-D power amplifier for medium quality sound systems using a second-order pabive sigma-delta modulator (ΣΔM). The ΣΔM controls an output power stage consisting of a H-bridge. The loop filter of the ΣΔM was designed using a optimization procedure based on genetic algorithm (GA), that takes into account several parameters. This system was implemented using discrete components and the experimental results show that a DR of 75 dB is achieved with a peak signal-to-noise-plus-distortion ratio (SNDR) of 54 dB.
Original languageEnglish
Title of host publicationProceedings of the 22nd International Conference Mixed Design of Integrated Circuits and Systems (MIXDES 2015)
EditorsA. Napieralski
Place of PublicationNew York
PublisherInstitute of Electrical and Electronics Engineers Inc.
Number of pages543
ISBN (Electronic)978-8-3635-7807-7
ISBN (Print)978-1-4799-8699-6
DOIs
Publication statusPublished - 2015
Event22nd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2015 - Torun, Poland
Duration: 25 Jun 201527 Jun 2015

Conference

Conference22nd International Conference Mixed Design of Integrated Circuits and Systems, MIXDES 2015
CountryPoland
CityTorun
Period25/06/1527/06/15

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Keywords

  • Audio
  • Clab-D
  • sigma-delta

Cite this

De Melo, J. L. A., Leitão, P. V., Goes, J. C. D. P., & Paulino, N. F. S. V. (2015). A simple class-D audio power amplifier using a passive CT ΣΔ modulator for medium quality sound systems. In A. Napieralski (Ed.), Proceedings of the 22nd International Conference Mixed Design of Integrated Circuits and Systems (MIXDES 2015) [7208582] New York: Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MIXDES.2015.7208582