The concepts and design aspects of all-digital open-loop audio power amplifiers, based on multi-level power converters, are presented. Innovative modulation techniques to reduce harmonic distortion of this type of amplifiers are also presented. A prototype of a digital multi-level audio power amplifier has been developed, implemented and tested. THD plus noise performance comparisons between some class A, AB and D amplifiers are presented. Results show that the proposed digital audio power amplifier can be a promising solution for high quality digital audio power amplifier.

Authors: Antunes, Victor; Fernando Silva, Jose; Fernão Pires, Vitor
Affiliations: ESTSetubal / IPS; Instituto Superior Tecnico(See document for exact affiliation information.)
AES Conference: 27th International Conference: Efficient Audio Power Amplification (September 2005)
Paper Number: 2-2
Publication Date: September 1, 2005 Import into BibTeX
Subject: Efficient Audio Power Amplification
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=13262

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