An all-digital power amplifier capable of driving a loudspeaker at high-power levels is analyzed and implemented. The amplifier is based on linearized pulse-width modulation (LPWM). The LPWM amplifier has an efficiency of >90% at eight-times oversampling. It is shown that the distortion generated by the output stage limits the system performance. The LPWM amplifier is compared with a Sigma-Delta modulator based amplifier.

Authors: Pedersen, M. S.; Shajaan, M.
Affiliations: Laboratory of Industrial Electronics, Technical University of Denmark, Lyngby, Denmark ; Electronics Institute, Technical University of Denmark, Lyngby, Denmark(See document for exact affiliation information.)
AES Convention: 96 (February 1994) Paper Number: 3809
Publication Date: February 1, 1994 Import into BibTeX
Subject: Implementation of Digital Audio Systems
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=6423

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