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Convention Paper

All-Digital Power Amplifier Based on Pulse-Width Modulation

Authors: Pedersen, M. S.; Shajaan, M.

AES Convention 96 · Paper 3809 · February 1994

Abstract

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.

Details

Published in
AES Convention 96
AES Convention
96
Paper number
3809
Publication date
February 6, 1994
Session subject
Implementation of Digital Audio Systems
Affiliation
Laboratory of Industrial Electronics, Technical University of Denmark, Lyngby, Denmark ; Electronics Institute, Technical University of Denmark, Lyngby, Denmark (See document for exact affiliation information.)
Type
Convention Paper