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Convention Paper

Progress Towards a Digital Power Amplifier

Authors: Sandler, Mark

AES Convention 80 · Paper 2361 · March 1986

Abstract

This paper reports advances made in the development of an all digital audio power amplifier or power digital-to-analogue converter. A previous paper (1) reported simulation and theoretical results and demonstrated that they were in agreement. A hardware test rig has been constructed for both one and two-sided digital (uniformly sampled) pulse width modulators and it is shown that the one sided modulator confirms the theory previously reported, but that the two sided modulator does not, though its performance in some cases exceeds that predicted. Since the original paper other work in the area has been reported (2) which claims that uniform and naturally sampled pulse width modulation are essentially the same and therefore that criteria developed for naturally sampled systems may be used to design uniformly sampled systems. To refute this assertion a two sided naturally sampled modulator has been constructed and the results so obtained are compared with those of the uniformly sampled system.

Details

Published in
AES Convention 80
AES Convention
80
Paper number
2361
Publication date
March 6, 1986
Session subject
Digital Audio Techniques
Affiliation
King's College London (KQC) (See document for exact affiliation information.)
Type
Convention Paper