Hardware and software noise shapers are each used in conjunction with a hardware pulse width modulator to demonstrate the conversion of digital audio data directly to an analogue signal. Spectral results are used for comparison between the all hardware design, a computer simulation and a software noise shaper interfaced to a hardware pulse width modulator. Results suggest that the combination of oversampled noise shaping used in conjunction with pulse width modulation can provide a realizable topology for all digital power amplifiers.

Authors: Hiorns, R. E.; Bowman, R. G.; Goldberg, Jason M.; Sandler, Mark B.
Affiliation: King's College, University of London, London, UK
AES Convention: 90 (February 1991) Paper Number: 3034
Publication Date: February 1, 1991
Subject: Digital Audio Equipment and the Broadcasting Environment

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