Class D amplifiers are used for their high efficiency, but they have some undesirable characteristics, one of these being the residual switching frequency ripple. This paper shows a method of switching frequency ripple reduction by means of ripple steering. With this technique a second output is constructed, into which the switching ripple is steered, substantially relieving the main output from a major artifact of Class D operation.

Author: Mendenhall, Eric
Affiliation: Audio Power Electronics, Dove Canyon, CA
AES Convention: 117 (October 2004) Paper Number: 6300
Publication Date: October 1, 2004
Subject: Signal Processing

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