This paper describes a digital input Class D amplifier controller integrated circuit which performs many of the functions needed to build a high performance Class D audio amplifier. Sophisticated digital Pulse Width Modulation, combined with digital feed-forward and feedback paths, yields both low cost and high performance amplifier designs. A powerful DSP is included to support amplifier control and allows comprehensive audio signal processing, including loudspeaker load compensation, EQ, time alignment, room acoustics compensation, bass enhancement, loudspeaker driver protection, virtual surround and other audio signal processing tasks. Power supply feed-forward and closed-loop feedback technology correct for power supply variations, non-linearity and other distortion-inducing mechanisms.

Authors: Andersen, Jack; Chieng, Daniel; Harris, Steven; Klaas, Jeff; Kost, Michael; Taylor, Skip
Affiliation: D2Audio
AES Convention: 120 (May 2006) Paper Number: 6692
Publication Date: May 1, 2006 Import into BibTeX
Session Subject: Signal Processing; High Resolution Audio
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=13496

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