This paper describes a high-efficient, pulse-density modulation (PDM) audio power amplifier. In comparison with the conventional Class-B amplifier which has the same maximum output power, the PDM amplifier is ultra-compact (20%) in size, is 2.3 times as efficient, has a high audio performance, has the same THD and signal-to-noise ratio, and shows low-spurious radiation.

Authors: Iwata, Kazuya; Hatanaka, Masahiko; Fujii, Katsuyoshi; Kageyama, Satoshi
Affiliation: Matsushita Electric Industrial Co., Ltd., Kadoma, Osaka, Japan
AES Convention: 101 (November 1996) Paper Number: 4328
Publication Date: November 1, 1996
Subject: Analog Electronics

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