A compact audio amplifier with high power and low distortion has been developed. The supply voltage for the class-B output stage of the amplifier is varied with the input signal so that the voltage applied to the active output transistor is held small and constant, appreciably reducing transistor dissipation. Total power dissipation is reduced to one-half that of the conventional class-B amplifier, the size of the heat sink to one-fifth, and overall weight to one-quarter. The amplifier is efficient, shows a distortion of 0.01% at 20-kHz maximum output, and a signal-to-noise ratio of 110 dB (IHF-A network).

Authors: Nakagaki, Harushige; Amada, Nobutaka; Inoue, Shigeki
Affiliation: Hitachi, Ltd., Consumer Products Research Center, Yokohama, Japan
JAES Volume 31 Issue 6 pp. 430-436; June 1983
Publication Date: June 1, 1983 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=4571

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location: (CD aes4)   /jrnl7888/1983/7923.pdf

Start a discussion about this paper!