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Convention Paper

THE AUTOBIAS AMPLIFIER: A New Topology for Automatically Biased Audio Amplifiers Using Power MOSFETs

Authors: Roehr, Bill

AES Convention 69 · Paper 1757 · May 1981

Abstract

An obstacle blocking wide acceptance of power MOSFETS in audio amplifiers is the lack of an automatic bias technique. A unique circuit topology senses and maintains quiescent current despite the half-wave pulses inherent in class AB operation. Performance of the circuit, consisting of little more than a differential amplifier driving a totem pole output, rivals that of more complex circuits.

Details

Published in
AES Convention 69
AES Convention
69
Paper number
1757
Publication date
May 6, 1981
Affiliation
Siliconix, Inc., Santa Clara, CA (See document for exact affiliation information.)
Type
Convention Paper