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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.
Author (s): Roehr, Bill;
Affiliation:
Siliconix, Inc., Santa Clara, CA
(See document for exact affiliation information.)
AES Convention: 69
Paper Number:1757
Publication Date:
1981-05-06
DOI:
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Roehr, Bill; 1981; THE AUTOBIAS AMPLIFIER: A New Topology for Automatically Biased Audio Amplifiers Using Power MOSFETs [PDF]; Siliconix, Inc., Santa Clara, CA; Paper 1757; Available from: https://aes.org/publications/elibrary-page/?id=11996
Roehr, Bill; THE AUTOBIAS AMPLIFIER: A New Topology for Automatically Biased Audio Amplifiers Using Power MOSFETs [PDF]; Siliconix, Inc., Santa Clara, CA; Paper 1757; 1981 Available: https://aes.org/publications/elibrary-page/?id=11996
@inproceedings{Roehr1981the,
title={{THE AUTOBIAS AMPLIFIER: A New Topology for Automatically Biased Audio Amplifiers Using Power MOSFETs}},
author={Roehr, Bill},
year={1981},
month={may},
booktitle={Journal of the Audio Engineering Society},
publisher={Paper 1757; AES Convention 69; May 1981},
number={1757},
organization={AES},
}
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