The main loss of Class A is the integrated product of the quiescent current IQ and the collector-to-emitter voltage Vce. The efficiency can be increased by reducing either Vce or IQ. The paper proposes a high-efficiency Class-A amplifier developed by reducing Vce using a variable power supply. Simulation results of efficiency and distortion are 69% and 0.0024%, respectively.

Authors: Jeong, J. H.; Jung, N. S.; Cho, G. H.
Affiliation: Korea Advanced Institute of Science and Technology, Taejon, Korea
AES Convention: 100 (May 1996) Paper Number: 4257
Publication Date: May 1, 1996
Subject: Signal Processing

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