A high power Class A amplifier dissipates a lot of power in spite of high fidelity. A Class D switching power amplifier has high efficiency and poor dynamics by low bandwidth. The previous paper proposes a high efficiency Class A power amplifier with the Class D switching power amplifier and floating power supplies. This paper proposes a novel high efficiency Class A amplifier accompanied to the high dynamic switching power supply and without floating power supplies. This amplifier has the merits of both Class A and Class D. The efficiency is seventy-four percent at full power rating. The distortion is about the same as that of Class A amplifiers. The -3dB bandwidth is from DC to 100 kHz.
Author:
Jeong, Jae Hoon
Affiliation:
Seoul Telecommunications O&M Research Center, Seoul, Korea
AES Convention:
104 (May 1998)
Paper Number:
4715
Publication Date:
May 1, 1998
Subject:
Audio Electronics
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