A high efficiency class A amplifier accompanied by class D switching amplifier

Author

Jeong, Jae Hoon ; Kim, Gue Hong ; Min, Byeong Rok ; Ahn, Che Hong ; Cho, Gyu Hyeong

Author_Institution

Korea Telecom, Seoul, South Korea

Volume

2

fYear

1997

fDate

22-27 Jun 1997

Firstpage

1210

Abstract

A high power class A amplifier has excellent fidelity but dissipates too much power. A class D amplifier has high efficiency but shows poor fidelity. This paper proposes a combination of a high fidelity class A power amplifier with class D power amplifier as variable power supply. This amplifier named as class I has the merits of both class A amplifier and class D. The efficiency is seventy-seven percent at full power rating. The distortion of the proposed amplifier is about the same as that of class A amplifier. The measured 3 dB bandwidth is from 10 Hz to 100 kHz

Keywords

power amplifiers; power supplies to apparatus; switching circuits; 10 Hz to 100 kHz; 77 percent; class A amplifier; class D switching amplifier; class I amplifier; distortion; high efficiency; high fidelity; high power; matching filter; power dissipation; variable power supply; Bandwidth; Distortion measurement; High power amplifiers; Linearity; Power amplifiers; Power dissipation; Power generation; Power supplies; Telecommunication switching; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1997. PESC '97 Record., 28th Annual IEEE

Conference_Location

St. Louis, MO

ISSN

0275-9306

Print_ISBN

0-7803-3840-5

Type

conf

DOI

10.1109/PESC.1997.616906

Filename

616906