A new high-efficiency and super-fidelity analog audio amplifier with the aid of digital switching amplifier: class K amplifier

Author

Jung, Nam-Sung ; Kim, Nam-In ; Cho, Gyu-Hyeong

Author_Institution

Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Seoul, South Korea

Volume

1

fYear

1998

fDate

17-22 May 1998

Firstpage

457

Abstract

This paper presents an audio amplifier that simultaneously has the advantages of digital and analog amplifier. The high efficiency is achieved by the digital amplifier, which is playing a role of dependent current source. The high fidelity is guaranteed by the analog amplifier playing a role of independent voltage source. Experimental results show that the proposed amplifier has 0.005% total harmonic distortion (THD) and around 90% power efficiency at 50 W output

Keywords

audio-frequency amplifiers; harmonic distortion; switching circuits; 50 W; 90 percent; analog amplifier; class K amplifier; dependent current source; digital switching amplifier; frequency response; high efficiency; high-efficiency; power efficiency; super-fidelity analog audio amplifier; total harmonic distortion; High power amplifiers; Power amplifiers; Pulse amplifiers; Pulse width modulation; Switching converters; Switching frequency; Switching loss; Topology; Total harmonic distortion; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE

Conference_Location

Fukuoka

ISSN

0275-9306

Print_ISBN

0-7803-4489-8

Type

conf

DOI

10.1109/PESC.1998.701938

Filename

701938