Title :
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
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;
Conference_Titel :
Power Electronics Specialists Conference, 1998. PESC 98 Record. 29th Annual IEEE
Conference_Location :
Fukuoka
Print_ISBN :
0-7803-4489-8
DOI :
10.1109/PESC.1998.701938
