Title :
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
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;
Conference_Titel :
Power Electronics Specialists Conference, 1997. PESC '97 Record., 28th Annual IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-7803-3840-5
DOI :
10.1109/PESC.1997.616906
