Title :
A class D switching power amplifier with high efficiency and wide bandwidth by dual feedback loops
Author :
Jeong, Jae H. ; Seong, H.H. ; Yi, Jcong H. ; Cho, Gyu H.
Author_Institution :
Korea Adv. Inst. of Sci. & Technol., Taejon, South Korea
Abstract :
The pulse width modulated class D power amplifier has the highest efficiency among various classes of amplifiers. However the performances, such as bandwidth, distortion and stability are inferior to those of the conventional class A or B. This paper presents a new class D amplifier employing dual feedback loops, namely current and voltage feedback considering complex impedances of the loudspeakers. The novel class D amplifier provides wide full-power bandwidth and stability at any load with high efficiency
Keywords :
audio-frequency amplifiers; electric distortion; feedback amplifiers; power amplifiers; pulse width modulation; switching circuits; bandwidth; complex impedances; current feedback; distortion; dual feedback loops; efficiency; loudspeakers; pulse width modulated class D power amplifier; stability; voltage feedback; Bandwidth; Feedback loop; High power amplifiers; Impedance; Loudspeakers; Pulse amplifiers; Pulse width modulation; Space vector pulse width modulation; Stability; Voltage;
Conference_Titel :
Consumer Electronics, 1995., Proceedings of International Conference on
Conference_Location :
Rosemont, IL
Print_ISBN :
0-7803-2140-5
DOI :
10.1109/ICCE.1995.518049
