Title :
A high efficiency 0.5W BTL class-D audio amplifier with RWDM technique
Author :
Li, S.C. ; Vincent Chia-Chang Lin
Author_Institution :
National Yunlin University of Seience and Technology
Abstract :
A novel class-D amplifier comprises a Rectangular Wave Delta Modulator (RWDM), bridged tied load (EITL) output gate-driver and low-pass filter. The rectangular wave delta modulator has a multiple inputs floatinggate hysteresis comparator and a feedback integrator formed by the L-R low-pass filter. This integrated amplifier has a flat hquency response with 43.3 dB up to 20 kHz, deliver up to 0.5 Wans with 97% power efficiency, and a distortion of less than 1% over power and Gequency range.
Keywords :
Circuits; Delta modulation; Feedback; Hysteresis; Low pass filters; Power amplifiers; Power generation; Pulse amplifiers; Pulse width modulation; Semiconductor optical amplifiers;
Conference_Titel :
Design Automation Conference, 2004. Proceedings of the ASP-DAC 2004. Asia and South Pacific
Conference_Location :
Yohohama, Japan
Print_ISBN :
0-7803-8175-0
DOI :
10.1109/ASPDAC.2004.1337586
