Title :
A high efficiency filter-less class-D audio power amplifier
Author :
Lin, Yu-Jei ; Liou, Wan-Rone ; Yeh, Mei-Ling
Author_Institution :
Grad. Inst. of Electr. Eng., Nat. Taipei Univ., Taipei, Taiwan
Abstract :
This paper presents a class D power audio amplifier, using ternary pulse-width-modulation (PWM) method to eliminate output filter. BTL configuration eliminates the need for external coupling capacitors on the output. It operates with 1.5 V voltage supply. The efficiency can achieve 88%, and total harmonic distortion (THD) around 0.05% with 8 ¿ load at 10 KHz sine wave.
Keywords :
audio-frequency amplifiers; harmonic distortion; power amplifiers; PWM method; efficiency 88 percent; external coupling capacitors; frequency 10 kHz; high efficiency filterless class-D audio power amplifier; resistance 8 ohm; ternary pulse-width-modulation method; total harmonic distortion; voltage 1.5 V; Capacitors; High power amplifiers; Power amplifiers; Power filters; Power harmonic filters; Pulse amplifiers; Pulse width modulation; Space vector pulse width modulation; Total harmonic distortion; Voltage; Class D Amplifier; Filterless; ternary PWM;
Conference_Titel :
ASIC, 2009. ASICON '09. IEEE 8th International Conference on
Conference_Location :
Changsha, Hunan
Print_ISBN :
978-1-4244-3868-6
Electronic_ISBN :
978-1-4244-3870-9
DOI :
10.1109/ASICON.2009.5351406
