Title :
Digital control circuit for class-D audio power amplifier
Author :
Sozanski, K.P. ; Strzelecki, R. ; Fedyczak, Z.
Author_Institution :
Inst. of Electr. Eng., Tech. Univ. of Zielona Gora, Poland
fDate :
6/23/1905 12:00:00 AM
Abstract :
This paper describes a digital speaker system with a hybrid PWM digital modulator for a class-D power audio amplifier using the oversampling and noise-shaping techniques. Results of measurements of the output signal spectrum for the audio frequency band with a sinusoidal input signal are shown. The presented speaker system achieves a signal-to-noise ratio (SNR) near to 75 dB in the audio band (20 Hz to 20 kHz)
Keywords :
audio-frequency amplifiers; digital control; loudspeakers; power amplifiers; pulse width modulation; 20 Hz to 20 kHz; 75 dB; audio band; audio frequency band; class-D power audio amplifier; digital control circuit; digital speaker system; hybrid PWM digital modulator; noise-shaping; output signal spectrum measurements; oversampling; signal-to-noise ratio; sinusoidal input signal; Circuits; Digital control; Digital modulation; Filter bank; Loudspeakers; Noise shaping; Power amplifiers; Pulse amplifiers; Pulse modulation; Pulse width modulation;
Conference_Titel :
Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-7067-8
DOI :
10.1109/PESC.2001.954289
