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Digital control circuit for class-D audio power amplifier

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3 Author(s)
Sozanski, K.P. ; Inst. of Electr. Eng., Tech. Univ. of Zielona Gora, Poland ; Strzelecki, R. ; Fedyczak, Z.

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)

Published in:

Power Electronics Specialists Conference, 2001. PESC. 2001 IEEE 32nd Annual  (Volume:2 )

Date of Conference:

2001