Audio digital/analog converter and audio processing apparatus having the same
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PURPOSE: An audio digital/analog converter and an audio processing device thereof are provided to sufficiently remove quantization noise by increasing an over-sampling rate and a quantization bit number. CONSTITUTION: A delta/sigma modulator(100) generates a multiple bit quantization signal by delta-sigma-modulating an oversampled digital signal. A pulse width modulator(200) generates a single bit pulse-width modulating signal by pulse-width-modulating the multiple bit quantization signal. An output part(300) comprises an analog filter which supplies an analog output signal by filtering the high frequency component of the pulse-width modulating signal. The pulse width modulator is composed of a symmetric pulse width modulator.