Digital signal conversion apparatus and method, and computer-readable recording medium in which a digital signal conversion program is recorded

摘要

The digital signal conversion apparatus (2) comprises: an over-sampling circuit (21) that samples the input digital signal at high frequency; a polarity-inversion circuit (22) that inverts the polarity of the sampled digital signal; interpolation circuit (A) (23) and interpolation circuit (B) (24) that perform interpolation of each respective digital signal; noise-shaping circuit (A) (25) and noise-shaping circuit (B) (26) that perform noise shaping on the interpolated signals; PWM conversion circuit (A) (27) and PWM conversion circuit (B) (28) that perform PWM conversion on the noise-shaped signals; and a switching circuit (29) for driving a load based on the PWM signals from PWM conversion circuit (A) and PWM conversion circuit (B). <IMAGE>