Abstract
An audio signal reproduction device includes: a seven-dimensional delta-sigma modulation circuit for receiving a PCM signal and delta-sigma modulating the PCM signal; a PWM circuit for pulse-width modulating the signal output from the seven-dimensional delta-sigma modulation circuit and generating a one-bit digital signal; a switching amplifier for converting the one-bit digital signal into an analog signal and amplifying it; and a low-pass filter for removing the higher band component from the analog signal. With this configuration, it is possible to reduce the device size and weight.
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