CHANNEL GAIN CONTROLLER IN MULTI-CHANNEL PULSE WIDTH MODULATOR

摘要

PURPOSE: A channel gain controller in a multi-channel pulse width modulator is provided to variably control only a specific gain among a plurality of gains selectively by channels, and to make an audio signal which is inputted to a pulse width modulator have different levels for the channels. CONSTITUTION: A channel gain controller in a multi-channel pulse width modulator includes a plurality of pulse width modulators(11,12,13,14,15,16) and a gain controller. The plurality of pulse width modulators modulate PCM (pulse code modulation) multi-channel audio signals into PWM (pulse width modulation) multi-channel audio signals. The gain controller controls gains of the PCM multi-channel audio signals input to the plurality of pulse width modulators independently for each channel.