:-Today's requirement of multichannel audio system can be full filled by using the TAS5508 eight channel digital pulse width modulator which provides both advanced performance & a high level of system integration. Multichannel audio system using PWM based open-loop digital class-d audio power amplifier pusses a fundamental problem of inherent nonlinearity of PWM process. This can be overcome by using a high performance digital power amplifier TAS5121 from Texas instruments incorporate in. The dynamic range control (DRC) techniques described to get the both compression & expansion capabilities over the three separate & definable regions of audio signal levels. Loudness compatioation is explained & the performance of demodulation filter is given to attenuate the high frequency components of the output signals that are out of the audio band. Lastly the performance analysis is given.
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