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A Sigma-Delta Digital Audio Power Amplifier-Design and FPGA Implementation

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We discuss the DSP design and implementation of a digital audio power amplifier using a FPGA. We concentrate on the sigma-delta modulator and associated bit-flipping architecture which is used to convert an oversampled PCM input signal into a 1'-bit code suitable for controlling a power switch. We discuss details of FPGA architecture and the optimizations required for implementation.

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