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Low THD+N, Power Audio DAC Using PWM Technology

A method used to remove the distortion in a digital PWM amplifier is introduced. This method is based on correction factors added to each integrator of a multi-bits delta-sigma modulator loop. This results in a tremendous improvement in the distortion performance of the system. A dynamic range of 1OOdB is obtained, with all harmonics supressed below 102dB. It is particularly useful for digital audio amplifiers.

Authors: Gaboriau, Johann; Fei, Xiaofan; Walburger, Eric
Affiliation: Cirrus Logic Inc, Austin, TX
AES Conference:UK 16th Conference: Silicon for Audio (April 2001)
Paper Number:uk094 Import into BibTeX
Subject:Silicon for Audio

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