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 100dB 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, Austin, TX
AES Convention: 111 (November 2001) Paper Number: 5428
Publication Date: November 1, 2001
Session Subject: Signal Processing; Coding of Audio Signals

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