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Convention Paper

A Three Level Trellis Noise Shaping Converter for Class D Amplifiers.

Authors: Ausiello, Ludovico; Rovatti, Riccardo; Setti, Gianluca

AES Convention 120 · Paper 6696 · May 2006

Abstract

Class D ampli ers can represent signals with three di erent output levels, +Vcc, 0, -Vcc, with no distortion. Exploiting this in order to achieve a better performance with no switching frequency increase, an extension to the classic Pulse Width Modulation two level A/D conversion is proposed. Coding is achieved by extending output waveforms of a Trellis based Sigma Delta Modulation to three levels. Simulation results have shown that, using the same symbol rate, a three level pattern achieved from 3:7 to 8:2 dB of SINAD improvement and a power consumption up to 5 times smaller.

Details

Published in
AES Convention 120
AES Convention
120
Paper number
6696
Publication date
May 6, 2006
Session subject
Signal Processing; High Resolution Audio
Affiliation
ARCES University of Bologna; ENDIF University of Ferrara (See document for exact affiliation information.)
Type
Convention Paper