System analysis of an optimal noise shaped quantizer for audio-band digital amplifier

Jwu-Sheng Hu*, Keng Yuan Chen

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This paper reports a novel application of receding finite horizon constrained optimization techniques to design an audio-band full digital amplifier. The digital amplifier using power MOSFET requires a modulator to modulate the reference signal into binary sequences. The modulator can be viewed as an over-sampled quantizer with noise-shaping requirement. One of the main issues in designing the modulator is to maintain stability while maximizing the range of the reference input signal. The quantization scheme resulting from the optimization is derived in detail to arrive at the stability condition under zero initial conditions. It shows the stability condition becomes more stringent when the relative degree of the shaping filter is high. Simulations results are given to illustrate the effectiveness of the design methodology.

Original languageEnglish
Title of host publicationProceedings of the 33rd Annual Conference of the IEEE Industrial Electronics Society, IECON
Pages1950-1955
Number of pages6
DOIs
StatePublished - 1 Dec 2007
Event33rd Annual Conference of the IEEE Industrial Electronics Society, IECON - Taipei, Taiwan
Duration: 5 Nov 20078 Nov 2007

Publication series

NameIECON Proceedings (Industrial Electronics Conference)

Conference

Conference33rd Annual Conference of the IEEE Industrial Electronics Society, IECON
CountryTaiwan
CityTaipei
Period5/11/078/11/07

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