A Delta-Sigma Modulator with UPWM Quantizer for Digital Audio Class-D Amplifier

Chien Hung Kuo, Yu Jie Liou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In this paper, a delta-sigma modulator (DSM) with uniform pulse-width modulation (UPWM) quantizer for digital audio class-D power amplifier is presented. A pole-moving approach for Inverse Chebyshev filters is proposed to stabilize the UPWM modulator as well as improve its performance. The characteristics of the saw-Tooth carrier for UPWM quantizer is explored to reduce the output switching rate and the power loss in class-D amplifier in the pulse-density modulation (PDM) case. In the presented single-loop sixth-order UPWM modulator with the ameliorated saw-Tooth carrier, an SNDR of 120 dB within 20-kHz bandwidth can be achieved under full-scale signal input. With the proposed schemes, the highest transfer efficiency of 1 for digital class-D amplifier can also be obtained.

Original languageEnglish
Title of host publicationProceedings of the 26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019
EditorsAndrzej Napieralski
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages293-297
Number of pages5
ISBN (Electronic)9788363578152
DOIs
Publication statusPublished - 2019 Jun
Event26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019 - Rzeszow, Poland
Duration: 2019 Jun 272019 Jun 29

Publication series

NameProceedings of the 26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019

Conference

Conference26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019
CountryPoland
CityRzeszow
Period19/6/2719/6/29

Keywords

  • class-D amplifier
  • delta-sigma modulator
  • pole-moving
  • pulse-width modulation
  • saw-Tooth

ASJC Scopus subject areas

  • Hardware and Architecture
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Instrumentation

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  • Cite this

    Kuo, C. H., & Liou, Y. J. (2019). A Delta-Sigma Modulator with UPWM Quantizer for Digital Audio Class-D Amplifier. In A. Napieralski (Ed.), Proceedings of the 26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019 (pp. 293-297). [8787135] (Proceedings of the 26th International Conference "Mixed Design of Integrated Circuits and Systems", MIXDES 2019). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.23919/MIXDES.2019.8787135