A low power audio delta-sigma modulator with opamp-shared and opamp-switched techniques

Hanqing Wang, Jian Xu, Xiaobo Wu

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

4 Scopus citations

Abstract

A high power efficient opamp-shared and opamp-switched delta-sigma modulator (DSM) has been presented. It employs a fourth-order single loop 17-level DSM with an input feed forward gain stage. It is shown that power consumption can be largely reduced by using half delay integrators and switched opamp, and sharing opamp between integrator stages. The proposed DSM, designed on 0.35μm TSMC process under 1.8V supply, achieves 121μW power dissipation with 20 kHz bandwidth and 111.9dB Signal-to-Quantization Noise Ratio (SQNR).

Original languageEnglish (US)
Title of host publicationProceedings of the International MultiConference of Engineers and Computer Scientists 2010, IMECS 2010
Pages1296-1300
Number of pages5
StatePublished - Dec 1 2010
EventInternational MultiConference of Engineers and Computer Scientists 2010, IMECS 2010 - Kowloon, Hong Kong
Duration: Mar 17 2010Mar 19 2010

Publication series

NameProceedings of the International MultiConference of Engineers and Computer Scientists 2010, IMECS 2010

Other

OtherInternational MultiConference of Engineers and Computer Scientists 2010, IMECS 2010
CountryHong Kong
CityKowloon
Period3/17/103/19/10

Keywords

  • Delta-sigma modulator (DSM)
  • Opamp shared technique
  • Switch capacitor (SC) circuit
  • Switched opamp technique

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