Continuous-time sigma-delta modulator design for wireless biomedical sensing applications

Yi Yang, Changzhi Li, David M. Binkley

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

6 Scopus citations

Abstract

This paper discusses the use of continuous-time sigma-delta modulators for ADCs in wireless biomedical sensing applications. The advantages of the proposed continuous-time sigma-delta modulators include the fact that it eliminates the need for an anti-aliasing filter in front of the ADC because of its intrinsic anti-alias filtering property. Additionally, the use of weak inversion and a low flicker noise structure minimizes power consumption and low frequency flicker noise. Finally, the decimation filter used in ordinary sigma-delta ADCs to attenuate high-frequency noise is eliminated because the biomedical sensor analyzes the periodogram in software, thus significantly reducing the cost and power consumption. A design example illustrating these advantages is presented in this paper.

Original languageEnglish
Title of host publication2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010
DOIs
StatePublished - 2010
Event2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010 - Melbourne, FL, United States
Duration: Apr 12 2010Apr 13 2010

Publication series

Name2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010

Conference

Conference2010 IEEE 11th Annual Wireless and Microwave Technology Conference, WAMICON 2010
CountryUnited States
CityMelbourne, FL
Period04/12/1004/13/10

Keywords

  • Analog-to-digital converter
  • Biomedical applications
  • Flicker noise
  • Non-contact
  • Sigma-delta modulator
  • Wireless sensor

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