A signal-specific approach for reducing SAR-ADC power consumption

Ken Chia Han Chiang, N. Sertac Artan, H. Jonathan Chao

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

Abstract

A novel power optimization technique, called adaptive tracking is proposed in this paper for successive approximation analog-to-digital converters aiming implantable device applications. A SAR-ADC can easily be equipped with the proposed tracking technique by a minor modification in its digital circuitry (SAR). This work relies on the similarity of consecutive sample values in band-limited bio-potentials. The proposed adaptive tracking scheme can reduce power consumption of a wide variety of SAR-ADCs. In particular, we show that the tracking scheme can save 30% of power in a conventional SAR-ADC, 31% of power in those using binary SAR-ADCs using a weighted DAC with split MSB capacitor, and 8% of power in those using charge sharing DAC.

Original languageEnglish (US)
Title of host publication2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013
Pages278-281
Number of pages4
DOIs
StatePublished - Dec 1 2013
Event2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013 - Rotterdam, Netherlands
Duration: Oct 31 2013Nov 2 2013

Publication series

Name2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013

Other

Other2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013
CountryNetherlands
CityRotterdam
Period10/31/1311/2/13

Keywords

  • ADC
  • SAR
  • analog signals
  • tracking

ASJC Scopus subject areas

  • Hardware and Architecture
  • Biomedical Engineering
  • Electrical and Electronic Engineering

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  • Cite this

    Chiang, K. C. H., Artan, N. S., & Chao, H. J. (2013). A signal-specific approach for reducing SAR-ADC power consumption. In 2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013 (pp. 278-281). [6679693] (2013 IEEE Biomedical Circuits and Systems Conference, BioCAS 2013). https://doi.org/10.1109/BioCAS.2013.6679693