Structured electronic design of high-pass ΣΔ converters and their application to cardiac signal acquisition

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Abstract

Achieving an accurate sub-Hz high-pass (HP) cutoff frequency and simultaneously a high accuracy of the transfer function is a challenge in the implementation of analog-to-digital converters for biomedical ExG signals. A structured electronic design approach based on state-space forms is proposed to develop HPΣΔ modulators targeting high accuracy of the HP cutoff frequency and good linearity. Intermediate transfer functions are mathematically evaluated to compare the proposed HPΣΔ topologies with respect to dynamic range. Finally, to illustrate the design method, an orthonormal HPΣΔ modulator is designed to be implemented in 0.18 μm technology which achieves a linearity of 12-bits.
Original languageEnglish
Title of host publicationConference Proceedings - IEEE International Symposium on Circuits and Systems, ISCAS 2017
Place of PublicationPiscataway, NJ
PublisherIEEE
Pages2416-2419
Number of pages4
ISBN (Electronic)978-1-4673-6853-7
ISBN (Print)978-1-4673-6852-0
DOIs
Publication statusPublished - 2017
EventISCAS 2017 - IEEE International Symposium on Circuits and Systems: From Dreams to Innovation - Baltimore, MD, United States
Duration: 28 May 201731 May 2017
Conference number: 50
http://iscas2017.org/

Conference

ConferenceISCAS 2017 - IEEE International Symposium on Circuits and Systems
Abbreviated titleISCAS
CountryUnited States
CityBaltimore, MD
Period28/05/1731/05/17
Internet address

Bibliographical note

Accepted author manuscript

Keywords

  • Topology
  • Frequency modulation
  • Transfer functions
  • Linearity
  • Mathematical model
  • Cutoff frequency

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