A Highly Linear Amp-Less Interface Circuit for Capacitive Sensors with ΔΣ C-DAC

Yuya Maekawa, Syuya Nakagawa, Hiroki Ishikuro

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

Abstract

This paper proposes a low power amp-less interface circuit for capacitive sensors. In the proposed circuit, the charge on the sensor capacitance is compared to the charge on the reference capacitance and converted to a digital value by SAR logic. The proposed circuit can achieve high linearity by using a 1-bit digital ΔΣ modulator and single reference capacitance. The effectiveness of the proposed system was demonstrated by system simulation.

Original languageEnglish
Title of host publicationProceedings of 2020 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2020
EditorsXuan-Tu Tran, Duy-Hieu Bui
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages118-120
Number of pages3
ISBN (Electronic)9781728193960
DOIs
Publication statusPublished - 2020 Dec 8
Event16th IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2020 - Virtual, Halong, Viet Nam
Duration: 2020 Dec 82020 Dec 10

Publication series

NameProceedings of 2020 IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2020

Conference

Conference16th IEEE Asia Pacific Conference on Circuits and Systems, APCCAS 2020
CountryViet Nam
CityVirtual, Halong
Period20/12/820/12/10

Keywords

  • Amp-less
  • Capacitive sensor
  • ΔΣ

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Safety, Risk, Reliability and Quality
  • Artificial Intelligence
  • Computer Networks and Communications

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