A wide range and high accuracy sensor interface with switching regulator for coin-cell powered tiny wireless sensor node

K. Tatehora, Y. Shiiki, S. Nakagawa, T. Tanaka, K. Uchida, H. Ishikuro

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

1 Citation (Scopus)

Abstract

This paper presents a coin-cell powered small size wireless sensor node with a sensor bridge biased by an energy-efficient DC-DC converter. To reduce the switching noise of the DC-DC converter, a Wheatstone bridge with differentially balanced in wide resistance range is used. Circuit parameters, such as bridge resistances and amplifier offset are automatically set to the optimal values in the startup sequence. Proposed sensor interface achieved power reduction by 57.3% and intermittent operation further reduces the power consumption by 78.6% from which uses LDO. The developed tiny wireless sensor node with a nanoscale gas sensor device successfully demonstrated 100ppm hydrogen gas detection.

Original languageEnglish
Title of host publication2020 IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781728133201
Publication statusPublished - 2020
Event52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020 - Virtual, Online
Duration: 2020 Oct 102020 Oct 21

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
Volume2020-October
ISSN (Print)0271-4310

Conference

Conference52nd IEEE International Symposium on Circuits and Systems, ISCAS 2020
CityVirtual, Online
Period20/10/1020/10/21

Keywords

  • Analog-front-end
  • DC-DC converter
  • IoT
  • Sensor node
  • Switching regulator

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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