A high-resolution oscillator based resistance-to-digital converter with non-linearity canceling feedback by Δς modulated variable resistor

Shuya Nakagawa, Takumi Miyazaki, Hiroki Ishikuro

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

Abstract

A Time-Domain Resistance-to-Digital Converter (RDC) with a referential 1-bit ΔΣ Modulated variable resistor is proposed. The proposed RDC converts an input resistance to a frequency and compares a referential variable resistor to decrease a sensor read-out error caused by a non-linearity of an oscillation frequency. A 1-bit ΔΣ modulated variable resistor is demodulated by an oscillator and a counter. Hence a low-pass filter circuit is not required. In addition, non-linearity canceling feedback is proposed to decrease comparison time. This prototype RDC achieves 10.1bits conductance resolution at 1kSps in 10μS to 110μS full-scale range.

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

  • IoT
  • Resistance-to-digital converter
  • Resistive sensor
  • Sensor interface
  • Time-domain

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Fingerprint

Dive into the research topics of 'A high-resolution oscillator based resistance-to-digital converter with non-linearity canceling feedback by Δς modulated variable resistor'. Together they form a unique fingerprint.

Cite this