A Reconfigurable Multimodal Sensor Interface IC Based on Direct-Conversion ΔΣ Modulator Structure

Jimin Koo, Yoontae Jung, Sein Oh, Sunglim Han, Sohmyung Ha, Minkyu Je

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

Abstract

This paper presents a ΔΣ-modulator-based reconfigurable multimodal sensor interface integrated circuit (IC), offering a novel approach to the multimodal measurement of voltage, capacitive, and current signals. A direct-conversion structure is employed in the multimodal sensor interface, and its reconfigurable ΔΣ modulation scheme ensures compact die area, high energy efficiency, and enhanced dynamic range. Fabricated in a 180-nm CMOS process, the multimodal sensor interface achieves measured dynamic ranges of 70.6 dB, 97.8 dB, and 60.0 dB for voltage, capacitance, and current modes, with measured power consumptions of 22.2 μW, 23.0 μW, and 37.7 μW, respectively. The proposed system demonstrates significant improvements in the dynamic range relative to power consumption compared to other state-of-the-art multimodal sensor interface IC designs.

Original languageEnglish (US)
Title of host publicationISCAS 2024 - IEEE International Symposium on Circuits and Systems
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9798350330991
DOIs
StatePublished - 2024
Event2024 IEEE International Symposium on Circuits and Systems, ISCAS 2024 - Singapore, Singapore
Duration: May 19 2024May 22 2024

Publication series

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

Conference

Conference2024 IEEE International Symposium on Circuits and Systems, ISCAS 2024
Country/TerritorySingapore
CitySingapore
Period5/19/245/22/24

Keywords

  • Bio-signal Acquisition
  • direct conversion
  • low power
  • multimodal sensor interface
  • reconfigurable
  • wide dynamic range
  • ΔΣ modulator

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

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