An Energy Efficient Period-modulation-based Current-to-digital Converter for FET-type Sensors

Wonseok Heo, Hoyong Seong, Donghyun Youn, Minkyu Je, Sohmyung Ha

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

Abstract

This paper presents an energy-efficient current-to-digital converter with period modulation (PM) to support gas sensors based on a field-effect transistor (FET). A frequency-locked loop (FLL) converts sensor current signals into a periodic signal, which is then quantized by applying a low-noise on-chip RC oscillator. The RC oscillator with an edge combiner and a digital filter is applied to reduce quantization noise. In addition, a current digital-to-analog converter (I-DAC) at the FLL input is employed to reduce conversion time and energy. This work is implemented standalone to minimize the system costs. The proposed work is implemented in 180-nm CMOS process, achieving a fast conversion time of 4.1 μs and a superior FoMw of 208.4 fJ/c-s.

Original languageEnglish (US)
Title of host publicationProceedings - International SoC Design Conference 2024, ISOCC 2024
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages77-78
Number of pages2
ISBN (Electronic)9798350377088
DOIs
StatePublished - 2024
Event21st International System-on-Chip Design Conference, ISOCC 2024 - Sapporo, Japan
Duration: Aug 19 2024Aug 22 2024

Publication series

NameProceedings - International SoC Design Conference 2024, ISOCC 2024

Conference

Conference21st International System-on-Chip Design Conference, ISOCC 2024
Country/TerritoryJapan
CitySapporo
Period8/19/248/22/24

Keywords

  • current-to-digital converter
  • field-effect transistor (FET)
  • frequency-locked loop (FLL)
  • Gas sensor
  • period modulation (PM)
  • standalone

ASJC Scopus subject areas

  • Artificial Intelligence
  • Hardware and Architecture
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials

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