Ultrawide range square wave impedance analysis circuit with ultra-slow ring-oscillator using gate-induced drain-leakage current

Yoshiki Takezawa, Koji Kiyoyama, Kenji Shimokawa, Zhengyang Qian, Hisashi Kino, Takafumi Fukushima, Tetsu Tanaka

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

Abstract

This paper presents area efficient and ultrawide range square wave impedance analysis circuit for biomedical applications. By using a gate-induced drain-leakage current (GIDL), we designed an ultralow current generation circuit which is a key component of the impedance measurement circuit and a GIDL-controlled oscillator operating at ultralow frequency. In addition, the area of the impedance measurement circuit becomes remarkably small due to square waveform current. All impedance measurement circuits are fabricated with a 0.18μm 1P6M standard CMOS technology and occupy 0.43mm2. As results, the proposed GIDL-controlled oscillator circuit successfully oscillated at ultralow frequency of 3.1Hz, and the impedance measurement circuit completely outputs square waveforms with a current amplitude of 50pA. The proposed circuit can measure impedance ranges from 100Ω to 100MΩ.

Original languageEnglish
Title of host publication2017 IEEE Biomedical Circuits and Systems Conference, BioCAS 2017 - Proceedings
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1-4
Number of pages4
ISBN (Electronic)9781509058037
DOIs
Publication statusPublished - 2018 Mar 23
Event2017 IEEE Biomedical Circuits and Systems Conference, BioCAS 2017 - Torino, Italy
Duration: 2017 Oct 192017 Oct 21

Publication series

Name2017 IEEE Biomedical Circuits and Systems Conference, BioCAS 2017 - Proceedings
Volume2018-January

Other

Other2017 IEEE Biomedical Circuits and Systems Conference, BioCAS 2017
CountryItaly
CityTorino
Period17/10/1917/10/21

Keywords

  • biosignal sensing
  • current source
  • gate-induced drain-leakage (GIDL) current
  • healthcare
  • impedance analysis

ASJC Scopus subject areas

  • Biomedical Engineering
  • Electrical and Electronic Engineering
  • Instrumentation

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    Takezawa, Y., Kiyoyama, K., Shimokawa, K., Qian, Z., Kino, H., Fukushima, T., & Tanaka, T. (2018). Ultrawide range square wave impedance analysis circuit with ultra-slow ring-oscillator using gate-induced drain-leakage current. In 2017 IEEE Biomedical Circuits and Systems Conference, BioCAS 2017 - Proceedings (pp. 1-4). [8325165] (2017 IEEE Biomedical Circuits and Systems Conference, BioCAS 2017 - Proceedings; Vol. 2018-January). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/BIOCAS.2017.8325165