Wide-range and precise tissue impedance analysis circuit with ultralow current source using gate-induced drain-leakage current

Koji Kiyoyama, Yoshiki Takezawa, Tatsuya Goto, Keita Ito, Shoma Uno, Kenji Shimokawa, Satoru Nishino, Hisashi Kino, Tetsu Tanaka

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

1 Citation (Scopus)

Abstract

This paper presents a bioelectrical impedance analysis circuit with ultralow-current source using gate-induced drain-leakage (GIDL) current for biomedical applications. The proposed circuit consists of an ultralow-current reference circuit, a minimal voltage measurement block, a precise current source block, and a digital control logic circuit. The reference circuit generates pico-ampere-order currents based on GIDL current of an n-channel MOSFET. Fabricated in a 0.18μm 1P6M standard CMOS technology, the impedance analysis circuit occupies 0.27mm2 and can measure impedance range from 100Ω to 10MΩ. Experimental results shows that the fabricated current source using GIDL current generates a quite stable ultralow-current of 50pA, 100pA and 200pA, respectively. In addition, the proposed analysis circuit successfully measures the electrode-tissue interface impedance and tissue impedance by functional verification using monolayer and inhomogeneous agarose gel test setup phantom.

Original languageEnglish
Title of host publicationProceedings - 2016 IEEE Biomedical Circuits and Systems Conference, BioCAS 2016
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages304-307
Number of pages4
ISBN (Electronic)9781509029594
DOIs
Publication statusPublished - 2016 Jan 1
Event12th IEEE Biomedical Circuits and Systems Conference, BioCAS 2016 - Shanghai, China
Duration: 2016 Oct 172016 Oct 19

Publication series

NameProceedings - 2016 IEEE Biomedical Circuits and Systems Conference, BioCAS 2016

Other

Other12th IEEE Biomedical Circuits and Systems Conference, BioCAS 2016
CountryChina
CityShanghai
Period16/10/1716/10/19

Keywords

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

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Instrumentation
  • Biomedical Engineering

Fingerprint Dive into the research topics of 'Wide-range and precise tissue impedance analysis circuit with ultralow current source using gate-induced drain-leakage current'. Together they form a unique fingerprint.

  • Cite this

    Kiyoyama, K., Takezawa, Y., Goto, T., Ito, K., Uno, S., Shimokawa, K., Nishino, S., Kino, H., & Tanaka, T. (2016). Wide-range and precise tissue impedance analysis circuit with ultralow current source using gate-induced drain-leakage current. In Proceedings - 2016 IEEE Biomedical Circuits and Systems Conference, BioCAS 2016 (pp. 304-307). [7833792] (Proceedings - 2016 IEEE Biomedical Circuits and Systems Conference, BioCAS 2016). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/BioCAS.2016.7833792