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A CMOS current driver with built-in common-mode signal reduction capability for EIT

WU, Y; Langlois, P; Jiang, D; Bayford, R; Demosthenous, AC; (2017) A CMOS current driver with built-in common-mode signal reduction capability for EIT. In: Proceedings of ESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference. (pp. pp. 227-230). IEEE: Leuven, Belgium. Green open access

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Abstract

This paper presents an integrated fully differential current driver for wearable multi-frequency electrical impedance tomography (EIT). The integrated circuit (IC) comprises a wideband current driver (up to 500 kHz) functioning as the master for current sourcing, and a differential voltage receiver with common-mode feedback configuration as the slave for current sinking. The IC is fabricated in a 0.18-µm CMOS technology. It operates from ±1.65 V power supplies and occupies a total die area of less than 0.05 mm2 . The current driver has a measured output impedance of 750 kΩ at 500 kHz and provides a common-mode signal reduction of 32 dB at 500 kHz. The application of the IC in a wearable EIT lung monitoring system is presented.

Type: Proceedings paper
Title: A CMOS current driver with built-in common-mode signal reduction capability for EIT
Event: ESSCIRC 2017 - 43rd IEEE European Solid State Circuits Conference
Location: Leuven, Belgium
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ESSCIRC.2017.8094567
Publisher version: http://doi.org/10.1109/ESSCIRC.2017.8094567
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Tomography, Integrated circuits, Impedance, Current measurement, Electrodes, Lungs, Voltage measurement
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10041533
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