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A power-efficient current generator with common mode signal autozero feedback for bioimpedance measurement applications

Wu, Y; Jiang, D; Langlois, P; Bayford, R; Demosthenous, A; (2019) A power-efficient current generator with common mode signal autozero feedback for bioimpedance measurement applications. In: Miyanaga, Yoshikazu and Kiya, Hitoshi and Gabbouj, Moncef, (eds.) Proceedings of the International Symposium on Circuits and Systems (ISCAS 2019). IEEE: New York, USA. Green open access

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Abstract

This paper describes the design of fully differential sine pulse-width-modulation (SPWM) wave current generator for bioimpedance measurement applications. The current generator has been designed in a 0.18-µm CMOS technology. Its analog front-end operates from ±1.65 V and has a current consumption of + + ( ×. ) where is the output current and is the operating frequency. It can provide outputs from to of SPWM current up to 98 kHz with a maximum voltage compliance of ±1.25 V. Using linear current feedback, the current generator has a designed transconductance of /. Feedback also enables cancellation of common mode signals and a high output impedance.

Type: Proceedings paper
Title: A power-efficient current generator with common mode signal autozero feedback for bioimpedance measurement applications
Event: International Symposium on Circuits and Systems (ISCAS 2019), 26-29 May 2019, Sapporo, Japan
ISBN-13: 9781728103976
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ISCAS.2019.8702546
Publisher version: https://doi.org/10.1109/ISCAS.2019.8702546
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: Generators, Voltage measurement, Current measurement, Impedance, Bioimpedance, Transconductance, Voltage control
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/10077822
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