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An Improved Wideband CMOS Current Driver for Bioimpedance Applications

Neshatvar, N; Langlois, P; Demosthenous, A; (2016) An Improved Wideband CMOS Current Driver for Bioimpedance Applications. In: 2016 IEEE International Symposium on Circuits and Systems (ISCAS). (pp. pp. 2447-2450). IEEE Green open access

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Abstract

A wideband, CMOS current driver for bioimpedance measurement applications has been designed employing nonlinear feedback. With the introduction of phase compensation, the circuit is able to operate at frequencies higher than the pole frequency of the output transconductor with minimum phase delay. Moreover, it isolates the poles required for stability from the high frequency characteristics of the output transconductor. The circuit has been simulated in a 0.35-μm CMOS technology and operates from ±2.5 V power supplies. Simulations show that for a 1 mAp-p output current, the phase delay is less than 1° for frequencies up to 3 MHz, rising to 1.5° at 5 MHz. Dual frequency currents to the load are demonstrated.

Type: Proceedings paper
Title: An Improved Wideband CMOS Current Driver for Bioimpedance Applications
Event: 2016 IEEE International Symposium on Circuits and Systems (ISCAS)
Location: Montreal, Canada
Dates: 22 May 2016 - 25 May 2016
ISBN: 97814799-53417
ISBN-13: 97814799-53424
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ISCAS.2016.7539087
Publisher version: http://doi.org/10.1109/ISCAS.2016.7539087
Language: English
Additional information: © 2016 IEEE. This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Science & Technology, Technology, Engineering, Electrical & Electronic, Engineering
UCL classification: UCL
UCL > Provost and Vice Provost Offices
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/1537699
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