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A Low Power, Low THD Current Driver with Discrete Common-Mode Feedback for EIT Applications

Li, J; Wu, Y; Bayford, R; Jiang, D; Demosthenous, A; (2022) A Low Power, Low THD Current Driver with Discrete Common-Mode Feedback for EIT Applications. In: Proceedings of the 29th IEEE International Conference on Electronics, Circuits and Systems (ICECS) 2022. (pp. pp. 1-4). Institute of Electrical and Electronics Engineers (IEEE) Green open access

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Abstract

A low THD sinusoidal current driver for electrical impedance tomography (EIT) applications is proposed and analyzed in this paper. A discrete common-mode feedback method is proposed to increase the accuracy of the output current amplitude and output impedance. The current driver is designed in 65 nm technology under 3.3 V supply with a chip area of 0.0843 mm2. The maximum output current amplitude is 1.2 mA. In simulations the current driver achieves an average THD of 0.098% at 1 mA output current amplitude and 500 kHz output current frequency. The simulated output impedance is higher than 4 MΩ at a load impedance lower than 3.5 kΩ. The current consumption of the circuit is 1.47 mA and provides a current efficiency of 81.6%.

Type: Proceedings paper
Title: A Low Power, Low THD Current Driver with Discrete Common-Mode Feedback for EIT Applications
Event: ICECS 2022 - 29th IEEE International Conference on Electronics, Circuits and Systems
Location: Glasgow, Scotland
Dates: 24th-26th October 2022
ISBN-13: 9781665488235
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/ICECS202256217.2022.9971123
Publisher version: https://doi.org/10.1109/ICECS202256217.2022.997112...
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.
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/10164296
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