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1.2V Energy-Efficient Wireless CMOS Potentiostat for Amperometric Measurements

Valente, V; Neshatvar, N; Pilavaki, E; Schormans, M; Demosthenous, A; (2019) 1.2V Energy-Efficient Wireless CMOS Potentiostat for Amperometric Measurements. IEEE Transactions on Circuits and Systems II: Express Briefs 10.1109/tcsii.2019.2944258. (In press). Green open access

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Abstract

Wireless biosensors are playing a pivotal role in health monitoring, disease detection and management. The development of wireless biosensor nodes and networks strongly relies on the design of novel low-power, low-cost and flexible CMOS sensor readouts. This paper presents a CMOS potentiostat that integrates a control amplifier, a dual-slope ADC and a wireless unit on the same chip. It implements a novel time-based readout scheme, whereby the counter of the dual-slope ADC is moved to the receiver and the sensor current is encoded in the timing between two wireless pulses transmitted via pulse-harmonic modulation across an inductive link. Measured results show that the potentiostat chip can resolve a minimum input current of 10pA at a sampling frequency of 125 Hz and a power consumption of 12 μW.

Type: Article
Title: 1.2V Energy-Efficient Wireless CMOS Potentiostat for Amperometric Measurements
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/tcsii.2019.2944258
Publisher version: https://doi.org/10.1109/TCSII.2019.2944258
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: Wireless communication, Wireless sensor networks, Biosensors, Current measurement, Modulation, Capacitors
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/10083010
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