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).
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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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