1.2-V Energy-Efficient Wireless CMOS Potentiostat for Amperometric Measurements

Journal Article (2020)
Author(s)

V. Valente (University College London, TU Delft - Bio-Electronics)

Nazanin Neshatvar (University College London)

Evdokia Pilavaki (University College London)

Matthew Schormans (University College London)

Andreas Demosthenous (University College London)

Research Group
Bio-Electronics
DOI related publication
https://doi.org/10.1109/TCSII.2019.2944258
More Info
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Publication Year
2020
Language
English
Research Group
Bio-Electronics
Issue number
10
Volume number
67
Pages (from-to)
1700-1704

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 brief 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 .

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