Imperial College London
Alternate

ProfessorPaulMitcheson

Faculty of Engineering, Department of Electrical and Electronic Engineering

Professor in Electrical Energy Conversion
 
 
 
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Contact

 

+44 (0)20 7594 6284paul.mitcheson

 
 
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Assistant

 

Miss Guler Eroglu +44 (0)20 7594 6170

 
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Location

 

1112Electrical EngineeringSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Douthwaite:2017:10.1109/TBCAS.2017.2727219,
author = {Douthwaite, M and Koutsos, E and Yates, DC and Mitcheson, PD and Georgiou, P},
doi = {10.1109/TBCAS.2017.2727219},
journal = {IEEE Transactions on Biomedical Circuits and Systems},
pages = {1324--1334},
title = {A thermally powered ISFET array for on-body pH measurement},
url = {http://dx.doi.org/10.1109/TBCAS.2017.2727219},
volume = {11},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Recent advances in electronics and electrochemical sensors have led to an emerging class of next generation wearables, detecting analytes in biofluids such as perspiration. Most of these devices utilize ion-selective electrodes (ISEs) as a detection method; however, ion-sensitive field-effect transistors (ISFETs) offer a solution with improved integration and a low power consumption. This work presents a wearable, thermoelectrically powered system composed of an application-specific integrated circuit (ASIC), two commercial power management integrated circuits and a network of commercial thermoelectric generators (TEGs). The ASIC is fabricated in 0.35 μm CMOS and contains an ISFET array designed to read pH as a current, a processing module which averages the signal to reduce noise and encodes it into a frequency, and a transmitter. The output frequency has a measured sensitivity of 6 to 8 kHz/pH for a pH range of 7-5. It is shown that the sensing array and processing module has a power consumption 6 μW and, therefore, can be entirely powered by body heat using a TEG. Array averaging is shown to reduce noise at these low power levels to 104 μV (input referred integrated noise), reducing the minimum detectable limit of the ASIC to 0.008 pH units. The work forms the foundation and proves the feasibility of battery-less, on-body electrochemical for perspiration analysis in sports science and healthcare applications.
AU  - Douthwaite,M
AU  - Koutsos,E
AU  - Yates,DC
AU  - Mitcheson,PD
AU  - Georgiou,P
DO  - 10.1109/TBCAS.2017.2727219
EP  - 1334
PY  - 2017///
SN  - 1932-4545
SP  - 1324
TI  - A thermally powered ISFET array for on-body pH measurement
T2  - IEEE Transactions on Biomedical Circuits and Systems
UR  - http://dx.doi.org/10.1109/TBCAS.2017.2727219
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000419340300016&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/65180
VL  - 11
ER  -
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