DocumentCode :
1809988
Title :
A multi-frequency bioimpedance measurement ASIC for electrical impedance tomography
Author :
Triantis, Iasonas F. ; Demosthenous, Andreas ; Rahal, Mohamad ; Hong, Hongwei ; Bayford, Richard
Author_Institution :
Dept. of Electron. & Electr. Eng., UCL, London, UK
fYear :
2011
fDate :
12-16 Sept. 2011
Firstpage :
331
Lastpage :
334
Abstract :
This paper presents an integrated circuit for the measurement of tissue impedances. The circuit will be part of a wearable electrical impedance tomography based imaging system intended to be used for neonate lung function monitoring in intensive care units. The ASIC is designed to measure the real and imaginary parts of tissue impedances at two different frequencies simultaneously. It includes both circuitry for current injection and impedance measurement. The readout part employs synchronous chopping detection. The ASIC was fabricated in a 0.6-μm CMOS technology, occupies a core area of 4.5 mm2 and dissipates about 10 mW from ±2.5 V power supplies. It has wideband frequency operation, from DC to about 1 MHz, and a measurement accuracy of less than 1 Ω.
Keywords :
CMOS digital integrated circuits; application specific integrated circuits; biological tissues; biomedical electronics; biomedical measurement; electric impedance imaging; health care; integrated circuit design; lung; patient monitoring; readout electronics; tomography; CMOS technology; current injection; integrated circuit; intensive care unit; measurement accuracy; multifrequency bioimpedance measurement ASIC design; neonate lung function monitoring; readout electronics; size 0.6 mum; synchronous chopping detection; tissue impedance measurement; voltage 2.5 V to -2.5 V; wearable electrical impedance tomography; wideband frequency operation; Application specific integrated circuits; Current measurement; Electrodes; Frequency measurement; Impedance; Impedance measurement; Tomography;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
ESSCIRC (ESSCIRC), 2011 Proceedings of the
Conference_Location :
Helsinki
ISSN :
1930-8833
Print_ISBN :
978-1-4577-0703-2
Electronic_ISBN :
1930-8833
Type :
conf
DOI :
10.1109/ESSCIRC.2011.6044974
Filename :
6044974
Link To Document :
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