DocumentCode :
2775822
Title :
Spiking Chemical Sensor (SCS): A new platform for neuro-chemical sensing
Author :
Georgiou, Pantelis ; Triantis, Iasonas F. ; Constandinou, Timothy G. ; Toumazou, Chris
Author_Institution :
Imperial Coll. London
fYear :
2007
fDate :
2-5 May 2007
Firstpage :
126
Lastpage :
129
Abstract :
A spiking chemical sensor (SCS) is presented for detection of neurogenic ion concentration associated with active nerve fibres in nerve bundles. Based on the "integrate-and-fire" circuit, the SCS uses a chemically-modified ISFET front end encoding the sense data in the spike domain. Used in an array, it provides a spatio-temporal map of chemical activity around the nerve bundle which may be relayed off chip using low power asynchronous communication hardware. The circuit is shown to be tunable to yield a linear relation with either pH or actual hydrogen ion concentration. Furthermore, its compact pixel footprint in addition to efficient use of the sensing surface, makes it ideal for use in neuro-chemical imaging.
Keywords :
biosensors; chemical sensors; ion sensitive field effect transistors; ISFET; asynchronous communication hardware; chemical activity; hydrogen ion concentration; integrate-and-fire circuit; nerve bundle; nerve fibre; neuro-chemical imaging; neuro-chemical sensing; neurogenic ion concentration; pixel footprint; sense data; spatio-temporal map; spike domain; spiking chemical sensor; Bioelectric phenomena; Biomedical measurements; CMOS technology; Chemical sensors; Circuits; Hydrogen; Intelligent sensors; Monitoring; Sensor arrays; Sensor phenomena and characterization;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Neural Engineering, 2007. CNE '07. 3rd International IEEE/EMBS Conference on
Conference_Location :
Kohala Coast, HI
Print_ISBN :
1-4244-0792-3
Electronic_ISBN :
1-4244-0792-3
Type :
conf
DOI :
10.1109/CNE.2007.369628
Filename :
4227233
Link To Document :
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