Title :
64 pH-ISFET averaging array employing global negative current feedback
Author :
Chan, W.P. ; Premanode, B. ; Toumazou, C.
Author_Institution :
Dept. of Electr. & Electron. Eng., Imperial Coll. London, London
Abstract :
The previously reported discrete ISFET using current feedback has been redesigned in a CMOS platform with an array of ISFETs to improve the performance of the single ISFET´s readout. The circuit novelty is the averaging of ISFET currents generated by a cluster of 64 ISFETs with a global current feedback. Simulation results from the 0.18 mum CMOS process also indicate improvements of high signal-to-noise ratio with power consumption to early muW. As a result, it all leads to benefit biomedical applications.
Keywords :
CMOS integrated circuits; biomedical equipment; chemical sensors; ion sensitive field effect transistors; readout electronics; CMOS process; ISFET readout; biomedical application; chemical sensor; global negative current feedback; pH-ISFET sensor; power consumption; signal-to-noise ratio; size 0.18 mum;
Journal_Title :
Electronics Letters
DOI :
10.1049/el.2009.0215
