64 pH-ISFET averaging array employing global negative current feedback
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 µm CMOS process also indicate improvements of high signal-to-noise ratio with power consumption to early µW. As a result, it all leads to benefit biomedical applications.
