Patent ID: 8878684

Claim:
A sensor array, comprising: a plurality of sensors fabricated on a monolithic semiconductor substrate, each of said plurality of sensors configured to measure an electrical property or a magnetic property of a specimen of interest, each of said plurality of sensors having an output terminal connected to said sensor with a respective switch, each of said plurality of sensors configured to provide a non-volatile signal at a respective output terminal thereof; an active core configured to be coupled to each of said respective output terminals of each of said plurality of sensors, said active core configured to sense said non-volatile signal of each of said plurality of sensors during a time period when said respective switch is closed; an oscillator configured to provide an oscillation signal to each of said sensors; a frequency counter, said frequency counter configured to be switchably coupled to each of said plurality of sensors, said frequency counter configured to count a number of transitions within a given counting time T and to provide said count as an output; and a controller configured to control a connectivity of said plurality of sensors with said oscillator and said frequency counter, and configured to provide as output a non-volatile signal representative of said count provided by said frequency counter for a respective one of said plurality of sensors during said given counting time T.