Patent ID: 8869591

Claim:
An apparatus for sensing analyte, comprising: a plurality of sensor array columns, each sensor array column comprising a plurality of sensors, each sensor being adapted for sensing one or more parameters in reaction to the presence of one or more analytes and output a current therefrom in accordance with level of the sensed parameter; a heating element for selectively heating one or more of the sensor array columns; a Voltage Controlled Oscillator (VCO) array comprising a plurality of VCOs, each VCO receiving adapted to receive an output current from each of the plurality of sensors in a first of the plurality of sensor arrays and to receive an output current from one of the plurality of sensos in a second of the plurality of sensor arrays, and for generating an output oscillation frequency in accordance with the level of the received output current from the corresponding sensor in the first sensor array and the corresponding sensor in the second sensor array; and a counter array comprising a plurality of counters, each counter adapted to receive an output from a corresponding VCO and count a number of oscillations over a predetermined time.