Patent ID: 6031217
Filing Date: 2000-02-29
Classification: G06K,H04N

Abstract:
An optical sensor for use in an optical sensor array to produce an electrical signal in response to electromagnetic radiation, comprising:a photodetector having an output proportional to the intensity of the electromagnetic radiation incident with the photodetector; andan active integrator electrical circuit coupled with the output of the photodetector to accumulate and store the electrical signal from the photodetector, said active integrator electical circuit further comprising:an operational amplifier having an offset correction, at least one non-inverting input, at least one inverting input and at least one output;a reference voltage supplied to the electrical circuit;the photodetector coupled to the operational amplifier inverting input and to the reference voltage;an integrating voltage storage device coupled to the operational amplifier inverting input and to the operational amplifier output for storing an accumulated electrical signal from the photodetector;a store voltage storage device coupled to the operational amplifier output and to the reference voltage for storing a voltage proportional to the voltage stored on the integrating voltage storage device; andan output bus coupled to the store voltage storage device; and the operational amplifier non-inverting input coupled to the reference voltage.