Patent ID: 6025589
Filing Date: 2000-02-15
Classification: H04N

Abstract:
A color optical sensor array having at least two optical sensors that produce respective electrical signals proportionate to incident electromagnetic radiation comprising:the color optical sensors selected to respond to electromagnetic radiation in different portions of the visible color spectrum;each color optical sensor comprising a color photodetector which produces an electrical signal proportional to the intensity of electromagnetic radiation impinging the color photodetector in a selected range and an active integrator electrical circuit coupled to the output of the color photodetector;each active integrator electrical circuit comprising:an operational amplifier;an integrating voltage storage device coupled to the operational amplifier, the integrating voltage storage device matched to the color photodetector to normalize the electrical signal from the color photodetector during the accumulate and store cycle;an offset voltage storage device coupled to the operational amplifier, operable to store the voltage across the color photodetector during the offset cycle;a store voltage storage device coupled to the operational amplifier, operable to store the voltage proportional to the normalized voltage stored on the integrating voltage storage device; anda reference voltage coupled to the operational amplifier, operable to provide a constant voltage potential to the circuit; anda switching logic circuit, operable to control the timing of the active integrator electrical circuit.