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An array of 90 times 90 active pixel sensors (APS) that performs both in-pixel temporal intensity change detection and analog-to-digital conversion is presented. The 6-T 3-C 25mum times 25mum pixel fabricated on a 0.5mum 3M2P CMOS process provides a digital output of light intensity via an integrated single slope ADC. Using the programmable threshold of the pixel level comparator, the imager acquires...
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