CMOS IMAGE SENSOR INCLUDING PHOTOGATE STRUCTURE AND SENSING TRANSISTOR, OPERATING METHOD THEREOF, AND IMAGE PROCESSING SYSTEM INCLUDING SAME

摘要

A CMOS image sensor includes a pixel array comprising multiple pixels, wherein each pixel includes a photogate structure which is controlled based on a first gate voltage and a sensing transistor which includes a charge pocket region formed in a substrate region and is controlled based on a second gate voltage. The photogate structure collects charges generated in response to light incident upon the substrate region based on the first gate voltage. The sensing transistor controls at least one among the threshold voltage of the sensing transistor and the current flowing in the sensing transistor in response to charges transmitted from the photogate structure to the charge pocket region based on the difference between the first gate voltage and the second gate voltage.;COPYRIGHT KIPO 2014