CMOS image sensor having common outputting transistors and method for driving the same

摘要

The present invention provides a CMOS (Complementary Metal Oxide Semiconductor) image sensor including a unit pixel, wherein the unit pixel includes photodiodes for receiving incident light and for generating photo charges, single sensing node for selectively receiving the photo charges outputted from the photodiodes; a reset transistor for resetting the single sensing node; and a drive transistor for outputting electrical signals corresponding to voltage levels of the single sensing node, and wherein the CMOS image sensor samples the electrical signals through the correlated double sampling and then outputs a final image value to an external device.