Patent ID: 7148462

Claim:
An imager device comprising: a plurality of differential pixels organized as an array having rows and columns; and a plurality of output lines coupled to said differential pixels, each pixel outputting differential reset signals and differential pixel signals on a respective output line, wherein each differential pixel comprises: a plurality of photosensors, a plurality of transfer transistors, each transfer transistor connected to and transferring charge from a respective photosensor, a plurality of storage nodes, each node being coupled to a respective transfer transistor and storing charge transferred by a respective one of said plurality of photosensors, and a differential amplifier connected to said storage nodes and outputting a plurality of differential signals for each photosensor, said differential amplifier comprises two source follower transistors, each source follower transistor having a gate terminal connected to a respective storage node, a first source/drain terminal connected to one of said plurality of output lines, and a second source/drain terminal connected to a second node.