Patent ID: 6844897
Filing Date: 2005-01-18
Classification: H04N

Abstract:
1. An imaging device comprising: a plurality of active pixel sensor cells, each having a photosensor, a row select transistor, and an output transistor including a gate connected to a pixel output signal; and a readout circuit connectable to each of said active pixel sensor cells, said readout circuit including an amplifier, said amplifier comprising a first branch including the row select transistor and the output transistor of each of a plurality of said active pixel sensor cells and a first transistor having a different conductivity type than a conductivity type of the row select and output transistors, said amplifier comprising a second branch including at least a second transistor having a same conductivity type as the first transistor, a source follower transistor and at least one additional transistor having a same conductivity type as the row select and output transistors.