Patent ID: 6777662
Filing Date: 2004-08-17
Classification: H04N

Abstract:
A pixel cell comprising:a reset transistor, said reset transistor including: a control node to be coupled to a first control signal; a second current electrode to be coupled to a voltage supply; and a first current electrode coupled to a floating node; a buffer transistor, said buffer transistor including: a control node coupled to said floating node; a second current electrode to be coupled to said voltage supply; and a first current electrode coupled to a second current electrode of an output control transistor; a transfer transistor, said transfer transistor including: a control node to be coupled to a second control signal; a second current electrode coupled to said floating node; and a first current electrode to provide an input of a photosensor; a shunt transistor, said shunt transistor including: a control node to be coupled to a shunt control signal; a second current electrode coupled to be coupled to said voltage supply; and a first current electrode to be coupled to said input of said photosensor; a photosensor, said photosensor including: an input coupled to said first current electrode of said shunt transistor and to said first current electrode of said transfer transistor; and an output coupled to a voltage return.