Patent ID: 7683953
Filing Date: 2010-03-23
Classification: H04N

Abstract:
1. A pixel sensor comprising: a photodiode having an anode coupled to a fixed potential and a cathode; a first reset transistor having a drain coupled to a first potential, a gate coupled to a first reset signal line providing a signal that toggles between an on state and an off state, and a source; a second reset transistor having a drain coupled to said source of said first reset transistor, a gate coupled to a second reset signal line providing a signal that toggles between an on state and an off state, and a source coupled to said cathode of said photodiode; a source-follower transistor having a drain coupled to said source of said first reset transistor, a gate coupled to said cathode of said photodiode, and a source; and a row-select transistor having a drain coupled to said source of said source-follower transistor, a gate coupled to a row-select signal line, and a source coupled to a column output line; and wherein: