Patent ID: 7317484

Claim:
A pixel circuit, comprising: a photodiode having a cathode; a reset transistor, wherein said reset transistor is a field effect transistor having a source connected to said cathode of said photodiode, and a drain; an output transistor, wherein said output transistor is a field effect transistor having a gate connected to said cathode of said photodiode and a source; a sample and hold circuit; means for electrically connecting said source of said output transistor to said sample and hold circuit or electrically isolating said source of said output transistor from said sample and hold circuit; a column select transistor, wherein said column select transistor is a field effect transistor having a drain connected to said sample and hold circuit, a gate connected to a column select input, and a source; a first capacitor connected between and an output node and said source of said column select transistor; a resistor connected between said output node and said drain of said reset transistor; a second capacitor connected between said output node and ground potential.