Patent ID: 6946637

Claim:
A photoelectric conversion device having a plurality of pixel cells each of which includes a photoelectric conversion element, a field effect transistor having a gate area for storing signal charge generated by said photoelectric conversion element and a source-drain path for outputting a signal corresponding to the signal charge stored in the gate, a first power supply line for supplying electric power to said field effect transistor, and a first switch connected between said field effect transistor and said first power supply line, wherein, when a reset voltage for resetting the gate of said field effect transistor is V sig0 , a threshold voltage of said field effect transistor is V th , current flowing through said field effect transistor is I a , a voltage applied via said first power supply line is V c1 , and a series resistance of said first switch is R on , each pixel cell satisfies a condition determined by V c1 −R on ×I a >V sig0 −V th , and each of said pixel cells further comprises a second switch for resetting said gate area of said field effect transistor, and said first switch and said second switch are field effect transistors having different threshold voltages from each other.