Pixel circuit for image sensor

Details Pixel circuit for image sensor Pixel circuit for image sensor

2007-04-17

2007-04-17

Allen, Stephone B. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S2140RC, C348S298000, C348S308000

Reexamination Certificate

active

11132496

ABSTRACT:
A pixel circuit for an image sensor uses a common reset transistor for resetting both of a photodiode node and a memory node. Respective transfer gates connect the common reset transistor to the photodiode node and to the memory node, and connect photodiode node and the memory node to each other. A source follower enabled with a row select gate provides a readout signal from the memory node. The use of the common reset transistor and the operational timing of the circuit elements improves fixed pattern noise arising from transistor feedthroughs in the pixel circuit.

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