Method for accessing a pixel and a device having pixel...

Details Method for accessing a pixel and a device having pixel... Method for accessing a pixel and a device having pixel...

2011-06-28

2011-06-28

Giles, Nicholas G (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S294000

Reexamination Certificate

active

07969476

ABSTRACT:
A method for accessing a pixel, the method includes: providing a fixed reference current to a readout circuit that is coupled to a pixel, wherein the fixed reference current is indifferent to changes in a pixel output current drained by the pixel; wherein a value of the pixel output current is responsive to light impinging on the pixel during an integration period; and sampling a difference signal that is responsive to a different between the fixed reference current and the pixel output current while providing the fixed reference current to the readout circuit.

REFERENCES:
patent: 5929434 (1999-07-01), Kozlowski et al.
patent: 6784931 (2004-08-01), Kudo
patent: 2004/0227831 (2004-11-01), Storm et al.

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