Method for cancellation of the effect of charge feedthrough...

Details Method for cancellation of the effect of charge feedthrough... Method for cancellation of the effect of charge feedthrough...

2007-07-10

2007-07-10

Vu, Ngoc-Yen (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

C348S296000

Reexamination Certificate

active

10335677

ABSTRACT:
A method for determining a pixel output value of an imager; the imager having a plurality of pixels, a reset switch associated with each pixel and a select switch associated with each pixel; due to incident illumination upon a pixel of the imager after a reset period. The method captures a first pixel output value when the reset switch is OFF during a reset period and the select switch is ON during a reset period and captures a second pixel output value when the select switch is ON near an end of an integration period. If the second pixel output value is captured when the select switch is ON near an end of a first integration period, the first pixel output value may be captured when the reset switch is OFF during a reset period preceding the first integration period and the select switch is ON during a reset period preceding the first integration period. Moreover, if the second pixel output value is captured when the select switch is ON near an end of a first integration period, the first pixel output value may be captured when the reset switch is OFF during a reset period immediately following the first integration period and the select switch is ON during a reset period immediately following the first integration period.

REFERENCES:
patent: 6947087 (2005-09-01), Egawa et al.
patent: 6952226 (2005-10-01), Zhang et al.
patent: 7015964 (2006-03-01), Koizumi et al.
patent: 2002/0105581 (2002-08-01), Masaki et al.
“A 256×256 CMOS Imaging Array with Wide Dynamic Range Pixels and Column-Parallel Digital Output” Decker et al.IEEE Journal of Solid-StateCircuits. Dec. 1988. vol. 33, No. 12.

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