Apparatus and method for clamping reset voltage in image sensor

Details Apparatus and method for clamping reset voltage in image sensor Apparatus and method for clamping reset voltage in image sensor

2005-01-31

2008-09-09

Ho, Tuan V (Department: 2622)

Television

Camera, system and detail

Solid-state image sensor

C348S241000

Reexamination Certificate

active

07423680

ABSTRACT:
For clamping a reset voltage within an image sensor, an active pixel generates a first reset voltage, and an optical black pixel generates a second reset voltage. In addition, a reset voltage selector selects one of the first and second reset voltages as a selected reset voltage. Such a selected reset voltage is generated separately for each column of the array of pixels in the image sensor for more accurately and flexibly accounting for fabrication variations.

REFERENCES:
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patent: 6423957 (2002-07-01), Kim et al.
patent: 7098950 (2006-08-01), Yamamoto et al.
patent: 2003/0174226 (2003-09-01), Ahn et al.
patent: 2006/0001750 (2006-01-01), Mizuguchi et al.
Japanese Patent No. JP6006674 to Teruo et al., having Publication date of Jan. 14, 1994 (w/ English Abstract page).
Japanese Patent No. JP2003018468 to Shinji et al., having Publication date of Jan. 17, 2003 (w/ English Abstract page).
Korean Patent Application No. 1020020013115 to Ahn et al., having Publication date of Sep. 19, 2003 (w/ English Abstract page).

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