Photosensitive apparatus wherein an initial charge on a...

Details Photosensitive apparatus wherein an initial charge on a... Photosensitive apparatus wherein an initial charge on a...

2005-01-25

2005-01-25

Garber, Wendy R. (Department: 2612)

Television

Camera, system and detail

Solid-state image sensor

Reexamination Certificate

active

06847400

ABSTRACT:
In a photosensitive apparatus having photodiodes, such as a photosensor chip used in digital office equipment, a “fat zero” initial bias is injected on the photodiode. With every cycle of operation, a first fat zero is placed on the photodiode and then sampled. Then, a second fat zero is placed on the photodiode just before the integration of a light signal from an image being recorded. The light signal plus the second fat zero is transferred out of the photodiode and the sampled signal is subtracted therefrom, leaving only the light signal. The system obviates both fixed-pattern and some thermal noise within the apparatus.

REFERENCES:
patent: 5081536 (1992-01-01), Tandon et al.
patent: 5105277 (1992-04-01), Hayes et al.
patent: 5148268 (1992-09-01), Tandon et al.
patent: 5742047 (1998-04-01), Buhler et al.
patent: 6201270 (2001-03-01), Chen
patent: 6459077 (2002-10-01), Hynecek
patent: 6646247 (2003-11-01), Hosier et al.

Affiliated with

Also associated with

Rating

Photosensitive apparatus wherein an initial charge on a... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Photosensitive apparatus wherein an initial charge on a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photosensitive apparatus wherein an initial charge on a... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3433390