Method and circuit for obtaining a sample in an image sensor

Details Method and circuit for obtaining a sample in an image sensor Method and circuit for obtaining a sample in an image sensor

2008-04-01

2010-02-23

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C348S241000

Reexamination Certificate

active

07667181

ABSTRACT:
An image sensor and a method for acquiring images by sampling of the level of a voltage representative of the charge of a photodiode, in which a first sample is taken during a reset of the charge level of the photodiode; and a second sample is taken provided that the decrease slope of the voltage after the reset is lower than a threshold, said second sample replacing the first one.

REFERENCES:
patent: 6870496 (2005-03-01), Krymski et al.
patent: 2005/0030401 (2005-02-01), Ovsiannikov et al.
patent: 2005/0280737 (2005-12-01), Takayanagi
patent: 2006/0119717 (2006-06-01), Barna
patent: 2006/0170794 (2006-08-01), Higuchi et al.
patent: 2006/0170803 (2006-08-01), Lim
patent: 2006/0227226 (2006-10-01), Olsen
patent: 2006/0278809 (2006-12-01), Takayanagi

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