High dynamic range cascaded integration pixel cell

Details High dynamic range cascaded integration pixel cell High dynamic range cascaded integration pixel cell

2005-03-24

2008-10-28

Epps, Georgia Y. (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S214100, C257S223000, C257S225000, C348S254000

Reexamination Certificate

active

07442910

ABSTRACT:
A cascaded imaging storage system for a pixel is disclosed for improving intrascene dynamic range. Charges accumulated in a first capacitor spill over into a second capacitor when a charge storage capacity of the first capacitor is exceeded. A third capacitor may also be provided such that charges accumulated by said second capacitor spill over into the third capacitor when the charge storage capacity of the second capacitor is exceeded.

REFERENCES:
patent: 5471515 (1995-11-01), Fossum et al.
patent: 5625210 (1997-04-01), Lee et al.
patent: 6204524 (2001-03-01), Rhodes
patent: 2003/0214591 (2003-11-01), Kakumoto

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