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A sensitivity and linearity improvement of a 100 dB dynamic range CMOS image sensor using a lateral overflow integration capacitor

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6 Author(s)
Akahane, N. ; Graduate Sch. of Eng., Tohoku Univ., Sendai, Japan ; Sugawa, S. ; Adachi, S. ; Mori, K.
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In a CMOS image sensor featuring a lateral overflow capacitor in a pixel, which integrates the overflowed charges from a frilly depleted photodiode during the same exposure, the sensitivity in non-saturated signal and the linearity in saturated overflow signal have been improved by introducing a new pixel circuit and its operation. A 1/3" VGA color CMOS image sensor has fabricated through 0.35 μm 2P3M CMOS process results in a 100 dB dynamic range characteristic, with improved sensitivity and linearity.

Published in:

VLSI Circuits, 2005. Digest of Technical Papers. 2005 Symposium on

Date of Conference:

16-18 June 2005