Image sensor for low-noise voltage operation

Details Image sensor for low-noise voltage operation Image sensor for low-noise voltage operation

2007-10-03

2009-06-30

Epps, Georgia Y (Department: 2878)

Radiant energy

Photocells; circuits and apparatus

Photocell controlled circuit

C250S208100, C348S308000

Reexamination Certificate

active

07554074

ABSTRACT:
An image sensor operated in a pseudo pinch-off condition capable of reducing a reset voltage of a photodiode and reducing a dark current and fixed pattern noise generated due to discordance of characteristics between pixels is presented. The image sensor has a photosensitive pixel, a driving circuit and an intermediary circuit. The photosensitive pixel can have a photodiode generating a photoelectrons, a transfer transistor transferring the photoelectrons to a diffusion node, and a reset transistor resetting the diffusion node. The driving circuit generates a driving switching signal with respect to the transfer and resist transistors. The intermediary circuit changes characteristics of the signal to drive the photosensitive pixel in a pseudo pinch-off mode.

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http://highered.mcgraw-hill.com/sites/dl/free/0073191639/366537/Chapter—4.pdf.
Chris Parks et al; “Large area interline CCD with low dark current;” Sensors and Camera Systems for Scientific, Industrial, and Digital Photography Applications IV, Proceeding of SPIE-IS&T Electronic Imaging, SPIE vol. 5017 (2003).

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