Cmos imaging array with active pixels

Details Cmos imaging array with active pixels Cmos imaging array with active pixels

H - Electricity

04

N

H04N 5/335 (2006.01) H04N 3/15 (2006.01)

Patent

CA 2190615

An image sensing device comprising one or more pixels is disclosed, each pixel having a charge accumulation region for collecting charges generates by a photosensitive element such as a photodiode. An output signal is obtained from a pixel by placing a voltage potential across a resistive element, such as a FET channel, in which the resistance value is proportionately correlated to the magnitude of an electric field produced by the collected charges.

L'invention décrit un dispositif de détection d'images comportant un ou plusieurs pixels, dans lequel chaque pixel comporte une zone d'accumulation de charge destinée à recueillir les charges produites par un élément photosensible tel qu'une photodiode. Un signal de sortie est obtenu du pixel si un potentiel de tension est appliqué à un élément résistif, par exemple un canal de transistor à effet de champ, dans lequel la résistance est corrélée de façon proportionnelle à la grandeur d'un champ électrique produit par les charges accumulées.

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