Image cell, in particular for an imaging chip

Details Image cell, in particular for an imaging chip Image cell, in particular for an imaging chip

H - Electricity

01

L

H01L 27/146 (2006.01)

Patent

CA 2132629

Disclosed is an image-recorder chip having a multiplicity of image cells, which are provided with field-effect transistors, disposed in the form of a two dimensional array and having a readout logic. This present invention is distinguished by, for projection of high input signal dynamics onto reduced output signal dynamics, the light-sensitive element of each image cell being connected to the one electrode of a first MOS transistor and to the gate of a second MOS transistor and by the other electrode of the first MOS transistor being connected to the one pole of a voltage supply source.

Puce de prise d'images comportant une pluralité de cellules d'images disposées sous la forme d'un banc d'images à deux dimensions, pourvues des transistors à effet de champ, et comportant également une logique de sortie. L'invention se caractérise par le fait que pour représenter une dynamique de signal d'entrée élevée sur une dynamique de signal de sortie réduite, l'élément photosensible de chaque cellule d'image est relié à l'une des électrodes d'un premier transistor MOS ainsi qu'à la grille d'un second transistor MOS et que l'autre électrode du premier transistor MOS est reliée à l'un des pôles d'une source de tension d'alimentation.

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