Optical sensor
AssigneesEcole Centrale De Lille, Universite Polytechnique Hauts-De-France, Centre National De La Recherche Scientifique, Yncrea Hauts De France, Universite De Lille
InventorsAlain Cappy, Francois Danneville, Virginie Hoel, Christophe Loyez, Ilias SOURIKOPOULOS
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Abstract
An optical sensor, especially an artificial retina, that includes at least one photosensitive cell. Each cell includes a integration capacitor, a read circuit the operation of which depends on the charge of the integration capacitor at least one MOS transistor operating subthreshold, and the drain-source current of which influences the charge on the integration capacitor, and at least one photodiode operating in photovoltaic mode and connected to the gate of this transistor, such that the drain-source current of the MOS transistor depends on the optical power received by the photodiode.
Claims17
An optical sensor comprising at least one photosensitive cell, each cell including:
- an integration capacitor,
- a read circuit the operation of which depends on the charge on the integration capacitor,
- at least one MOS transistor operating subthreshold, and the drain-source current of which influences the charge on the integration capacitor,
- at least one photodiode operating in photovoltaic mode and connected to the gate of this transistor, such that the drain-source current of the MOS transistor depends on the optical power received by the photodiode.
Dependencies are inferred from the claim text.