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1. (WO2017156477) IMAGE SENSORS WITH ELECTRONIC SHUTTER

Pub. No.:    WO/2017/156477    International Application No.:    PCT/US2017/021942
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 11 00:59:59 CET 2017
IPC: H04N 5/353
H04N 5/351
H01L 27/146
H01L 27/148
H04N 5/235
H04N 5/347
Applicants: INVISAGE TECHNOLOGIES, INC.
Inventors: MANDELLI, Emanuele
BOISVERT, David Michael
Title: IMAGE SENSORS WITH ELECTRONIC SHUTTER
Abstract:
In various embodiments, an image sensor and related method are disclosed. In an embodiment, an image sensor includes an optically sensitive material, and a pixel circuit including a sense node in electrical communication with the optically sensitive material. The pixel circuit stores an electrical signal proportional to an intensity of light incident on the optically sensitive material during an integration period. The pixel circuit includes a differential transistor pair in electrical communication with the optically sensitive material. The differential transistor pair includes a first transistor and a second transistor, with the first transistor being disposed between the optically sensitive material and the sense node. The differential transistor pair steers current between the optically sensitive material and the sense node through the first transistor during the integration period and steers current through the second transistor after the integration period to discontinue integration of the electrical signal onto the sense node.