Read-out circuit for infrared detectors
CA 2502467 C · Owner: Van Bogget, Urbain · Inventors: Van Bogget, Urbain
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is related to a device comprising a capacitive feedback transimpedance operational amplifier (11) that comprises a main operational , amplifier (107) (with a first input (121) a second input (122) and an output , (125)) and an integrating capacitor (106) connected between the second input , and the output and a first switch (105) connected in parallel to the integrating capacitor (106). The device further comprises an auto-zero operational amplifier (110) having a third input (123) and a fourth input (124), whereby to the third input (123) and the first input (121) signals at virtual ground potential are applied. The fourth input (124) is connected to the output …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed November 6, 2003 and granted July 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 6, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 6, 2025.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.