Eye quality monitor for a 2r regenerator
CA 2249800 C · Owner: Nortel Networks Limited · Inventors: Solheim, Alan Glen; Habel, Richard Achille; Anslow, Peter Jeremy
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The method of monitoring the quality of an optical signal at the site of a 2R or 1R regenerator, without performing a clock recovery operation is based on slicing the recovered voltage with a threshold voltage manipulated according to a pattern, and averaging the output of the slicer. An eye diagram is simulated by a diagram representing the average voltage versus the threshold voltage.
Read the whole patent
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 October 6, 1998 and granted December 9, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 6, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 6, 2020.
- 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
Timeline From CIPO dates
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.