Improved phase detector
CA 2279443 C · Owner: Myer, Robert Evan · Inventors: Myer, Robert Evan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is a method and as apparatus for measuring phase differences between signals A and B using an absolute voltage value for each phase difference, between ~180°. This is accomplished using a third signal C which is a , signal having a phase, approximately equal to the average phase between signals A and B. Signals C and A are, subsequently amplitude limited and mixed to produce a fourth signal D which , is a signal having, associated an absolute voltage value for each degree of phase difference between ~180° for, signals A and B.
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 July 30, 1999 and granted December 25, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 30, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 30, 2021.
- 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.