Rapidly converging phase-locked loop with a quadrant sensitive phase step size
CA 1313544 C · Owner: Easley, Matthew F. · Inventors: Nash, Randy D.; Easley, Matthew F.; Tjahjadi, Taruna
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
HIGH SPEED HALF DUPLEX MODEM WITH FAST TURNAROUND PROTOCOL", ABSTRACT OF THE INVENTION A phase locked loop circuit which, eliminates the phase difference between an incoming reference signal and a sampling signal by sampling the incoming reference signal to produce a sampled signal. The sign of the sampled signal at two sample points is compared to determine in which quadrant a predetermined one of these sample points is located. The phase adjustment to the sampling signal is dependent upon the quadrant in which this sample point is located and the magnitude of this sample point. A large phase difference produces a large phase adjustment so that this sample point is quickly locked onto the …
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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
- Granted February 9, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 9, 2010.
- 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.