Phase-locked loop circuit
CA 1269724 C · Owner: Rorden, William L. · Inventors: Rorden, William L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A phase-locked loop circuit receives an input signal that has a predetermined frequency during a succession of symbol intervals and of which the phase during a given symbol interval is related to the phase during a reference interval by the angle 2nw/N where N is a positive integer and n is an integer in the range from 0 to (N-1), and generates a reference signal of which the phase has a desired relationship to the phase of the input signal during the reference internal. The circuit comprises a controllable oscillator that is responsive to a control signal to generate the reference signal, the frequency of the reference signal being equal to the predetermined frequency when the value of 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 May 29, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 29, 2007.
- 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.