Phase locked loop circuit
CA 1094177 A · Owner: Sony Corporation · Inventors: Shibuya, Michio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a phase locked loop circuit which includes a variable frequency oscillator, a reference signal oscillator a phase comparator for detecting the phase difference between the output signals of the reference signal oscillator and the variable frequency oscillator, respectively and a low pass, filter supplied with the output of the comparator so as to provide a corresponding DC voltage for controlling the variable frequency oscillator, and in which the variable frequency oscillator is manually changed, as by a variable capacitor so, that the frequency thereof is an integral multiple of the frequency of the reference signal oscillator; a control signal generating circuit is provided to detect …
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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 January 20, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 20, 1998.
- 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.