Phase-locked loop apparatus
CA 2010265 C · Owner: Horie, Hiroshi · Inventors: Horie, Hiroshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1, Abstract of the Disclosure, A clock signal having a predetermined frequency output from a clock generator and a signal output from a voltage controlled oscillator (VCO) and supplied through a frequency divider are supplied to a phase detector. An output from the phase detector is supplied to a loop filter. The loop filter supplies a voltage in accordance with an output from the phase detector to a first control voltage terminal of the VCO and to a phase lock-in circuit. The phase lock-in circuit supplies a voltage in accordance with an output voltage from the loop filter to a second control voltage terminal of the VCO. In the VCO, the sensitivity of the first control voltage terminal is …
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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
- Filed February 16, 1990 and granted March 8, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 16, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 16, 2012.
- 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.