Phase locked loop with d.c. modulation
CA 2033861 C · Owner: Emhiser Research Limited · Inventors: Lautzenhiser, Lloyd L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A D.C. modulated phase locked oscillator or electrical device, is, provided; and a radio frequency receiver or signal processing apparatus, is provided that utilizes the D.C. modulated phase locked oscillator. The D.C. modulated phase locked oscillator includes a phase locking oscillator and a D.C. modulator. Both a forward path and a feedback path are D.C. modulated. D.C. modulation of the feedback path optionally includes changing the frequency in the feedback path as a function of the: frequency of a modulation oscillator, changing the frequency in the feedback path by a plurality of pulses for each cycle of the modulation oscillator, removing pulses from the feedback path adding pulses …
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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 January 9, 1991 and granted September 29, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 9, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 9, 2013.
- 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.