Clock recovery circuit
CA 1298357 C · Owner: Pigeon, Joseph Pierre Robert Michel · Inventors: Pigeon, Joseph Pierre Robert Michel; Thomas, Robert Mclaren
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A clock recovery circuit includes a resonant circuit which is driven into oscillation at a clock frequency by binary 1 pulses in a data signal supplied thereto, a clock signal being derived from the resonant circuit via a buffer and a limiting amplifier. The resonant circuit has a high Q to accommodate long sequences of binary 0s during which it is not driven. In order to prevent over-driving when the data signal has a high density of binary 1s a level detector detects, when the oscillation amplitude exceeds a threshold level whereupon a, flip-flop is set to control a gate to inhibit driving of the resonant circuit until its oscillation amplitude has decayed. 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 March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
- 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.