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Expired Canadian patentCanada

Fast master-oscillator lock-up

CA 1088636 A · Owner: Rca Corporation · Inventors: Aschwanden, Felix

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A synchronizing system is provided for synchronizing an oscillator having two or more substantially different frequencies, developed by division of the oscillator output frequency, from an external reference signal. The external reference is utilized as one input to a phase detector and to reset the divider. The divider is re-enabled by the external reference so that the next divider output is applied to the other input of the phase detector. The two inputs to the phase detector are now timed within a narrow range, which is within the pull-in range of the control loop which minimizes the phase lock up time for synchronizing to the external reference. -1-

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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 October 28, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 1997.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 25, 1977
GrantedOctober 28, 1980
Term endedOctober 28, 1997
Patent numberCA 1088636 A
Classification (IPC)H04N5/12 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedOct 25, 1977Patent grantedOct 28, 1980Term endedOct 28, 1997

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.