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Expired Canadian patentCanada

Versatile phase-locked loop phase detector

CA 1070395 A · Owner: Pertec Computer Corporation · Inventors: Cline, James E. D.; Abraham, Robert C.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A phase-locked loop is provided with a phase detector capable of providing phase error magnitude and direction information for synchronizing a voltage controlled oscillator with a train of data pulses spaced apart in integral multiples of a fundamental clock period using an edge-triggered flip-flop and simple digital logic gates.

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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 22, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 22, 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.
Filed—
GrantedJanuary 22, 1980
Term endedJanuary 22, 1997
Patent numberCA 1070395 A
Classification (IPC)H03L7/00 +1 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedJan 22, 1980Term endedJan 22, 1997

Sources & verification

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