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Expired Canadian patentCanada

Circuit synchronization system

CA 1306775 C · Owner: Mips Technologies, Inc. · Inventors: Johnson, Mark G.; Hudson, Edwin L.

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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 system for synchronizing the operation of a CPU and coprocessor operating from a common clock signal includes a first voltage controlled delay line connected to receive the clock signal and delay it by a fixed time interval before supplying it to one of the CPU or coprocessor. A second voltage controlled delay line is connected to receive the clock signal and delay it by an adjustable time interval before supplying it to the other of the CPU or coprocessor. The time interval of the second delay line is determined by the potential of a control signal generated from a phase locked loop circuit coupled to the output terminals of the CPU and coprocessor, RCCO225:ch

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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 August 25, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 25, 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.
FiledFebruary 16, 1989
GrantedAugust 25, 1992
Term endedAugust 25, 2009
Patent numberCA 1306775 C
Classification (IPC)H03L7/00 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedFeb 16, 1989Patent grantedAug 25, 1992Term endedAug 25, 2009

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