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Expired Canadian patentCanada

Circuit and method for performing equal duty cycle odd value clock division and clock synchronization

CA 1283175 C · Owner: Taylor, Mark · Inventors: Taylor, Mark

CIPO record

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

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Abstract From the Canadian patent

Abstract of the Disclosure, A circuit for dividing a master clock by an odd integral value and producing a 50% duty cycle. A state machine develops set and clear signals which are of a timing proportion of n: n + 1, where 2n + 1 is the divisor value. The set signal is provided to one input of a bistable multivibrator or S-R latch to set the multivibrator to a given state, while the clear signal is combined with the master clock signal to delay or disable the clearing of the multivibrator by 1/2 count of the master clock, so that an n + 1/2: n + 1/2 proportion output clock signal is developed. Additionally, the circuit includes a state machine which determines which of a series of differing …

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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 April 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 16, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 2, 1988
GrantedApril 16, 1991
Term endedApril 16, 2008
Patent numberCA 1283175 C
Classification (IPC)H03K21/10 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedMay 2, 1988Patent grantedApril 16, 1991Term endedApril 16, 2008

Sources & verification

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