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Expired Canadian patentCanada

Digital signal delay circuit

CA 1251520 A · Owner: Sony/Tektronix Corporation · Inventors: Miki, Yasuhiko

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

A digital signal delay circuit which delays a pluraliry of digital input signals by a use of a single delay device group and a pluraliry of delay sections is disclosed. The delay device group generates a pluraliry of different phase clock signals. Each of the delay sections includes selection means for selecting one of the clock signals from the delay device group and latch means for latching the digital input signal in response to the output signal from the selection means. The output signal from the latch means is the delayed input signal, and a delay time is controlled by the selection means. The delay device group is used in common for the plurality of delay sections so that, 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 21, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 21, 2006.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMarch 25, 1985
GrantedMarch 21, 1989
Term endedMarch 21, 2006
Patent numberCA 1251520 A
Classification (IPC)H03K5/13 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedMarch 25, 1985Patent grantedMarch 21, 1989Term endedMarch 21, 2006

Sources & verification

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