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Expired Canadian patentCanada

Two phase voltage signal generating circuit

CA 1210086 A · Owner: Sony Corporation · Inventors: Tanaka, Kuninobu; Ishikawa, Fumio

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 two phase voltage signal generating circuit for generating a pair of trapezoidal wave signals of phases opposite to each other is disclosed which includes an input terminal supplied with an input pulse signal a capacitor, a pair of voltage limiting circuits connected to both ends of the capacitor respectively and for limiting the voltage at each end of the capacitor within a predetermined voltage range, a current control circuit controlled by the input pulse signal and for supplying a charge or discharge current to the capacitor to generate the pair of trapezoidal wave voltage of the trapezoidal wave voltage signals and a symmetry control circuit controlled by an output of the detecting …

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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 19, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 2003.
  • 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 28, 1984
GrantedAugust 19, 1986
Term endedAugust 19, 2003
Patent numberCA 1210086 A
Classification (IPC)H03K5/15 +2 more

Timeline

Timeline From CIPO dates

1985198719891991199319951997199920012003Application filedMay 28, 1984Patent grantedAug 19, 1986Term endedAug 19, 2003

Sources & verification

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