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Expired Canadian patentCanada

Peak amplitude detector

CA 1183580 A · Owner: Linear Technology Inc. · Inventors: Cole, William A.

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

An electronic device for generating a signal indicative of the peak magnitude of an alternating voltage signal is described. The device includes a voltage-to-current converter that generates a current signal comprising a quiescent current and an alternating current signal which varies directly with the alternating voltage signal. A current sink absorbs the current signal up to a controllable maximum current level. A charge current is generated when the current signal exceeds the maximum current level, and is delivered to a capacitor. Feedback circuitry varies the maximum current level of the current sink directly with the resulting capacitor voltage. The capacitor voltage is consequently …

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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 5, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2002.
  • 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 19, 1982
GrantedMarch 5, 1985
Term endedMarch 5, 2002
Patent numberCA 1183580 A
Classification (IPC)G01R19/04

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedFeb 19, 1982Patent grantedMarch 5, 1985Term endedMarch 5, 2002

Sources & verification

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