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Expired Canadian patentCanada

Signal amplifier apparatus with fail-safe limited gain

CA 1087696 A · Owner: Westinghouse Electric Corporation · Inventors: Matty, Thomas C.; Sahasrabudhe, Arun P.

CIPO record

Overview

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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 signal amplifier and clipper apparatus is disclosed including two four terminal capacitors and an operational amplifier to obtain fail-safe voltage gain which will not increase due to the failure of any element of the apparatus. A signal clipping operation is provided by the saturation of the operational amplifier output at the supply voltages, such that a maximum output signal level is provided by a fail-safe attenuator operation that will not decrease. -1-

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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 October 14, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 14, 1997.
  • 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 23, 1977
GrantedOctober 14, 1980
Term endedOctober 14, 1997
Patent numberCA 1087696 A
Classification (IPC)H03F1/34 +2 more

Timeline

Timeline From CIPO dates

1978198019821984198619881990199219941996Application filedFeb 23, 1977Patent grantedOct 14, 1980Term endedOct 14, 1997

Sources & verification

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