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Expired Canadian patentCanada

Bipolar ecl input circuit for cmos devices

CA 1285622 C · Owner: International Business Machines Corporation · Inventors: Wiedman, Francis W.; Pricer, Wilbur D.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

An ECL input circuit which receives an ECL input signal and which generates, in response to the input signal, a CMOS-compatible output signal. The input circuit includes a bipolar transistor, having its emitter region adapted to receive the ECL input signal, having its collector region coupled to a first current source, and having its base region connected to a second current source. The circuit further includes an output circuit which is coupled to the collector region of the bipolar transistor for providing the CMOS-compatible signal.

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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 July 2, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 2, 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.
FiledOctober 27, 1988
GrantedJuly 2, 1991
Term endedJuly 2, 2008
Patent numberCA 1285622 C
Classification (IPC)H03K19/09 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedOct 27, 1988Patent grantedJuly 2, 1991Term endedJuly 2, 2008

Sources & verification

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