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Expired Canadian patentCanada

Threshold i2l circuit with hysteresis

CA 1067160 A · Owner: N.V. Philips Gloeilampenfabrieken · Inventors: Moussie, Michel

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

Hysteresis threshold circuit. This circuit comprises two complementary transistors and an output transistor with injector which is controlled by the collector of the second complementary transistor. The emitters of said second transistor and of the output transistor are interconnected whilst, the input of the circuit is constituted by the emitter of the first complementary transistor. Application in I2L et DCTL circuits in particular, for improving the immunity to noise in the connections between circuits.

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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 November 27, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 27, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedNovember 27, 1979
Term endedNovember 27, 1996
Patent numberCA 1067160 A
Classification (IPC)H03K17/60 +2 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedNov 27, 1979Term endedNov 27, 1996

Sources & verification

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