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Expired Canadian patentCanada

Bicmos voltage reference generator

CA 1292277 C · Owner: Smith, Douglas D. · Inventors: Kertis, Robert A.; Smith, Douglas D.

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

8332-186 / 53.1115, BICMOS VOLTAGE REFERENCE GENERATOR ABSTRACT OF THE DISCLOSURE, A BICMOS voltage reference generator circuit generates and maintains a reference voltage within 3 mV over an 80°C temperature range and over a 1 volt change in power supply level. The circuit uses feedback from the output of the reference voltage generator to the current source supplying current to the voltage reference generator. This feedback increases the effective output impedance of the current source making the, reference voltage output substantially independent of power supply variations. The circuit operates with power supply differential as low as about 3 volts and, preferably is fabricated from …

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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 19, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 19, 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.
FiledFebruary 1, 1989
GrantedNovember 19, 1991
Term endedNovember 19, 2008
Patent numberCA 1292277 C
Classification (IPC)G05F3/24 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedFeb 1, 1989Patent grantedNov 19, 1991Term endedNov 19, 2008

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