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Expired Canadian patentCanada

Switching voltage regulator with stabilized loop gain

CA 1300680 C · Owner: National Semiconductor Corporation · Inventors: Suzuki, Hidehiko

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 switching voltage regulator is stabilized against changes in input voltage by supressing the increase in loop gain due to increased input voltage. The reduction of loop gain is achieved by use of a modified triangle waveform which is compared to an error signal to switch the regulator output stage.

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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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 5, 1989
GrantedMay 12, 1992
Term endedMay 12, 2009
Patent numberCA 1300680 C
Classification (IPC)G05F1/61 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedSep 5, 1989Patent grantedMay 12, 1992Term endedMay 12, 2009

Sources & verification

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