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Expired Canadian patentCanada

Direct dc to rf conversion by impulse excitation

CA 1292522 C · Owner: Rosen, Arye · Inventors: Lee, Chi Hsiang; Rosen, Arye

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

Abstract of the Disclosure, A device for converting DC to RF has a monolithic PIN diode adapted to be coupled to a DC supply. The diode receives light switching pulses and is coupled to a monolithic resonator. The monolithic form provides compactness and reliability, while the diode which is, reversed biased when OFF, prevents substrate leakage currents. The diode and the resonator can be made in a single substrate, e.g. silicon, or in different substrates, e.g. silicon for the diode to obtain a long carrier lifetime and, thus, minimize the light pulse repetition rate, and GaAs for the resonator to obtain a high Q. The resonator can also act as an impedance transformer.

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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 26, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 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 23, 1989
GrantedNovember 26, 1991
Term endedNovember 26, 2008
Patent numberCA 1292522 C
Classification (IPC)H03B9/14

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedFeb 23, 1989Patent grantedNov 26, 1991Term endedNov 26, 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.