Patents by Inventor Bernard Duflot

Bernard Duflot has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • High-frequency tunable filter
    Patent number: 5376907
    Abstract: The high frequency tunable filter includes first and second oscillating circuits tuned by voltage-controlled varicap diodes and coupled together via coupling varicap diodes. The voltage-controlled varicap diodes for the tuning of the oscillating circuits and the coupling varicap diodes are controlled by an identical control voltage to obtain the tuning of the filter to its working frequency and to obtain the critical coupling of the two oscillating circuits. The filter finds particular application in the area of portable radio transceivers.
    Type: Grant
    Filed: March 16, 1993
    Date of Patent: December 27, 1994
    Assignee: Thomson-CSF
    Inventors: Bernard Duflot, Michel Byzery