Patents by Inventor Erik M. R. Vanden Abeele

Erik M. R. Vanden Abeele 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).

  • Amplitude modulator having negative feedback circuit for reducing distortion
    Patent number: 5095290
    Abstract: Modulator circuit (MOD) with a modulator proper and a correction signal generator. The modulator proper comprises the cascade connection of an amplifier (T11, T21, CS11, T12, T22, CS12) and a first switching circuit (R11, T31, T51, R12, T32, T52), while the generator comprises the cascade connection of the same amplifier and a second switching circuit (R21, T61, T42, R22, T62, T41) having a correction output (P11, P12) coupled to a feedback input (P21, P22) of the amplifier via a feedback circuit (T71, R31, CS21, T72, R32, CS22). The amplifier and the switching circuits are controlled by a modulating signal and a carrier signal respectively and the first and second switching circuits provide a modulated output signal and a correction signal substantially equal to the envelope of the modulated output signal and used to decrease the modulator distortion.
    Type: Grant
    Filed: April 2, 1991
    Date of Patent: March 10, 1992
    Assignee: Alcatel N.V.
    Inventors: Joannes M. J. Sevenhans, Erik M. R. Vanden Abeele