Patents by Inventor Katsuyoshi Sugimoto

Katsuyoshi Sugimoto 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).

  • Feed-forward amplifier and method of compensating non-linear distortion in the same
    Patent number: 6232838
    Abstract: A first vector modulator is inserted in the input route of an amplifier to vary the input signal of the amplifier. A second vector amplifier is inserted in the second signal route to vary the input signal of the second signal route. A controller controls the first vector modulator to minimize the distortion of the amplifier and controls the second modulator to equalize a change in input signal of the amplifier due to the control operation to a change in input signal of the second signal route.
    Type: Grant
    Filed: August 9, 2000
    Date of Patent: May 15, 2001
    Assignee: NEC Corporation
    Inventor: Katsuyoshi Sugimoto