Patents by Inventor Kazumasa Satou

Kazumasa Satou 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).

  • Quadratore demodulator circuit utilizing automatic frequency control signal and method thereof
    Patent number: 5341105
    Abstract: A circuit for regenerating a carrier, through coherent detection and demodulation of a quadrature modulated wave, is controlled by an improved AFC control to prevent possible false pull-in. The carrier regeneration circuit includes detector 1, a first multi-level code discriminator 2, a phase deviation detection circuit 3 and a voltage control oscillator 5.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: August 23, 1994
    Assignee: NEC Corporation
    Inventor: Kazumasa Satou