Patents by Inventor Taiji Kondou

Taiji Kondou 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).

  • Digital demodulators for phase modulated and amplitude-phase modulated signals
    Patent number: 6130577
    Abstract: In a digital demodulator for phase modulated signals, logical values of a waveform-shaped phase-modulated signal are sampled based on a clock signal having a period that stands in integer ratio relationship to a carrier period of the modulated signal and thereafter subjected to serial/parallel conversion for each predetermined interval, whereby a logical pattern of a digital code train subjected to the serial/parallel conversion is analyzed. As a result, phase information required to demodulate digital data can be logically detected.
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: October 10, 2000
    Assignees: Hitachi, Ltd., Hitachi Tohbu Semiconductor, Ltd.
    Inventors: Yuko Tamba, Taiji Kondou, Katsuhiro Furukawa, Yukihito Ishihara