Patents by Inventor Abe Masayoshi

Abe Masayoshi 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).

  • Demodulator and receiver
    Patent number: 6714602
    Abstract: A high performance demodulator, capable of realizing further broadband characteristics, low distortion, a low power consumption, and small fluctuation in characteristics against fluctuations in temperature and fluctuations over time compared with a conventional multi-port demodulators, wherein a two-terminal first phase shifter 1004, three-terminal second branch circuit 1002, two-terminal second phase shifter 1005, and three-terminal third branch circuit 1003 are connected in series between a first signal input terminal TINSr for a reception signal and a second signal input terminal TINSlo for a local signal, a third terminal c of a first branch circuit 1001 is connected to a first power detection circuit 1006, a third terminal c of the second branch circuit 1002 is connected to a second power detection circuit 1007, and a third terminal c of the third branch circuit 1003 is connected to a third power detection circuit 1008, and comprising an N-port signal-IQ signal conversion circuit 1009 for receiving outpu
    Type: Grant
    Filed: October 4, 2002
    Date of Patent: March 30, 2004
    Assignees: Sony Corporation, Sony International (Europe) G.m.b.H.
    Inventors: Abe Masayoshi, Yukitoshi Sanada, Dragan Krupezvic, Veselin Brankovic