Patents by Inventor Futoshi Hayama

Futoshi Hayama 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 satellite broadcasting receiver
    Patent number: 5974095
    Abstract: A tuner part of a digital satellite broadcasting receiver includes an IF signal demodulator part and an I/Q signal demodulator part. These demodulator parts are formed on different substrates, and covered with different chassis respectively. Low-pass filters are provided between an amplifier circuit of the IF signal demodulator part and an output terminal and between an IF signal input terminal of the I/Q signal demodulator part and a baseband converter circuit respectively. Further, an AGC detector circuit for detecting the level of an IF signal for the baseband converter circuit is provided for controlling the amplifier circuit of the IF signal demodulator part by its AGC voltage.
    Type: Grant
    Filed: September 26, 1996
    Date of Patent: October 26, 1999
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Kazuo Kitaura, Tomoyuki Nagai, Futoshi Hayama