Patents by Inventor Fuminobu Tamase

Fuminobu Tamase 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).

  • Tuner circuit
    Patent number: 4843637
    Abstract: A tuner circuit for converting the frequency of an input signal with a local oscillator to a predetermined channel frequency. The tuner circuit includes an attenuation circuit responsive to the input signal for controlling the attenuated level of the input signal for reducing cross modulation and intermodulation distortions of the circuit, and for reducing distortion from the interference of the local oscillation, an amplifier circuit coupled to the attenuation circuit for amplifying the attenuated input signal, and a frequency conversion circuit coupled to the amplifier circuit for converting the frequency of the amplified input signal to a corresponding predetermined channel frequency.
    Type: Grant
    Filed: November 28, 1986
    Date of Patent: June 27, 1989
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Toshio Shimura, Masahiko Yamada, Yoshiteru Ishii, Fuminobu Tamase