Patents by Inventor Fumio Sandoh

Fumio Sandoh 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).

  • Patent number: 5160997
    Abstract: A semiconductor integrated circuit includes interconnection lines (7) between a plurality of circuit blocks (25-29) having different functions, and shield electrodes (70, 2a, 2b, 2c 3a, 3b, 3c, 5c1, 5c2, 6a1, 6a2) for protecting the interconnection lines (7) from undesirable radiation.
    Type: Grant
    Filed: April 11, 1991
    Date of Patent: November 3, 1992
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Fumio Sandoh, Kazuo Tomizuka
  • Patent number: 5111274
    Abstract: A semiconductor integrated circuit for a radio comprises: a front end circuit block (1) including at least an oscillation circuit (1b) and a mixing circuit (1c), for converting an RF signal to an IF signal; and an IF amplifying circuit block (2) for amplifying the IF signal and limiting an amplitude thereof, and the front end circuit block (1) is covered with shield electrodes (17, 17a, 17b, 17c) connected to a predetermined potential.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: May 5, 1992
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuo Tomizuka, Sakae Sugayama, Takao Saeki, Fumio Sandoh
  • Patent number: 5050238
    Abstract: A semiconductor integrated circuit for a radio comprises: a front end circuit block (1) including at least an oscillation circuit (1b) and a mixing circuit (1c), for converting an RF signal to an IF signal; and an IF amplifying circuit block (2) for amplifying the IF signal and limiting an amplitude thereof, and the front end circuit block (1) is covered with shield electrodes (17, 17a, 17b, 17c) connected to a predetermined potential.
    Type: Grant
    Filed: July 11, 1989
    Date of Patent: September 17, 1991
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuo Tomizuka, Sakae Sugayama, Takao Saeki, Fumio Sandoh