Patents by Inventor Kazuo Tomizuka

Kazuo Tomizuka 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).

  • Semiconductor integrated circuit with shield electrodes for protecting the interconnection lines from undesirable radiation
    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
  • Semiconductor integrated circuit having a pattern layout applicable to various custom ICs
    Patent number: 5155570
    Abstract: A semiconductor integrated circuit is formed on a semiconductor chip (1) and it includes: a plurality of mat regions (A to T) each including a plurality of circuit elements (10 to 13); partition regions (4) for spacing the mat regions (A to T) from each other; and a pair of power supply line (2) and ground line (3) disposed on each of the partition regions (4). An electronic circuit formed on the semiconductor chip (1) includes circuit blocks having different functions but it is designed for a unit of each mat (A to T) not for a unit of each circuit block.
    Type: Grant
    Filed: January 25, 1991
    Date of Patent: October 13, 1992
    Assignee: Sanyo Electric Co., Ltd.
    Inventors: Kazuo Tomizuka, Sakae Sugayama, Takao Saeki, Toshiaki Imai
  • Semiconductor integrated circuit with circuit blocks, dummy islands, and bias and shield electrodes
    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
  • Shielded front end receiver circuit with IF amplifier on an IC
    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