Patents by Inventor Shoichi Kotoku

Shoichi Kotoku 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: 5666072
    Abstract: A semiconductor integrated circuit device having a plurality of logic circuits integrated on a semiconductor substrate is provided which can operate with a power source potential difference substantially less than 5 V. The logic circuit includes a bipolar transistor having a base and its collector-emitter current path coupled between a first power source terminal and an output terminal, together with at least one field effect transistor having its gate responsive to an input signal applied to an input terminal and its source-drain current path coupled between the first power source terminal and the base of the bipolar transistor. A semiconductor switch means is also provided which is responsive to the input signal applied to the input terminal for performing ON/OFF operations complementary to the ON/OFF operations of the bipolar transistor and which has a current path between its paired main terminals coupled between the output terminal and the second power source terminal.
    Type: Grant
    Filed: April 5, 1994
    Date of Patent: September 9, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Murabayashi, Yoji Nishio, Shoichi Kotoku, Kozaburo Kurita, Kazuo Kato
  • Patent number: 5377136
    Abstract: A semiconductor integrated circuit device with a built-in memory circuit group is disclosed, wherein wiring is started from a data terminal position near a data exchange portion of a memory circuit group to reduce the length of a wiring. Accordingly, an operation speed can be improved by the reduction of wiring capacitance and a ratio of unwired wirings can be reduced by reduction of an occupying ratio of wiring channels.
    Type: Grant
    Filed: June 15, 1993
    Date of Patent: December 27, 1994
    Assignees: Hitachi, Ltd., Hitachi Microcomputer Engineering, Ltd.
    Inventors: Yoji Nishio, Fumio Murabayashi, Shoichi Kotoku, Akira Uragami, Manabu Shibata, Yoshitatsu Kojima, Fumiaki Matsuzaki
  • Patent number: 5313116
    Abstract: A semiconductor integrated circuit device having a plurality of logic circuits integrated on a semiconductor substrate is provided which can operate with a power source potential difference substantially less than 5 V. The logic circuit includes a bipolar transistor having a base and its collector-emitter current path coupled between a first power source terminal and an output terminal, together with at least one field effect transistor having its gate responsive to an input signal applied to an input terminal and its source-drain current path coupled between the first power source terminal and the base of the bipolar transistor. A semiconductor switch means is also provided which is responsive to the input signal applied to the input terminal for performing ON/OFF operations complementary to the ON/OFF operations of the bipolar transistor and which has a current path between its paired main terminals coupled between the output terminal and the second power source terminal.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: May 17, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Murabayashi, Yoji Nishio, Shoichi Kotoku, Kozaburo Kurita, Kazuo Kato
  • Patent number: 5265045
    Abstract: A semiconductor integrated circuit device with a built-in memory circuit group is disclosed, wherein wiring is started from a data terminal position near a data exchange portion of a memory circuit group to reduce the length of a wiring. Accordingly, an operation speed can be improved by the reduction of wiring capacitance and a ratio of unwired wirings can be reduced by reduction of an occupying ratio of wiring channels.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: November 23, 1993
    Assignees: Hitachi, Ltd., Hitachi Microcomputer Engineering Ltd.
    Inventors: Yoji Nishio, Fumio Murabayashi, Shoichi Kotoku, Akira Uragami, Manabu Shibata, Yoshitatsu Kojima, Fumiaki Matsuzaki
  • Patent number: 5059821
    Abstract: A semiconductor integrated circuit device having a plurality of logic circuits integrated on a semiconductor substrate is provided which can operate with a power source potential difference substantially less than 5V. The logic circuit includes a bipolar transistor having a base and its collector-emitter current path coupled between a first power source terminal and an output terminal, together with at least one field effect transistor having its gate responsive to an input signal applied to an input terminal and its source-drain current path coupled between the first power source terminal and the base of the bipolar transistor. A semiconductor switch means is also provided which is responsive to the input signal applied to the input terminal for performing ON/OFF operations complementary to the ON/OFF operations of the bipolar transistor and which has a current path between its paired main terminals coupled between the output terminal and the second power source terminal.
    Type: Grant
    Filed: February 1, 1991
    Date of Patent: October 22, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Murabayashi, Yoji Nishio, Shoichi Kotoku, Kozaburo Kurita, Kazuo Kato
  • Patent number: 5001365
    Abstract: A semiconductor integrated circuit device having a plurality of logic circuits integrated on a semiconductor substrate is provided which can operate with a power source potential difference substantially less than 5 V. The logic circuit includes a bipolar transistor having a base and its collector-emitter current path coupled between a first power source terminal and an output terminal, together with at least one field effect transistor having its gate responsive to an input signal applied to an input terminal and its source-drain current path coupled between the first power source terminal and the base of the bipolar transistor. A semiconductor switch means is also provided which is responsive to the input signal applied to the input terminal for performing ON/OFF operations complementary to the ON/OFF operations of the bipolar transistor and which has a current path between its paired main terminals coupled between the output terminal and the second power source terminal.
    Type: Grant
    Filed: March 20, 1989
    Date of Patent: March 19, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Fumio Murabayashi, Yoji Nishio, Shoichi Kotoku, Kozaburo Kurita, Kazuo Kato