Patents by Inventor Ryuichi Izawa

Ryuichi Izawa 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).

  • Publication number: 20240069119
    Abstract: A first voltage detection device (30) detects a voltage of a lead portion (150) folded back between different battery cells (100). The first voltage detection device (30) includes a first voltage detection portion (410), a first voltage detection line (420) electrically connected to the first voltage detection portion (410), and a first holding body (300) holding the first voltage detection portion (410) and the first voltage detection line (420).
    Type: Application
    Filed: January 12, 2022
    Publication date: February 29, 2024
    Inventors: Takami IZAWA, Masayuki NAKAI, Yasuhiro YANAGIHARA, Ryuichi AMAGAI, Liping CUI
  • Patent number: 5371023
    Abstract: A novel gate circuit is disclosed. A first semiconductor switch includes a couple of main terminals connected between a first potential level and an output node, in which a high impedance state is held in response to an input signal having a first logic level and a second logic level, and the impedance state changes from high to low only during a transient period when the input signal changes substantially from the first to second logic level. A second semiconductor switch includes a couple of main terminals inserted between a second potential level different from the first potential level and the output node, in which a high impedance state is held in response to the input signal, and the impedance state changes from high to low only during a transient period when the input signal changes from the second to first logic level.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: December 6, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Masataka Minami, Mitsuru Hiraki, Kazuo Yano, Atsuo Watanabe, Kouichi Seki, Takahiro Nagano, Kazushige Sato, Keiichi Yoshizumi, Ryuichi Izawa
  • Patent number: 5053849
    Abstract: Herein disclosed is a semiconductor device of high density. The semiconductor device having a high density and a microstructure is required to have a high breakdown voltage and a high speed even with a low supply voltage. The semiconductor device comprises: a semiconductor body; a gate insulating film formed over the body; and a MOS transistor having a source/drain region formed in the body and a gate electrode film formed over the gate insulating film. The gate electrode film is composed of two or more films having different etching rates. The gate etching is stopped at the interface of the composite film to form an inverse-T gate electrode structure; and in that an electric conduction is observed between the component films. Thus, the overlap between the gate and the drain can be controlled.
    Type: Grant
    Filed: April 25, 1990
    Date of Patent: October 1, 1991
    Assignee: Hitachi, Ltd.
    Inventors: Ryuichi Izawa, Tokuo Kure, Shimpei Iijima, Eiji Takeda, Yasuo Igura, Akemi Hamada, Atsushi Hiraiwa
  • Patent number: 4392158
    Abstract: In a solid-state imaging device having a plurality of photodiodes which are arrayed in two dimensions on an identical semiconductor body, a group of horizontal switching elements and a group of vertical switching elements which pick up the photodiodes, and a horizontal scanning circuit and a vertical scanning circuit which impress scanning pulses on the horizontal and vertical switching elements respectively, and having an interlaced scanning mechanism which picks up a plurality of vertical scanning lines by means of interlace switching elements so as to permit horizontal scanning of scanning lines of a plurality of rows; a solid-state imaging device characterized in that said interlaced scanning mechanism includes insulated-gate field effect transistors for recovering voltage levels of the scanning pulses having undergone voltage drops due to the interlace switching elements.
    Type: Grant
    Filed: April 24, 1981
    Date of Patent: July 5, 1983
    Assignee: Hitachi, Ltd.
    Inventors: Masakazu Aoki, Haruhisa Ando, Shinya Ohba, Shoji Hanamura, Iwao Takemoto, Ryuichi Izawa
  • Patent number: 4349743
    Abstract: A solid-state imaging device wherein a MOS sensor is employed for a photosensor part, a CTD shift register is employed for a read-out circuit, first and second transfer gates are connected between vertical signal output lines and the CTD, and a reset gate is connected between a juncture of the first and second transfer gates and a reset voltage line. A method is adopted in which signal outputs of a plurality of rows are transferred to the CTD in a horizontal blanking period, and signals of a plurality of rows are simultaneously read out in a horizontal scanning period. At the signal transfer, bias charges are dumped into the vertical signal output lines from the CTD, and mixed charges consisting of the bias charges and signal charges are transferred to the CTD. Thereafter, the signals are read out.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: September 14, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Shinya Ohba, Shoji Hanamura, Toshifumi Ozaki, Masaharu Kubo, Masaaki Nakai, Kenji Takahashi, Masakazu Aoki, Iwao Takemoto, Haruhisa Ando, Ryuichi Izawa
  • Patent number: 4316205
    Abstract: In a solid-state imaging device having in one major surface region of a monolithic semiconductor body, photodiodes which are arrayed in two dimensions, vertical switching MOS transistors and horizontal switching MOS transistors which address the photodiodes, MOS transistors which constitute vertical and horizontal scanning circuits for turning "on" and "off" the switching MOS transistors, and MOS transistors which constitute other peripheral circuitry, the photodiodes being constructed of source regions of the vertical switching MOS transistors and the semiconductor body; a solid-state imaging device characterized in that among source and drain regions of the various MOS transistors, the source regions of the vertical switching MOS transistors are lower in the surface impurity concentration and deeper in the junction depth than the other source and drain regions.
    Type: Grant
    Filed: February 7, 1980
    Date of Patent: February 16, 1982
    Assignee: Hitachi, Ltd.
    Inventors: Masakazu Aoki, Iwao Takemoto, Masaharu Kubo, Ryuichi Izawa
  • Patent number: 4295055
    Abstract: A circuit for generating scanning pulses comprising a plurality of stages of basic circuits connected in series, said each basic circuit comprising first, second and third insulated gate field-effect transistors (MISTs) each of which has first and second terminals each being either of source and drain terminals and a gate terminal, said first terminal of said first MIST being used as a clock pulse-applying terminal, said gate terminal of said first MIST being used as an input terminal, said second terminal of said first MIST and said first terminal and said gate terminal of said second MIST being connected and used as a scanning pulse output terminal, said second terminal of said second MIST and said first terminal of said third MIST being connected and used as an output terminal, said second terminal of said third MIST being used as a ground terminal, said gate terminal of said third MIST being used as a feedback input terminal.
    Type: Grant
    Filed: June 6, 1979
    Date of Patent: October 13, 1981
    Assignees: Hitachi, Ltd., Hitachi Denshi Kabushiki Kaisha
    Inventors: Iwao Takemoto, Norio Koike, Shinya Ohba, Haruhisa Ando, Masaaki Nakai, Syoji Hanamura, Ryuichi Izawa, Masaharu Kubo, Masakazu Aoki, Shuhei Tanaka