Patents by Inventor Tetsuyo Shigehiro

Tetsuyo Shigehiro 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).

  • Signal-level converter
    Patent number: 7161386
    Abstract: A signal-level converter is provided between a first terminal and a second terminal. The first terminal is connected to a first logic circuit operating at a first supply voltage higher than a given reference voltage. The second terminal is connected to a second logic circuit operating at a second supply voltage higher than the first supply voltage. The signal-level converter has a switching transistor that forms a current passage between the first and the second terminals in response to a control signal supplied to a gate of the switching transistor and a bus-hold circuitry, provided between the switching transistor and either the first or the second terminal as the output terminal, the other being the input terminal, and configured to convert a voltage level of a signal transferred via the switching transistor into another voltage level at the output terminal. The bus-hold circuitry may have two bus-hold circuits between the input and the output terminals, for two-way signal transfer.
    Type: Grant
    Filed: June 3, 2005
    Date of Patent: January 9, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akira Takiba, Toru Fujii, Tetsuyo Shigehiro
  • Signal-level converter
    Publication number: 20050219924
    Abstract: A signal-level converter is provided between a first terminal and a second terminal. The first terminal is connected to a first logic circuit operating at a first supply voltage higher than a given reference voltage. The second terminal is connected to a second logic circuit operating at a second supply voltage higher than the first supply voltage. The signal-level converter has a switching transistor that forms a current passage between the first and the second terminals in response to a control signal supplied to a gate of the switching transistor and a bus-hold circuitry, provided between the switching transistor and either the first or the second terminal as the output terminal, the other being the input terminal, and configured to convert a voltage level of a signal transferred via the switching transistor into another voltage level at the output terminal. The bus-hold circuitry may have two bus-hold circuits between the input and the output terminals, for two-way signal transfer.
    Type: Application
    Filed: June 3, 2005
    Publication date: October 6, 2005
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akira Takiba, Toru Fujii, Tetsuyo Shigehiro
  • Signal-level converter
    Patent number: 6933749
    Abstract: A signal-level converter is provided between a first terminal and a second terminal. The first terminal is connected to a first logic circuit operating at a first supply voltage higher than a given reference voltage. The second terminal is connected to a second logic circuit operating at a second supply voltage higher than the first supply voltage. The signal-level converter has a switching transistor that forms a current passage between the first and the second terminals in response to a control signal supplied to a gate of the switching transistor and a bus-hold circuitry, provided between the switching transistor and either the first or the second terminal as the output terminal, the other being the input terminal, and configured to convert a voltage level of a signal transferred via the switching transistor into another voltage level at the output terminal. The bus-hold circuitry may have two bus-hold circuits between the input and the output terminals, for two-way signal transfer.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: August 23, 2005
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Akira Takiba, Toru Fujii, Tetsuyo Shigehiro
  • Signal-level converter
    Publication number: 20040155679
    Abstract: A signal-level converter is provided between a first terminal and a second terminal. The first terminal is connected to a first logic circuit operating at a first supply voltage higher than a given reference voltage. The second terminal is connected to a second logic circuit operating at a second supply voltage higher than the first supply voltage. The signal-level converter has a switching transistor that forms a current passage between the first and the second terminals in response to a control signal supplied to a gate of the switching transistor and a bus-hold circuitry, provided between the switching transistor and either the first or the second terminal as the output terminal, the other being the input terminal, and configured to convert a voltage level of a signal transferred via the switching transistor into another voltage level at the output terminal. The bus-hold circuitry may have two bus-hold circuits between the input and the output terminals, for two-way signal transfer.
    Type: Application
    Filed: April 11, 2003
    Publication date: August 12, 2004
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Akira Takiba, Toru Fujii, Tetsuyo Shigehiro