Patents by Inventor Katsuhiro Shimohigashi

Katsuhiro Shimohigashi 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).

  • Dynamic memory with an interchangeable pair of data lines and sense amplifiers
    Patent number: 4367540
    Abstract: Four adjacent data lines are divided into two pairs. A first pair of the data lines is connected to one differential sense amplifier and a second pair of the data lines is connected to another differential sense amplifier, and vice versa, depending upon from which of the four data lines information are to be read out.
    Type: Grant
    Filed: December 22, 1980
    Date of Patent: January 4, 1983
    Assignee: Hitachi, Ltd.
    Inventor: Katsuhiro Shimohigashi
  • Signal detector for a semiconductor memory device
    Patent number: 3931538
    Abstract: Signal detector consisting of a flip-flop that is provided with at least a pair of inverters with the output of each inverter connected with the input of the other through a positive feedback loop and means to trigger said flip-flop at arbitrary times, the input of one of said inverters being connected to the signal line with both inverters designed to be electrically unbalanced between themselves.
    Type: Grant
    Filed: October 9, 1973
    Date of Patent: January 6, 1976
    Assignee: Hitachi, Ltd.
    Inventors: Kiyoo Itoh, Keisuke Hashizume, Katsuhiro Shimohigashi