Patents by Inventor Kato Daisuke

Kato Daisuke 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).

  • Method and apparatus for redundancy word line replacement in a semiconductor memory device
    Patent number: 5555212
    Abstract: A method and apparatus for redundancy word line replacement in a semiconductor device involves generating a control signal which causes the data on the data lines to be flipped when the bit pattern of the memory cells coupled to a redundant word line are complementary to the bit pattern of the memory cells of a defective word line which is being replaced by the redundant word line. During both read and write operations, a data flip control signal is input to a data flip circuit to control the state of the bit information.
    Type: Grant
    Filed: September 19, 1994
    Date of Patent: September 10, 1996
    Assignees: Kabushiki Kaisha Toshiba, International Business Machines Corporation
    Inventors: Kirihata Toshiaki, Kato Daisuke