Patents by Inventor Yukio Kitaguchi

Yukio Kitaguchi 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).

  • Semiconductor memory
    Patent number: 5287318
    Abstract: In a flash-type electrically erasable programmable read-only memory (EEPROM), the erasure block decoder provided in the row decoder outputs a signal for simultaneously driving half the erasure line drivers in the erasure line driver array, or a signal for simultaneously driving the other half of the erasure line drivers in the erasure line driver array, according to an externally applied address signal. Therefore, the erasure operation test of all the blocks corresponding one-to-one to the erasure line drivers can be completed in two erasure operations, one for each corresponding half of the memory.
    Type: Grant
    Filed: February 14, 1992
    Date of Patent: February 15, 1994
    Assignee: Sharp Kabushiki Kaisha
    Inventors: Masaru Kuki, Yukio Kitaguchi