Patents by Inventor Naoko Itoga

Naoko Itoga 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 device
    Patent number: 7310274
    Abstract: A semiconductor device includes a first memory block having a first address space, a second memory block having a second address space which is smaller than the first address space, and a test circuit which supplies a test address and a test control signal to the first memory block and the second memory block, and tests the first memory block and the second memory block simultaneously. The second memory block has a storage circuit which stores an address corresponding to the second address space, and a control circuit which inactivates the test control signal when the test address falls outside the second address space.
    Type: Grant
    Filed: March 3, 2005
    Date of Patent: December 18, 2007
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Naoko Itoga, Hitoshi Iwai
  • Semiconductor device
    Publication number: 20060090107
    Abstract: A semiconductor device includes a first memory block having a first address space, a second memory block having a second address space which is smaller than the first address space, and a test circuit which supplies a test address and a test control signal to the first memory block and the second memory block, and tests the first memory block and the second memory block simultaneously. The second memory block has a storage circuit which stores an address corresponding to the second address space, and a control circuit which inactivates the test control signal when the test address falls outside the second address space.
    Type: Application
    Filed: March 3, 2005
    Publication date: April 27, 2006
    Inventors: Naoko Itoga, Hitoshi Iwai