Patents by Inventor Eiji Shinkai

Eiji Shinkai 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 device in which use of cache can be selected
    Patent number: 6381190
    Abstract: A semiconductor memory device, includes a plurality of banks, each of which includes a memory cell array and a sense amplifier section, a plurality of channel memories, a data control circuit, a first bus provided between the plurality of banks and the plurality of channel memories, a second bus provided between the plurality of channel memories and the data control circuit, and a third bus between the plurality of banks and the data control circuit. The data control circuit outputs write data to the sense amplifier section of a specified one of the plurality of banks via the third bus in a direct write access mode, and inputs read data from the sense amplifier section of a specified one of the plurality of banks via the third bus in a direct read access mode.
    Type: Grant
    Filed: May 11, 2000
    Date of Patent: April 30, 2002
    Assignee: NEC Corporation
    Inventor: Eiji Shinkai
  • Semiconductor device incorporating fuse-type roll call circuit
    Patent number: 5661689
    Abstract: A roll call circuit includes a series arrangement of a fuse and a switching element connected between a power supply terminal and a ground voltage terminal. The switching element is controlled by an internal test signal.
    Type: Grant
    Filed: January 31, 1996
    Date of Patent: August 26, 1997
    Assignee: NEC Corporation
    Inventor: Eiji Shinkai