Patents by Inventor Toshiaki Takahira

Toshiaki Takahira 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 integrated circuit device having an improved operation control for a dynamic memory
    Patent number: 6301184
    Abstract: A DRAM module is applied to the system LSI which is provided with a standby mode for suppressing the whole operation thereof and an operation standby mode which permits at least the DRAM module to operate but suppresses the operation of other circuits. The above-mentioned modes as well as a substrate bias control technology are applied to the CMOS system LSI that operates on a low voltage. The system LSI is controlled to hold or not to hold data, enabling a memory of a large capacity to be mounted and consuming a sufficiently decreased amount of electric power.
    Type: Grant
    Filed: January 11, 2000
    Date of Patent: October 9, 2001
    Assignees: Hitachi, Ltd., Hitachi ULSI Systems Co., Ltd.
    Inventors: Toshio Sasaki, Yoshihiko Yasu, Kazumasa Yanagisawa, Yuji Tanaka, Toshiaki Takahira, Yasuto Igarashi, Mariko Ohtsuka, Yasunobu Aoki