Patents by Inventor Shuko Yamauchi

Shuko Yamauchi 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).

  • Patent number: 5654931
    Abstract: A semiconductor integrated circuit device is divided into a plurality of blocks, which are individually equipped with signal generate units such that the signal generate units are distributed in the semiconductor integrated circuit device. The semiconductor integrated circuit device is preferably constructed to generate the pulse signal by the pulse generate units which are provided for the individual blocks, after all initial logic operations on the data and control signals have been taken. Thanks to this construction, an SRAM, for example, can have its write recovery time minimized to 0 so that it can achieve high-speed operations. Moreover, since predecoders are provided for the individual blocks, the wiring line number and area in the chip can be reduced to improve the degree of integration of the semiconductor integrated circuit device. Still moreover, signal delay and skew can be reduced in the chip so that high-speed can be achieved.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: August 5, 1997
    Assignee: Hitachi, Ltd.
    Inventors: Akihiro Tamba, Masahiro Iwamura, Yutaka Kobayashi, Kinya Mitsumoto, Tatsumi Yamauchi, Shuko Yamauchi, Takashi Akioka