Patents by Inventor Rieko Ishida

Rieko Ishida 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: 5521536
    Abstract: In signal transmission lines among logic circuits employed in a semiconductor integrated circuit device, a voltage driver circuit is provided with such a wiring whose length is short, and the function of the signal receiving circuit is achieved by a logic circuit capable of responding to a voltage appearing at a terminal of the wiring. On the other hand, a source terminal of such a wiring whose length is long and whose resistance is high, is voltage-driven by the voltage driver circuit in response to the output voltage of the logic circuit. A current sense circuit is provided with a terminal of this long length wiring, which senses a current flowing through this long length wiring to be converted into a voltage. Both an output resistance of the voltage driver circuit and an input resistance of the current sense circuit are made lower than a DC resistance of this long length wiring.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: May 28, 1996
    Assignee: Hitachi, Ltd.
    Inventors: Hiroki Yamashita, Hiroyuki Itoh, Atsumi Kawata, Tatsuya Saitoh, Keiichirou Nakanishi, Rieko Ishida, Tsuneyo Chiba