Patents by Inventor Sukehiro Yoshida

Sukehiro Yoshida 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 separate supply voltages for the logic stage and output stage
    Patent number: 5274280
    Abstract: A semiconductor integrated circuit device has a plurality of emitter-coupled logic (ECL) gates. Separate power source wiring lines are provided for current switch circuits and emitter follower output circuits for the gates. The separate sets of power source wiring lines are respectively coupled to the corresponding external terminals of the semiconductor integrated circuit device. The power source wiring lines for each set are arranged adjacent one another on a semiconductor chip in order that they may be short circuited or kept separated depending upon the package structure of the semiconductor integrated circuit device.
    Type: Grant
    Filed: September 13, 1991
    Date of Patent: December 28, 1993
    Assignees: Hitachi, Ltd., Hitachi Computer Engineering Co., Ltd.
    Inventors: Yuko Ito, Toshio Yamada, Atsushi Shimizu, Kazuo Tanaka, Sukehiro Yoshida