Patents by Inventor Kohji Fukumoto

Kohji Fukumoto 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).

  • High frequency integrated circuit device including a circuit for decreasing reflected signals in wiring formed on a semiconductor substrate
    Patent number: 5341039
    Abstract: A semiconductor integrated circuit device operated under a clock signal having a high frequency exceeding 100 MHz is disclosed. In a wiring path, impedance of wiring is changed discontinuously due to a contact hole or decrease in wiring width and the like to cause mismatching. In order to make matching in such a mismatching portion, matching resistance having a value twice as large as characteristic impedance of wiring is provided. Reflection of transmitted signals at discontinuous portions of impedance can be prevented because of the matching resistance. Therefore, malfunction in a CMOS circuit of destination is prevented.
    Type: Grant
    Filed: March 26, 1992
    Date of Patent: August 23, 1994
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Kohji Fukumoto