Patents by Inventor Haruji Futami

Haruji Futami 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).

  • Input-output circuit of reduced device area for semicustom semiconductor integrated circuit
    Patent number: 5087955
    Abstract: A peripheral block of a semicustom integrated circuit comprises one input/output pad formed on a peripheral portion of a substrate and an N-channel MOS transistor formed in proximity of the input/output pad. A wiring conductor extends from the input/output pad to an internal circuit, and one the way, is connected to a drain region of the N-channel MOS transistor. A source and a gate of the N-channel MOS transistor is connected to a ground so as to function as a diode for protecting a large voltage inputted to the input/output pad, from the internal circuit.
    Type: Grant
    Filed: August 8, 1990
    Date of Patent: February 11, 1992
    Assignee: NEC Corporation
    Inventor: Haruji Futami