Patents by Inventor Norikuni Higashi

Norikuni Higashi 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).

  • TTL Input current reduction circuit
    Patent number: 4445052
    Abstract: A multi-input logic circuit comprises a multi-emitter transistor having emitters which are connected to a logic input terminals of the multi-input logic circuit, a PNP type transistor having a base which is connected to a collector of said multi-emitter transistor and a level shift element which is connected to an emitter of the PNP type transistor. This arrangement facilitates the maintenance of an improved margin of threshold voltage to input voltage.
    Type: Grant
    Filed: September 5, 1980
    Date of Patent: April 24, 1984
    Assignee: Fujitsu Limited
    Inventor: Norikuni Higashi