Patents by Inventor Noaki Sudo

Noaki Sudo 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).

  • Booster circuit
    Patent number: 6008690
    Abstract: The present invention relates to a booster circuit which uses multiple pump circuits to provide high voltages. The pump circuits are provided with an input voltage Vcc and are generally each made up of a diode and a capacitor. A node driving circuit provides driving signals to driving nodes and thereby to the pump circuits. The driving nodes are connected by a charge transfer switch which is selectively activated so as to allow charge that would otherwise be lost to ground to be conserved for inclusion in the final high-output voltage.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: December 28, 1999
    Assignee: NEC Corporation
    Inventors: Toshio Takeshima, Masayoshi Ohkawa, Hiroshi Sugawara, Noaki Sudo