Patents by Inventor Hidetoshi Tojima

Hidetoshi Tojima 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).

  • Three-phase pulse width modulation waveform generator
    Patent number: 6448827
    Abstract: The present invention provides a three-phase pulse width modulation waveform generator having at least an up-down counting circuitry which comprises: an up-down counter for performing an up-count or a down-count upon an external input of a count clock signal; and a count controller having an output side connected to an input side of the up-down counter for sending the input side of the up-down counter a count enable signal which enables the up-down counter to perform the up-count or the down-count.
    Type: Grant
    Filed: November 27, 2000
    Date of Patent: September 10, 2002
    Assignee: NEC Corporation
    Inventor: Hidetoshi Tojima