Patents by Inventor David M. Okada

David M. Okada 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).

  • Off-line bootstrap startup circuit
    Patent number: 5477175
    Abstract: A novel off-line bootstrap startup circuit (10) including a high voltage device (100) for providing an initial bias voltage to an integrated circuit (IC) is provided. The high voltage device includes an NMOS transistor (102) having a high source to ground breakdown voltage thereby extending a bias voltage range provided to the IC. This bias voltage range may be needed to support large comparator (303) hysteresis and allow for an unregulated bias voltage. The bootstrap startup circuit becomes inoperative when the bias voltage exceeds a predetermined value.
    Type: Grant
    Filed: October 25, 1993
    Date of Patent: December 19, 1995
    Assignee: Motorola
    Inventors: Eric W. Tisinger, David M. Okada