Patents by Inventor So W. Hung

So W. Hung 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).

  • Patent number: 5532917
    Abstract: A power factor corrected rectifying circuit is disclosed. The invention may be implemented using only passive elements and, in such an embodiment, achieves a power factor of about 80%. The invention comprises two rectifying circuits for providing two rectified current paths from an AC input port to an output port. The coupling of current along one of the rectified current paths is delayed. As the sum of the delayed and undelayed currents, the input current pulse is widened to approximate a sinusoid, thereby increasing the power factor.
    Type: Grant
    Filed: August 5, 1994
    Date of Patent: July 2, 1996
    Assignee: Astec International, Ltd.
    Inventor: So W. Hung