Patents by Inventor Ronglin Liou

Ronglin Liou 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).

  • Protection circuit for traveling wave tubes having multiple input tones
    Patent number: 6324041
    Abstract: A protection circuit (30) for a Traveling Wave Tube having multiple tone operation. The protection circuit (30) is a dual sensor (52, 54) arrangement. One sensor (52) is an operational amplifier circuit (56) having a short time constant and a high threshold current. The first sensor (52) provides protection against short time scale faults. The second sensor (54) is an operational amplifier circuit (58) having a time constant higher than the first sensor (52) and a lower current threshold than the first sensor (52) to provide protection against long time scale events. The two sensors (52 and 54) are logically “OR”ed with each other and eliminate spurious shutdowns and circuit damage.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: November 27, 2001
    Assignee: Hughes Electronics Corporation
    Inventors: Dan M. Goebel, David E. Lewis, Ronglin Liou