Patents by Inventor Richard Thao Ha

Richard Thao Ha 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).

  • Methods and apparatus for an improved amplifier for driving a dynamic load
    Patent number: 7342363
    Abstract: Methods and apparatus are provided for an amplifier for use with a nonlinear load. In one embodiment, a method is provided for driving a flash lamp. The method comprises providing an amplifier having a resonant reset topology, coupling an output of the amplifier to the flash lamp to provide a pulsed power output to the flash lamp, and driving the amplifier with a controller to provide a pulse width modulation output to the flash lamp. The pulsed output from the amplifier has a period selected to prevent a streamer of said flash lamp from extinguishing during an active use.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: March 11, 2008
    Assignee: Continuum Electro•Optics, Inc.
    Inventors: Timothy D. Logsdon, Richard Thao Ha
  • Methods and apparatus for an improved amplifier for driving a non-linear load
    Patent number: 7276857
    Abstract: Methods and apparatus are provided for an amplifier for use with a nonlinear load. In one embodiment, a method is provided for driving a flash lamp. The method comprises providing an amplifier having a resonant reset topology, coupling an output of the amplifier to the flash lamp to provide a pulsed power output to the flash lamp, and driving the amplifier with a controller to provide a pulse width modulation output to the flash lamp. The pulsed output from the amplifier has a period selected to prevent a streamer of said flash lamp from extinguishing during an active use.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: October 2, 2007
    Assignee: Continuum Electro-Optics, Inc.
    Inventors: Timothy D. Logsdon, Richard Thao Ha