Patents by Inventor Haijun “Halley” Chen

Haijun “Halley” Chen 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).

  • Differential load driver circuits
    Patent number: 7504746
    Abstract: A differential driving circuit is provided that reduces ripple current. The differential driving circuit is operable to supply a linear current in a low current mode and a PWM current in a high current mode. Depending on the direction of current flow through the load, heating and cooling is provided for loads such as a thermal electric cooler.
    Type: Grant
    Filed: July 22, 2003
    Date of Patent: March 17, 2009
    Assignee: 02Micro International Limited
    Inventors: Foot Shen Wong, Haijun “Halley” Chen, Mingpan Li