Patents by Inventor Lee Won Woo

Lee Won Woo 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).

  • Battery charger circuits using constant current/constant voltage mode using maintenance offset currents and methods of operating the same
    Patent number: 7612539
    Abstract: Battery charging circuits can change from charging a battery in a constant current mode using an amplifier circuit output to control a voltage controlled current source to provide substantially constant current to the battery to charging the battery in a constant voltage mode using the amplifier circuit output to control the voltage controlled current source to provide a varied current to the battery. Related methods are disclosed.
    Type: Grant
    Filed: June 2, 2004
    Date of Patent: November 3, 2009
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Lee Won Woo, Choi Jin Sub