Patents by Inventor Choong Soo Han

Choong Soo Han 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).

  • High-efficiency power amplifier with multiple power modes
    Patent number: 8836431
    Abstract: In a representative embodiment, a multiple mode power amplifier that is operable in a first power mode and a second power mode. The multiple mode power amplifier comprises a first amplifying unit; a second amplifying unit; a first impedance matching network connected to an output port of the first amplifying unit; a second impedance matching network connected to an output port of the second amplifying unit and to the first impedance matching network; and a third impedance matching network connected to the output ports of the first and the second amplifying units. The third impedance matching network reduces a phase difference between signals amplified by the first and the second amplifying units in the first mode.
    Type: Grant
    Filed: November 23, 2010
    Date of Patent: September 16, 2014
    Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
    Inventors: Choong Soo Han, Jung Min Oh, Sang Hwa Jung
  • HIGH-EFFICIENCY POWER AMPLIFIER WITH MULTIPLE POWER MODES
    Publication number: 20120126887
    Abstract: In a representative embodiment, a multiple mode power amplifier that is operable in a first power mode and a second power mode. The multiple mode power amplifier comprises a first amplifying unit; a second amplifying unit; a first impedance matching network connected to an output port of the first amplifying unit; a second impedance matching network connected to an output port of the second amplifying unit and to the first impedance matching network; and a third impedance matching network connected to the output ports of the first and the second amplifying units. The third impedance matching network reduces a phase difference between signals amplified by the first and the second amplifying units in the first mode.
    Type: Application
    Filed: November 23, 2010
    Publication date: May 24, 2012
    Applicant: Avago Technologies Wireless IP (Singapore) Pte. Ltd.
    Inventors: Choong Soo Han, Jung Min Oh, Sang Hwa Jung