Patents by Inventor Ki Chon Han

Ki Chon 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).

  • Doherty amplifier and signal amplification system having the same, method for amplifying signal
    Patent number: 7936213
    Abstract: A Doherty amplifier is provided. The Doherty amplifier includes a first path circuit including a carrier amplifier and a first impedance adjusting circuit connected with the carrier amplifier; and a second path circuit including a peaking amplifier, a second impedance adjusting circuit connected with the peaking amplifier, and a peaking amplifier bias circuit connected with the peaking amplifier. At least one among an impedance of the first impedance adjusting circuit, an impedance of the second impedance adjusting circuit, and a bias of the peaking amplifier bias circuit is adjusted in response to a control signal.
    Type: Grant
    Filed: August 24, 2009
    Date of Patent: May 3, 2011
    Assignee: Xronet Corporation
    Inventors: Jin Ho Shin, Ki Chon Han
  • DOHERTY AMPLIFIER AND SIGNAL AMPLIFICATION SYSTEM HAVING THE SAME, METHOD FOR AMPLIFYING SIGNAL
    Publication number: 20100052779
    Abstract: A Doherty amplifier is provided. The Doherty amplifier includes a first path circuit including a carrier amplifier and a first impedance adjusting circuit connected with the carrier amplifier; and a second path circuit including a peaking amplifier, a second impedance adjusting circuit connected with the peaking amplifier, and a peaking amplifier bias circuit connected with the peaking amplifier. At least one among an impedance of the first impedance adjusting circuit, an impedance of the second impedance adjusting circuit, and a bias of the peaking amplifier bias circuit is adjusted in response to a control signal.
    Type: Application
    Filed: August 24, 2009
    Publication date: March 4, 2010
    Applicant: XRONET CORPORATION
    Inventors: Jin Ho SHIN, Ki Chon HAN