Patents by Inventor Jong Ok HA

Jong Ok 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).

  • ENVELOPE TRACKING POWER AMPLIFYING APPARATUS AND METHOD
    Publication number: 20170264246
    Abstract: An apparatus includes a first predistorter configured to calculate a first predistortion parameter and configured to distort an input signal using the first predistortion parameter to output a first distortion signal, a second predistorter configured to calculate a second predistortion parameter and configured to distort the first distortion signal using the second predistortion parameter to output a second distortion signal, a power supply configured to receive the first distortion signal to generate a first envelope signal, and configured to limit a bandwidth of the first envelope signal to obtain a second envelope signal to supply a source voltage, and a power amplifier configured to receive the source voltage and to output an output signal obtained by amplifying the second distortion signal.
    Type: Application
    Filed: September 20, 2016
    Publication date: September 14, 2017
    Applicants: SAMSUNG ELECTRO-MECHANICS CO., LTD., Korea Advanced Institute of Science and Technology
    Inventors: Yong Hoon LEE, Eui Rim JEONG, Sang II LEE, Soon II HONG, Soon Chan PARK, Kwang Pyo LEE, Jong Ok HA
  • Power amplifier and method for limiting current in power amplifier
    Patent number: 9735745
    Abstract: A power amplifier apparatus includes: an amplifier configured to amplify an input signal; a sensing circuit connected to the amplifier and configured to sense a bias of the amplifier; and a biasing circuit connected to the sensing circuit and configured to provide a biasing current to the amplifier, wherein the sensing circuit is configured to change the biasing current based on the bias of the amplifier.
    Type: Grant
    Filed: March 16, 2016
    Date of Patent: August 15, 2017
    Assignee: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kwang Du Lee, Ho Kwon Yoon, Jong Ok Ha, Kyung Hee Hong, Shinichi Iizuka, Jae Hyouck Choi, Suk Chan Kang
  • POWER AMPLIFIER AND METHOD FOR LIMITING CURRENT IN POWER AMPLIFIER
    Publication number: 20160322940
    Abstract: A power amplifier apparatus includes: an amplifier configured to amplify an input signal; a sensing circuit connected to the amplifier and configured to sense a bias of the amplifier; and a biasing circuit connected to the sensing circuit and configured to provide a biasing current to the amplifier, wherein the sensing circuit is configured to change the biasing current based on the bias of the amplifier.
    Type: Application
    Filed: March 16, 2016
    Publication date: November 3, 2016
    Applicant: Samsung Electro-Mechanics Co., Ltd.
    Inventors: Kwang Du LEE, Ho Kwon YOON, Jong Ok HA, Kyung Hee HONG, Shinichi IIZUKA, Jae Hyouck CHOI, Suk Chan KANG