Patents by Inventor Cha Kwang Kim

Cha Kwang Kim 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).

  • Apparatus and method for generating ramp waveform
    Patent number: 8390345
    Abstract: A ramp waveform generating apparatus generates a reference waveform by using an input signal and generates a driving control signal for turning on and off a switch having a first terminal connected to a load and a second terminal connected to a power supply by comparing the voltage of the reference waveform with the voltage of the load. While the switch is repetitively turned on and off in accordance with the driving control signal, a ramp waveform may be generated.
    Type: Grant
    Filed: March 16, 2011
    Date of Patent: March 5, 2013
    Assignee: Fairchild Korea Semiconductor Ltd.
    Inventors: Sung Nam Kim, Cha Kwang Kim, Young Sik Lee
  • APPARATUS AND METHOD FOR GENERATING RAMP WAVEFORM
    Publication number: 20110291709
    Abstract: A ramp waveform generating apparatus generates a reference waveform by using an input signal and generates a driving control signal for turning on and off a switch having a first terminal connected to a load and a second terminal connected to a power supply by comparing the voltage of the reference waveform with the voltage of the load. While the switch is repetitively turned on and off in accordance with the driving control signal, a ramp waveform may be generated.
    Type: Application
    Filed: March 16, 2011
    Publication date: December 1, 2011
    Inventors: Sung Nam KIM, Cha Kwang KIM, Young Sik LEE