Patents by Inventor Ho-jin Seo

Ho-jin Seo 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).

  • Synchronous buck DC/DC converter to perform an improved switching operation by adjusting variable resistor
    Patent number: 7365526
    Abstract: A synchronous buck DC/DC converter to perform an improved switching operation by adjusting a variable resistor is provided. The synchronous buck DC/DC converter includes a switching unit for switching two PWM signals inverted with a dead time and outputting the PWM signals, a smoothing circuit for outputting DC power using a waveform output from the switching unit as an input, a variable resistor connected to the switching unit and adjusting a switching time of the waveform output from the switching unit, and a variable resistor controller for sensing a current from an output terminal of the smoothing circuit and setting the resistance of the variable resistor to a resistance corresponding to the sensed current.
    Type: Grant
    Filed: November 29, 2005
    Date of Patent: April 29, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Jae-deok Cha, Ho-jin Seo
  • Synchronous buck DC/DC converter to perform an improved switching operation by adjusting variable resistor
    Publication number: 20060132113
    Abstract: A synchronous buck DC/DC converter to perform an improved switching operation by adjusting a variable resistor is provided. The synchronous buck DC/DC converter includes a switching unit for switching two PWM signals inverted with a dead time and outputting the PWM signals, a smoothing circuit for outputting DC power using a waveform output from the switching unit as an input, a variable resistor connected to the switching unit and adjusting a switching time of the waveform output from the switching unit, and a variable resistor controller for sensing a current from an output terminal of the smoothing circuit and setting the resistance of the variable resistor to a resistance corresponding to the sensed current.
    Type: Application
    Filed: November 29, 2005
    Publication date: June 22, 2006
    Inventors: Jae-deok Cha, Ho-Jin Seo
  • Synchronous buck DC/DC converter to perform an improved switching operation by adjusting variable resistor
    Patent number: RE44180
    Abstract: A synchronous buck DC/DC converter to perform an improved switching operation by adjusting a variable resistor is provided. The synchronous buck DC/DC converter includes a switching unit for switching two PWM signals inverted with a dead time and outputting the PWM signals, a smoothing circuit for outputting DC power using a waveform output from the switching unit as an input, a variable resistor connected to the switching unit and adjusting a switching time of the waveform output from the switching unit, and a variable resistor controller for sensing a current from an output terminal of the smoothing circuit and setting the resistance of the variable resistor to a resistance corresponding to the sensed current.
    Type: Grant
    Filed: April 29, 2010
    Date of Patent: April 30, 2013
    Assignee: SAMSUNG Electronics Co., Ltd.
    Inventors: Jae-deok Cha, Ho-jin Seo