Patents by Inventor Youngho Cho

Youngho Cho 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).

  • Publication number: 20130257558
    Abstract: Disclosed is a tunable capacitor. The tunable capacitor according to a first embodiment of the present invention includes: a variable capacitor unit placed between a first terminal and a second terminal; and a bypass switch which on/off controls a bypass connection between the first terminal and the second terminal, wherein the variable capacitor unit and the bypass switch are integrated on one semiconductor die or on one module. The tunable capacitor according to a second embodiment of the present invention includes: a variable capacitor unit placed between a first terminal and a second terminal; an impedance tuner placed between aground terminal and either the first terminal or the second terminal; and a tuning switch which on/off controls the connection between the variable capacitor unit and an impedance tuner, wherein the variable capacitor unit, the impedance tuner and the tuning switch are integrated on one semiconductor die or on one module.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 3, 2013
    Applicant: HiDeep Inc
    Inventors: Bonkee KIM, Youngho CHO, Donggu IM, Bumkyum KIM
  • Publication number: 20130258535
    Abstract: Disclosed is a tunable capacitor which includes: a variable capacitor unit placed between a first terminal and a second terminal; and an ESD protection circuit which is inserted either between the first terminal and a ground terminal or between the second terminal and the ground terminal, or is inserted both between the first terminal and a ground terminal and between the second terminal and the ground terminal.
    Type: Application
    Filed: April 1, 2013
    Publication date: October 3, 2013
    Applicant: HiDeep Inc.
    Inventors: Bonkee KIM, Youngho CHO, Donggu IM, Bumkyum KIM
  • Publication number: 20130257526
    Abstract: Disclosed is a noise removing circuit including: a voltage booster which boosts an input signal; and a regulator which receives an output signal of the voltage booster and reduces the signal's voltage higher than a specific value to the signal's voltage having the specific value and then outputs the signal.
    Type: Application
    Filed: March 12, 2013
    Publication date: October 3, 2013
    Applicant: HiDeep Inc.
    Inventors: Seyeob KIM, Youngho CHO, Bonkee KIM
  • Publication number: 20120326734
    Abstract: Disclosed is a capacitance sensor including: a capacitance-voltage/current converter which converts a capacitance value of a sense capacitor into a voltage signal or a current signal by using an input signal; a multiplier which applies a weight to an output signal of the capacitance-voltage/current converter and outputs the weighted output signal; and an accumulator which accumulates continuously the output signal of the multiplier.
    Type: Application
    Filed: June 25, 2012
    Publication date: December 27, 2012
    Inventors: Youngho Cho, Bonkee Kim
  • Patent number: 7400192
    Abstract: A low noise amplifier (LNA), and more particularly, to a LNA capable of making gain variable is provided. The variable gain LNA comprises a selection unit comprising a first selection cell, a second selection cell, and a third selection cell for selectively transmitting an input signal to an amplification unit to select one of the first to third selection cells in accordance with the magnitude of the input signal and an amplification unit comprising a first amplification cell for amplifying a signal applied from the first selection cell to a first gain mode and outputting, a second amplification cell for amplifying a signal applied from the second selection cell to a second gain and outputting, and a third amplification cell for amplifying a signal applied from the third selection cell to a third gain mode and outputting.
    Type: Grant
    Filed: March 28, 2006
    Date of Patent: July 15, 2008
    Assignee: Integrant Technologies Inc.
    Inventors: Youngho Cho, Bonkee Kim, Seong-Ho Park
  • Publication number: 20060220736
    Abstract: A low noise amplifier (LNA), and more particularly, to a LNA capable of making gain variable is provided. The variable gain LNA comprises a selection unit comprising a first selection cell, a second selection cell, and a third selection cell for selectively transmitting an input signal to an amplification unit to select one of the first to third selection cells in accordance with the magnitude of the input signal and an amplification unit comprising a first amplification cell for amplifying a signal applied from the first selection cell to a first gain mode and outputting, a second amplification cell for amplifying a signal applied from the second selection cell to a second gain and outputting, and a third amplification cell for amplifying a signal applied from the third selection cell to a third gain mode and outputting.
    Type: Application
    Filed: March 28, 2006
    Publication date: October 5, 2006
    Inventors: Youngho Cho, Bonkee Kim, Seong-Ho Park
  • Patent number: 6882226
    Abstract: A broadband variable gain amplifier with improved linearity and gain characteristic is provided. According to the present invention, the broadband variable gain amplifier comprises: an amplification unit for amplifying an input signal applied to an input terminal and outputting an amplified signal to an output terminal; and a gain control unit which is connected between the input and output terminals, and for controlling gain of said amplification unit, wherein said gain control unit comprises: a variable resistance unit whose resistance value is varied according to a control signal; and a broadband matching unit for proving an optimal impedance characteristic to the input terminal said amplification unit in a broad band, where in said variable gain resistance unit and said broadband matching unit is connected in parallel.
    Type: Grant
    Filed: May 15, 2003
    Date of Patent: April 19, 2005
    Assignee: Integrant Technologies Inc.
    Inventors: Youngho Cho, Bo-Eun Kim, Bonkee Kim
  • Publication number: 20030214357
    Abstract: A broadband variable gain amplifier with improved linearity and gain characteristic is provided. According to the present invention, the broadband variable gain amplifier comprises: an amplification unit for amplifying an input signal applied to an input terminal and outputting an amplified signal to an output terminal; and a gain control unit which is connected between the input and output terminals, and for controlling gain of said amplification unit, wherein said gain control unit comprises: a variable resistance unit whose resistance value is varied according to a control signal; and a broadband matching unit for proving an optimal impedance characteristic to the input terminal said amplification unit in a broad band, where in said variable gain resistance unit and said broadband matching unit is connected in parallel.
    Type: Application
    Filed: May 15, 2003
    Publication date: November 20, 2003
    Applicant: INTEGRANT TECHNOLOGIES INC.
    Inventors: Youngho Cho, Bo-Eun Kim, Bonkee Kim
  • Patent number: 6508935
    Abstract: Described in the present invention are a method for determining the pore size distribution of a membrane filter based on the molecular mass distribution curve of the rejected solute fraction of a feed solution when the feed is passed through the membrane, and an apparatus suitable for practicing said method.
    Type: Grant
    Filed: May 22, 2001
    Date of Patent: January 21, 2003
    Assignee: Kwangju Institute of Science & Technology
    Inventors: Jaeweon Cho, Sangyoup Lee, Youngho Cho
  • Publication number: 20020060187
    Abstract: Described in the present invention are a method for determining the pore size distribution of a membrane filter based on the molecular mass distribution curve of the rejected solute fraction of a feed solution when the feed is passed through the membrane, and an apparatus suitable for practicing said method.
    Type: Application
    Filed: May 22, 2001
    Publication date: May 23, 2002
    Inventors: Jaeweon Cho, Sangyoup Lee, Youngho Cho