Patents by Inventor Youngcheol Chae

Youngcheol Chae 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).

  • Patent number: 11813455
    Abstract: Provided herein is a stimulating device being equipped with an electrode element recording and stimulating nerve signals for diagnosis and treatment of chronic pain or Alzheimer's disease and, most particularly, to a stimulating device providing electrical stimulation for chronic pain or Alzheimer's-causing proteins or measuring bio signals. The stimulating device includes a controller, a substrate being coupled to a bottom of the controller, and having a power receiving and signal delivering electrode being mounted thereon as a single body or being distinctively mounted thereon, wherein the power receiving and signal delivering electrode is capable of wirelessly receiving power and wirelessly delivering bio signals, and an electrode element being coupled to a bottom of the substrate and being capable of delivering electrical stimulation to tissues inside a body.
    Type: Grant
    Filed: December 16, 2020
    Date of Patent: November 14, 2023
    Assignees: Yonsei University Industry Foundation, Nformare Inc.
    Inventors: Heon Jin Choi, Jae Suk Sung, Youngcheol Chae
  • Publication number: 20230216516
    Abstract: An apparatus configured to convert an analog input signal into a digital output signal may include a first amplification circuit configured to receive the analog input signal and a plurality of reference voltages and amplify differences between the analog input signal and the plurality of reference voltages; a plurality of first capacitors configured to respectively store charges corresponding to signals outputted by the first amplification circuit; a second amplification circuit configured to amplify differences among voltages of the plurality of first capacitors; a plurality of second capacitors configured to respectively store charges corresponding to signals outputted by the second amplification circuit; and a comparison circuit configured to generate the digital output signal by comparing voltages of the plurality of second capacitors with each other.
    Type: Application
    Filed: December 30, 2022
    Publication date: July 6, 2023
    Applicant: Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Daesik Moon, Youngcheol Chae
  • Patent number: 11499874
    Abstract: A temperature sensor configured to generate an output signal corresponding to a sensed and/or measured temperature includes: a diode including a cathode coupled to a ground node; a first capacitor including a first end coupled to the ground node; a switch circuit configured to connect a second end of the first capacitor to a positive voltage node or an anode of the diode according to a control signal; switch control circuitry configured to generate the control signal based on a reference voltage with a voltage of the anode; and an output signal generator configured to generate the output signal corresponding to the sensed temperature based on a frequency of the control signal.
    Type: Grant
    Filed: April 30, 2020
    Date of Patent: November 15, 2022
    Assignees: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Sungsik Park, Youngcheol Chae
  • Patent number: 11489494
    Abstract: A dynamic amplifier includes an amplifier configured to differentially amplify first and second input signals to generate first and second output signals, a bias circuit, and a variable impedance circuit. The bias circuit is connected between a first power node configured to supply a first source voltage and the amplifier, and configured to apply bias to the amplifier. The variable impedance circuit is connected between the amplifier and a second power node configured to supply a second source voltage that is lower than the first source voltage. The variable impedance circuit is configured to adjust amplification gain of the amplifier, by adjusting impedance based on a magnitude of one among the first and second input signals and the first and second output signals.
    Type: Grant
    Filed: April 2, 2020
    Date of Patent: November 1, 2022
    Assignees: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Yunhong Kim, Youngcheol Chae
  • Publication number: 20220187277
    Abstract: Provided herein is a device for measuring heavy metals having an electrode element and, most particularly, a device for measuring heavy metals having an electrode element including a device for measuring heavy metals having an electrode element including a substrate having a wireless communication electrode for wirelessly delivering an electrical variance that is measured from an electrode, when measuring heavy metals, an electrode element delivering an electrical signal for measuring heavy metals, and a controller controlling electric current application to the electrode element and detecting a quantity of electricity between electrodes being measured from a measurement object contaminated by heavy metal, or calculating a displacement between a reference quantity of electricity and a measured quantity of electricity.
    Type: Application
    Filed: December 16, 2020
    Publication date: June 16, 2022
    Applicants: Yonsei University Industry Foundation, Nformare Inc.
    Inventors: Heon Jin CHOI, Jae Suk SUNG, Youngcheol CHAE
  • Publication number: 20220184398
    Abstract: Provided herein is a stimulating device being equipped with an electrode element recording and stimulating nerve signals for diagnosis and treatment of chronic pain or Alzheimer's disease and, most particularly, to a stimulating device providing electrical stimulation for chronic pain or Alzheimer's-causing proteins or measuring bio signals. The stimulating device includes a controller, a substrate being coupled to a bottom of the controller, and having a power receiving and signal delivering electrode being mounted thereon as a single body or being distinctively mounted thereon, wherein the power receiving and signal delivering electrode is capable of wirelessly receiving power and wirelessly delivering bio signals, and an electrode element being coupled to a bottom of the substrate and being capable of delivering electrical stimulation to tissues inside a body.
    Type: Application
    Filed: December 16, 2020
    Publication date: June 16, 2022
    Applicants: Yonsei University Industry Foundation, Nformare Inc.
    Inventors: Heon Jin CHOI, Jae Suk SUNG, Youngcheol CHAE
  • Patent number: 11140346
    Abstract: An analog-to-digital converter configured to convert an analog signal into a digital signal includes a first converter configured to receive an input signal of an analog type, compare the input signal with a plurality of reference signals, select one of the plurality of reference signals based on the comparison, and output an upper bit that is a portion of the digital signal based on the selected reference signal, a second converter configured to perform an oversampling operation n times based on a residue signal indicating a difference between an upper analog signal corresponding to the upper bit value and the input signal and output an intermediate bit value of the digital signal corresponding to the first to n-th oversampling signals generated respectively during the oversampling operations performed n times, and a third converter configured to output a lower bit value of the digital signal corresponding to the n-th oversampling signal.
    Type: Grant
    Filed: September 28, 2017
    Date of Patent: October 5, 2021
    Assignees: Samsung Electronics Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Youngcheol Chae, Sang-hyun Cho, Min-ho Kwon, Seung-hyun Lim, Woo-jin Jo
  • Publication number: 20210204855
    Abstract: The present invention provides a biosignal measuring and stimulating device having bioelectrodes in which a signal measurement unit (200) including bioelectrodes composed of a plurality of microelectrodes (210) is disposed on a substrate (100), wherein the signal measurement unit (200), a measured signal processing unit (300), and at least one of a driving power unit (400) and a wireless communication unit (500) are disposed on the substrate (100) in a vertical or lateral direction, and the biosignal measuring and stimulating device measures biosignals or stimulates from the microelectrodes formed in an array pattern.
    Type: Application
    Filed: September 2, 2019
    Publication date: July 8, 2021
    Inventors: Heon-Jin CHOI, Youngcheol CHAE, Jae-Suk SUNG, Ju Kwan NA
  • Patent number: 11002612
    Abstract: A temperature sensor using a poly-phase filter may include: a poly-phase filter suitable for receiving a divided clock, and having passive elements coupled to have one or more negative poles and one or more positive zeros; a comparator suitable for generating a reference clock by comparing potentials of first and second filter voltages outputted from the poly-phase filter; a phase frequency detector suitable for outputting an up or down signal by comparing the phase of the reference clock to the phase of a comparison clock; a current supply unit suitable for supplying and integrating a charge current under control of the up or the down signal; an oscillator suitable for outputting an oscillation signal; a divider suitable for generating the divided clock and the comparison clock; and a buffer suitable for inverting and non-inverting the divided clock and outputting the inverted and non-inverted divided clocks.
    Type: Grant
    Filed: February 11, 2019
    Date of Patent: May 11, 2021
    Assignees: SK hynix Inc., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Woojun Choi, Yongtae Lee, Youngcheol Chae
  • Publication number: 20210063250
    Abstract: A temperature sensor configured to generate an output signal corresponding to a sensed and/or measured temperature includes: a diode including a cathode coupled to a ground node; a first capacitor including a first end coupled to the ground node; a switch circuit configured to connect a second end of the first capacitor to a positive voltage node or an anode of the diode according to a control signal; switch control circuitry configured to generate the control signal based on a reference voltage with a voltage of the anode; and an output signal generator configured to generate the output signal corresponding to the sensed temperature based on a frequency of the control signal.
    Type: Application
    Filed: April 30, 2020
    Publication date: March 4, 2021
    Applicants: Samsung Electronics Co., Ltd., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Sungsik PARK, Youngcheol CHAE
  • Publication number: 20200395896
    Abstract: A dynamic amplifier includes an amplifier configured to differentially amplify first and second input signals to generate first and second output signals, a bias circuit, and a variable impedance circuit. The bias circuit is connected between a first power node configured to supply a first source voltage and the amplifier, and configured to apply bias to the amplifier. The variable impedance circuit is connected between the amplifier and a second power node configured to supply a second source voltage that is lower than the first source voltage. The variable impedance circuit is configured to adjust amplification gain of the amplifier, by adjusting impedance based on a magnitude of one among the first and second input signals and the first and second output signals.
    Type: Application
    Filed: April 2, 2020
    Publication date: December 17, 2020
    Applicant: INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Yunhong Kim, Youngcheol Chae
  • Publication number: 20200191660
    Abstract: A temperature sensor using a poly-phase filter may include: a poly-phase filter suitable for receiving a divided clock, and having passive elements coupled to have one or more negative poles and one or more positive zeros; a comparator suitable for generating a reference clock by comparing potentials of first and second filter voltages outputted from the poly-phase filter; a phase frequency detector suitable for outputting an up or down signal by comparing the phase of the reference clock to the phase of a comparison clock; a current supply unit suitable for supplying and integrating a charge current under control of the up or the down signal; an oscillator suitable for outputting an oscillation signal; a divider suitable for generating the divided clock and the comparison clock; and a buffer suitable for inverting and non-inverting the divided clock and outputting the inverted and non-inverted divided clocks.
    Type: Application
    Filed: February 11, 2019
    Publication date: June 18, 2020
    Inventors: Woojun CHOI, Yongtae LEE, Youngcheol CHAE
  • Patent number: 10044526
    Abstract: A transmitter may include a first transmission driver configured to drive a first transmission line according to a first input signal, a second transmission driver configured to drive a second transmission line according to a second input signal, a third transmission driver configured to drive a third transmission line according to a third input signal. The transmitter may further include a first active inductor circuit coupled to an output terminal of the first transmission driver, a second active inductor circuit coupled to an output terminal of the second transmission driver, and a third active inductor circuit coupled to an output terminal of the third transmission driver.
    Type: Grant
    Filed: June 12, 2017
    Date of Patent: August 7, 2018
    Assignees: SK HYNIX INC., INDUSTRY-ACADEMIC COOPERATION FOUNDATION YONSEI UNIVERSITY
    Inventors: Taewoong Kim, Woojun Choi, Youngcheol Chae, Gunhee Han, Haekang Jung, Jongjoo Shim
  • Publication number: 20180109747
    Abstract: An analog-to-digital converter configured to convert an analog signal into a digital signal includes a first converter configured to receive an input signal of an analog type, compare the input signal with a plurality of reference signals, select one of the plurality of reference signals based on the comparison, and output an upper bit that is a portion of the digital signal based on the selected reference signal, a second converter configured to perform an oversampling operation n times based on a residue signal indicating a difference between an upper analog signal corresponding to the upper bit value and the input signal and output an intermediate bit value of the digital signal corresponding to the first to n-th oversampling signals generated respectively during the oversampling operations performed n times, and a third converter configured to output a lower bit value of the digital signal corresponding to the n-th oversampling signal.
    Type: Application
    Filed: September 28, 2017
    Publication date: April 19, 2018
    Inventors: Youngcheol Chae, Sang-hyun Cho, Min-ho Kwon, Seung-hyun Lim, Woo-jin Jo
  • Publication number: 20180102921
    Abstract: A transmitter may include a first transmission driver configured to drive a first transmission line according to a first input signal, a second transmission driver configured to drive a second transmission line according to a second input signal, a third transmission driver configured to drive a third transmission line according to a third input signal. The transmitter may further include a first active inductor circuit coupled to an output terminal of the first transmission driver, a second active inductor circuit coupled to an output terminal of the second transmission driver, and a third active inductor circuit coupled to an output terminal of the third transmission driver.
    Type: Application
    Filed: June 12, 2017
    Publication date: April 12, 2018
    Inventors: Taewoong KIM, Woojun Choi, Youngcheol Chae, Gunhee Han, Haekang Jung, Jongjoo Shim
  • Patent number: 9774347
    Abstract: An image sensor includes a pixel array, a controller, and a plurality of analog-to-digital converters. The pixel array includes a plurality of pixels coupled to column lines, respectively, and the plurality of pixels are configured to sense incident lights to generate analog signals through the column lines. The controller generate a conversion control signal that is configurable based on changes of at least one operational condition. The plurality of analog-to-digital converters are coupled to the column lines, respectively. The plurality of analog-to-digital converters perform a delta-sigma modulation and a digital filtering to convert the analog signals to digital signals. The plurality of analog-to-digital converters adjust a conversion gain internally in response to the conversion control signal.
    Type: Grant
    Filed: December 29, 2014
    Date of Patent: September 26, 2017
    Assignees: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Youngcheol Chae, Jae-Hong Kim, Seungwoo Song, Woojin Jo, Hyunseok Hwang
  • Patent number: 9473166
    Abstract: An analog-to-digital converter includes a modulator, a controller, and a digital filter. The modulator generates a modulated signal based on an analog signal. The controller generates a weight control signal. The digital filter includes a weight signal generator and a first integrator. The weight signal generator generates a weight signal based on the weight control signal. The first integrator generates a digital signal corresponding to the analog signal by integrating the weight signal in response to the modulated signal. The weight control signal corresponds to a type and an order of the digital filter.
    Type: Grant
    Filed: April 22, 2015
    Date of Patent: October 18, 2016
    Assignees: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Jae-Hong Kim, Youngcheol Chae, Seungwoo Song, Woojin Jo, Hyunseok Hwang
  • Publication number: 20150311912
    Abstract: An analog-to-digital converter includes a modulator, a controller, and a digital filter. The modulator generates a modulated signal based on an analog signal. The controller generates a weight control signal. The digital filter includes a weight signal generator and a first integrator. The weight signal generator generates a weight signal based on the weight control signal. The first integrator generates a digital signal corresponding to the analog signal by integrating the weight signal in response to the modulated signal. The weight control signal corresponds to a type and an order of the digital filter.
    Type: Application
    Filed: April 22, 2015
    Publication date: October 29, 2015
    Inventors: Jae-Hong Kim, Youngcheol Chae, Seungwoo Song, Woojin Jo, Hyunseok Hwang
  • Publication number: 20150311914
    Abstract: An image sensor includes a pixel array, a controller, and a plurality of analog-to-digital converters. The pixel array includes a plurality of pixels coupled to column lines, respectively, and the plurality of pixels are configured to sense incident lights to generate analog signals through the column lines. The controller generate a conversion control signal that is configurable based on changes of at least one operational condition. The plurality of analog-to-digital converters are coupled to the column lines, respectively. The plurality of analog-to-digital converters perform a delta-sigma modulation and a digital filtering to convert the analog signals to digital signals. The plurality of analog-to-digital converters adjust a conversion gain internally in response to the conversion control signal.
    Type: Application
    Filed: December 29, 2014
    Publication date: October 29, 2015
    Applicants: SAMSUNG ELECTRONICS CO., LTD., INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY
    Inventors: Youngcheol CHAE, Jae-Hong KIM, Seungwoo SONG, Woojin JO, Hyunseok HWANG
  • Patent number: 8723597
    Abstract: According to the present invention, a switched capacitor circuit comprises: an inverting amplifier for removing the offset by using a chopper stabilization circuit; a sampling unit which is connected between an input terminal and the inverting amplifier; and a feedback unit which is connected to the inverting amplifier in parallel.
    Type: Grant
    Filed: July 12, 2010
    Date of Patent: May 13, 2014
    Assignee: Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Gunhee Han, Youngcheol Chae, Inhee Lee, Dongmyung Lee, Seunghyun Lim, Ji Min Cheon