Patents by Inventor Chang-sik Yoo

Chang-sik Yoo 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: 20230353431
    Abstract: A low power PAM-4 output transmitter is disclosed. The lower power PAM-4 output transmitter comprises a first source series terminated SST branch configured to include unit cells having transistors which are selectively activated in response to an input signal outputted from an encoder; a second SST branch configured to include unit cells having transistors which are selectively activated in response to a negative signal of the input signal; and a common voltage switch H3 configured to short or open the first SST branch and the second SST branch. Here, differential signals are outputted from both terminals of the first SST branch and the second SST branch by making the first SST branch and the second SST branch short or open according to an operation of the common voltage switch.
    Type: Application
    Filed: June 30, 2023
    Publication date: November 2, 2023
    Inventors: CHang Sik YOO, Hyeong Min SEO, Ji Yun HAN
  • Publication number: 20230145230
    Abstract: A multiplexer includes a first inverter for receiving and inverting first data, a second inverter for receiving and inverting second data, and a first driver connected to an output of the first inverter and to an output of the second inverter. The first driver is configured to output the first data or the second data as output data.
    Type: Application
    Filed: July 13, 2022
    Publication date: May 11, 2023
    Inventors: Hyun Ah AN, Chang Sik YOO, Jin Kwan PARK, Sung Woo YOON
  • Patent number: 11502714
    Abstract: Disclosed are high-speed data transmitting/receiving system and method capable of removing simultaneous switching noise and ISI at low cost and a small area. A transmitter used in the data transmitting/receiving system includes: a data mapping unit which maps 2-bit input data to one of codes, wherein the voltage level of a first signal line, the voltage level of a second signal line, and the voltage level of a third signal line are set in each of the codes; and a transmit driver which outputs data corresponding to the input data through the first signal line, the second signal line, and the third signal line having the voltage levels corresponding to the mapped code. Here, each of the voltage levels is ‘+1’, ‘0’ or ‘?1’, and the number of signal lines having the voltage level of ‘+1’ is the same as the number of signal lines having the voltage level of ‘?1’.
    Type: Grant
    Filed: October 27, 2017
    Date of Patent: November 15, 2022
    Assignee: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventor: Chang Sik Yoo
  • Publication number: 20220221971
    Abstract: A method of adjusting the size, position, or arrangement of a UI and a user terminal using the method are disclosed. The user terminal includes a display unit for displaying a UI, and a UI control unit configured to display the UI on the display unit with at least one of a position, size, and arrangement of the UI adjusted according to an input by a user.
    Type: Application
    Filed: January 28, 2022
    Publication date: July 14, 2022
    Applicant: Arability IP LLC
    Inventor: Chang-Sik YOO
  • Patent number: 11262908
    Abstract: A method of adjusting the size, position, or arrangement of a UI and a user terminal using the method are disclosed. The user terminal includes a display unit for displaying a UI, and a UI control unit configured to display the UI on the display unit with at least one of a position, size, and arrangement of the UI adjusted according to an input by a user.
    Type: Grant
    Filed: May 6, 2019
    Date of Patent: March 1, 2022
    Inventor: Chang-Sik Yoo
  • Patent number: 10992412
    Abstract: Disclosed are a transmitter capable of cancelling simultaneous switching noise while ensuring low costs and a small area and a data transmission method in the same. The transmitter includes an encoder configured to convert input data of two levels (1 and 0) into data of three levels (+1, 0, and ?1) and an output unit configured to output the data converted by the encoder. Here, the encoder adds 1 bit to the input data such that the number of bits corresponding to logic 1 becomes an even number. In addition, a specific correlation is established between currents or voltages corresponding to at least two levels of levels “+1”, “0”, and “?1” so that “+1” and “?1” corresponding to the logic 1 are alternately arranged and a current flowing through a power line or a ground line is constant regardless of the input data.
    Type: Grant
    Filed: June 28, 2017
    Date of Patent: April 27, 2021
    Assignee: Industry-University Cooperation Foundation Hanyang University
    Inventor: Chang Sik Yoo
  • Patent number: 10924204
    Abstract: The signal transmission device converts a K-bit original signal into an N-bit (N is greater than K) transmission signal in which the number of a logic high bit is identical to the number of a logic low bit, according to a lookup table in which a plurality of K-bit original signals are associated with a plurality of N-bit transmission signals by 1:1 correspondence, and transmit the N-bit transmission signal via N signal lines such that each line carries one bit, thereby minimizing the noise affecting the K-bit original signal.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: February 16, 2021
    Assignee: Industry-University Cooperation Foundation Hanyang University
    Inventor: Chang Sik Yoo
  • Publication number: 20210028810
    Abstract: Disclosed are high-speed data transmitting/receiving system and method capable of removing simultaneous switching noise and ISI at low cost and a small area. A transmitter used in the data transmitting/receiving system includes: a data mapping unit which maps 2-bit input data to one of codes, wherein the voltage level of a first signal line, the voltage level of a second signal line, and the voltage level of a third signal line are set in each of the codes; and a transmit driver which outputs data corresponding to the input data through the first signal line, the second signal line, and the third signal line having the voltage levels corresponding to the mapped code. Here, each of the voltage levels is ‘+1’, ‘0’ or ‘?1’, and the number of signal lines having the voltage level of ‘+1’ is the same as the number of signal lines having the voltage level of ‘?1’.
    Type: Application
    Filed: October 27, 2017
    Publication date: January 28, 2021
    Applicant: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventor: Chang Sik YOO
  • Publication number: 20200228233
    Abstract: Disclosed are a transmitter capable of cancelling simultaneous switching noise while ensuring low costs and a small area and a data transmission method in the same. The transmitter includes an encoder configured to convert input data of two levels (1 and 0) into data of three levels (+1, 0, and ?1) and an output unit configured to output the data converted by the encoder. Here, the encoder adds 1 bit to the input data such that the number of bits corresponding to logic 1 becomes an even number. In addition, a specific correlation is established between currents or voltages corresponding to at least two levels of levels “+1”, “0”, and “?1” so that “+1” and “?1” corresponding to the logic 1 are alternately arranged and a current flowing through a power line or a ground line is constant regardless of the input data.
    Type: Application
    Filed: June 28, 2017
    Publication date: July 16, 2020
    Applicant: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventor: Chang Sik YOO
  • Patent number: 10656895
    Abstract: A system for linking and controlling terminals is disclosed. A user terminal includes an image unit configured to output image data corresponding to a first image to be shared with a receiving terminal viewed by a user of the user terminal, and a signal unit configured to transmit the image data outputted from the image unit and position information of a touch input touching the user terminal to the receiving terminal. Here, the position information is position information of the touch input touching the user terminal at a preset pressure level or lower or with a preset contact area or smaller, and is displayed on the receiving terminal in an image form.
    Type: Grant
    Filed: September 26, 2018
    Date of Patent: May 19, 2020
    Assignee: INDUSTRY—UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventor: Chang-sik Yoo
  • Publication number: 20190258379
    Abstract: A method of adjusting the size, position, or arrangement of a UI and a user terminal using the method are disclosed. The user terminal includes a display unit for displaying a UI, and a UI control unit configured to display the UI on the display unit with at least one of a position, size, and arrangement of the UI adjusted according to an input by a user.
    Type: Application
    Filed: May 6, 2019
    Publication date: August 22, 2019
    Inventor: Chang-Sik YOO
  • Patent number: 10382046
    Abstract: A digital phase locked loop realizing high bandwidth is disclosed. The digital locked loop generates a first digital code corresponding to a difference between a rising edge of a reference signal and a rising edge of a feedback signal and a second digital code corresponding to a difference between a falling edge of the reference signal and a falling edges of the feedback signal, generates a third digital code by adding the first digital code and the second digital code, generates a first frequency control code at the rising edge of the reference signal and a second frequency control code at the falling edge of the reference signal by filtering the third digital code, outputs a specific frequency depending on the first frequency control code and the second frequency control code.
    Type: Grant
    Filed: November 10, 2016
    Date of Patent: August 13, 2019
    Assignee: Industry-University Cooperation Foundation Hanyang University
    Inventor: Chang Sik Yoo
  • Publication number: 20190199471
    Abstract: A signal transmission device and method, and a signal reception device are disclosed.
    Type: Application
    Filed: November 10, 2016
    Publication date: June 27, 2019
    Applicant: Industry-University Cooperation Foundation Hanyang University
    Inventor: Chang Sik YOO
  • Patent number: 10331332
    Abstract: A method of adjusting the size, position, or arrangement of a UI and a user terminal using the method are disclosed. The user terminal includes a display unit for displaying a UI, and a UI control unit configured to display the UI on the display unit with at least one of a position, size, and arrangement of the UI adjusted according to an input by a user.
    Type: Grant
    Filed: May 19, 2017
    Date of Patent: June 25, 2019
    Assignee: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventor: Chang-Sik Yoo
  • Patent number: 10320400
    Abstract: Disclosed is a phase-locked loop having a high bandwidth using the rising edge and falling edge of a signal. The disclosed phase-locked loop controls the frequency of a voltage control oscillator by comparing both a phase difference between rising edge of a reference signal and rising edge of a feedback signal and a phase difference between falling edge of the reference signal and falling edge of the feedback signal.
    Type: Grant
    Filed: October 13, 2016
    Date of Patent: June 11, 2019
    Assignee: Industry-University Cooperation Foundation Hanyang University
    Inventors: Chang Sik Yoo, Baek Jin Lim
  • Publication number: 20190050702
    Abstract: Disclosed is a secure semiconductor chip. When a physical attack such as a depackaging attack occurs, the semiconductor chip can detect the physical attack. A semiconductor chip according to one embodiment comprises an energy harvesting element inside a package. The energy harvesting element may comprise, for example, an on-chip photodiode. A depackaging attack causes the generation of a voltage of a photodiode, and thus a change in physical state of the packaging can be detected.
    Type: Application
    Filed: February 10, 2017
    Publication date: February 14, 2019
    Inventors: Hyoung Ho KO, Chang-Sik YOO, Byong Deok CHOI
  • Patent number: 10205353
    Abstract: An apparatus and a method for charge control are provided. The apparatus for charge control may include an integrated direct current-to-direct current (DC/DC) converter configured to step up an output voltage level of a load to be greater than or equal to a supply voltage level set in a power amplifier, and the power amplifier configured to convert a direct current (DC) voltage stepped up by the integrated DC/DC converter into an alternating current (AC) voltage based on a resonant frequency, and to amplify the converted AC voltage. The apparatus for charge control may include a rectification unit configured to convert an AC power received wirelessly into a DC power; and a DC/DC converter configured to step down a voltage level of the DC power to a voltage level required by a load in the receiving mode.
    Type: Grant
    Filed: September 19, 2017
    Date of Patent: February 12, 2019
    Assignees: SAMSUNG ELECTRONICS CO., LTD., IUCF-HYU (INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY)
    Inventors: Dong Zo Kim, Sang Wook Kwon, Ki Young Kim, Nam Yun Kim, Young Jin Moon, Yun Kwon Park, Keum Su Song, Chi Hyung Ahn, Young Ho Ryu, Chang Sik Yoo, Chang Wook Yoon, Jin Sung Choi
  • Publication number: 20190026059
    Abstract: A system for linking and controlling terminals is disclosed. A user terminal includes an image unit configured to output image data corresponding to a first image to be shared with a receiving terminal viewed by a user of the user terminal, and a signal unit configured to transmit the image data outputted from the image unit and position information of a touch means touching the user terminal to the receiving terminal. Here, the position information is position information of the touch means touching the user terminal at a preset pressure level or lower or with a preset contact area or smaller, and is displayed on the receiving terminal in an image form.
    Type: Application
    Filed: September 26, 2018
    Publication date: January 24, 2019
    Inventor: Chang-sik YOO
  • Publication number: 20180351562
    Abstract: A digital phase locked loop realizing high bandwidth by using a rising edge and a falling edge of a signal is disclosed. The digital locked loop controls a frequency of a digitally controlled oscillator by using phase difference between rising edges of a reference signal and a feedback signal and phase difference between falling edges of the reference signal and the feedback signal.
    Type: Application
    Filed: November 10, 2016
    Publication date: December 6, 2018
    Applicant: INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY
    Inventor: Chang Sik YOO
  • Publication number: 20180316359
    Abstract: Disclosed is a phase-locked loop having a high bandwidth using the rising edge and falling edge of a signal. The disclosed phase-locked loop controls the frequency of a voltage control oscillator by comparing both a phase difference between rising edge of a reference signal and rising edge of a feedback signal and a phase difference between falling edge of the reference signal and falling edge of the feedback signal.
    Type: Application
    Filed: October 13, 2016
    Publication date: November 1, 2018
    Applicant: Industry-University Cooperation Foundation Hanyang University
    Inventors: Chang Sik YOO, Baek Jin LIM