Patents by Inventor Gil Sung ROH

Gil Sung ROH 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: 20240235562
    Abstract: The present disclosure relates to a deadlock recovery unit for applying a one-shot pulse signal to restart a Voltage Controlled Oscillator (VCO) when the output clock signal of the VCO remains in a high state or a low state. The deadlock recovery unit includes a VCO clock monitoring unit for monitoring a clock signal of a voltage control oscillator; a pulse signal generating unit for outputting a one-shot pulse signal to reset the VCO when a clock signal is not counted; and a control signal generating unit for generating a VCO counter enable signal applied to the VCO clock monitoring unit and a detector clock signal applied to the pulse signal generating unit by using an externally supplied reference clock signal.
    Type: Application
    Filed: November 9, 2023
    Publication date: July 11, 2024
    Applicant: Magnachip Semiconductor, Ltd.
    Inventors: Chel Ho CHUNG, Gil Sung ROH
  • Patent number: 11552656
    Abstract: A transmission driver includes a pulse generator and a current mode logic driver. The pulse generator is configured to generate and output a first pulse signal by synchronizing at a falling edge time point of a first input signal, and generate and output a second pulse signal by synchronizing at a falling edge time point of a second input signal. The current mode logic driver is configured to output a pre-emphasis signal to which pre-emphasis technique has been applied by changing a first load resistance value and a second load resistance value based on the first pulse signal and the second pulse signal, respectively.
    Type: Grant
    Filed: May 17, 2021
    Date of Patent: January 10, 2023
    Assignee: MagnaChip Semiconductor, Ltd.
    Inventors: Gil Sung Roh, Sang Kyung Kim
  • Patent number: 11467623
    Abstract: A reception device that communicates with a transmission device is provided. The reception device includes a reception circuit configured to receive a clock signal, a first data signal, and a second data signal from the transmission device, a signal synchronization circuit configured to adjust the phases of the first data signal and the second data signal, and generate a first synchronization data signal and a second synchronization data signal, a signal distribution circuit configured to adjust the phase of the clock signal and generate a first distributed clock signal and a second distributed clock signal, and adjust the phases of the first synchronization data signal and the second synchronization data signal and generate a first distributed data signal and a second distributed data signal, and an output circuit configured to process the first distributed data signal and the second distributed data signal.
    Type: Grant
    Filed: September 30, 2019
    Date of Patent: October 11, 2022
    Assignee: MagnaChip Semiconductor, Ltd.
    Inventors: Gil Sung Roh, Sang Kyung Kim, Ji Hoon Ha
  • Patent number: 11283432
    Abstract: A device includes a clock delay circuit configured to receive a reference clock signal and generate N delay clock signals, where N is a natural number greater than or equal to 2, by using the reference clock signal, and an output circuit configured to receive the N delay clock signals and output at least a portion of the delay clock signals from among the N delay clock signals as an output signal, wherein a phase delay of a delay clock signal that is output later in time from among the at least the portion of the delay clock signals is greater than or equal to a phase delay of a delay clock signal that is output earlier in time, and wherein a cycle of the output clock signal is longer than or equal to a cycle of the reference clock signal.
    Type: Grant
    Filed: September 11, 2020
    Date of Patent: March 22, 2022
    Assignee: MagnaChip Semiconductor, Ltd.
    Inventors: Dong Ho Kim, Gil Sung Roh
  • Publication number: 20220045701
    Abstract: A transmission driver includes a pulse generator and a current mode logic driver. The pulse generator is configured to generate and output a first pulse signal by synchronizing at a falling edge time point of a first input signal, and generate and output a second pulse signal by synchronizing at a falling edge time point of a second input signal. The current mode logic driver is configured to output a pre-emphasis signal to which pre-emphasis technique has been applied by changing a first load resistance value and a second load resistance value based on the first pulse signal and the second pulse signal, respectively.
    Type: Application
    Filed: May 17, 2021
    Publication date: February 10, 2022
    Applicant: MagnaChip Semiconductor, Ltd.
    Inventors: Gil Sung ROH, Sang Kyung KIM
  • Patent number: 11233517
    Abstract: An auto trimming device includes an oscillator configured to generate an oscillator clock signal, a subtractor configured to receive an expected value for a target frequency and the oscillator clock signal, configured to output a difference value between the expected value and the oscillator clock signal, an index value selector configured to calculate a unit index value using the difference value and configured to detect and output a target index value from the unit index value, an index value register configured to output an oscillator trimming code corresponding to the target index value to the oscillator, and an embedded memory configured to store the oscillator trimming code as a target oscillator trimming code for the target frequency.
    Type: Grant
    Filed: July 1, 2020
    Date of Patent: January 25, 2022
    Assignee: MagnaChip Semiconductor, Ltd.
    Inventors: Yong Sup Lee, Gil Sung Roh
  • Publication number: 20210409011
    Abstract: A device includes a clock delay circuit configured to receive a reference clock signal and generate N delay clock signals, where N is a natural number greater than or equal to 2, by using the reference clock signal, and an output circuit configured to receive the N delay clock signals and output at least a portion of the delay clock signals from among the N delay clock signals as an output signal, wherein a phase delay of a delay clock signal that is output later in time from among the at least the portion of the delay clock signals is greater than or equal to a phase delay of a delay clock signal that is output earlier in time, and wherein a cycle of the output clock signal is longer than or equal to a cycle of the reference clock signal.
    Type: Application
    Filed: September 11, 2020
    Publication date: December 30, 2021
    Applicant: MagnaChip Semiconductor, Ltd.
    Inventors: Dong Ho Kim, Gil Sung Roh
  • Patent number: 11112818
    Abstract: A reception apparatus communicating with a transmission apparatus with a clock lane and a data lane. The reception apparatus comprises a clock lane control circuit configured to determine the operation mode of the clock lane based on a clock signal transmitted through the clock lane, and performing an operation based on the determined operation mode of the clock lane, and a data lane control circuit configured to determine the operation mode of the data lane based on a data signal transmitted from the transmission apparatus, and performing an operation based on the determined operation mode of the data lane, and the clock lane control circuit is configured to set the operation mode of the clock lane to a high-speed mode, when the operation mode of the data lane is switched from a low-power mode to the high-speed mode.
    Type: Grant
    Filed: October 16, 2019
    Date of Patent: September 7, 2021
    Assignee: MagnaChip Semiconductor, Ltd.
    Inventors: Su Hyun Kim, Sang Kyung Kim, Gil Sung Roh
  • Publication number: 20210203327
    Abstract: An auto trimming device includes an oscillator configured to generate an oscillator clock signal, a subtractor configured to receive an expected value for a target frequency and the oscillator clock signal, configured to output a difference value between the expected value and the oscillator clock signal, an index value selector configured to calculate a unit index value using the difference value and configured to detect and output a target index value from the unit index value, an index value register configured to output an oscillator trimming code corresponding to the target index value to the oscillator, and an embedded memory configured to store the oscillator trimming code as a target oscillator trimming code for the target frequency.
    Type: Application
    Filed: July 1, 2020
    Publication date: July 1, 2021
    Applicant: MagnaChip Semiconductor, Ltd.
    Inventors: Yong Sup LEE, Gil Sung ROH
  • Publication number: 20200159280
    Abstract: A reception apparatus communicating with a transmission apparatus with a clock lane and a data lane. The reception apparatus comprises a clock lane control circuit configured to determine the operation mode of the clock lane based on a clock signal transmitted through the clock lane, and performing an operation based on the determined operation mode of the clock lane, and a data lane control circuit configured to determine the operation mode of the data lane based on a data signal transmitted from the transmission apparatus, and performing an operation based on the determined operation mode of the data lane, and the clock lane control circuit is configured to set the operation mode of the clock lane to a high-speed mode, when the operation mode of the data lane is switched from a low-power mode to the high-speed mode.
    Type: Application
    Filed: October 16, 2019
    Publication date: May 21, 2020
    Applicant: MagnaChip Semiconductor, Ltd.
    Inventors: Su Hyun KIM, Sang Kyung KIM, Gil Sung ROH
  • Publication number: 20200133329
    Abstract: A reception device that communicates with a transmission device is provided. The reception device includes a reception circuit configured to receive a clock signal, a first data signal, and a second data signal from the transmission device, a signal synchronization circuit configured to adjust the phases of the first data signal and the second data signal, and generate a first synchronization data signal and a second synchronization data signal, a signal distribution circuit configured to adjust the phase of the clock signal and generate a first distributed clock signal and a second distributed clock signal, and adjust the phases of the first synchronization data signal and the second synchronization data signal and generate a first distributed data signal and a second distributed data signal, and an output circuit configured to process the first distributed data signal and the second distributed data signal.
    Type: Application
    Filed: September 30, 2019
    Publication date: April 30, 2020
    Applicant: Magnachip Semiconductor, Ltd.
    Inventors: Gil Sung ROH, Sang Kyung KIM, Ji Hoon HA