Patents by Inventor Ji Hyo KANG

Ji Hyo KANG 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: 20220085811
    Abstract: A signal transmission circuit of a semiconductor device includes a first emphasis circuit and a second emphasis circuit. The first emphasis circuit feeds a signal of an output node back to an input node. The first emphasis circuit may perform a first emphasis operation on a signal of the input node and the signal of the output node by adjusting a feedback time of the first emphasis circuit. The second emphasis circuit may be connected in parallel with the first emphasis circuit to perform a feedback of the signal of the output node to the input node. The second emphasis circuit may perform a second emphasis operation on the signal of the input node and the signal of the output node by adjusting a feedback time of the second emphasis circuit.
    Type: Application
    Filed: February 8, 2021
    Publication date: March 17, 2022
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Patent number: 11271549
    Abstract: A semiconductor device includes a circuit including an input coupled to a first node; and a first signal control circuit configured to determine a voltage of the first node in a low power mode, wherein the first signal control circuit sets a voltage of the first node to a first value in an n-th occurrence of the low power mode and a second value different from the first value in an m-th occurrence of the low power mode, and wherein n and m are two different natural numbers.
    Type: Grant
    Filed: November 13, 2020
    Date of Patent: March 8, 2022
    Assignees: SK hynix Inc., Seoul National University R&DB Foundation
    Inventors: Shin Hyun Jeong, Suhwan Kim, Gi Moon Hong, Ji Hyo Kang, Jae Hyeok Yang, Dae Han Kwon, Dong Hyun Kim
  • Publication number: 20220029611
    Abstract: A clock distribution network includes a global driver configured to receive a pair of clock signals to generate a pair of global clock signals, a clock transmission driver configured to amplify the pair of global clock signals to generate a pair of transmission clock signals, a first boosting circuit configured to boost voltage levels of the pair of transmission clock signals to generate a pair of first boosted clock signals, a first local driver configured to shift voltage levels of the pair of first boosted clock signals to generate a pair of first local clock signals, a second boosting circuit configured to boost voltage levels of the pair of first boosted clock signals to generate a pair of second boosted clock signals, and a second local driver configured to shift voltage levels of the pair of second boosted clock signals to generate a pair of second local clock signals.
    Type: Application
    Filed: January 12, 2021
    Publication date: January 27, 2022
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Patent number: 11233500
    Abstract: A clock distribution network includes a global driver configured to receive a pair of clock signals to generate a pair of global clock signals, a clock transmission driver configured to amplify the pair of global clock signals to generate a pair of transmission clock signals, a first boosting circuit configured to boost voltage levels of the pair of transmission clock signals to generate a pair of first boosted clock signals, a first local driver configured to shift voltage levels of the pair of first boosted clock signals to generate a pair of first local clock signals, a second boosting circuit configured to boost voltage levels of the pair of first boosted clock signals to generate a pair of second boosted clock signals, and a second local driver configured to shift voltage levels of the pair of second boosted clock signals to generate a pair of second local clock signals.
    Type: Grant
    Filed: January 12, 2021
    Date of Patent: January 25, 2022
    Assignee: SK hynix Inc.
    Inventor: Ji Hyo Kang
  • Patent number: 11233489
    Abstract: An amplifier includes an amplification circuit, an equalization circuit, an output circuit, a first gain adjusting circuit, and a second gain adjusting circuit. The amplification circuit changes voltage levels of first and second amplification nodes based on first and second input signals. The equalization circuit changes the voltage levels of the first and second amplification nodes. The output circuit generates an output signal based on the voltage levels of the first and second amplification nodes. The first gain adjusting circuit changes voltage levels applied to the first and second amplification nodes based on the voltage levels of the first and second amplification nodes and a first gain control signal. The second gain adjusting circuit changes a voltage level of the output signal based on a second gain control signal.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: January 25, 2022
    Assignee: SK hynix Inc.
    Inventor: Ji Hyo Kang
  • Patent number: 11223503
    Abstract: A signal receiver circuit includes a first amplification circuit and an offset compensation circuit. The first amplification circuit generates a first amplified signal and a second amplified signal by amplifying an input signal and a reference voltage. The offset compensation circuit adjusts voltage levels of the first and second amplified signals based on a DC level of the input signal and a voltage level of the reference voltage.
    Type: Grant
    Filed: September 16, 2019
    Date of Patent: January 11, 2022
    Assignee: SK hynix Inc.
    Inventor: Ji Hyo Kang
  • Publication number: 20210359686
    Abstract: A clocked latch circuit includes an amplification circuit, a latch circuit, a first current source, and a second current source. The amplification circuit changes voltage levels of first and second output signals based on a clock signal, a first input signal, and a second input signal. The latch circuit maintains the voltage levels of the first and second output signals based on a complementary signal of the clock signal. The first current source allows a first current to flow to activate the amplification circuit. The second current source allows a second current that is different from the first current to flow to activate the latch circuit.
    Type: Application
    Filed: September 28, 2020
    Publication date: November 18, 2021
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Publication number: 20210328579
    Abstract: A semiconductor device includes a circuit including an input coupled to a first node; and a first signal control circuit configured to determine a voltage of the first node in a low power mode, wherein the first signal control circuit sets a voltage of the first node to a first value in an n-th occurrence of the low power mode and a second value different from the first value in an m-th occurrence of the low power mode, and wherein n and m are two different natural numbers.
    Type: Application
    Filed: November 13, 2020
    Publication date: October 21, 2021
    Inventors: Shin Hyun JEONG, Suhwan KIM, Gi Moon HONG, Ji Hyo KANG, Jae Hyeok YANG, Dae Han KWON, Dong Hyun KIM
  • Patent number: 11152939
    Abstract: A semiconductor apparatus includes a calibration circuit and a main driver. The calibration circuit is configured to generate a first calibration code when set to have a positive offset and generate a second calibration code when set to have a negative offset complementary to the positive offset. The main driver is configured to set a resistance value of the main driver based on the first and second calibration codes.
    Type: Grant
    Filed: April 27, 2020
    Date of Patent: October 19, 2021
    Assignee: SK hynix Inc.
    Inventor: Ji Hyo Kang
  • Patent number: 11128283
    Abstract: A transmitter may include an emphasis circuit suitable for generating a first pull-down driving signal in response to first data and delayed second data, and generating a first pull-up driving signal in response to second data and delayed first data, wherein the first and second data are a differential pair; a phase skew compensation circuit suitable for compensating for a phase skew between the first pull-up driving signal and the first pull-down driving signal to generate a second pull-up driving signal and a second pull-down driving signal; a pull-up driver suitable for pull-up driving an output node in response to the second pull-up driving signal; and a pull-down driver suitable for pull-down driving the output node in response to the second pull-down driving signal.
    Type: Grant
    Filed: August 7, 2020
    Date of Patent: September 21, 2021
    Assignee: SK hynix Inc.
    Inventor: Ji Hyo Kang
  • Publication number: 20210250000
    Abstract: A receiving circuit may include a first amplifying circuit, a second amplifying circuit, a third amplifying circuit, and a feedback circuit. The first amplifying circuit amplifies a first input signal and a second input signal to generate a first amplified signal and a second amplified signal, respectively. The second amplifying circuit amplifies the first amplified signal and the second amplified signal to generate a first preliminary output signal and a second preliminary output signal, respectively. The third amplifying circuit amplifies the first preliminary output signal and the second preliminary output signal to generate a first output signal and a second output signal, respectively. The feedback circuit changes voltage levels of the first amplified signal and the second amplified signal based on a current control signal, the first output signal, and the second output signal.
    Type: Application
    Filed: July 28, 2020
    Publication date: August 12, 2021
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Patent number: 11004483
    Abstract: A semiconductor apparatus includes a reference voltage generating circuit and a buffer. The reference voltage generating circuit may generate, based on a voltage setting signal, a first reference voltage and a second reference voltage, which has the same level as the first reference voltage or has a lower level than the first reference voltage by an amount of a unit level. The buffer may generate an output signal based on the first reference voltage, the second reference voltage and an input signal.
    Type: Grant
    Filed: June 2, 2020
    Date of Patent: May 11, 2021
    Assignee: SK hynix Inc.
    Inventor: Ji Hyo Kang
  • Publication number: 20210099172
    Abstract: A semiconductor apparatus includes a calibration circuit and a main driver. The calibration circuit is configured to generate a first calibration code when set to have a positive offset and generate a second calibration code when set to have a negative offset complementary to the positive offset. The main driver is configured to set a resistance value of the main driver based on the first and second calibration codes.
    Type: Application
    Filed: April 27, 2020
    Publication date: April 1, 2021
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Publication number: 20200294556
    Abstract: A semiconductor apparatus includes a reference voltage generating circuit and a buffer. The reference voltage generating circuit may generate, based on a voltage setting signal, a first reference voltage and a second reference voltage, which has the same level as the first reference voltage or has a lower level than the first reference voltage by an amount of a unit level. The buffer may generate an output signal based on the first reference voltage, the second reference voltage and an input signal.
    Type: Application
    Filed: June 2, 2020
    Publication date: September 17, 2020
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Publication number: 20200274741
    Abstract: A signal receiver circuit includes a first amplification circuit and an offset compensation circuit. The first amplification circuit generates a first amplified signal and a second amplified signal by amplifying an input signal and a reference voltage. The offset compensation circuit adjusts voltage levels of the first and second amplified signals based on a DC level of the input signal and a voltage level of the reference voltage.
    Type: Application
    Filed: September 16, 2019
    Publication date: August 27, 2020
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Publication number: 20200266787
    Abstract: An amplifier includes a first input circuit, a second input circuit, a first compensation circuit, a second compensation circuit. The first input circuit changes a voltage level of the negative output node based on a first input signal. The second input circuit changes a voltage level of the positive output node based on a second input signal. The first compensation circuit changes the voltage level of the positive output node based on the first input signal. The second compensation circuit changes the voltage level of the negative output node based on the second output signal.
    Type: Application
    Filed: October 10, 2019
    Publication date: August 20, 2020
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Publication number: 20200266779
    Abstract: An amplifier includes an amplification circuit, an equalization circuit, an output circuit, a first gain adjusting circuit, and a second gain adjusting circuit. The amplification circuit changes voltage levels of first and second amplification nodes based on first and second input signals. The equalization circuit changes the voltage levels of the first and second amplification nodes. The output circuit generates an output signal based on the voltage levels of the first and second amplification nodes. The first gain adjusting circuit changes voltage levels applied to the first and second amplification nodes based on the voltage levels of the first and second amplification nodes and a first gain control signal. The second gain adjusting circuit changes a voltage level of the output signal based on a second gain control signal.
    Type: Application
    Filed: September 4, 2019
    Publication date: August 20, 2020
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG
  • Patent number: 10699754
    Abstract: A semiconductor apparatus includes a reference voltage generating circuit and a buffer. The reference voltage generating circuit may generate, based on a voltage setting signal, a first reference voltage and a second reference voltage, which has the same level as the first reference voltage or has a lower level than the first reference voltage by an amount of a unit level. The buffer may generate an output signal based on the first reference voltage, the second reference voltage and an input signal.
    Type: Grant
    Filed: November 30, 2018
    Date of Patent: June 30, 2020
    Assignee: SK hynix Inc.
    Inventor: Ji Hyo Kang
  • Publication number: 20190348082
    Abstract: A semiconductor apparatus includes a reference voltage generating circuit and a buffer. The reference voltage generating circuit may generate, based on a voltage setting signal, a first reference voltage and a second reference voltage, which has the same level as the first reference voltage or has a lower level than the first reference voltage by an amount of a unit level. The buffer may generate an output signal based on the first reference voltage, the second reference voltage and an input signal.
    Type: Application
    Filed: November 30, 2018
    Publication date: November 14, 2019
    Applicant: SK hynix Inc.
    Inventor: Ji Hyo KANG