Patents by Inventor Eun-Ji Choi

Eun-Ji Choi 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: 20250233589
    Abstract: An impedance calibration circuit includes a first leg set having an impedance calibrated to a first target impedance according to an impedance control code during an activation period of a first timing control signal, a second leg set having an impedance calibrated to a second target impedance according to the impedance control code during an activation period of a second timing control signal, a code generation circuit configured to calibrate and output a value of the impedance control code according to a result of comparing a voltage of a node, to which the first leg set is connected, with a reference voltage, and a timing control signal generation circuit configured to generate the first timing control signal and the second timing control signal having different activation periods in response to an impedance calibration enable signal.
    Type: Application
    Filed: April 4, 2025
    Publication date: July 17, 2025
    Applicant: SK hynix Inc.
    Inventor: Eun Ji CHOI
  • Publication number: 20250214457
    Abstract: A container transport apparatus capable of receiving power from batteries and charging the batteries while traveling along rails and a logistics handling system including the container transport apparatus are provided. The logistics handling system is installed in a semiconductor manufacturing plant and includes: a first container transport apparatus transporting a first container where a plurality of substrates are received; a container storage apparatus storing the first container; and a control apparatus controlling the travel of the first container transport apparatus, wherein the first container transport apparatus includes batteries and charges the batteries while traveling along rails.
    Type: Application
    Filed: July 23, 2024
    Publication date: July 3, 2025
    Applicant: SEMES CO., LTD.
    Inventors: Geochul JEONG, Byung Kwon LEE, Sik KIM, Yeong Jae CHOE, Eun Ji CHOI
  • Publication number: 20250218836
    Abstract: A container transporting apparatus equipped with a non-contact gear and a logistics processing system including the same are provided. The logistics processing system is installed in a semiconductor manufacturing plant and includes a container transporting apparatus for transporting a container containing a plurality of substrates; a container storage apparatus for storing the container therein; and a control device configured to control each of the container transporting apparatus and the container storage apparatus, wherein the container transporting apparatus includes a non-contact gear.
    Type: Application
    Filed: December 16, 2024
    Publication date: July 3, 2025
    Inventors: Geo Chul JEONG, Byung Kwon LEE, Yeong Jae CHOE, Eun Ji CHOI
  • Publication number: 20250193057
    Abstract: A receiver circuit includes an input unit configured to receive a reception pattern signal in a training mode, and a reception normal signal in a normal mode, an enable control unit configured to determine whether to activate an enable signal according to the reception pattern signal in the training mode, a first decision feedback equalizer configured to operate in an activation period of the enable signal, and to remove a first post-cursor component for the reception normal signal by calibrating a currently received value based on a previously received value of the reception normal signal, and a second decision feedback equalizer configured to, when the enable signal is in an activated state, remove second to Nth post-cursor components for the reception normal signal by adjusting driving abilities of input transistors, to which the currently received value is applied, according to patterns of the reception normal signal.
    Type: Application
    Filed: April 17, 2024
    Publication date: June 12, 2025
    Inventors: Jae Hyeong HONG, Gwan Woo KIM, Beom Kyu SEO, Keun Seon AHN, Soon Sung AN, Sung Hwa OK, Jun Seo JANG, Eun Ji CHOI
  • Publication number: 20250187852
    Abstract: An article transport device is provided. The article transport device comprises a housing including an internal space, a driving unit disposed on an upper portion of the housing and traveling along a driving rail installed on a ceiling, a hoist unit disposed in the internal space and gripping a first transport article, and an anti-drop unit installed in the housing and preventing the transport article from falling, wherein the anti-drop unit includes a stroke configured to move toward the internal space, and a contact portion installed at one end of the stroke and contacting the first transport article, wherein the contact portion has a step shape that descends in a direction toward the internal space.
    Type: Application
    Filed: December 6, 2024
    Publication date: June 12, 2025
    Inventors: Kyu Hyung PARK, Eun Ji CHOI, Jun Beom LEE
  • Publication number: 20250191623
    Abstract: An impedance calibration circuit includes a code generation circuit and a code update control circuit. The code generation circuit generates a first impedance code set by performing an impedance adjustment operation within an activated period of a data output enable signal generated in response to a read command. The code update control circuit prevents updating a second impedance code set to the first impedance code set until deactivation of the data output enable signal, wherein the second impedance code set is used in impedance adjustment of a transmitting circuit.
    Type: Application
    Filed: June 17, 2024
    Publication date: June 12, 2025
    Applicant: SK hynix Inc.
    Inventors: Jae Hyeong HONG, Gwan Woo KIM, Beom Kyu SEO, Keun Seon AHN, Sung Hwa OK, Ji Young LEE, Jun Seo JANG, Jae Hoon JUNG, Eun Ji CHOI
  • Publication number: 20250166679
    Abstract: Disclosed is a memory device including a data pad, at least one merge node, a first data path coupled between the data pad and the at least one merge node and outputting, in a first mode, a first data signal to the at least one merge node based on a data signal, a reference signal and a mode selection signal; a second data path coupled between the data pad and the at least one merge node and outputting, in a second mode, a second data signal to the at least one merge node based on the data signal, the reference signal and the mode selection signal; and a synchronization path coupled to the at least one merge node and outputting, in one of the first and second modes, a corresponding signal of the first and second data signals as a data signal synchronized with at least one data strobe signal.
    Type: Application
    Filed: April 3, 2024
    Publication date: May 22, 2025
    Inventors: Jae Hyeong HONG, Bon Kwang KOO, Ki Chang GWON, Chan Keun KWON, Beom Kyu SEO, Keun Seon AHN, Soon Sung AN, Sung Hwa OK, Ji Young LEE, Jun Seo JANG, Jae Hoon JUNG, Eun Ji CHOI
  • Publication number: 20250150066
    Abstract: A transmission circuit includes a plurality of driving units coupled with an input/output pad. The transmission circuit performs a data transmission operation by selecting at least one main driving unit corresponding to a predetermined driving strength from among the plurality of driving units and performs an equalization operation by selecting at least one auxiliary driving unit from among remaining driving units excluding the main driving unit.
    Type: Application
    Filed: April 3, 2024
    Publication date: May 8, 2025
    Applicant: SK hynix Inc.
    Inventors: Gwan Woo KIM, In Seok KONG, Keun Seon AHN, Sung Hwa OK, Eun Ji CHOI, Jae Hyeong HONG
  • Patent number: 12289102
    Abstract: An impedance calibration circuit includes a first leg set having an impedance calibrated to a first target impedance according to an impedance control code during an activation period of a first timing control signal, a second leg set having an impedance calibrated to a second target impedance according to the impedance control code during an activation period of a second timing control signal, a code generation circuit configured to calibrate and output a value of the impedance control code according to a result of comparing a voltage of a node, to which the first leg set is connected, with a reference voltage, and a timing control signal generation circuit configured to generate the first timing control signal and the second timing control signal having different activation periods in response to an impedance calibration enable signal.
    Type: Grant
    Filed: December 20, 2022
    Date of Patent: April 29, 2025
    Assignee: SK hynix Inc.
    Inventor: Eun Ji Choi
  • Publication number: 20250078879
    Abstract: Disclosed is an interface circuit and a semiconductor device including the same. The interface circuit may include a data pad, a first driving circuit connected between the data pad and a first supply node, and configured to adjust a first resistance value applied between the data pad and the first supply node according to termination modes and selectively drive the data pad with a first supply voltage, and a first tuning circuit connected between the first supply node and a first voltage supply terminal, and configured to tune the first resistance value according to the termination modes.
    Type: Application
    Filed: January 10, 2024
    Publication date: March 6, 2025
    Inventors: In Seok KONG, Gwan Woo KIM, Keun Seon AHN, Eun Ho YANG, Sung Hwa OK, Eun Ji CHOI, Jun Ho HONG
  • Publication number: 20250023530
    Abstract: A receiver circuit includes a first amplification stage and a second amplification stage. The first amplification stage is configured to generate a first output signal by differentially amplifying an input signal pair. The second amplification stage is configured to generate a second output signal by amplifying the first output signal. The receiver circuit is configured to deactivate the second amplification stage and then deactivate the first amplification stage.
    Type: Application
    Filed: December 12, 2023
    Publication date: January 16, 2025
    Applicant: SK hynix Inc.
    Inventors: Jun Seo JANG, Bon Kwang KOO, Beom Kyu SEO, Soon Sung AN, Sung Hwa OK, Eun Ji CHOI, Jae Hyeong HONG
  • Publication number: 20250006231
    Abstract: A transceiver includes a first inverter chain configured to deliver a signal in response to an enable signal and a second inverter chain which is coupled to the first inverter chain in parallel and configured to output a reset value of the signal in response to an inverted enable signal.
    Type: Application
    Filed: November 2, 2023
    Publication date: January 2, 2025
    Inventors: Jun Seo JANG, Sung Hwa OK, Eun Ji CHOI, Jae Hyeong HONG
  • Publication number: 20240355376
    Abstract: A voltage generation circuit includes a voltage generation unit configured to generate a reference voltage using a power supply voltage and output the reference voltage through a voltage output node. The voltage generation circuit also includes a pre-charge unit configured to drive the voltage output node using the power supply voltage in response to a pre-charge control signal. The voltage generation circuit further includes a pre-charge control unit configured to generate at least one sampling voltage using the power supply voltage and generate the pre-charge control signal according to a result obtained by comparing the at least one sampling voltage with the reference voltage.
    Type: Application
    Filed: August 23, 2023
    Publication date: October 24, 2024
    Applicant: SK hynix Inc.
    Inventors: Jae Hyeong HONG, In Seok KONG, Bon Kwang KOO, Gwan Woo KIM, Heon Ki KIM, Beom Kyu SEO, Keun Seon AHN, Soon Sung AN, Sung Hwa OK, Jung Yeop LEE, Ji Young LEE, Dong Wook JANG, Jun Seo JANG, Sun Ki CHO, Eun Ji CHOI
  • Patent number: 11908543
    Abstract: The present technology may include a first detection unit configured to generate an output signal by detecting a level of an input terminal in response to a transition of a control clock signal during a normal read operation, and a second detection unit configured to generate the output signal by detecting the level of the input terminal regardless of the transition of the control clock signal during a state information read operation.
    Type: Grant
    Filed: March 24, 2022
    Date of Patent: February 20, 2024
    Assignee: SK hynix Inc.
    Inventors: Eun Ji Choi, Keun Seon Ahn, Kwan Su Shon, Yo Han Jeong
  • Publication number: 20240014816
    Abstract: An impedance calibration circuit includes a first leg set having an impedance calibrated to a first target impedance according to an impedance control code during an activation period of a first timing control signal, a second leg set having an impedance calibrated to a second target impedance according to the impedance control code during an activation period of a second timing control signal, a code generation circuit configured to calibrate and output a value of the impedance control code according to a result of comparing a voltage of a node, to which the first leg set is connected, with a reference voltage, and a timing control signal generation circuit configured to generate the first timing control signal and the second timing control signal having different activation periods in response to an impedance calibration enable signal.
    Type: Application
    Filed: December 20, 2022
    Publication date: January 11, 2024
    Applicant: SK hynix Inc.
    Inventor: Eun Ji CHOI
  • Patent number: 11837310
    Abstract: The present disclosure relates to a memory device for correcting a pulse duty ratio and a memory system including the same, and relates to a memory device which corrects the duty ratio of a primary pulse of a memory device control signal, and a memory system including the same.
    Type: Grant
    Filed: January 5, 2022
    Date of Patent: December 5, 2023
    Assignee: SK hynix Inc.
    Inventors: Jaehyeong Hong, In Seok Kong, Gwan Woo Kim, Jae Young Park, Kwan Su Shon, Soon Sung An, Daeho Yang, Sung Hwa Ok, Junseo Jang, Yo Han Jeong, Eun Ji Choi
  • Patent number: 11799481
    Abstract: The present technology may include: a first logic gate coupled to an internal voltage terminal and configured to receive data and invert and output the data according to a first enable signal; and a second logic gate coupled to the internal voltage terminal and configured to invert an output of the first logic gate and to output an inverted output as a first buffer signal according to the first enable signal, and configured to compensate for a duty skew of the first buffer signal according to a level of an external voltage.
    Type: Grant
    Filed: December 13, 2021
    Date of Patent: October 24, 2023
    Assignee: SK hynix Inc.
    Inventors: Jin Ha Hwang, Yo Han Jeong, Eun Ji Choi
  • Patent number: 11631445
    Abstract: A semiconductor apparatus includes a memory controller and data storage configured to input and output data in synchronization with a clock signal provided from the memory controller. The data storage includes a memory cell array and a data output apparatus configure to output read data from the memory cell array by sensing a logic level of the read data during a low-level period of a first clock, which is an inverted signal of a divided clock of the clock signal, and a low-level period of a second clock, the second clock having a set to phase delay amount from the divided clock.
    Type: Grant
    Filed: June 7, 2021
    Date of Patent: April 18, 2023
    Assignee: SK hynix Inc.
    Inventor: Eun Ji Choi
  • Publication number: 20230111807
    Abstract: The present technology may include a first detection unit configured to generate an output signal by detecting a level of an input terminal in response to a transition of a control clock signal during a normal read operation, and a second detection unit configured to generate the output signal by detecting the level of the input terminal regardless of the transition of the control clock signal during a state information read operation.
    Type: Application
    Filed: March 24, 2022
    Publication date: April 13, 2023
    Applicant: SK hynix Inc.
    Inventors: Eun Ji CHOI, Keun Seon AHN, Kwan Su SHON, Yo Han JEONG
  • Publication number: 20230056686
    Abstract: The present disclosure relates to a memory device for correcting a pulse duty ratio and a memory system including the same, and relates to a memory device which corrects the duty ratio of a primary pulse of a memory device control signal, and a memory system including the same.
    Type: Application
    Filed: January 5, 2022
    Publication date: February 23, 2023
    Inventors: Jaehyeong HONG, In Seok KONG, Gwan Woo KIM, Jae Young PARK, Kwan Su SHON, Soon Sung AN, Daeho YANG, Sung Hwa OK, Junseo JANG, Yo Han JEONG, Eun Ji CHOI