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).
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Publication number: 20210201962Abstract: A data driving circuit may include a trigger circuit and a pre-driver. The trigger circuit may be configured to block a remaining signal path among a plurality of signal paths for transmitting data except for a signal path corresponding to a currently selected driving strength. The pre-driver may be configured to drive data, which are transmitted through the signal path corresponding to the currently selected driving strength, using an impedance determined in accordance with a plurality of impedance control codes.Type: ApplicationFiled: June 16, 2020Publication date: July 1, 2021Applicant: SK hynix Inc.Inventor: Eun Ji CHOI
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Publication number: 20210194485Abstract: An impedance calibration circuit may include: a first driver having an impedance calibrated according to a first impedance control code, and configured to drive an output terminal according to first data; a second driver having an impedance calibrated according to a second impedance control code, and configured to drive the output terminal according to second data; and an impedance calibration circuit configured to calibrate the first impedance control code to a first target value set to a resistance value of an external resistor, and calibrate the second impedance control code to a second target value different from the resistance value of the external resistor.Type: ApplicationFiled: June 12, 2020Publication date: June 24, 2021Inventors: Eun Ji CHOI, Jin Ha HWANG, Keun Seon AHN, Yo Han JEONG
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Patent number: 10847194Abstract: An input/output circuit includes a data buffer group configured to buffer data received through data lines, a data strobe buffer configured to buffer a data strobe signal to output a buffered data strobe clock, a digitally controlled delay line configured to output delay data by controlling skew of the buffered data according to a delay code, a data strobe clock output circuit configured to generate a delay data strobe clock in response to the buffered data strobe clock, a sampler configured to sample the delay data according to the delay data strobe clock to output sampled data, and a de-skew circuit configured to update the delay code according to the sampled data.Type: GrantFiled: November 19, 2018Date of Patent: November 24, 2020Assignee: SK hynix Inc.Inventors: Dong Hyun Kim, Dae Han Kwon, Kwan Su Shon, Soon Ku Kang, Jung Hyun Shin, Doo Bock Lee, Yo Han Jeong, Eun Ji Choi, Tae Jin Hwang
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Patent number: 10742181Abstract: A buffer circuit includes a first buffer configured to operate at an external power voltage, generate first and second buffer signals by comparing an input signal with a reference voltage, and control potential levels of the first and second buffer signals in response to a common mode feedback voltage; a second buffer configured to operate at an internal power voltage and generate an output signal in response to the first and second buffer signals; and a replica circuit configured to generate the common mode feedback voltage to be less than the internal power voltage.Type: GrantFiled: October 18, 2018Date of Patent: August 11, 2020Assignee: SK hynix Inc.Inventors: Dong Hyun Kim, Eun Ji Choi, Yo Han Jeong, Jae Heung Kim
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Publication number: 20190296742Abstract: A buffer circuit includes a first buffer configured to operate at an external power voltage, generate first and second buffer signals by comparing an input signal with a reference voltage, and control potential levels of the first and second buffer signals in response to a common mode feedback voltage; a second buffer configured to operate at an internal power voltage and generate an output signal in response to the first and second buffer signals; and a replica circuit configured to generate the common mode feedback voltage to be less than the internal power voltage.Type: ApplicationFiled: October 18, 2018Publication date: September 26, 2019Inventors: Dong Hyun KIM, Eun Ji CHOI, Yo Han JEONG, Jae Heung KIM
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Publication number: 20190287587Abstract: An input/output circuit includes a data buffer group configured to buffer data received through data lines, a data strobe buffer configured to buffer a data strobe signal to output a buffered data strobe clock, a digitally controlled delay line configured to output delay data by controlling skew of the buffered data according to a delay code, a data strobe clock output circuit configured to generate a delay data strobe clock in response to the buffered data strobe clock, a sampler configured to sample the delay data according to the delay data strobe clock to output sampled data, and a de-skew circuit configured to update the delay code according to the sampled data.Type: ApplicationFiled: November 19, 2018Publication date: September 19, 2019Inventors: Dong Hyun KIM, Dae Han KWON, Kwan Su SHON, Soon Ku KANG, Jung Hyun SHIN, Doo Bock LEE, Yo Han JEONG, Eun Ji CHOI, Tae Jin HWANG
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Patent number: 10284156Abstract: An amplifier may include a differential pair circuit configured to generate an output signal according to a first input signal and a second input signal, a plurality of current sinks coupled between a ground terminal and the differential pair circuit, and a feedback circuit configured to sense a level of the output signal and generate a feedback signal. At least one of the plurality of current sinks is controlled according to the feedback signal.Type: GrantFiled: August 3, 2017Date of Patent: May 7, 2019Assignee: SK hynix Inc.Inventors: Dong Hyun Kim, Eun Ji Choi, Yo Han Jeong, Soon Ku Kang, Woo Jin Kang, Kwan Su Shon, Hyun Bae Lee, Tae Jin Hwang
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Publication number: 20180294784Abstract: An amplifier may include a differential pair circuit configured to generate an output signal according to a first input signal and a second input signal, a plurality of current sinks coupled between a ground terminal and the differential pair circuit, and a feedback circuit configured to sense a level of the output signal and generate a feedback signal. At least one of the plurality of current sinks is controlled according to the feedback signal.Type: ApplicationFiled: August 3, 2017Publication date: October 11, 2018Applicant: SK hynix Inc.Inventors: Dong Hyun KIM, Eun Ji CHOI, Yo Han JEONG, Soon Ku KANG, Woo Jin KANG, Kwan Su SHON, Hyun Bae LEE, Tae Jin HWANG
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Patent number: 9997250Abstract: A non-volatile memory device includes: a plurality of cache latches; a pair of input/output lines; a plurality of switches, each couples a corresponding cache latch to the pair of the input/output lines, when the corresponding cache latch is selected among the plurality of cache latches; a pre-charger suitable for pre-charging the pair of the input/output lines; and a sense-amplifier suitable for sensing and amplifying the data of the pair of the input/output lines, wherein the sense-amplifier operates with a first power source voltage, and the plurality of the cache latches, the plurality of the switches, and the pre-charger operate with a second power source voltage having a voltage level that is higher than the voltage level of the first power source voltage.Type: GrantFiled: October 7, 2016Date of Patent: June 12, 2018Assignee: SK Hynix Inc.Inventors: Kang-Woo Park, Eun-Ji Choi
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Patent number: 9859910Abstract: An analog to digital converter includes a first DAC unit configured to vary a level of a reference voltage output through a first node according to a first code, a second DAC unit coupled in parallel to the first DAC unit on the basis of the first node and configured to vary the level of the reference voltage according to a second code, a comparator configured to generate a comparison result signal by comparing an input voltage and the reference voltage, and at least one register array configured to store the first code and the second code with initial values and store the first code and the second code by varying values of the first code and the second code according to the comparison result signal.Type: GrantFiled: June 26, 2017Date of Patent: January 2, 2018Assignee: SK hynix Inc.Inventors: Dong Hyun Kim, Soon Ku Kang, Kwan Su Shon, Yo Han Jeong, Eun Ji Choi
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Patent number: 9830959Abstract: A semiconductor memory apparatus may include a memory cell circuit, a data latch circuit, and a first stage amplification circuit. The data latch circuit may be electrically coupled to the memory cell circuit by a bit line. The data latch circuit may latch data transferred through the bit line. The data latch circuit may output latched data to an input/output line in response to a cell select signal. The data first stage amplification circuit may generate driving data to a voltage level of an external power supply voltage in response to a voltage level of the input/output line. The data first stage amplification circuit may precharge the input/output line to a voltage level lower than the external power supply voltage and higher than a ground voltage in response to a precharge signal.Type: GrantFiled: November 7, 2016Date of Patent: November 28, 2017Assignee: SK hynix Inc.Inventors: Kang Woo Park, Eun Ji Choi
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Publication number: 20170271019Abstract: A non-volatile memory device includes: a plurality of cache latches; a pair of input/output lines; a plurality of switches, each couples a corresponding cache latch to the pair of the input/output lines, when the corresponding cache latch is selected among the plurality of cache latches; a pre-charger suitable for pre-charging the pair of the input/output lines; and a sense-amplifier suitable for sensing and amplifying the data of the pair of the input/output lines, wherein the sense-amplifier operates with a first power source voltage, and the plurality of the cache latches, the plurality of the switches, and the pre-charger operate with a second power source voltage having a voltage level that is higher than the voltage level of the first power source voltage.Type: ApplicationFiled: October 7, 2016Publication date: September 21, 2017Inventors: Kang-Woo PARK, Eun-Ji CHOI
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Publication number: 20170270981Abstract: A semiconductor memory apparatus may include a memory cell circuit, a data latch circuit, and a first stage amplification circuit. The data latch circuit may be electrically coupled to the memory cell circuit by a bit line. The data latch circuit may latch data transferred through the bit line. The data latch circuit may output latched data to an input/output line in response to a cell select signal. The data first stage amplification circuit may generate driving data to a voltage level of an external power supply voltage in response to a voltage level of the input/output line. The data first stage amplification circuit may precharge the input/output line to a voltage level lower than the external power supply voltage and higher than a ground voltage in response to a precharge signal.Type: ApplicationFiled: November 7, 2016Publication date: September 21, 2017Inventors: Kang Woo PARK, Eun Ji CHOI
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Patent number: 9230176Abstract: A method of detecting camera tempering and a system therefor are provided. The method includes: performing at least one of following operations: (i) detecting a size of a foreground in an image, and determining whether a first condition, that the size exceeds a first reference value, is satisfied, (ii) detecting change of a sum of the largest pixel value differences among pixel value differences between adjacent pixels in selected horizontal lines of the image, according to time, and determining whether a second condition, that the change lasts for a predetermined time period, is satisfied, and (iii) adding up a plurality of global motion vectors with respect to a plurality of images, and determining whether a third condition, that a sum of the global motion vectors exceeds a second reference value, is satisfied; and determining occurrence of camera tempering if at least one of the corresponding conditions is satisfied.Type: GrantFiled: March 12, 2013Date of Patent: January 5, 2016Assignee: Hanwha Techwin Co., Ltd.Inventors: Eun-Ji Choi, Jeong-Eun Lim, Il-Kwon Chang
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Patent number: 9189863Abstract: A method and system for detecting a motion of a target object in a thermal image by removing a shadow by heat of the target object from the thermal image. The motion detecting system includes: a learning unit obtaining at least one of size and brightness of a shadow by heat of a reference object based on characteristics of the shadow by heat of the reference object by temperature; and a detecting unit removing a shadow region of the target object from the thermal image including the target object based on at least one of the size and the brightness of the shadow by heat of the object.Type: GrantFiled: May 6, 2013Date of Patent: November 17, 2015Assignees: POSTECH ACADEMY-INDUSTRY FOUNDATION, Hanwha Techwin Co., Ltd.Inventors: Eun-Ji Choi, Seung-In Noh, Ji-Man Kim, Dae-Jin Kim
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Patent number: 9076268Abstract: A method and a system for analyzing multi-channel images are provided. The method includes: receiving a plurality of images through a plurality of channels, respectively; combining selected images among the plurality of images into a single image; and performing an image analysis with respect to: entirety of the combined image by treating the selected images as a single image; or each of the selected images in the combined image.Type: GrantFiled: March 11, 2013Date of Patent: July 7, 2015Assignee: SAMSUNG TECHWIN CO., LTD.Inventors: Eun-Ji Choi, Jeong-Eun Lim, Il-Kwon Chang
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Publication number: 20130343603Abstract: A method and system for detecting a motion of a target object in a thermal image by removing a shadow by heat of the target object from the thermal image. The motion detecting system includes: a learning unit obtaining at least one of size and brightness of a shadow by heat of a reference object based on characteristics of the shadow by heat of the reference object by temperature; and a detecting unit removing a shadow region of the target object from the thermal image including the target object based on at least one of the size and the brightness of the shadow by heat of the object.Type: ApplicationFiled: May 6, 2013Publication date: December 26, 2013Applicants: POSTECH ACADEMY-INDUSTRY FOUNDATION, SAMSUNG TECHWIN CO., LTD.Inventors: Eun-Ji CHOI, Seung-In NOH, Ji-Man KIM, Dae-Jin KIM
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Publication number: 20130236120Abstract: A method and a system for analyzing multi-channel images are provided. The method includes: receiving a plurality of images through a plurality of channels, respectively; combining selected images among the plurality of images into a single image; and performing an image analysis with respect to: entirety of the combined image by treating the selected images as a single image; or each of the selected images in the combined image.Type: ApplicationFiled: March 11, 2013Publication date: September 12, 2013Applicant: SAMSUNG TECHWIN CO., LTD.Inventors: Eun-Ji CHOI, Jeong-Eun LIM, Il-Kwon CHANG
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Patent number: 8317716Abstract: Disclosed herein is a system for diagnosing a deficient pulse and an forceful pulse. The system includes a pulse diagnotic device, a deficient pulse and forceful pulse determining device, and an output device. The pulse diagnotic device measures pulse condition information at an examinee's Cun (˜\f˜) Gu (H), and Chi (,R) pulse-taking locations on his or her wrist using one or more pulse-taking sensors. The deficient pulse and forceful pulse determining device is operably connected to the pulse diagnotic device, analyzes the pulse pressure information measured by the pulse diagnotic device, calculates a quantified deficiency/forceful coefficient, and determines whether a pulse of interest is a deficient pulse or an forceful pulse. The output device is connected to the determining device and displays results of the determination.Type: GrantFiled: September 28, 2007Date of Patent: November 27, 2012Assignee: Korea Institute of Oriental MedicineInventors: Jong Yeol Kim, Jeon Lee, Yu Jung Lee, Si Woo Lee, Jaehwan Kang, Hyunhee Ryu, Hae-Jung Lee, Eun-Ji Choi
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Publication number: 20110134236Abstract: A method and apparatus for stabilizing a locus of an object detected from a continuously-captured image, and an image monitoring system are provided. The apparatus includes: a detection unit which detects first information about the locus provided at a first time, from the continuously-captured image; a storage unit which stores second information about the locus provided at at least one other time; a correction unit which corrects the first information based on the second information; and a display unit which applies the corrected first information to the object in the continuously-captured image to display a modified locus corresponding to the corrected first information.Type: ApplicationFiled: August 17, 2010Publication date: June 9, 2011Applicant: SAMSUNG TECHWIN CO., LTD.Inventors: Young-gwan JO, Eun-ji CHOI, Jeong-eun LIM