Patents by Inventor Seung Tak Ryu
Seung Tak Ryu 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: 20240146322Abstract: A digital noise coupling circuit includes: an analog-to-digital converter (ADC) configured to convert a quantization error, generated in a process of converting a first analog signal into a first digital signal, into a first digital error signal; a delay cell comprising delay elements configured to delay a transmission of the first digital error signal based on a clock signal; and a digital-to-analog (DA) conversion circuit configured to perform, in an analog domain, noise shaping on the first digital error signal that is delayed and transmitted from the delay cell.Type: ApplicationFiled: August 7, 2023Publication date: May 2, 2024Applicants: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Seong Joong KIM, Seung Tak RYU, Kent Edrian LOZADA
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Publication number: 20240120895Abstract: A continuous time op-amp includes a differential op-amp configured to produce, and output through output lines, output signals amplified based on a difference between input signals inputted to the differential op-amp, and a common mode feedback (CMFB) circuit configured to feed a common mode voltage back to the op-amp through a feedback line in continuous time through a capacitive coupled path, wherein the CMFB circuit includes: feedback capacitors connected between the output lines and the feedback line; switched capacitors charged based on a common mode reference voltage; and switching elements configured to control a connection between the feedback capacitors and the switched capacitors.Type: ApplicationFiled: June 1, 2023Publication date: April 11, 2024Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and TechnologyInventors: Seong Joong KIM, Seung Tak RYU, Kent Edrian LOZADA
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Patent number: 11916523Abstract: An amplification apparatus includes an amplifier having an inverting terminal, and a non-inverting terminal connected to a reset voltage node, a first capacitor connected to the inverting terminal, an input voltage being applied to the first capacitor, a second capacitor connected to the inverting terminal and an output terminal of the amplifier, and a duty-cycled resistor, connected in parallel to the second capacitor, including a first resistor. The duty-cycled resistor is configured to connect the first resistor and the inverting terminal and to disconnect the first resistor and the reset voltage node during a first time interval included in a period to complete an on-and-off cycle of the duty-cycled resistor, and disconnect the first resistor and the inverting terminal and to connect the first resistor and the reset voltage node during a second time interval included in the period.Type: GrantFiled: April 13, 2021Date of Patent: February 27, 2024Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: Wonseok Lee, Kent Edrian Lozada, Seung Tak Ryu, Sang Joon Kim
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Publication number: 20230291413Abstract: An analog-to-digital converter includes: a sample/hold circuit, which samples an analog signal, and outputs a first voltage; a digital-to-analog conversion circuit, which converts a digital signal to output a second voltage; an amplifier, which amplifies the first voltage and the second voltage; a noise shaping filter, which integrates a residual voltage corresponding to a difference between the amplified first voltage and the amplified second voltage, and generates a first integration voltage and a second integration voltage; a comparator, which compares a sum of the amplified first voltage, the first integration voltage, and the second integration voltage with the amplified second voltage; and a SAR logic, which outputs the digital signal according to a comparison result of the comparator, and controls the digital-to-analog conversion circuit.Type: ApplicationFiled: March 8, 2023Publication date: September 14, 2023Inventors: KYUNGTEA PARK, Kun-Woo Park, Jae-Hyun Chung, OHJO KWON, Seung-Tak Ryu, KEUMDONG JUNG
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Publication number: 20230236067Abstract: Methods of sensor readout and calibration and circuits for performing the methods are disclosed. In some embodiments, the methods include driving an active sensor at a voltage. In some embodiments, the methods include use of a calibration sensor, and the circuits include the calibration sensor. In some embodiments, the methods include use of a calibration current source and circuits include the calibration current source. In some embodiments, a sensor circuit includes a Sigma-Delta ADC. In some embodiments, a column of sensors is readout using first and second readout circuits during a same row time.Type: ApplicationFiled: January 13, 2023Publication date: July 27, 2023Applicant: Obsidian Sensors, Inc.Inventors: Edward CHAN, Bing WEN, John HONG, Tallis CHANG, Seung-Tak RYU
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Patent number: 11555744Abstract: Methods of sensor readout and calibration and circuits for performing the methods are disclosed. In some embodiments, the methods include driving an active sensor at a voltage. In some embodiments, the methods include use of a calibration sensor, and the circuits include the calibration sensor. In some embodiments, the methods include use of a calibration current source and circuits include the calibration current source. In some embodiments, a sensor circuit includes a Sigma-Delta ADC. In some embodiments, a column of sensors is readout using first and second readout circuits during a same row time.Type: GrantFiled: April 17, 2019Date of Patent: January 17, 2023Assignee: Obsidian Sensors, Inc.Inventors: Edward Chan, Bing Wen, John Hong, Tallis Chang, Seung-Tak Ryu
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Publication number: 20220123700Abstract: An amplification apparatus includes an amplifier having an inverting terminal, and a non-inverting terminal connected to a reset voltage node, a first capacitor connected to the inverting terminal, an input voltage being applied to the first capacitor, a second capacitor connected to the inverting terminal and an output terminal of the amplifier, and a duty-cycled resistor, connected in parallel to the second capacitor, including a first resistor. The duty-cycled resistor is configured to connect the first resistor and the inverting terminal and to disconnect the first resistor and the reset voltage node during a first time interval included in a period to complete an on-and-off cycle of the duty-cycled resistor, and disconnect the first resistor and the inverting terminal and to connect the first resistor and the reset voltage node during a second time interval included in the period.Type: ApplicationFiled: April 13, 2021Publication date: April 21, 2022Applicants: Samsung Electronics Co., Ltd, Korea Advanced Institute of Science and TechnologyInventors: Wonseok LEE, Kent Edrian LOZADA, Seung Tak RYU, Sang Joon KIM
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Publication number: 20210102844Abstract: Methods of sensor readout and calibration and circuits for performing the methods are disclosed. In some embodiments, the methods include driving an active sensor at a voltage. In some embodiments, the methods include use of a calibration sensor, and the circuits include the calibration sensor. In some embodiments, the methods include use of a calibration current source and circuits include the calibration current source. In some embodiments, a sensor circuit includes a Sigma-Delta ADC. In some embodiments, a column of sensors is readout using first and second readout circuits during a same row time.Type: ApplicationFiled: April 17, 2019Publication date: April 8, 2021Applicant: Obsidian Sensors, Inc.Inventors: Edward CHAN, Bing WEN, John HONG, Tallis CHANG, Seung-Tak RYU
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Patent number: 10931298Abstract: An analog-to-digital converter includes an input buffer connected to an input terminal receiving an input signal through a first sampling switch, a comparator connected to the input buffer, a sampling capacitor connected between the input buffer and the comparator, and connected to a second sampling switch, a digital-to-analog converter connected to the comparator, and a controller, connected between the comparator and the digital-to-analog converter, configured to output a signal to the digital-to-analog converter based on the comparator.Type: GrantFiled: August 8, 2019Date of Patent: February 23, 2021Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: JongPal Kim, Seung Tak Ryu, Min Jae Seo
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Patent number: 10873337Abstract: An electronic circuit includes a first converting circuit, an amplifying circuit, and a second converting circuit. The first converting circuit outputs a first residual voltage associated with converting an analog signal into a first digital signal and a second residual voltage generated based on the first residual voltage. The amplifying circuit generates a third residual voltage by amplifying the first residual voltage through an amplifying path during a first time duration and generates a fourth residual voltage by amplifying the second residual voltage through the amplifying path during a second time duration after the first time duration. The second converting circuit generates a second digital signal associated with the analog signal by performing an interpolation operation based on the third residual voltage and the fourth residual voltage.Type: GrantFiled: February 24, 2020Date of Patent: December 22, 2020Assignee: Korea Advanced Institute of Science and TechnologyInventors: Seung-Tak Ryu, Minjae Seo
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Patent number: 10778239Abstract: An electronic circuit includes an analog to digital converter (ADC) and a noise coupling filter. The ADC generates a digital output signal based on a first analog signal and a second analog signal. The noise coupling filter generates the second analog signal to be fed back for an input to the ADC, based on a first quantization error signal associated with converting the first analog signal to the digital output signal. The noise coupling filter performs noise shaping on a digital error signal derived from the quantization error signal and generates the second analog signal from a result of the noise shaping, using a clock in the digital domain.Type: GrantFiled: April 8, 2019Date of Patent: September 15, 2020Assignees: SAMSUNG ELECTRONICS CO., LTD., KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Ilhoon Jang, Seung-Tak Ryu, Hyungjong Ko, Miyoung Kim, Seungyeob Baek, Min-Jae Seo, Jaekeun Lee, Michael Choi
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Publication number: 20200274543Abstract: An electronic circuit includes a first converting circuit, an amplifying circuit, and a second converting circuit. The first converting circuit outputs a first residual voltage associated with converting an analog signal into a first digital signal and a second residual voltage generated based on the first residual voltage. The amplifying circuit generates a third residual voltage by amplifying the first residual voltage through an amplifying path during a first time duration and generates a fourth residual voltage by amplifying the second residual voltage through the amplifying path during a second time duration after the first time duration. The second converting circuit generates a second digital signal associated with the analog signal by performing an interpolation operation based on the third residual voltage and the fourth residual voltage.Type: ApplicationFiled: February 24, 2020Publication date: August 27, 2020Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seung-Tak RYU, Minjae Seo
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Publication number: 20200274546Abstract: An analog-to-digital converter includes an input buffer connected to an input terminal receiving an input signal through a first sampling switch, a comparator connected to the input buffer, a sampling capacitor connected between the input buffer and the comparator, and connected to a second sampling switch, a digital-to-analog converter connected to the comparator, and a controller, connected between the comparator and the digital-to-analog converter, configured to output a signal to the digital-to-analog converter based on the comparator.Type: ApplicationFiled: August 8, 2019Publication date: August 27, 2020Applicants: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: JongPal KIM, Seung Tak RYU, Min Jae SEO
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Patent number: 10680636Abstract: An analog-to-digital converter (ADC) is provided. The ADC may include an input terminal configured to receive input signals, a digital-to-analog converter (DAC), a first switch configured to control a connection between the DAC and the input terminal, a comparator, a second switch configured to control a connection between the DAC and the comparator, and a controller configured to control the first switch, the second switch, the DAC and the comparator.Type: GrantFiled: March 13, 2019Date of Patent: June 9, 2020Assignees: Samsung Electronics Co., Ltd., Korea Advanced Institute of Science and TechnologyInventors: JongPal Kim, Ye Dam Kim, Seung Tak Ryu, Min Jae Seo, Dong Hwan Jin
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Publication number: 20190372581Abstract: An electronic circuit includes an analog to digital converter (ADC) and a noise coupling filter. The ADC generates a digital output signal based on a first analog signal and a second analog signal. The noise coupling filter generates the second analog signal to be fed back for an input to the ADC, based on a first quantization error signal associated with converting the first analog signal to the digital output signal. The noise coupling filter performs noise shaping on a digital error signal derived from the quantization error signal and generates the second analog signal from a result of the noise shaping, using a clock in the digital domain.Type: ApplicationFiled: April 8, 2019Publication date: December 5, 2019Inventors: ILHOON JANG, Seung-Tak Ryu, Hyungjong Ko, Miyoung Kim, Seungyeob Baek, Min-Jae Seo, Jaekeun Lee, Michael Choi
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Patent number: 10454489Abstract: An electronic circuit includes a reference ADC, a delay circuit, and a main ADC. The reference ADC converts an input signal to an upper bit string of output data, in response to a reference clock. The delay circuit delays a source clock by a delay time to output a main clock. The main ADC converts the input signal to a lower bit string of the output data, in response to the main clock. When a value of the most significant bit included in the lower bit string is identical to a value of the bit which is adjacent to the most significant bit and lower than the most significant bit, the delay time is adjusted based on a direction in which a level of the input signal is changed and the value of the most significant bit of the lower bit string.Type: GrantFiled: November 19, 2018Date of Patent: October 22, 2019Assignee: Korea Advanced Institute of Science and TechnologyInventors: Seung-Tak Ryu, Dongjin Chang
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Publication number: 20190296760Abstract: An analog-to-digital converter (ADC) is provided. The ADC comprises an input terminal configured to receive input signals, a digital-to-analog converter (DAC), a first switch configured to control a connection between the DAC and the input terminal, a comparator, a second switch configured to control a connection between the DAC and the comparator, and a controller configured to control the first switch, the second switch, the DAC and the comparator.Type: ApplicationFiled: March 13, 2019Publication date: September 26, 2019Applicants: SAMSUNG ELECTRONICS CO., LTD., Korea Advanced Institute of Science and TechnologyInventors: JongPal KIM, Ye Dam KIM, Seung Tak RYU, Min Jae SEO, Dong Hwan JIN
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Patent number: 10425087Abstract: The exemplary embodiments of the present disclosure relate to a phase adjustment apparatus, and its operation method, provided with a phase detector, phase controller and phase calibrator for reducing complexity of a circuit and enabling execution of a phase adjustment operation in the background.Type: GrantFiled: April 18, 2018Date of Patent: September 24, 2019Assignee: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seung Tak Ryu, Woo Cheol Kim
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Publication number: 20190288697Abstract: The exemplary embodiments of the present disclosure relate to a phase adjustment apparatus, and its operation method, provided with a phase detector, phase controller and phase calibrator for reducing complexity of a circuit and enabling execution of a phase adjustment operation in the background.Type: ApplicationFiled: April 18, 2018Publication date: September 19, 2019Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seung Tak RYU, Woo Cheol KIM
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Publication number: 20190222220Abstract: An electronic circuit includes a reference ADC, a delay circuit, and a main ADC. The reference ADC converts an input signal to an upper bit string of output data, in response to a reference clock. The delay circuit delays a source clock by a delay time to output a main clock. The main ADC converts the input signal to a lower bit string of the output data, in response to the main clock. When a value of the most significant bit included in the lower bit string is identical to a value of the bit which is adjacent to the most significant bit and lower than the most significant bit, the delay time is adjusted based on a direction in which a level of the input signal is changed and the value of the most significant bit of the lower bit string.Type: ApplicationFiled: November 19, 2018Publication date: July 18, 2019Applicant: KOREA ADVANCED INSTITUTE OF SCIENCE AND TECHNOLOGYInventors: Seung-Tak RYU, Dongjin CHANG