Patents by Inventor Hwa-Yeal Yu
Hwa-Yeal Yu 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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Patent number: 10965214Abstract: An electronic device includes a power management integrated circuit (PMIC) including a plurality of regulators. Each of the plurality of regulators has a current meter configured to measure a respective load current. A load device is configured to receive real-time load current information from the PMIC and to perform a performance improvement operation based on the real-time load current information.Type: GrantFiled: January 9, 2019Date of Patent: March 30, 2021Assignee: Samsung Electronics Co., Ltd.Inventors: Minho Choi, Yus Ko, Dongjin Keum, Hwa Yeal Yu, Younghoon Lee
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Patent number: 10727733Abstract: A semiconductor device includes an inductor selectively connected to a power supply voltage and configured to store and release energy; a first transistor connected between the power supply voltage and the inductor and configured to provide the power supply voltage to the inductor; a second transistor connected to the first transistor in series, connected between the inductor and a ground voltage, and configured to provide the ground voltage to the inductor; a modulator configured to provide a modulation signal to a control circuit configured to control the first and second transistors by performing pulse width modulation (PWM); a current sensor configured to sense an amount of current passing through the first transistor and generate a first output signal based on the sensed amount of current; and a first overcurrent protection output generator configured to generate a second output signal based on the first output signal and a first reference signal.Type: GrantFiled: July 17, 2017Date of Patent: July 28, 2020Assignee: Samsung Electronics Co., Ltd.Inventors: Ho Yeon Jeon, Hwa Yeal Yu, Seung Gyu Lee, Eun Suk Kim
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Publication number: 20190149045Abstract: An electronic device includes a power management integrated circuit (PMIC) including a plurality of regulators. Each of the plurality of regulators has a current meter configured to measure a respective load current. A load device is configured to receive real-time load current information from the PMIC and to perform a performance improvement operation based on the real-time load current information.Type: ApplicationFiled: January 9, 2019Publication date: May 16, 2019Applicant: Samsung Electronics Co., Ltd.Inventors: Minho Choi, Yus Ko, Dongjin Keum, Hwa Yeal Yu, Younghoon Lee
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Patent number: 10205388Abstract: An electronic device includes a power management integrated circuit (PMIC) including a plurality of regulators. Each of the plurality of regulators has a current meter configured to measure a respective load current. A load device is configured to receive real-time load current information from the PMIC and to perform a performance improvement operation based on the real-time load current information.Type: GrantFiled: October 1, 2015Date of Patent: February 12, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Minho Choi, Yus Ko, Dongjin Keum, Hwa Yeal Yu, Younghoon Lee
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Patent number: 10075071Abstract: An electronic device includes a load device and a power management integrated circuit. The power management integrated circuit is configured to calculate a load power value and provide the load power value to the load device in response to a request from the load device. The power management integrated circuit includes a plurality of regulators and a controller. Each of the plurality of regulators includes a current meter for measuring a load current value to be provided to the load device, and the controller is configured to calculate the load power value by using the load current value measured by the current meter and a load voltage value provided from each of the plurality of regulators to the load device.Type: GrantFiled: July 18, 2017Date of Patent: September 11, 2018Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Young Min Park, Young Hoon Lee, Yus Ko, Hwa Yeal Yu, Min Ho Choi
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Publication number: 20180138806Abstract: A semiconductor device includes an inductor selectively connected to a power supply voltage and configured to store and release energy; a first transistor connected between the power supply voltage and the inductor and configured to provide the power supply voltage to the inductor; a second transistor connected to the first transistor in series, connected between the inductor and a ground voltage, and configured to provide the ground voltage to the inductor; a modulator configured to provide a modulation signal to a control circuit configured to control the first and second transistors by performing pulse width modulation (PWM); a current sensor configured to sense an amount of current passing through the first transistor and generate a first output signal based on the sensed amount of current; and a first overcurrent protection output generator configured to generate a second output signal based on the first output signal and a first reference signal.Type: ApplicationFiled: July 17, 2017Publication date: May 17, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Ho Yeon JEON, Hwa Yeal YU, Seung Gyu LEE, Eun Suk KIM
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Publication number: 20180048230Abstract: An electronic device includes a load device and a power management integrated circuit. The power management integrated circuit is configured to calculate a load power value and provide the load power value to the load device in response to a request from the load device. The power management integrated circuit includes a plurality of regulators and a controller. Each of the plurality of regulators includes a current meter for measuring a load current value to be provided to the load device, and the controller is configured to calculate the load power value by using the load current value measured by the current meter and a load voltage value provided from each of the plurality of regulators to the load device.Type: ApplicationFiled: July 18, 2017Publication date: February 15, 2018Inventors: YOUNG MIN PARK, YOUNG HOON LEE, YUS KO, HWA YEAL YU, MIN HO CHOI
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Patent number: 9641076Abstract: A switching regulator switches a current from input direct current (DC) power to generate target DC power. The switching regulator includes: a direct current (DC)-DC converter and a ripple injection circuit. The DC-DC converter is configured to: generate an output voltage at an output terminal based on an input voltage applied to an input terminal, and according to a switching cycle that selectively forms a voltage-down current path or a voltage-up current path based on a comparison between a reference voltage and a voltage sensed at a feedback node; and apply a feedback current from the output terminal to the feedback node. The ripple injection circuit is configured to: generate a pulse current synchronized with the switching cycle; and apply the pulse current to the feedback node.Type: GrantFiled: January 5, 2015Date of Patent: May 2, 2017Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Ryotaro Kudo, Gwang-yol Noh, Hwa-yeal Yu
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Patent number: 9548661Abstract: A DC-DC converter is provided. The DC-DC converter includes at least one converter circuit configured to include an inductor and to supply a current to a load through the inductor; and a controller configured to sense the current to generate a sensed signal, to sample and hold the sensed signal at a predetermined sampling time to detect an average current of the inductor, and to control an operation of the at least one converter circuit according to the average current. The sampling time is set to a time in a period while the inductor current is less than a peak and greater than a valley.Type: GrantFiled: April 15, 2015Date of Patent: January 17, 2017Assignee: Samsung Electronics Co., Ltd.Inventors: Kudo Ryotaro, Gwang Yol Noh, Hwa Yeal Yu
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Patent number: 9438109Abstract: A bi-directional voltage positioning circuit includes a voltage to current converter, a current mirror circuit and a switch. The voltage to current converter converts a sensing voltage to a first current, and the sensing voltage is sensed based on a current flowing through an output coil connected between a switching node and an output node. The current mirror circuit mirrors the first current to generate a second current and a third current, the second current is N times greater than the first current, the third current is M times greater than the first current, and N and M are real numbers greater than zero. The switch provides a feedback node with one of the second current and third current in response to a switching control signal, and an output voltage of the output node is divided at the feedback node.Type: GrantFiled: February 24, 2014Date of Patent: September 6, 2016Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Sung-Woo Moon, Myeong-Lyong Ko, Yu-Seok Ko, Dong-Jin Keum, Hyun-Wook Yoo, Hwa-Yeal Yu
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Publication number: 20160111958Abstract: An electronic device includes a power management integrated circuit (PMIC) including a plurality of regulators. Each of the plurality of regulators has a current meter configured to measure a respective load current. A load device is configured to receive real-time load current information from the PMIC and to perform a performance improvement operation based on the real-time load current information.Type: ApplicationFiled: October 1, 2015Publication date: April 21, 2016Inventors: Minho CHOI, Yus KO, Dongjin KEUM, Hwa Yeal YU, Younghoon LEE
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Publication number: 20150303808Abstract: A DC-DC converter is provided. The DC-DC converter includes at least one converter circuit configured to include an inductor and to supply a current to a load through the inductor; and a controller configured to sense the current to generate a sensed signal, to sample and hold the sensed signal at a predetermined sampling time to detect an average current of the inductor, and to control an operation of the at least one converter circuit according to the average current. The sampling time is set to a time in a period while the inductor current is less than a peak and greater than a valley.Type: ApplicationFiled: April 15, 2015Publication date: October 22, 2015Inventors: KUDO RYOTARO, GWANG YOL NOH, HWA YEAL YU
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Publication number: 20150194892Abstract: A switching regulator switches a current from input direct current (DC) power to generate target DC power. The switching regulator includes: a direct current (DC)-DC converter and a ripple injection circuit. The DC-DC converter is configured to: generate an output voltage at an output terminal based on an input voltage applied to an input terminal, and according to a switching cycle that selectively forms a voltage-down current path or a voltage-up current path based on a comparison between a reference voltage and a voltage sensed at a feedback node; and apply a feedback current from the output terminal to the feedback node. The ripple injection circuit is configured to: generate a pulse current synchronized with the switching cycle; and apply the pulse current to the feedback node.Type: ApplicationFiled: January 5, 2015Publication date: July 9, 2015Inventors: Ryotaro KUDO, Gwang-yol NOH, Hwa-yeal YU
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Publication number: 20140253073Abstract: A bi-directional voltage positioning circuit includes a voltage to current converter, a current mirror circuit and a switch. The voltage to current converter converts a sensing voltage to a first current, and the sensing voltage is sensed based on a current flowing through an output coil connected between a switching node and an output node. The current mirror circuit mirrors the first current to generate a second current and a third current, the second current is N times greater than the first current, the third current is M times greater than the first current, and N and M are real numbers greater than zero. The switch provides a feedback node with one of the second current and third current in response to a switching control signal, and an output voltage of the output node is divided at the feedback node.Type: ApplicationFiled: February 24, 2014Publication date: September 11, 2014Inventors: Sung-Woo MOON, Myeong-Lyong KO, Yu-Seok KO, Dong-Jin KEUM, Hyun-Wook YOO, Hwa-Yeal YU
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Patent number: 8368477Abstract: A receiver is provided. The receiver includes a differential amplifier amplifying differential input signals input to input terminals and outputting differential output signals through output terminals and an oscillator connected to the output terminals of the differential amplifier. The differential amplifier and the oscillator operate alternatively in response to an enable signal.Type: GrantFiled: July 27, 2010Date of Patent: February 5, 2013Assignee: Samsung Electronics Co., LtdInventors: Hyun Won Moon, Hwa Yeal Yu
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Publication number: 20120064839Abstract: A transmitter includes an input unit, a transmission phase locked loop PLL, a local PLL, and a synthesis unit. The input unit is configured to generate a division control signal based on an input signal and channel information. The transmission PLL is configured to generate a modulation signal having a frequency of a GHz band, which varies in response to the division control signal. The local PLL is configured to generate a local signal having the GHz band. The synthesis unit is configured to frequency-synthesize the modulation signal and the local signal to output a transmission signal of a MHz band.Type: ApplicationFiled: September 9, 2011Publication date: March 15, 2012Inventors: Jong-Ryul YANG, Hwa-Yeal YU
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Publication number: 20110115566Abstract: A receiver is provided. The receiver includes a differential amplifier amplifying differential input signals input to input terminals and outputting differential output signals through output terminals and an oscillator connected to the output terminals of the differential amplifier. The differential amplifier and the oscillator operate alternatively in response to an enable signal.Type: ApplicationFiled: July 27, 2010Publication date: May 19, 2011Inventors: Hyun Won Moon, Hwa Yeal Yu
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Patent number: 7755439Abstract: A PLL circuit for two point modulation includes a first loop filter, a second loop filter, a plurality of switching devices, and a calibration module. The first loop filter filters an output voltage of a charge pump during a gain calibration operation. The second loop filter filters the output voltage of the charge pump during a normal operation. The first loop filter has a bandwidth wider than that of the second loop filter to perform a fast calibration by reducing a lock time. The operation of the first loop filter, the operation of the second loop filter, and the opening of the first loop filter are determined by the switching operations of the switching devices. The calibration module adjusts a gain of analog modulation data based on a frequency error accumulated in the first loop filter after the first loop filter is open during the gain calibration operation.Type: GrantFiled: November 5, 2008Date of Patent: July 13, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Hwa Yeal Yu, Dong Jin Keum
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Publication number: 20090153254Abstract: A PLL circuit for two point modulation includes a first loop filter, a second loop filter, a plurality of switching devices, and a calibration module. The first loop filter filters an output voltage of a charge pump during a gain calibration operation. The second loop filter filters the output voltage of the charge pump during a normal operation. The first loop filter has a bandwidth wider than that of the second loop filter to perform a fast calibration by reducing a lock time. The operation of the first loop filter, the operation of the second loop filter, and the opening of the first loop filter are determined by the switching operations of the switching devices. The calibration module adjusts a gain of analog modulation data based on a frequency error accumulated in the first loop filter after the first loop filter is open during the gain calibration operation.Type: ApplicationFiled: November 5, 2008Publication date: June 18, 2009Inventors: Hwa Yeal Yu, Dong Jin Keum
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Patent number: 7538703Abstract: A sigma-delta modulator (SDM) includes a delay circuit and an operation circuit. The delay circuit generates multiple clock signals with different delays. The operation circuit includes a plurality of operation stages that operate with timing according to all of the clock signals for high-order sigma-delta modulation. Thus, noise may be dispersed for minimizing noise coupling. The SDM is used to particular advantage within a fractional-N phase-locked loop.Type: GrantFiled: February 7, 2007Date of Patent: May 26, 2009Assignee: Samsung Electronics Co., Ltd.Inventor: Hwa-Yeal Yu