Patents by Inventor Jung-Wook Heo
Jung-Wook Heo 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: 20230291211Abstract: A charger integrated circuit for charging a battery device including a first battery and a second battery connected to each other in series. The charger integrated circuit includes a first charger to be connected to a connection node between the first and second batteries, a second charger to be connected between the input voltage terminal and a high voltage terminal of the battery device, and a balancing circuit to balance voltages of the first and second batteries. The first charger is to provide a first charge current to the connection node in a first charge mode. The second charger is to directly charge the battery device by providing a second charge current to the high voltage terminal in a second charge mode.Type: ApplicationFiled: May 18, 2023Publication date: September 14, 2023Inventors: Sung-woo LEE, Sang-bin MOON, Hyoung-seok OH, Jung-wook HEO
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Patent number: 11664666Abstract: A charger integrated circuit for charging a battery device including a first battery and a second battery connected to each other in series. The charger integrated circuit includes a first charger to be connected to a connection node between the first and second batteries, a second charger to be connected between the input voltage terminal and a high voltage terminal of the battery device, and a balancing circuit to balance voltages of the first and second batteries. The first charger is to provide a first charge current to the connection node in a first charge mode. The second charger is to directly charge the battery device by providing a second charge current to the high voltage terminal in a second charge mode.Type: GrantFiled: May 27, 2022Date of Patent: May 30, 2023Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-woo Lee, Sang-bin Moon, Hyoung-seok Oh, Jung-wook Heo
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Publication number: 20220294234Abstract: A charger integrated circuit for charging a battery device including a first battery and a second battery connected to each other in series. The charger integrated circuit includes a first charger to be connected to a connection node between the first and second batteries, a second charger to be connected between the input voltage terminal and a high voltage terminal of the battery device, and a balancing circuit to balance voltages of the first and second batteries. The first charger is to provide a first charge current to the connection node in a first charge mode. The second charger is to directly charge the battery device by providing a second charge current to the high voltage terminal in a second charge mode.Type: ApplicationFiled: May 27, 2022Publication date: September 15, 2022Inventors: Sung-woo LEE, Sang-bin MOON, Hyoung-seok OH, Jung-wook HEO
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Patent number: 11349317Abstract: A charger integrated circuit for charging a battery device including a first battery and a second battery connected to each other in series. The charger integrated circuit includes a first charger to be connected to a connection node between the first and second batteries, a second charger to be connected between the input voltage terminal and a high voltage terminal of the battery device, and a balancing circuit to balance voltages of the first and second batteries. The first charger is to provide a first charge current to the connection node in a first charge mode. The second charger is to directly charge the battery device by providing a second charge current to the high voltage terminal in a second charge mode.Type: GrantFiled: August 13, 2019Date of Patent: May 31, 2022Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-woo Lee, Sang-bin Moon, Hyoung-seok Oh, Jung-wook Heo
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Patent number: 11170360Abstract: A magnetic secure transmission system includes an inductor, a switching circuit connected to the inductor, and a control circuit. The control circuit controls the switching circuit to adjust a level of a current in the inductor by a first amount over a data transmission period, such that the inductor emits a magnetic pulse including a first magnitude during the data transmission period. The control circuit controls the switching circuit to adjust the level of the current in the inductor such that the level of the current is increased and decreased repeatedly by a second amount between two different levels during a data non-transmission period, and the inductor emits a magnetic pulse including a second magnitude during the data non-transmission period. The second amount is less than the first amount, the first magnitude is greater than a threshold value and the second magnitude is less than the threshold value.Type: GrantFiled: September 23, 2019Date of Patent: November 9, 2021Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-Woo Lee, Hyoung-Seok Oh, Sang-Hee Kang, Kwang-Chan Lee, Dae-Woong Cho, Jung-Wook Heo
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Patent number: 10903676Abstract: The semiconductor device including first and second transistors configured to provide a first voltage to a first node, the first voltage being a voltage provided from a travel adaptor (TA), a third transistor connected in series with the second transistor and configured to provide a ground voltage to the first node, and a fourth transistor configured to receive a second voltage from a first inductor connected to the first node, and provide the second voltage to a second node as a third voltage for charging a battery connected thereto may be provided.Type: GrantFiled: January 11, 2018Date of Patent: January 26, 2021Assignee: Samsung Electronics Co., Ltd.Inventors: Sung Kyu Cho, Hyoung Seok Oh, Kwang Chan Lee, Dae Woong Cho, Jung Wook Heo
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Publication number: 20200144829Abstract: A charger integrated circuit for charging a battery device including a first battery and a second battery connected to each other in series. The charger integrated circuit includes a first charger to be connected to a connection node between the first and second batteries, a second charger to be connected between the input voltage terminal and a high voltage terminal of the battery device, and a balancing circuit to balance voltages of the first and second batteries. The first charger is to provide a first charge current to the connection node in a first charge mode. The second charger is to directly charge the battery device by providing a second charge current to the high voltage terminal in a second charge mode.Type: ApplicationFiled: August 13, 2019Publication date: May 7, 2020Inventors: Sung-woo LEE, Sang-bin MOON, Hyoung-seok OH, Jung-wook HEO
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Publication number: 20200019955Abstract: A magnetic secure transmission system includes an inductor, a switching circuit connected to the inductor, and a control circuit. The control circuit controls the switching circuit to adjust a level of a current in the inductor by a first amount over a data transmission period, such that the inductor emits a magnetic pulse including a first magnitude during the data transmission period. The control circuit controls the switching circuit to adjust the level of the current in the inductor such that the level of the current is increased and decreased repeatedly by a second amount between two different levels during a data non-transmission period, and the inductor emits a magnetic pulse including a second magnitude during the data non-transmission period. The second amount is less than the first amount, the first magnitude is greater than a threshold value and the second magnitude is less than the threshold value.Type: ApplicationFiled: September 23, 2019Publication date: January 16, 2020Applicant: Samsung Electronics Co., Ltd.Inventors: Sung-Woo Lee, Hyoung-Seok Oh, Sang-Hee Kang, Kwang-Chan Lee, Dae-Woong Cho, Jung-Wook Heo
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Patent number: 10430701Abstract: A magnetic secure transmission (MST) system includes a switching circuit, an inductor, and a control circuit. The control circuit is configured to control the switching circuit to adjust a level of current in the inductor. The inductor current may be adjusted by a first amount over a data transmission period such that the inductor emits a magnetic pulse including a first magnitude. The inductor current may be kept constant during a first sub-period of a data non-transmission period and may be changed by a second amount at a constant slope during a second sub-period of the data non-transmission period, such that the inductor emits a magnetic pulse including a second magnitude during the second sub-period of the data non-transmission period. The second amount is less than the first amount. The first magnitude is greater than a threshold value. The second magnitude is less than the threshold value.Type: GrantFiled: February 7, 2017Date of Patent: October 1, 2019Assignee: Samsung Electronics Co., Ltd.Inventors: Sung-Woo Lee, Hyoung-Seok Oh, Sang-Hee Kang, Kwang-Chan Lee, Dae-Woong Cho, Jung-Wook Heo
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Publication number: 20180301911Abstract: The semiconductor device including first and second transistors configured to provide a first voltage to a first node, the first voltage being a voltage provided from a travel adaptor (TA), a third transistor connected in series with the second transistor and configured to provide a ground voltage to the first node, and a fourth transistor configured to receive a second voltage from a first inductor connected to the first node, and provide the second voltage to a second node as a third voltage for charging a battery connected thereto may be provided.Type: ApplicationFiled: January 11, 2018Publication date: October 18, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Sung Kyu CHO, Hyoung seok OH, Kwang Chan LEE, Dae Woong CHO, Jung Wook HEO
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Patent number: 9899918Abstract: In a DC/DC converter, a driving method thereof, and a power supply using the same, the DC/DC converter includes a plurality of power switches connected as a serial string between an input terminal and a ground terminal, a first capacitor connected to at least two power switches of the serial string in parallel, an inductor connected between an intermediate node of the serial string and an output terminal, a second capacitor connected between the output terminal and the ground terminal, and a plurality of drivers configured to generate a switching control signal for each of the plurality of power switches. A voltage having no correlation with a voltage of the input terminal is supplied to a power terminal of each of the plurality of drivers.Type: GrantFiled: January 22, 2016Date of Patent: February 20, 2018Assignee: Samsung Electronics Co., Ltd.Inventors: Kwang-chan Lee, Sung-woo Lee, Sang-hee Kang, Jung-wook Heo
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Publication number: 20180032850Abstract: A magnetic secure transmission (MST) system includes a switching circuit, an inductor, and a control circuit. The control circuit is configured to control the switching circuit to adjust a level of current in the inductor. The inductor current may be adjusted by a first amount over a data transmission period such that the inductor emits a magnetic pulse including a first magnitude. The inductor current may be kept constant during a first sub-period of a data non-transmission period and may be changed by a second amount at a constant slope during a second sub-period of the data non-transmission period, such that the inductor emits a magnetic pulse including a second magnitude during the second sub-period of the data non-transmission period. The second amount is less than the first amount. The first magnitude is greater than a threshold value. The second magnitude is less than the threshold value.Type: ApplicationFiled: February 7, 2017Publication date: February 1, 2018Applicant: Samsung Electronics Co., Ltd.Inventors: Sung-Woo LEE, Hyoung-Seok OH, Sang-Hee KANG, Kwang-Chan LEE, Dae-Woong CHO, Jung-Wook HEO
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Publication number: 20160315539Abstract: In a DC/DC converter, a driving method thereof, and a power supply using the same, the DC/DC converter includes a plurality of power switches connected as a serial string between an input terminal and a ground terminal, a first capacitor connected to at least two power switches of the serial string in parallel, an inductor connected between an intermediate node of the serial string and an output terminal, a second capacitor connected between the output terminal and the ground terminal, and a plurality of drivers configured to generate a switching control signal for each of the plurality of power switches. A voltage having no correlation with a voltage of the input terminal is supplied to a power terminal of each of the plurality of drivers.Type: ApplicationFiled: January 22, 2016Publication date: October 27, 2016Inventors: Kwang-chan Lee, Sung-woo Lee, Sang-hee Kang, Jung-wook Heo
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Patent number: 7860468Abstract: A programmable variable gain amplifier includes at least three amplifiers. A first amplifier is configured to amplify an input signal. A second amplifier, which includes a programmable output load stage, is configured to receive an output signal from the first amplifier and to output a first differential output signal. The output load stage includes multiple first switches and multiple first diode-connected transistors that are open-circuited or short-circuited by the first switches. A third amplifier, which includes a programmable current mirror input stage, is configured to receive the first differential output signal from the second amplifier through the current mirror input stage and to output a second differential output signal. The current mirror input stage includes multiple second switches and multiple second transistors that are open-circuited or short-circuited by the plurality of second switches.Type: GrantFiled: November 1, 2007Date of Patent: December 28, 2010Assignee: Samsung Electronics Co., Ltd.Inventors: Il-Ku Nam, Byeong-Ha Park, Jong-Dae Bae, Jung-Wook Heo, Ho-Jung Ju, Hyun-Won Mun, Jeong-Hyun Choi
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Publication number: 20080119154Abstract: A programmable variable gain amplifier includes at least three amplifiers. A first amplifier is configured to amplify an input signal. A second amplifier, which includes a programmable output load stage, is configured to receive an output signal from the first amplifier and to output a first differential output signal. The output load stage includes multiple first switches and multiple first diode-connected transistors that are open-circuited or short-circuited by the first switches. A third amplifier, which includes a programmable current mirror input stage, is configured to receive the first differential output signal from the second amplifier through the current mirror input stage and to output a second differential output signal. The current mirror input stage includes multiple second switches and multiple second transistors that are open-circuited or short-circuited by the plurality of second switches.Type: ApplicationFiled: November 1, 2007Publication date: May 22, 2008Applicant: Samsung Electronics Co., Ltd.Inventors: Il-Ku NAM, Byeong-Ha PARK, Jong-Dae BAE, Jung-Wook HEO, Ho-Jung JU, Hyun-Won MUN, Jeong-Hyun CHOI