Patents by Inventor Chang Choe
Chang Choe 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: 12272705Abstract: An image sensor is provided and may include a semiconductor substrate having a surface and including trench, the trench extending from the surface into the semiconductor substrate, an insulating pattern provided in the trench; and a doped region in the semiconductor substrate and on the insulating patterns. The doped region includes a side portion on a side surface of the insulating pattern, and a bottom portion on a bottom surface of the insulating pattern. A thickness of the side portion of the doped region is from 85% to 115% of a thickness of the bottom portion of the doped region, and a number of dopants per unit area in the side portion of the doped region is from 85% to 115% of a number of dopants per unit area in the bottom portion.Type: GrantFiled: April 23, 2021Date of Patent: April 8, 2025Assignee: SAMSUNG ELECTRONICS CO., LTD.Inventors: Kook Tae Kim, Chang Kyu Lee, Dongmo Im, Ju-eun Kim, Miseon Park, Jungim Choe, Soojin Hong
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Patent number: 10641802Abstract: Systems and methods described herein provide a current sensor having fault detection circuitry configured to detect over-current and/or current faults corresponding to current through a conductor being greater than a predetermined level. The current sensor can include a shared signal path, a main signal path, and a fault detection signal path to perform both fault detection and current detection signal processing. The current sensor can include one or more magnetic field sensing elements configured to generate a magnetic field signal indicative of the current through the conductor, an analog-to-digital converter (ADC) configured to receive the magnetic field signal and convert the magnetic field signal into a digital signal, and a fault detector responsive to the digital signal to generate a fault signal indicative of the current through the conductor being greater than a predetermined level.Type: GrantFiled: March 22, 2018Date of Patent: May 5, 2020Assignee: Allegro MicroSystems, LLCInventors: Craig S. Petrie, Soo-Chang Choe, Cory Voisine
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Patent number: 10644659Abstract: A buffer amplifier comprises a source follower and a feedback amplifier. The feedback amplifier may be configured to control a drain current of the source follower to remain substantially constant independent of a load.Type: GrantFiled: August 24, 2018Date of Patent: May 5, 2020Assignee: Allegro MicroSystems, LLCInventors: Soo-Chang Choe, Craig S. Petrie
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Publication number: 20200067467Abstract: A buffer amplifier comprises a source follower and a feedback amplifier. The feedback amplifier may be configured to control a drain current of the source follower to remain substantially constant independent of a load.Type: ApplicationFiled: August 24, 2018Publication date: February 27, 2020Applicant: Allegro MicroSystems, LLCInventors: Soo-Chang Choe, Craig S. Petrie
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Publication number: 20190293694Abstract: Systems and methods described herein provide a current sensor having fault detection circuitry configured to detect over-current and/or current faults corresponding to current through a conductor being greater than a predetermined level. The current sensor can include a shared signal path, a main signal path, and a fault detection signal path to perform both fault detection and current detection signal processing. The current sensor can include one or more magnetic field sensing elements configured to generate a magnetic field signal indicative of the current through the conductor, an analog-to-digital converter (ADC) configured to receive the magnetic field signal and convert the magnetic field signal into a digital signal, and a fault detector responsive to the digital signal to generate a fault signal indicative of the current through the conductor being greater than a predetermined level.Type: ApplicationFiled: March 22, 2018Publication date: September 26, 2019Applicant: Allegro MicroSystems, LLCInventors: Craig S. Petrie, Soo-Chang Choe, Cory Voisine
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Patent number: 10001519Abstract: A ground fault detection circuit is configured to detect a ground fault in a circuit or system that has more than one ground reference. In an embodiment, an electronic circuit includes a first circuit coupled to a first ground node. The first ground node is coupled to a first ground reference. The electronic circuit also includes a second circuit coupled to a second ground node. The second ground node is coupled to a second ground reference. The ground fault detection circuit is configured to detect an open circuit between the first ground node and the first ground reference or between the second ground node and the second ground reference by comparing a voltage at the first ground node to a voltage at the second ground reference or comparing a voltage at the second ground node to a voltage at the first ground reference.Type: GrantFiled: June 12, 2015Date of Patent: June 19, 2018Assignee: Allegro MicroSystems, LLCInventors: Soo-Chang Choe, Craig Petrie
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Patent number: 9804249Abstract: Methods and apparatus for processing a signal comprise at least one circuit configured to generate a measured signal during a measured time period and a reference signal during a reference time period. Also included is at least one dual- or multi-path analog-to-digital converter comprising at least a first processing circuit configured to process the measured signal, at least a second processing circuit configured to process the reference signal, and a third processing circuit configured to process both the measured signal and the reference signal.Type: GrantFiled: November 14, 2014Date of Patent: October 31, 2017Assignee: Allegro MicroSystems, LLCInventors: Craig S. Petrie, Soo-Chang Choe
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Publication number: 20160363620Abstract: A ground fault detection circuit is configured to detect a ground fault in a circuit or system that has more than one ground reference. In an embodiment, an electronic circuit includes a first circuit coupled to a first ground node. The first ground node is coupled to a first ground reference. The electronic circuit also includes a second circuit coupled to a second ground node. The second ground node is coupled to a second ground reference. The ground fault detection circuit is configured to detect an open circuit between the first ground node and the first ground reference or between the second ground node and the second ground reference by comparing a voltage at the first ground node to a voltage at the second ground reference or comparing a voltage at the second ground node to a voltage at the first ground reference.Type: ApplicationFiled: June 12, 2015Publication date: December 15, 2016Applicant: ALLEGRO MICROSYSTEMS, LLCInventors: Soo-Chang Choe, Craig Petrie
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Publication number: 20160139229Abstract: Methods and apparatus for processing a signal comprise at least one circuit configured to generate a measured signal during a measured time period and a reference signal during a reference time period. Also included is at least one dual- or multi-path analog-to-digital converter comprising at least a first processing circuit configured to process the measured signal, at least a second processing circuit configured to process the reference signal, and a third processing circuit configured to process both the measured signal and the reference signal.Type: ApplicationFiled: November 14, 2014Publication date: May 19, 2016Applicant: Allegro MicroSystems, LLCInventors: Craig S. Petrie, Soo-Chang Choe
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Patent number: 7840614Abstract: An application program interface (API) embodied on one or more computer readable media, comprising a first group of services related to integrating content repositories into virtual content repositories (VCRs), a second group of services related to manipulating information in VCRs, a third group of services related to searching VCRs, a forth group of services related to configuring VCRs, and wherein the application program interface is compatible with a content repository service provider interface (SPI).Type: GrantFiled: July 11, 2003Date of Patent: November 23, 2010Assignee: Bea Systems, Inc.Inventors: James Owen, Joseph Conti, Chang Choe, Jalpesh Patadia, Gregory Smith
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Patent number: 7483904Abstract: A memory for storing data for access by an application program being executed on a computer system, comprising a data structure stored in said memory, the data structure including or referring to a name, a content repository identifier, a property, a property definition, and wherein the data structure is logically part of a virtual content repository (VCR), and wherein the VCR represents at least one content repository.Type: GrantFiled: July 11, 2003Date of Patent: January 27, 2009Assignee: BEA Systems, Inc.Inventors: James Owen, Chang Choe
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Patent number: 7415478Abstract: A memory for storing data for access by an application program being executed on a computer system, comprising a data structure stored in said memory, the data structure including or referring to: a name, a content repository identifier, a plurality of properties, a plurality of property definitions associated with the plurality of properties, and wherein the data structure is logically part of a virtual content repository (VCR), and wherein the VCR represents at least one content repository.Type: GrantFiled: July 11, 2003Date of Patent: August 19, 2008Assignee: BEA Systems, Inc.Inventors: James Owen, Chang Choe
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Publication number: 20040167920Abstract: A memory for storing data for access by an application program being executed on a computer system, comprising a data structure stored in said memory, the data structure including or referring to a name, a content repository identifier, a property, a property definition, and wherein the data structure is logically part of a virtual content repository (VCR), and wherein the VCR represents at least one content repository.Type: ApplicationFiled: July 11, 2003Publication date: August 26, 2004Applicant: BEA Systems, Inc.Inventors: James Owen, Chang Choe
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Publication number: 20040167867Abstract: An application program interface (API) embodied on one or more computer readable media, comprising a first group of services related to integrating content repositories into virtual content repositories (VCRs), a second group of services related to manipulating information in VCRs, a third group of services related to searching VCRs, a forth group of services related to configuring VCRs, and wherein the application program interface is compatible with a content repository service provider interface (SPI).Type: ApplicationFiled: July 11, 2003Publication date: August 26, 2004Applicant: BEA Systems, Inc.Inventors: James Owen, Joseph Conti, Chang Choe, Jalpesh Patadia, Gregory Smith
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Publication number: 20040167900Abstract: A memory for storing data for access by an application program being executed on a computer system, comprising a data structure stored in said memory, the data structure including or referring to: a name, a content repository identifier, a plurality of properties, a plurality of property definitions associated with the plurality of properties, and wherein the data structure is logically part of a virtual content repository (VCR), and wherein the VCR represents at least one content repository.Type: ApplicationFiled: July 11, 2003Publication date: August 26, 2004Applicant: BEA Systems, Inc.Inventors: James Owen, Chang Choe