Patents by Inventor Kenneth Chung
Kenneth Chung 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: 20230375641Abstract: A method includes connecting an output of a switched capacitor converter to a battery, the switched capacitor converter comprising a first switch, a second switch, a third switch and an upper circuit connected in series, and a flying capacitor connected between a common node of the first switch and the second switch, and a common node of the third switch and the upper circuit, in a first short circuit testing step, determining whether the third switch is shorted by comparing a voltage on the common node of the third switch and the upper circuit with a first predetermined voltage reference, and in a second short circuit testing step, determining whether the first switch and the second switch are shorted by comparing a voltage on the common node of the first switch and the second switch with a second predetermined voltage reference and a third predetermined voltage reference, respectively.Type: ApplicationFiled: August 3, 2023Publication date: November 23, 2023Applicant: Halo Microelectronics InternationalInventors: Suming Lai, Kenneth Chung-Yin Kwok, Kien Chan Vi, Anan Xiang, Songnan Yang
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Patent number: 11740300Abstract: A method includes connecting an input voltage bus of a switched capacitor converter to a power source through a load switch, in a first short circuit testing step, determining whether the load switch or a second switch is shorted by comparing a voltage on the input voltage bus with a first predetermined voltage reference, after passing the first short circuit testing step, in a second short circuit testing step, determining whether a first switch or a fourth switch is shorted by comparing a voltage on the common node of the third switch and the fourth switch with a second predetermined voltage reference, and after passing the second short circuit testing step, in a third short circuit testing step, determining whether a third switch is shorted by comparing the voltage on the common node of the third switch and the fourth switch with a third predetermined voltage reference.Type: GrantFiled: September 24, 2021Date of Patent: August 29, 2023Assignee: Halo Microelectronics InternationalInventors: Suming Lai, Kenneth Chung-Yin Kwok, Kien Chan Vi
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Publication number: 20230044360Abstract: An apparatus includes a first drain/source region and a second drain/source region surrounded by an isolation ring formed over a substrate, the isolation ring formed being configured to be floating, and a first diode connected between the substrate and the isolation ring, wherein the first diode is a Schottky diode.Type: ApplicationFiled: August 4, 2021Publication date: February 9, 2023Inventors: Lijie Zhao, Kenneth Chung-Yin Kwok, Suming Lai, Zhao Fang
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Publication number: 20230015792Abstract: Gate Drive Apparatus and Control Method for Switched Capacitor Converter A power converter includes a plurality of power switches connected in series between a system ground and an input voltage bus, wherein an upper power switch located between the input voltage bus and an output terminal of the power converter, and immediately adjacent to the output terminal of the power converter is configured as an isolation switch including two back-to-back connected diodes and a bulk terminal, and wherein a connection of the bulk terminal is reconfigurable, and a driver configured to drive the upper power switch immediately adjacent to the output terminal of the power converter.Type: ApplicationFiled: September 20, 2022Publication date: January 19, 2023Inventors: Suming Lai, Kenneth Chung-Yin Kwok
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Patent number: 11482919Abstract: An apparatus includes a first gate drive transistor and a second gate drive transistor connected in series, a common node of the first gate drive transistor and the second gate drive transistor connected to a gate of a power switch, the second gate drive transistor configured as a bulk switch having a bulk terminal connected to a bulk terminal of the power switch, a first auxiliary transistor connected between the bulk terminal and a source of the power switch, a second auxiliary transistor coupled between the gate of the power switch and a system ground, and a third auxiliary transistor coupled between a logic control ground and the system ground, wherein the second auxiliary transistor and the third auxiliary transistor are configured to pull the gate of the power switch and the logic control ground down to the system ground in response to a turn off of the apparatus.Type: GrantFiled: March 22, 2021Date of Patent: October 25, 2022Assignee: Halo Microelectronics InternationalInventors: Suming Lai, Kenneth Chung-Yin Kwok
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Patent number: 11381161Abstract: An example method includes controlling a switching order of a plurality of power switches. The power switches are coupled to a flying capacitor and include parasitic bipolar transistors susceptible to the voltage overstress in response to excess stray inductance of the flying capacitor. The method further includes, in response to the controlled switching order, converting an input voltage of a first voltage level to an output voltage of a second voltage level while mitigating the voltage overstress of the parasitic bipolar transistors of the plurality of power switches.Type: GrantFiled: April 16, 2020Date of Patent: July 5, 2022Assignee: NXP B.V.Inventors: Suming Lai, Kenneth Chung Yin Kwok, Fuchun Zhan
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Publication number: 20220131456Abstract: An apparatus includes a first gate drive transistor and a second gate drive transistor connected in series, a common node of the first gate drive transistor and the second gate drive transistor connected to a gate of a power switch, the second gate drive transistor configured as a bulk switch having a bulk terminal connected to a bulk terminal of the power switch, a first auxiliary transistor connected between the bulk terminal and a source of the power switch, a second auxiliary transistor coupled between the gate of the power switch and a system ground, and a third auxiliary transistor coupled between a logic control ground and the system ground, wherein the second auxiliary transistor and the third auxiliary transistor are configured to pull the gate of the power switch and the logic control ground down to the system ground in response to a turn off of the apparatus.Type: ApplicationFiled: March 22, 2021Publication date: April 28, 2022Inventors: Suming Lai, Kenneth Chung-Yin Kwok
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Publication number: 20220128632Abstract: A method includes connecting an input voltage bus of a switched capacitor converter to a power source through a load switch, in a first short circuit testing step, determining whether the load switch or a second switch is shorted by comparing a voltage on the input voltage bus with a first predetermined voltage reference, after passing the first short circuit testing step, in a second short circuit testing step, determining whether a first switch or a fourth switch is shorted by comparing a voltage on the common node of the third switch and the fourth switch with a second predetermined voltage reference, and after passing the second short circuit testing step, in a third short circuit testing step, determining whether a third switch is shorted by comparing the voltage on the common node of the third switch and the fourth switch with a third predetermined voltage reference.Type: ApplicationFiled: September 24, 2021Publication date: April 28, 2022Inventors: Suming Lai, Kenneth Chung-Yin Kwok, Kien Chan Vi
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Patent number: 11148776Abstract: A tiller system for a marine outboard engine having a tiller bracket is described. The tiller system comprises a tiller for mounting to the tiller bracket. A speed input control is mounted to the tiller and a speed input control position sensor detects a position of the speed input control. A control unit is mounted to the tiller and is operatively connected to the speed input control position sensor. The control unit converts the position of the speed input control into a speed input message. A digital communication port of the control unit transmits the speed input message to the marine outboard engine over a controller area network bus. A marine outboard engine having the tiller system and a marine outboard engine system for a watercraft are also described.Type: GrantFiled: November 15, 2019Date of Patent: October 19, 2021Inventors: Mark J. Skrzypchak, Kenneth Chung
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Publication number: 20210308668Abstract: This disclosure provides for devices and methods for conduction assays for combinatorial libraries. The devices comprise a multiplicity of wells and a removable cap.Type: ApplicationFiled: June 21, 2021Publication date: October 7, 2021Inventors: Kapil Mahakalkar, Kenneth Chung, Jesse Lu, Edgar Gutierrez, Yi Zhang
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Publication number: 20210257907Abstract: An example method includes controlling a switching order of a plurality of power switches. The power switches are coupled to a flying capacitor and include parasitic bipolar transistors susceptible to the voltage overstress in response to excess stray inductance of the flying capacitor. The method further includes, in response to the controlled switching order, converting an input voltage of a first voltage level to an output voltage of a second voltage level while mitigating the voltage overstress of the parasitic bipolar transistors of the plurality of power switches.Type: ApplicationFiled: April 16, 2020Publication date: August 19, 2021Inventors: Suming Lai, Kenneth Chung Yin Kwok, Fuchun Zhan
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Patent number: 11046411Abstract: A tiller assembly includes a base and a tiller arm pivotably connected to the base. One of the base and the tiller arm defines a recess. The recess is at least partially defined by a female tapered surface. A shaft extends through the base and the tiller arm and has a first threaded portion. A clamping fitting is connected to the shaft and received in the recess. The clamping fitting is rotationally fixed relative to another one of the base and the tiller arm and has a male tapered surface. One of a handle and the clamping fitting has a second threaded portion engaged with the first threaded portion. Rotation of the first threaded portion relative to the second threaded portion in a pre-determined direction causes the male tapered surface to press against the female tapered surface. A marine outboard engine and a tiller assembly kit are also provided.Type: GrantFiled: November 28, 2019Date of Patent: June 29, 2021Inventors: Kenneth Chung, Darrell Wiatrowski, Samuel McGinley
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Patent number: 11040343Abstract: This disclosure provides for devices and methods for conducting assays for combinatorial libraries. The devices comprise a multiplicity of wells and a removable cap.Type: GrantFiled: January 28, 2020Date of Patent: June 22, 2021Assignee: Plexium, Inc.Inventors: Kapil Mahakalkar, Kenneth Chung, Jesse Lu, Edgar Gutierrez, Yi Zhang
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Patent number: 10997260Abstract: A moderation framework monitors content posted in a database network and uses a declarative configuration scheme that defines moderation rules without having to write new software. A user interface operated by the moderation platform allows selection of different user criteria and different content criteria for triggering the moderation rules. The user interface also provides selectable actions for the moderation rules to apply when the content matches the selected user and content criteria. The user interface also allows selection of different entities for associating with different moderation rules, such as accounts, cases, opportunities, ChatterĀ® feed posts, or custom objects defined by customers.Type: GrantFiled: September 26, 2019Date of Patent: May 4, 2021Assignee: SALESFORCE.COM, INC.Inventors: Ashley Mcguire, Joshua Luft-Glidden, Kenneth Chung Kay Ko, Rupali Jagtap, Sanjaya Lai, Volodymyr Ivanov
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Patent number: 10942903Abstract: Some external users in a public on-line community may post excessive numbers of items, causing annoyance to others and unnecessary loading on database resources. A robust moderation framework enables an individual community moderator or admin to specify a set of rules and actions to mitigate this problem. Scalable, performant rate limiting rules employ windowed counters, separately for each rule, with the counters maintained in cache memory resources outside the main database.Type: GrantFiled: May 29, 2019Date of Patent: March 9, 2021Assignee: SALESFORCE.COM, INC.Inventors: Kenneth Chung Kay Ko, Joshua Luft-Glidden, Lucas Pfister
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Patent number: 10826482Abstract: Aspects of the present disclosure are directed to circuitry to control a gate voltage. As may be implemented in accordance with one or more embodiments, a voltage level is controlled for a field effect transistor (FET) having a floating gate and a target operating voltage above which the FET would be overcharged and around which the FET has a nominal operating range. Pulse circuitry is configured to apply energy to the floating gate in pulses, in operation the applied energy being pulsed low relative to the gate's target operating voltage, and then being changed by adjusting successive pulses until the gate reaches the target operating voltage. A feedback circuit samples a voltage level of, and enables the pulse circuitry to apply pulsed energy to, the floating gate for directing operation of the FET based on the target operating voltage in the nominal operating range.Type: GrantFiled: April 16, 2020Date of Patent: November 3, 2020Assignee: NXP B.V.Inventors: Kenneth Chung Yin Kwok, Suming Lai, Xuechu Li, Fuchun Zhan, Jian Qing
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Patent number: 10769632Abstract: A phone-based electronic wallet providing authenticated transactions across multiple channels of commerce. The electronic wallet may be used for point-of-sale payments, remote mobile payments and/or web-based payments, and may use authentication tools such as offline PINs, SecureCode PINs and/or online PINs.Type: GrantFiled: April 6, 2017Date of Patent: September 8, 2020Assignee: MASTERCARD INTERNATIONAL INCORPORATEDInventors: Shoon Ping Wong, Kenneth Chung Lem Moy, Celine Martig, Pablo Fourez, Alan Mushing, Fredrik Lundequist, Michael Ameiss, Michael Shaon
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Patent number: 10723429Abstract: A tiller system has a tiller adapted for steering at least one of a bracket assembly and a motor assembly of a marine outboard motor having a power steering system, a throttle control mounted to the tiller, an electronic torque sensor, and a tiller system control module (TSCM) in electronic communication with the electronic torque sensor. The electronic torque sensor senses torque applied to the tiller and outputs an electronic steering signal as a function of the torque. The TSCM receives the electronic steering signal and controls an operation of the power steering system in response to the electronic steering signal. A method for steering a marine outboard motor, and a marine outboard motor having a tiller system are also described.Type: GrantFiled: January 30, 2019Date of Patent: July 28, 2020Assignee: BRP US INC.Inventors: Darrell Wiatrowski, Benjamin Jones, Mark J. Skrzypchak, Kenneth Chung
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Publication number: 20200172220Abstract: A tiller assembly includes a base and a tiller arm pivotably connected to the base. One of the base and the tiller arm defines a recess. The recess is at least partially defined by a female tapered surface. A shaft extends through the base and the tiller arm and has a first threaded portion. A clamping fitting is connected to the shaft and received in the recess. The clamping fitting is rotationally fixed relative to another one of the base and the tiller arm and has a male tapered surface. One of a handle and the clamping fitting has a second threaded portion engaged with the first threaded portion. Rotation of the first threaded portion relative to the second threaded portion in a pre-determined direction causes the male tapered surface to press against the female tapered surface. A marine outboard engine and a tiller assembly kit are also provided.Type: ApplicationFiled: November 28, 2019Publication date: June 4, 2020Inventors: Kenneth CHUNG, Darrell Wiatrowski, Samuel McGinley
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Publication number: 20200156751Abstract: A tiller system for a marine outboard engine having a tiller bracket is described. The tiller system comprises a tiller for mounting to the tiller bracket. A speed input control is mounted to the tiller and a speed input control position sensor detects a position of the speed input control. A control unit is mounted to the tiller and is operatively connected to the speed input control position sensor. The control unit converts the position of the speed input control into a speed input message. A digital communication port of the control unit transmits the speed input message to the marine outboard engine over a controller area network bus. A marine outboard engine having the tiller system and a marine outboard engine system for a watercraft are also described.Type: ApplicationFiled: November 15, 2019Publication date: May 21, 2020Inventors: Mark J. SKRZYPCHAK, Kenneth CHUNG