Patents by Inventor Kong-Yin Leong
Kong-Yin Leong 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: 10622892Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.Type: GrantFiled: May 7, 2019Date of Patent: April 14, 2020Assignee: STMicroelectronics Asia Pacific Pte LtdInventor: Kong Yin Leong
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Publication number: 20190267899Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.Type: ApplicationFiled: May 7, 2019Publication date: August 29, 2019Inventor: Kong Yin LEONG
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Patent number: 10326367Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.Type: GrantFiled: June 8, 2018Date of Patent: June 18, 2019Assignee: STMicroelectronics Asia Pacific Pte LtdInventor: Kong Yin Leong
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Publication number: 20180294722Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.Type: ApplicationFiled: June 8, 2018Publication date: October 11, 2018Inventor: Kong Yin LEONG
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Patent number: 10008933Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.Type: GrantFiled: December 16, 2016Date of Patent: June 26, 2018Assignee: STMICROELECTRONICS ASIA PACIFIC PTE LTDInventor: Kong Yin Leong
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Publication number: 20180175730Abstract: The amount of power being output to the load is sensed by sampling the frequency of the pulse width modulation signal that is controlling the switch that is providing the power to the load. If the pulse width modulation signal has a high frequency, then it will be providing higher power to the load. As the power drawn by the load decreases, the frequency of the pulse width modulation power supply signal will decrease. By sensing and periodically sampling the frequency of the pulse width modulation signal that is providing power, the demand of the load can be quickly and accurately determined. As the power demand of the load decreases, the peak current that the power supply switch can provide also decreases. The permitted peak current dynamically changes to adapt to the power drawn by the load.Type: ApplicationFiled: December 16, 2016Publication date: June 21, 2018Inventor: Kong Yin LEONG
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Patent number: 9876450Abstract: An apparatus includes a clamp control circuit configured to control a first current to have a magnitude substantially equal to that of a second current when the second current has a first flow direction. The clamp control circuit is configured to control the first current to be substantially zero when the second current has a second flow direction. A method includes determining a value of a first current, controlling a second current to have a substantially zero value when the first current flows in a first direction, and controlling the second current to have a magnitude substantially equal to that of the first current when the first current flows in a second direction. The first current flows in the first direction when a winding of a motor is being supplied with energy and flows in the second direction when the winding of the motor is discharging energy.Type: GrantFiled: January 23, 2015Date of Patent: January 23, 2018Assignee: Marvell World Trade, Ltd.Inventors: Yichao Wang, Ravishanker Krishnamoorthy, Kong Yin Leong
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Patent number: 9787227Abstract: An apparatus includes a driver circuit and a motor control circuit. The driver receives first and second supply voltages and a control signal, and generates a target voltage on an output terminal according to the control signal. The motor control circuit is configured to generate the control signal and measure a rise time of a current of the driver circuit during a period of time in which the output terminal is at the target voltage. A method includes, during a time interval, providing the first supply voltage on an output of a first driver circuit, generating a target voltage on an output of a second driver circuit, and measuring a rise time of a current flowing between the outputs of the first and second driver circuits. For both the apparatus and method, the target voltage is between and substantially different from the first and second supply voltages.Type: GrantFiled: January 19, 2015Date of Patent: October 10, 2017Assignee: Marvell International Ltd.Inventors: Yichao Wang, Kong Yin Leong, Ravishanker Krishnamoorthy
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Publication number: 20150214874Abstract: An apparatus includes a clamp control circuit configured to control a first current to have a magnitude substantially equal to that of a second current when the second current has a first flow direction. The clamp control circuit is configured to control the first current to be substantially zero when the second current has a second flow direction. A method includes determining a value of a first current, controlling a second current to have a substantially zero value when the first current flows in a first direction, and controlling the second current to have a magnitude substantially equal to that of the first current when the first current flows in a second direction. The first current flows in the first direction when a winding of a motor is being supplied with energy and flows in the second direction when the winding of the motor is discharging energy.Type: ApplicationFiled: January 23, 2015Publication date: July 30, 2015Inventors: Yichao WANG, Ravishanker KRISHNAMOORTHY, Kong Yin LEONG
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Patent number: 8232790Abstract: A dual supply circuit uses a dual feedback control, single inductor, dual polarity boost architecture with a low side power FET for end of current recirculation sensing. A dual feedback system tracks the output voltage variations and a low side power FET end of current recirculation sensing utilizes the internal current limit sensing system. Logic defining the state of operations allows the regulator to operate in both single and dual mode to cater to wide application ranges. The positive boost regulator can be operated in a buck mode making the output voltage constant with high input supply.Type: GrantFiled: October 15, 2009Date of Patent: July 31, 2012Assignee: STMicroelectronics Asia Pacific Pte Ltd.Inventors: Kong Yin Leong, Soon Hwei Tan
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Publication number: 20110089920Abstract: A dual supply circuit uses a dual feedback control, single inductor, dual polarity boost architecture with a low side power FET for end of current recirculation sensing. A dual feedback system tracks the output voltage variations and a low side power FET end of current recirculation sensing utilizes the internal current limit sensing system. Logic defining the state of operations allows the regulator to operate in both single and dual mode to cater to wide application ranges. The positive boost regulator can be operated in a buck mode making the output voltage constant with high input supply.Type: ApplicationFiled: October 15, 2009Publication date: April 21, 2011Applicant: STMicroelectronics Asia Pacific Pte Ltd.Inventors: Kong Yin Leong, Soon Hwei Tan
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Patent number: 7638982Abstract: A switched capacitor regulator in accordance with the present invention comprises a DC voltage source, a plurality of switches, a pumping capacitor, and a load capacitor. The plurality of switches may comprise semiconductor switches implemented in an integrated circuit (IC). The plurality of switches is configured to operate the switched capacitor regulator to place the regulator into a first charging stage and, alternately, a second charging stage. The switching between the first stage and the second stage results in the pumping capacitor being charged in opposing directions, while the load capacitor is always being charged in the same direction. The load capacitor is thus being charged in both the first charging stage and the second charging stage.Type: GrantFiled: September 13, 2006Date of Patent: December 29, 2009Assignee: STMicroelectronics Asia Pacific Pte. Ltd.Inventors: Kong-Yin Leong, Ravi Shanker
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Publication number: 20070210781Abstract: A switched capacitor regulator in accordance with the present invention comprises a DC voltage source, a plurality of switches, a pumping capacitor, and a load capacitor. The plurality of switches may comprise semiconductor switches implemented in an integrated circuit (IC). The plurality of switches is configured to operate the switched capacitor regulator to place the regulator into a first charging stage and, alternately, a second charging stage. The switching between the first stage and the second stage results in the pumping capacitor being charged in opposing directions, while the load capacitor is always being charged in the same direction. The load capacitor is thus being charged in both the first charging stage and the second charging stage.Type: ApplicationFiled: September 13, 2006Publication date: September 13, 2007Applicant: STMicroelectronics Asia Pacific PTE LtdInventors: Kong-Yin Leong, Ravi Shanker