Patents by Inventor Khai Ngo

Khai Ngo 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).

  • Publication number: 20230131668
    Abstract: Disclosed are thiadiazine compounds, derivatives and compositions thereof. The compounds, derivatives, and compositions can be used for treating or preventing a heat-shock protein responsive disorder or suppressing protein aggregation in a subject. The compounds and compositions can also be used for treating cancer, neurodegenerative disorders, and other heat-shock protein responsive disorders.
    Type: Application
    Filed: February 12, 2021
    Publication date: April 27, 2023
    Inventors: Peter Wipf, Linh Khai Ngo, Leila Terrab, Jeffrey L. Brodsky
  • Patent number: 10290587
    Abstract: A power device package includes a dielectric substrate having an upper conductor layer and a lower conductor layer, a semiconductor die coupled to the upper conductor layer of the dielectric substrate via conductive adhesive, a cooler including a protruding hillock having a top surface and outer sides, the lower conductor layer of the dielectric substrate being coupled to the surface of the protruding hillock via an adhesive, and a magnetic material attached mateably around the protruding hillock. The magnetic material includes inner sides abutting the outer sides of the protruding hillock.
    Type: Grant
    Filed: June 14, 2017
    Date of Patent: May 14, 2019
    Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Khai Ngo, Chi-Ming Wang, Han Cui
  • Patent number: 10187050
    Abstract: Aspects of the disclosure provide a power circuit that includes a first switch circuit in parallel with a second switch circuit. The first switch circuit and the second switch circuit are coupled to a first control node, a second control node, a first power node and a second power node via interconnections. The power circuit receives a control signal between the first control node and the second control node to control a current flowing from the first power node to the second power node through the first switch circuit and the second switch circuit. At least one of a first source terminal of the first switch circuit and a second source terminal of the second switch circuit is coupled to the second control node with a resistive element having a specific resistance.
    Type: Grant
    Filed: April 12, 2017
    Date of Patent: January 22, 2019
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Virginia Tech Intellectual Properties, Inc.
    Inventors: Yincan Mao, Chi-Ming Wang, Khai Ngo
  • Patent number: 10116303
    Abstract: A power circuit includes a power source for providing electrical power and two driving transistors being disposed in parallel and receiving electrical power from the power source. Each of the two driving transistors includes a gate terminal, a source connection, and a kelvin source connection. The power circuit also includes a control voltage source having a first terminal and a second terminal. The control voltage source provides a control signal to the two driving transistors for determining driving currents through the two driving transistors. The first terminal is connected to the gate terminals of the two driving transistors, and the second terminal is connected to the kelvin source connections of the two driving transistors. The kelvin source connections of the two driving transistors are inductively coupled.
    Type: Grant
    Filed: July 1, 2016
    Date of Patent: October 30, 2018
    Assignees: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Yincan Mao, Chi-Ming Wang, Zichen Miao, Khai Ngo
  • Publication number: 20180302081
    Abstract: Aspects of the disclosure provide a power circuit that includes a first switch circuit in parallel with a second switch circuit. The first switch circuit and the second switch circuit are coupled to a first control node, a second control node, a first power node and a second power node via interconnections. The power circuit receives a control signal between the first control node and the second control node to control a current flowing from the first power node to the second power node through the first switch circuit and the second switch circuit. At least one of a first source terminal of the first switch circuit and a second source terminal of the second switch circuit is coupled to the second control node with a resistive element having a specific resistance.
    Type: Application
    Filed: April 12, 2017
    Publication date: October 18, 2018
    Applicants: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Yincan MAO, Chi-Ming WANG, Khai NGO
  • Patent number: 9998111
    Abstract: Capacitors connected between gate terminals of a plurality of parallel-connected power transistors are charged and discharged in each switching cycle to provide a plurality of power transistor control waveforms from a single gate driver waveform that equalize power losses/temperatures or steady-state currents among the plurality of power transistors. The capacitors are charged to different voltages by diverting current from one transistor driver by disabling another power transistor driver at different respective times in response to measured transient or steady state current or temperature or other operational parameter.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: June 12, 2018
    Assignee: Virginia Tech Intellectual Properties, Inc.
    Inventors: Khai Ngo, Lujie Zhang, Zichen Miao
  • Publication number: 20180122746
    Abstract: A power device package includes a dielectric substrate having an upper conductor layer and a lower conductor layer, a semiconductor die coupled to the upper conductor layer of the dielectric substrate via conductive adhesive, a cooler including a protruding hillock having a top surface and outer sides, the lower conductor layer of the dielectric substrate being coupled to the surface of the protruding hillock via an adhesive, and a magnetic material attached mateably around the protruding hillock. The magnetic material includes inner sides abutting the outer sides of the protruding hillock.
    Type: Application
    Filed: June 14, 2017
    Publication date: May 3, 2018
    Applicants: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Khai NGO, Chi-Ming WANG, Han CUI
  • Patent number: 9923560
    Abstract: Aspects of the disclosure provide a system having a power circuit. The power circuit includes a first switch circuit having at least a first transistor and a second switch circuit having at least a second transistor. Further, the power circuit includes first interconnections configured to couple the first switch circuit to driving nodes, a source node and a drain node of the power circuit, and second interconnection configured to couple the second switch circuit in parallel to the first switch circuit to the driving nodes, the source node and the drain node of the power circuit. A polarity of unbalance in the first interconnections and the second interconnections dominates a polarity of current unbalance in the first switch circuit and the second switch circuit.
    Type: Grant
    Filed: April 13, 2016
    Date of Patent: March 20, 2018
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Chi-Ming Wang, Yincan Mao, Zichen Miao, Khai Ngo
  • Publication number: 20180006644
    Abstract: A power circuit includes a power source for providing electrical power and two driving transistors being disposed in parallel and receiving electrical power from the power source. Each of the two driving transistors includes a gate terminal, a source connection, and a kelvin source connection. The power circuit also includes a control voltage source having a first terminal and a second terminal. The control voltage source provides a control signal to the two driving transistors for determining driving currents through the two driving transistors. The first terminal is connected to the gate terminals of the two driving transistors, and the second terminal is connected to the kelvin source connections of the two driving transistors. The kelvin source connections of the two driving transistors are inductively coupled.
    Type: Application
    Filed: July 1, 2016
    Publication date: January 4, 2018
    Applicants: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Yincan MAO, Chi-Ming WANG, Zichen MIAO, Khai NGO
  • Publication number: 20170302270
    Abstract: Aspects of the disclosure provide a system having a power circuit. The power circuit includes a first switch circuit having at least a first transistor and a second switch circuit having at least a second transistor. Further, the power circuit includes first interconnections configured to couple the first switch circuit to driving nodes, a source node and a drain node of the power circuit, and second interconnection configured to couple the second switch circuit in parallel to the first switch circuit to the driving nodes, the source node and the drain node of the power circuit. A polarity of unbalance in the first interconnections and the second interconnections dominates a polarity of current unbalance in the first switch circuit and the second switch circuit.
    Type: Application
    Filed: April 13, 2016
    Publication date: October 19, 2017
    Applicants: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Chi-Ming WANG, Yincan MAO, Zichen MIAO, Khai NGO
  • Publication number: 20170179944
    Abstract: Capacitors connected between gate terminals of a plurality of parallel-connected power transistors are charged and discharged in each switching cycle to provide a plurality of power transistor control waveforms from a single gate driver waveform that equalize power losses/temperatures or steady-state currents among the plurality of power transistors. The capacitors are charged to different voltages by diverting current from one transistor driver by disabling another power transistor driver at different respective times in response to measured transient or steady state current or temperature or other operational parameter.
    Type: Application
    Filed: September 29, 2016
    Publication date: June 22, 2017
    Inventors: Khai Ngo, Lujie Zhang, Zichen Miao
  • Patent number: 9660643
    Abstract: Aspects of the disclosure provide a power device that includes an upper power module and a lower power module. The upper power module and the lower power module are coupled in series between two supply voltages, and are respectively controlled by a first control signal and a second control signal. Interconnections of the power device are inductively coupled to prevent reliability issues, such as crosstalk, self turn on, self sustained oscillation, and the like.
    Type: Grant
    Filed: June 9, 2016
    Date of Patent: May 23, 2017
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Virginia Tech Intellectual Properties, Inc.
    Inventors: Chi-Ming Wang, Yincan Mao, Zichen Miao, Khai Ngo
  • Patent number: 9584116
    Abstract: Aspects of the disclosure provide a power circuit that includes a first switch circuit in parallel with a second switch circuit. The first switch circuit and the second switch circuit are coupled to a first driving node, a second driving node, a source node and a drain node via interconnections. The power circuit receives a control signal between the first driving node and the second driving node to control a current flowing from the drain node to the source node through the first switch circuit and the second switch circuit. In the power circuit, a first interconnection and a second interconnection of the interconnections are inductively coupled to balance the current flowing through the first switch circuit and the second switch circuit.
    Type: Grant
    Filed: January 29, 2016
    Date of Patent: February 28, 2017
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., Virginia Tech Intellectual Properties, Inc.
    Inventors: Yincan Mao, Chi-Ming Wang, Zichen Miao, Khai Ngo
  • Patent number: 9531378
    Abstract: Aspects of the disclosure provide a circuit for driving a power switch. The circuit includes a first circuit configured to provide a charging current to charge a control terminal of the power switch, a second circuit configured to provide a discharging current to discharge the control terminal of the power switch, and a control circuit configured to provide control signals to the first circuit and the second circuit to activate/deactivate the first circuit and the second circuit. At least one of the charging current and the discharging current ramps from a first level to a second level at a rate.
    Type: Grant
    Filed: September 3, 2015
    Date of Patent: December 27, 2016
    Assignees: Toyota Motor Engineering & Manufacturing North America, Inc., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Jongwon Shin, Chi-Ming Wang, Khai Ngo
  • Publication number: 20160352330
    Abstract: Aspects of the disclosure provide a power circuit that includes a first switch circuit in parallel with a second switch circuit. The first switch circuit and the second switch circuit are coupled to a first driving node, a second driving node, a source node and a drain node via interconnections. The power circuit receives a control signal between the first driving node and the second driving node to control a current flowing from the drain node to the source node through the first switch circuit and the second switch circuit. In the power circuit, a first interconnection and a second interconnection of the interconnections are inductively coupled to balance the current flowing through the first switch circuit and the second switch circuit.
    Type: Application
    Filed: January 29, 2016
    Publication date: December 1, 2016
    Applicants: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Yincan MAO, Chi-Ming WANG, Zichen MIAO, Khai NGO
  • Publication number: 20160352331
    Abstract: Aspects of the disclosure provide a power device that includes an upper power module and a lower power module. The upper power module and the lower power module are coupled in series between two supply voltages, and are respectively controlled by a first control signal and a second control signal. Interconnections of the power device are inductively coupled to prevent reliability issues, such as crosstalk, self turn on, self sustained oscillation, and the like.
    Type: Application
    Filed: June 9, 2016
    Publication date: December 1, 2016
    Applicants: TOYOTA MOTOR ENGINEERING & MANUFACTURING NORTH AMERICA, INC., VIRGINIA TECH INTELLECTUAL PROPERTIES, INC.
    Inventors: Chi-Ming WANG, Yincan Mao, Zichen Miao, Khai Ngo
  • Patent number: 7975718
    Abstract: The present invention generally provides methods and apparatus for monitoring performance of an injection valve. In one embodiment, a control signal relates to an actuator movement is monitored and correlated to performance of the injection valve.
    Type: Grant
    Filed: April 16, 2007
    Date of Patent: July 12, 2011
    Assignee: Applied Materials, Inc.
    Inventors: Khai Ngo, Son Nguyen, Ernesto Ulloa
  • Patent number: 7775508
    Abstract: A method and apparatus for providing a precursor to a process chamber is described. The apparatus comprises an ampoule capable of receiving either a liquid precursor source material or a solid precursor source material. The ampoule is capable of delivering either a liquid precursor material to a vaporizer coupled to the process chamber, or a vaporized or gaseous precursor material to the process chamber. The ampoule also includes a continuous level sensor to accurately monitor the level of precursor source material within the ampoule.
    Type: Grant
    Filed: October 31, 2006
    Date of Patent: August 17, 2010
    Assignee: Applied Materials, Inc.
    Inventors: Kenric T. Choi, Pravin K. Narwankar, Shreyas S. Kher, Son T. Nguyen, Paul Deaton, Khai Ngo, Paul Chhabra, Alan H. Ouye, Dien-Yeh (Daniel) Wu
  • Publication number: 20100020509
    Abstract: A multi-layer film-stack and method for forming the multilayer film-stack is given where a series of alternating layers of conducting and dielectric materials are deposited such that the conducting layers can be selectively addressed. The use of the method to form integratable high capacitance density capacitors and complete the formation of an integrated power system-on-a-chip device including transistors, conductors, inductors, and capacitors is also given.
    Type: Application
    Filed: April 2, 2007
    Publication date: January 28, 2010
    Applicant: University of Florida Research Foundation, Inc
    Inventors: Huikai Xie, Khai Ngo
  • Publication number: 20080251137
    Abstract: The present invention generally provides methods and apparatus for monitoring performance of an injection valve. In one embodiment, a control signal relates to an actuator movement is monitored and correlated to performance of the injection valve.
    Type: Application
    Filed: April 16, 2007
    Publication date: October 16, 2008
    Inventors: Khai Ngo, Son Nguyen, Ernesto Ulloa