Patents by Inventor James Hung Nguyen

James Hung Nguyen 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).

  • Patent number: 10652036
    Abstract: Techniques for bridging communication between multiple networks to facilitate distribution of multicast data are described herein. For example, a node that is able to communicate with its network and an adjacent network may send a subscription message indicating that the node is a member of a multicast group. The subscription message may be forwarded up both networks. The node may then forward, between the networks, data that is destined for members of the multicast group.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: May 12, 2020
    Assignee: Itron, Inc.
    Inventors: Jerome Bartier, James Laurence Taylor, Viet-Hung Nguyen, Hartman Van Wyk
  • Publication number: 20200099543
    Abstract: Techniques for connecting networks to facilitate distribution of data are described. For example, to distribute multicast data to members of a multicast group that span multiple networks, the techniques may identify a path between networks that each have a member of the multicast group, such as a shortest path between networks. The techniques may inform the networks on the path to establish a connection with an adjacent network. This may allow multicast data for a multicast group to be distributed to members of the multicast group that are located in separate networks.
    Type: Application
    Filed: September 26, 2018
    Publication date: March 26, 2020
    Inventors: James Laurence Taylor, Jerome Bartier, Viet-Hung Nguyen
  • Publication number: 20200099616
    Abstract: Source routing techniques include sending data across several networks, while limiting source routing overhead. For example, the source routing techniques may use a first address format to route data to nodes along a routing path that are within a first network where a source node is located, and use a second address format to route the data to a node along the routing path that is within a second, different network. The node in the second network may similarly route the data through the second network using the first address format for nodes within the second network and, if needed, route the data to a node within a third network using the second address format. This may be repeated for any number of networks to reach a destination.
    Type: Application
    Filed: September 26, 2018
    Publication date: March 26, 2020
    Inventors: Viet-Hung Nguyen, Jerome Bartier, James Laurence Taylor
  • Patent number: 10491411
    Abstract: Techniques for limiting forwarding of multicast communications are described herein. For example, the techniques intelligently forward data along paths of a network where members of a multicast group are located. As such, nodes that do not lead to members of the multicast group may be pruned from distribution of the data. This reduces network communications, ultimately conserving processing, communication, and/or battery resources of the nodes.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: November 26, 2019
    Assignee: Itron, Inc.
    Inventors: Jerome Bartier, James Laurence Taylor, Viet-Hung Nguyen
  • Patent number: 10419231
    Abstract: Techniques for bridging communication between multiple networks to facilitate distribution of multicast data are described herein. For example, the techniques may identify a particular node that is able to communicate with each network and instruct the particular node to act as a bridge between the networks. The particular node may forward data from either network to the other network. This may allow data for a multicast group to be distributed to members of the multicast group that are located in separate networks.
    Type: Grant
    Filed: November 28, 2017
    Date of Patent: September 17, 2019
    Assignee: Itron, Inc.
    Inventors: Jerome Bartier, James Laurence Taylor, Viet-Hung Nguyen, Hartman Van Wyk
  • Publication number: 20190165964
    Abstract: Techniques for limiting forwarding of multicast communications are described herein. For example, the techniques intelligently forward data along paths of a network where members of a multicast group are located. As such, nodes that do not lead to members of the multicast group may be pruned from distribution of the data. This reduces network communications, ultimately conserving processing, communication, and/or battery resources of the nodes.
    Type: Application
    Filed: November 28, 2017
    Publication date: May 30, 2019
    Inventors: Jerome Bartier, James Laurence Taylor, Viet-Hung Nguyen
  • Publication number: 20190165961
    Abstract: Techniques for bridging communication between multiple networks to facilitate distribution of multicast data are described herein. For example, the techniques may identify a particular node that is able to communicate with each network and instruct the particular node to act as a bridge between the networks. The particular node may forward data from either network to the other network. This may allow data for a multicast group to be distributed to members of the multicast group that are located in separate networks.
    Type: Application
    Filed: November 28, 2017
    Publication date: May 30, 2019
    Inventors: Jerome Bartier, James Laurence Taylor, Viet-Hung Nguyen, Hartman Van Wyk
  • Publication number: 20190165962
    Abstract: Techniques for bridging communication between multiple networks to facilitate distribution of multicast data are described herein. For example, a node that is able to communicate with its network and an adjacent network may send a subscription message indicating that the node is a member of a multicast group. The subscription message may be forwarded up both networks. The node may then forward, between the networks, data that is destined for members of the multicast group.
    Type: Application
    Filed: November 28, 2017
    Publication date: May 30, 2019
    Inventors: Jerome Bartier, James Laurence Taylor, Viet-Hung Nguyen, Hartman Van Wyk
  • Publication number: 20110101946
    Abstract: Various aspects can be implemented to achieve efficient voltage conversion. In general, one aspect can be a switching regulator for DC-DC step-down voltage conversion that includes a high-side transistor and a low-side transistor coupled in series and a first circuitry configured to operate in a synchronous mode such that the high-side transistor and the low-side transistor are used for voltage switching. The switching regulator also includes a second circuitry configured to operate in a non-synchronous mode such that the high-side transistor and one or more diodes are used for voltage switching. The switching regulator further includes an automatic mode selector configured to output a control signal and automatically select between the synchronous mode of operation and the non-synchronous mode synchronous mode of operation based in part on a voltage between source and drain of the low-side transistor and a predetermined delay time.
    Type: Application
    Filed: June 30, 2009
    Publication date: May 5, 2011
    Inventor: James Hung Nguyen
  • Patent number: 6958920
    Abstract: A switching power converter and method of controlling an output voltage thereof using predictive sensing of magnetic flux provides a low-cost switching power converter via primary-side control using a primary-side winding. An integrator generates a voltage that represents flux within a magnetic element by integrating a primary-side winding voltage. A detection circuit detects the end of a half-cycle of post-conduction resonance that occurs in the power magnetic element subsequent to zero energy level in the power magnetic element. The integrator voltage is stored at the end of the half-cycle and is used to determine a sampling point prior to or equal to the start of post-conduction resonance in a subsequent switching cycle of the power converter. The primary-side winding voltage is then sampled at the sampling point, providing an indication of the output voltage of the power converter by which the output voltage of the converter can be controlled.
    Type: Grant
    Filed: May 4, 2004
    Date of Patent: October 25, 2005
    Assignee: Supertex, Inc.
    Inventors: Alexander Mednik, David Chalmers Schie, James Hung Nguyen, Wei Gu
  • Patent number: 6940733
    Abstract: A switch state controller generating a pulse train is used in a power converter utilizing a plurality of converter stages all simultaneously controlled by a single switch controlled by said pulse train. On time of the pulse train is controlled according to an input or interim node characteristic of the supply and period is controlled by a characteristic of the output of the converter. This allows development of AC-to-DC converters, including power-factor-correction converters, and DC to DC converters with high conversion ratio with minimal parts count & high reliability.
    Type: Grant
    Filed: August 22, 2003
    Date of Patent: September 6, 2005
    Assignee: Supertex, Inc.
    Inventors: David Chalmers Schie, Alexander Mednik, James Hung Nguyen, Sang Ton Ngo, Khai Minh Le, Wei Gu, Larry Kerenyi
  • Patent number: 6917504
    Abstract: An apparatus and method for adaptively controlling power supplied to a hot-pluggable subsystem controls the inrush current of the hot-pluggable subsystem when the subsystem is coupled to another system that supplies power, and optionally other signal connections. The apparatus and method adaptively control a pass device by detecting the voltage at the gate of the pass device during initial charging of the gate. The gate voltage may be sampled and used subsequently to control the operation of the pass device, and short-circuit conditions may be detected by determining that the miller effect does not change the charging of the gate capacitance. Automatic restart circuitry can be included to generate multiple startup attempts, and under-voltage lockout circuitry and power-on-reset timers can be used to provide a robust solution. The apparatus and method can be adapted to provide a three terminal device that does not require a feedback connection from a power supply output.
    Type: Grant
    Filed: May 2, 2001
    Date of Patent: July 12, 2005
    Assignee: Supertex, Inc.
    Inventors: James Hung Nguyen, Sang Ton Ngo, David Chalmers Schia, Ladislas G. Kerenyi, Khai Minh Le
  • Publication number: 20040264216
    Abstract: A switching power converter and method of controlling an output voltage thereof using predictive sensing of magnetic flux provides a low-cost switching power converter via primary-side control using a primary-side winding. An integrator generates a voltage representing magnetic flux within a power magnetic element by integrating a voltage on a primary-side winding of the power magnetic element. A detection circuit detects the end of a half-cycle of post-conduction resonance in the power magnetic element after the energy level in the power magnetic element reaches zero. The voltage of the integrator is stored at the end of the post-conduction resonance half-cycle and is used to determine a sampling point prior to or equal to the start of post-conduction resonance in a subsequent switching cycle of the power converter. The primary-side winding voltage is then sampled at the sampling point, providing an indication of the output voltage of the power converter.
    Type: Application
    Filed: October 2, 2003
    Publication date: December 30, 2004
    Inventors: Alexander Mednik, David Chalmers Schie, James Hung Nguyen, Wei Gu
  • Publication number: 20040105283
    Abstract: A switch state controller generating a pulse train is used in a power converter utilizing a plurality of converter stages all simultaneously controlled by a single switch controlled by said pulse train. On time of the pulse train is controlled according to an input or interim node characteristic of the supply and period is controlled by a characteristic of the output of the converter. This allows development of AC-to-DC converters, including power-factor-correction converters, and DC to DC converters with high conversion ratio with minimal parts count & high reliability.
    Type: Application
    Filed: August 22, 2003
    Publication date: June 3, 2004
    Inventors: David Chalmers Schie, Alexander Mednik, James Hung Nguyen, Sang Ton Ngo, Khai Minh Le, Wei Gu, Ladislas G. Kerenyi
  • Patent number: 6525515
    Abstract: A feedback apparatus and method for adaptively controlling power supplied to a hot-pluggable subsystem controls the inrush current of the hot-pluggable subsystem upon application of power. The apparatus and method adaptively control a pass device by detecting the current through the pass device during initial charging of a load capacitance and scaling back the turn-on rate at the pass device control terminal input in conformity with the detected current and a predetermined rate set by a ramp generator. A ramp capacitor is coupled to the control terminal of the pass device through a diode to permit use of the capacitor for timing purposes as well as preventing transient turn-on of the pass device during initial application of power.
    Type: Grant
    Filed: September 24, 2001
    Date of Patent: February 25, 2003
    Assignee: Supertex, Inc.
    Inventors: Sang Ton Ngo, James Hung Nguyen, David Chalmera Schie, Ladislas G. Kerenyi, Khai Minh Le
  • Publication number: 20020166073
    Abstract: An apparatus and method for adaptively controlling power supplied to a hot-pluggable subsystem controls the inrush current of the hot-pluggable subsystem when the subsystem is coupled to another system that supplies power, and optionally other signal connections. The apparatus and method adaptively control a pass device by detecting the voltage at the gate of the pass device during initial charging of the gate. The gate voltage may be sampled and used subsequently to control the operation of the pass device, and short-circuit conditions may be detected by determining that the miller effect does not change the charging of the gate capacitance. Automatic restart circuitry can be included to generate multiple startup attempts, and under-voltage lockout circuitry and power-on-reset timers can be used to provide a robust solution. The apparatus and method can be adapted to provide a three terminal device that does not require a feedback connection from a power supply output.
    Type: Application
    Filed: May 2, 2001
    Publication date: November 7, 2002
    Inventors: James Hung Nguyen, Sang Ton Ngo, David Chalmers Schie, Ladislas G. Kerenyi, Khai Minh Le