Patents by Inventor Clifford Duong

Clifford Duong 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: 7616456
    Abstract: A device for providing power to suppress transient load demands and a system including the device are disclosed. The device includes a sense circuit to detect when a transient event occurs and one or more transistors configured to supply or sink current to the load. The system may include a second power regulator configured to respond to fast transient power demands. In this case, a first power regulator supplies power to the load and responds to slow transient events, while the second regulator responds only to fast transient events.
    Type: Grant
    Filed: July 3, 2006
    Date of Patent: November 10, 2009
    Assignee: Primarion Corporation
    Inventors: Ken Ostrom, Tim Ng, Clifford Duong
  • Patent number: 7391192
    Abstract: A device for providing power to suppress transient load demands and a system including the device are disclosed. The device includes a sense circuit to detect when a transient event occurs and one or more transistors configured to supply or sink current to the load. The system may include a second power regulator configured to respond to fast transient power demands. In this case, a first power regulator supplies power to the load and responds to slow transient events, while the second regulator responds only to fast transient events.
    Type: Grant
    Filed: August 31, 2001
    Date of Patent: June 24, 2008
    Assignee: Primarion, Inc.
    Inventors: Ken Ostrom, Tim Ng, Clifford Duong
  • Publication number: 20070075692
    Abstract: Methods and apparatus for regulating power supply according to various aspects of the present invention operate in conjunction with an electronic system configured to interface with a primary voltage regulator. The electronic system comprises a load configured to receive supply current from the primary voltage regulator and a secondary voltage regulator. The secondary voltage regulator includes at least one current source coupled to the load and is configured to provide current to the load. The secondary voltage regulator further comprises a control circuit coupled to the current source and the load, which determines a current demand for the load exceeding the supply current received from the primary voltage regulator, and adjusts the current provided to the load by the current source according to the current demand.
    Type: Application
    Filed: October 3, 2006
    Publication date: April 5, 2007
    Inventors: Kenneth Ostrom, Benjamin Tang, Tim Ng, Clifford Duong
  • Publication number: 20060250119
    Abstract: A device for providing power to suppress transient load demands and a system including the device are disclosed. The device includes a sense circuit to detect when a transient event occurs and one or more transistors configured to supply or sink current to the load. The system may include a second power regulator configured to respond to fast transient power demands. In this case, a first power regulator supplies power to the load and responds to slow transient events, while the second regulator responds only to fast transient events.
    Type: Application
    Filed: July 3, 2006
    Publication date: November 9, 2006
    Inventors: Ken Ostrom, Tim Ng, Clifford Duong
  • Patent number: 6975494
    Abstract: A method, apparatus, and system for providing operating power and transient suppression power to a microelectronic device are disclosed. The system includes a primary regulator to supply nominal operating power and to respond to relatively slow transient events and a transient suppression regulator to respond to fast transient power events. The system also includes a sense circuit to detect when a transient event occurs and to send a signal to the transient suppression regulator to supply or sink current to the load in response to a sensed transient power event.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: December 13, 2005
    Assignee: Primarion, Inc.
    Inventors: Benjamim Tang, Kenneth Ostrom, Timothy Ng, Keith Nelson Bassett, Nicholas Robert Steffen, Clifford Duong, William Pohlman, Robert Carroll
  • Patent number: 6809504
    Abstract: A dual loop regulator is configured for improved regulation of a supply voltage for a dynamic load based on the magnitude of changes in the load voltage. An exemplary dual loop regulator comprises a primary voltage regulator configured within a linear loop and a secondary voltage regulator configured within a wideband, non-linear loop. The primary voltage regulator is configured for providing a well-controlled, regulated output voltage to the dynamic load, and for addressing small changes in the output voltage. The secondary voltage regulator is configured for sensing undervoltage and overvoltage conditions at the dynamic load, and for addressing changes greater than a predetermined threshold voltage. To facilitate loop stability, secondary voltage regulator can be configured within the wideband, non-linear loop to have a small gain for small changes, a larger gain for large changes, and/or a substantially finite storage capability such that any large signal oscillations will not be sustained.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: October 26, 2004
    Assignee: Primarion, Inc.
    Inventors: Benjamim Tang, Ken Ostrom, Tim Ng, Clifford Duong
  • Patent number: 6789036
    Abstract: A transient current generator for testing microelectronic power regulator systems is provided. The current generator includes a current source and one or more transistors to provide current or sink current to a microelectronic power delivery system. The generator may be used to test a microprocessor power delivery system by replacing the microprocessor with one or more of the generators of the present invention.
    Type: Grant
    Filed: January 22, 2002
    Date of Patent: September 7, 2004
    Assignee: Primarion, Inc.
    Inventors: Kenneth Ostrom, Tim Ng, Clifford Duong
  • Publication number: 20030006650
    Abstract: A method, apparatus, and system for providing operating power and transient suppression power to a microelectronic device are disclosed. The system includes a primary regulator to supply nominal operating power and to respond to relatively slow transient events and a transient suppression regulator to respond to fast transient power events. The system also includes a sense circuit to detect when a transient event occurs and to send a signal to the transient suppression regulator to supply or sink current to the load in response to a sensed transient power event.
    Type: Application
    Filed: May 15, 2002
    Publication date: January 9, 2003
    Inventors: Benjamim Tang, Kenneth Ostrom, Timothy Ng, Keith Nelson Bassett, Nicholas Roberts Steffen, Clifford Duong, William Pohlman, Robert Carroll
  • Publication number: 20020135339
    Abstract: A dual loop regulator is configured for improved regulation of a supply voltage for a dynamic load based on the magnitude of changes in the load voltage. An exemplary dual loop regulator comprises a primary voltage regulator configured within a linear loop and a secondary voltage regulator configured within a wideband, non-linear loop. The primary voltage regulator is configured for providing a well-controlled, regulated output voltage to the dynamic load, and for addressing small changes in the output voltage. The secondary voltage regulator is configured for sensing undervoltage and overvoltage conditions at the dynamic load, and for addressing changes greater than a predetermined threshold voltage. To facilitate loop stability, secondary voltage regulator can be configured within the wideband, non-linear loop to have a small gain for small changes, a larger gain for large changes, and/or a substantially finite storage capability such that any large signal oscillations will not be sustained.
    Type: Application
    Filed: March 21, 2002
    Publication date: September 26, 2002
    Inventors: Benjamim Tang, Ken Ostrom, Tim Ng, Clifford Duong
  • Publication number: 20020096941
    Abstract: A transient current generator for testing microelectronic power regulator systems is provided. The current generator includes a current source and one or more transistors to provide current or sink current to a microelectronic power delivery system. The generator may be used to test a microprocessor power delivery system by replacing the microprocessor with one or more of the generators of the present invention.
    Type: Application
    Filed: January 22, 2002
    Publication date: July 25, 2002
    Inventors: Kenneth Ostrom, Tim Ng, Clifford Duong
  • Patent number: 6400229
    Abstract: A low noise, low distortion radio frequency amplifier which includes a bootstrap design to minimize intermodulation distortion while simultaneously achieving low noise and wide bandwidth. In the illustrative embodiment, the invention includes a first circuit for receiving an input signal; a second circuit for amplifying the input signal using a transistor Q2; and a third circuit for regulating a rate of change of voltage across the transistor Q2 such that the rate of voltage change is zero. The third circuit includes a transistor Q3 connected to the transistor Q2 in cascode. In the specific illustrative embodiment, the third circuit further includes two diodes D1 and D2 used to modulate the voltage at the input of the transistor Q3 in proportion to the voltage modulation at the input of the transistor Q2. In the illustrative embodiment, the second circuit includes a transistor Q1 connected in cascade to the transistor Q2.
    Type: Grant
    Filed: February 22, 2001
    Date of Patent: June 4, 2002
    Assignee: Raytheon Company
    Inventors: Kelvin T. Tran, Clifford Duong, Michael N. Farias, Don C. Devendorf, Lloyd F. Linder
  • Publication number: 20020046354
    Abstract: A device for providing power to suppress transient load demands and a system including the device are disclosed. The device includes a sense circuit to detect when a transient event occurs and one or more transistors configured to supply or sink current to the load. The system may include a second power regulator configured to respond to fast transient power demands. In this case, a first power regulator supplies power to the load and responds to slow transient events, while the second regulator responds only to fast transient events.
    Type: Application
    Filed: August 31, 2001
    Publication date: April 18, 2002
    Inventors: Ken Ostrom, Tim Ng, Clifford Duong