Patents by Inventor David J. Perreault

David J. Perreault 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: 20150194940
    Abstract: A radio frequency (RF) power amplifier system or transmitter includes one or more power amplifiers and a controller that is configured to adjust amplitudes and phases of RF input signals of the one or more power amplifiers and supply voltages applied to the one or more power amplifiers. In embodiments where multiple power amplifiers are used, a combiner may be provided to combine outputs of the power amplifiers.
    Type: Application
    Filed: March 24, 2015
    Publication date: July 9, 2015
    Inventors: Mark A. Briffa, Joel L. Dawson, John E. DeRoo, Krenar Komoni, David J. Perreault, Oguzhan Uyar
  • Publication number: 20150188448
    Abstract: A voltage-step down rectifier topology suitable for integration on a die of an integrated circuit is described. In one embodiment, a switched capacitor rectifier is provided having an architecture such that an input voltage swing of the switched-capacitor rectifier is a factor N times an output voltage where N depends upon the number of stages such that the switched-capacitor rectifier can provide a ?/(2N) step-down voltage conversion ratio between an input fundamental ac peak voltage to the output dc voltage. In one embodiment, the rectifier is used in dc-dc conversion. In one embodiment, the rectifier is used in ac power delivery to low-voltage electronics.
    Type: Application
    Filed: August 13, 2013
    Publication date: July 2, 2015
    Applicant: Massachusetts Institute of Technology
    Inventors: David J. Perreault, Wei Li, Nathaniel Jay T. Salazar
  • Publication number: 20150171768
    Abstract: Circuit topologies and control methods for a dc-to-rf converter circuit are described.
    Type: Application
    Filed: March 13, 2013
    Publication date: June 18, 2015
    Applicant: Massachusetts Institute of Technology
    Inventor: David J. Perreault
  • Publication number: 20150155895
    Abstract: An integrated power supply and modulator system includes three subsystems: a magnetic regulation stage, a switched-capacitor voltage balancer stage, and at least one output switching stage. In one embodiment, the integrated power supply and modulator system further includes startup circuitry, feedback/feedforward circuitry, and control circuitry.
    Type: Application
    Filed: February 11, 2015
    Publication date: June 4, 2015
    Inventors: David J. Perreault, Wei Li, Yevgeniy A. Tkachenko, Joel L. Dawson
  • Patent number: 9048727
    Abstract: A converter circuit and related technique for providing high power density power conversion includes a reconfigurable switched capacitor transformation stage coupled to a magnetic converter (or regulation) stage. The circuits and techniques achieve high performance over a wide input voltage range or a wide output voltage range. The converter can be used, for example, to power logic devices in portable battery operated devices.
    Type: Grant
    Filed: April 14, 2014
    Date of Patent: June 2, 2015
    Assignee: Massachusetts Institute of Technology
    Inventors: David M. Giuliano, David J. Perreault, Robert C. N. Pilawa-Podgurski
  • Patent number: 9020453
    Abstract: A radio frequency (RF) power amplifier system or transmitter includes one or more power amplifiers and a controller that is configured to adjust amplitudes and phases of RF input signals of the one or more power amplifiers and supply voltages applied to the one or more power amplifiers. In embodiments where multiple power amplifiers are used, a combiner may be provided to combine outputs of the power amplifiers.
    Type: Grant
    Filed: July 23, 2014
    Date of Patent: April 28, 2015
    Assignee: ETA Devices, Inc.
    Inventors: Mark A. Briffa, Joel L. Dawson, John E. DeRoo, Krenar Komoni, David J. Perreault, Oguzhan Uyar
  • Publication number: 20150084701
    Abstract: An integrated power supply and modulator system includes integrated power supply and modulator system includes three subsystems: a switched-capacitor voltage balancer stage; a magnetic regulation stage; and at least one output switching stage. In one embodiment, the integrated power supply and modulator system further includes startup circuitry, feedback/feedforward circuitry and control circuitry.
    Type: Application
    Filed: September 24, 2013
    Publication date: March 26, 2015
    Applicant: Eta Devices, Inc.
    Inventors: David J. Perreault, Wei Li, Yevgeniy A. Tkachenko
  • Patent number: 8957727
    Abstract: A radio frequency (RF) circuit includes a power supply configured to generate a plurality of voltages, a plurality of power amplifiers, each having an RF output port and a power supply input port, a switch network having a plurality of input ports coupled to the power supply and a plurality of switch network output ports coupled to the power supply input ports of the plurality of power amplifiers, wherein the switch network is configured to output selected ones of the plurality of voltages from the plurality of switch network output ports, at least two of the switch network output port voltages capable of being different ones of the plurality of voltages, and an RF power combiner circuit having a plurality of input ports coupled to RF output ports of the plurality of power amplifiers and an output port at which is provided an output signal of the RF circuit.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: February 17, 2015
    Assignee: Massachusetts Institute of Technology
    Inventors: Joel L. Dawson, David J. Perreault, SungWon Chung, Philip Godoy, Everest Huang
  • Publication number: 20150023063
    Abstract: An impedance control resonant power converter (converter) operated at a fixed switching frequency includes an impedance control network (ICN) coupled between two or more inverters operated at a fixed duty ratio with a phase shift between them and one or more rectifiers. The phase shift is used to control output power or compensate for variations in input or output voltage. The converter operates at fixed frequency yet achieves simultaneous zero voltage switching (ZVS) and zero or near zero current switching (ZCS) across a wide operating range. Output power may be controlled by: (1) changing phase shift between inverters; or (2) adjusting phase shift between inverters depending upon input and/or output voltages so that an admittance presented to the inverters is conductive and then turning the converter on and off at a frequency lower than the converter switching frequency to control output power below a value set by the phase shift.
    Type: Application
    Filed: March 7, 2013
    Publication date: January 22, 2015
    Applicant: Massachusetts Institute of Technology
    Inventors: David J. Perreault, Khurram K. Afridi
  • Publication number: 20140355322
    Abstract: A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low switching frequency and can take advantage of soft charging of the energy storage capacitors to reduce loss. Thus, efficiency of the SSC energy buffer circuit can be extremely high compared with the efficiency of other energy buffer circuits. Since circuits utilizing the SSC energy buffer architecture need not utilize electrolytic capacitors, circuits utilizing the SSC energy buffer architecture overcome limitations of energy buffers utilizing electrolytic capacitors. Circuits utilizing the SSC energy buffer architecture (without electrolytic capacitors) can achieve an effective energy density characteristic comparable to energy buffers utilizing electrolytic capacitors.
    Type: Application
    Filed: January 17, 2013
    Publication date: December 4, 2014
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb, Arthur Hsu Chen Chang
  • Publication number: 20140339918
    Abstract: A stacked switched capacitor (SSC) energy buffer circuit includes a switching network and a plurality of energy storage capacitors. The switching network need operate at only a relatively low switching frequency and can take advantage of soft charging of the energy storage capacitors to reduce loss. Thus, efficiency of the SSC energy buffer circuit can be extremely high compared with the efficiency of other energy buffer circuits. Since circuits utilizing the SSC energy buffer architecture need not utilize electrolytic capacitors, circuits utilizing the SSC energy buffer architecture overcome limitations of energy buffers utilizing electrolytic capacitors. Circuits utilizing the SSC energy buffer architecture (without electrolytic capacitors) can achieve an effective energy density characteristic comparable to energy buffers utilizing electrolytic capacitors.
    Type: Application
    Filed: January 17, 2013
    Publication date: November 20, 2014
    Applicant: MASSACHUSETTS INSTITUTE OF TECHNOLOGY
    Inventors: David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb, Arthur Hsu Chen Chang
  • Publication number: 20140335805
    Abstract: A radio frequency (RF) power amplifier system or transmitter includes one or more power amplifiers and a controller that is configured to adjust amplitudes and phases of RF input signals of the one or more power amplifiers and supply voltages applied to the one or more power amplifiers. In embodiments where multiple power amplifiers are used, a combiner may be provided to combine outputs of the power amplifiers.
    Type: Application
    Filed: July 23, 2014
    Publication date: November 13, 2014
    Inventors: Mark A. Briffa, Joel L. Dawson, John E. DeRoo, Krenar Komoni, David J. Perreault, Oguzhan Uyar
  • Publication number: 20140313781
    Abstract: Described herein is a stacked switched capacitor (SSC) energy buffer circuit architecture and related design and control techniques.
    Type: Application
    Filed: January 17, 2013
    Publication date: October 23, 2014
    Inventors: David J. Perreault, Khurram K. Afridi, Minjie Chen
  • Patent number: 8830710
    Abstract: An energy recovery system is provided that can be used in place of a resistive termination. The energy recovery system can simulate the behavior and performance of a resistive termination, while recovering at least some of the energy that would otherwise have been dissipated within the termination. In one embodiment, the energy recovery system includes a rectification system having a plurality of tuned rectifier circuits and an RF input network to provide input power distribution to the plurality of tuned rectifier circuits and input impedance shaping to shape the collective input impedance of the plurality of tuned rectifier circuits as seen at the RF input port of the RF input network.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: September 9, 2014
    Assignee: Eta Devices, Inc.
    Inventors: David J. Perreault, Joel L. Dawson
  • Patent number: 8830709
    Abstract: A resistance compression network to shape an input impedance at a port for transferring energy to multiple loads at a first frequency includes first and second transmission line segments having outputs for coupling to first and second loads and having different electrical lengths at a first frequency and a compression port coupled to inputs of both the first and the second transmission line segments. Over a set of operating conditions of interest, an equivalent resistance looking into the compression port at the frequency varies over a first resistance range as equivalent resistances of the first and second loads vary over a second resistance range and a range ratio associated with the first resistance range is less than a range ratio associated with the second resistance range and the range ratio of a subject range is a ratio of a largest resistance value in the subject range to a smallest resistance value in the subject range.
    Type: Grant
    Filed: March 13, 2013
    Date of Patent: September 9, 2014
    Assignee: Eta Devices, Inc.
    Inventor: David J. Perreault
  • Patent number: 8829993
    Abstract: Circuits and methods for achieving high linearity, high efficiency power amplifiers, including digital predistortion (DPD) and pulse cancellation in switched-state RF power amplifier systems are described.
    Type: Grant
    Filed: March 15, 2013
    Date of Patent: September 9, 2014
    Assignee: Eta Devices, Inc.
    Inventors: Mark A. Briffa, Joel L. Dawson, John E. DeRoo, Krenar Komoni, David J. Perreault, Oguzhan Uyar
  • Patent number: 8824978
    Abstract: A radio frequency (RF) power amplifier system or transmitter includes one or more power amplifiers and a controller that is configured to adjust amplitudes and phases of RF input signals of the one or more power amplifiers and supply voltages applied to the one or more power amplifiers. In embodiments where multiple power amplifiers are used, a combiner may be provided to combine outputs of the power amplifiers. In at least one implementation, amplitude adjustment of the RF input signals of the one or more power amplifiers may be used to provide transmit power control and/or power backoff.
    Type: Grant
    Filed: October 30, 2012
    Date of Patent: September 2, 2014
    Assignee: ETA Devices, Inc.
    Inventors: Mark A. Briffa, Joel L. Dawson, John E. DeRoo, Krenar Komoni, David J. Perreault, Oguzhan Uyar
  • Publication number: 20140226378
    Abstract: A resistance compression network uses transmission line sections having asymmetric lengths to compress the resistance range of multiple loads. In some embodiments, the characteristic impedance of the transmission line sections is related to the geometric mean of the load resistance range. The resistance compression network may be used within, for example, an energy recovery system or in any other application where a reduction in the resistance range of multiple loads is desired.
    Type: Application
    Filed: April 17, 2014
    Publication date: August 14, 2014
    Applicant: Eta Devices, Inc.
    Inventor: David J. Perreault
  • Publication number: 20140225581
    Abstract: A converter circuit and related technique for providing high power density power conversion includes a reconfigurable switched capacitor transformation stage coupled to a magnetic converter (or regulation) stage. The circuits and techniques achieve high performance over a wide input voltage range or a wide output voltage range. The converter can be used, for example, to power logic devices in portable battery operated devices.
    Type: Application
    Filed: April 14, 2014
    Publication date: August 14, 2014
    Applicant: Massachusetts Institute of Technology
    Inventors: David M. Giuliano, David J. Perreault, Robert C.N. Pilawa-Podgurski
  • Publication number: 20140167513
    Abstract: Described is a method and apparatus for per-panel photovoltaic energy extraction with integrated converters. Also described are switched-capacitor (SC) converters have been evaluated for many applications because of the possibility for on-chip integration; applications to solar arrays are no exception. Also described is a comprehensive system-level look at solar installations, finding possibilities for optimization at and between all levels of operation in an array. Specifically, novel concepts include new arrangements and options for applying switched-capacitor circuits at 3 levels: for the panel and sub-panel level, as part of the overall control strategy, and for ensuring stable and robust interface to the grid with the possibility of eliminating or reducing the use of electrolytic capacitors.
    Type: Application
    Filed: February 3, 2013
    Publication date: June 19, 2014
    Inventors: Arthur Hsu Chen Chang, David J. Perreault, Khurram K. Afridi, Minjie Chen, Steven B. Leeb