Patents by Inventor Donald Marabell

Donald Marabell 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: 20090003018
    Abstract: A direct current to direct current (DC/DC) converter control systems and related methods are disclosed. An exemplary embodiment provides a control circuit configured to modulate the duty cycles of a first switching device and a second switching device, and is further configured to compensate for a voltage drift at a monitoring node by varying the modulation for at least one of the switching devices.
    Type: Application
    Filed: October 15, 2007
    Publication date: January 1, 2009
    Inventors: Barry O. Blair, Rick L. Barnett, Donald Marabell, Kalyan Siddabatula
  • Patent number: 6879199
    Abstract: Disclosed is an apparatus for generating two constant width and symmetrical drive signals from two separate, but complementary, pulse width modulated control signals while also generating two pulse width modulated drive signals corresponding to said pulse width modulated control signals. The constant width drive signals are generated through the use of a toggle or latch set/reset circuit actuated by a given characteristic of each of the control signals.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: April 12, 2005
    Assignee: Valere Power, Inc.
    Inventors: Barry Olen Blair, Gregory H. Fasullo, James Edward Harvey, Donald Marabell
  • Patent number: 6690589
    Abstract: Disclosed is an apparatus that equally distributes current from a rectifier circuit to a plurality of power factor correction circuit units by equal current magnitudes and lower component count advantages of peak current sensing with the lower harmonic distortion advantages of average current sensing. The output of a single average current sensing correction circuit in a master controller is logically compared with the output of a peak current sensing circuit in each of a plurality of interleaved master and slave controller units to produce a difference signal used to operate the switch in the switch leg of each controller unit to reduce emi, harmonic distortion and increase power factor toward an in phase condition.
    Type: Grant
    Filed: February 28, 2002
    Date of Patent: February 10, 2004
    Assignee: Valere Power, Inc.
    Inventors: Rick L. Barnett, Barry Olen Blair, Gregory H. Fasullo, Donald Marabell, Andrew Marsh
  • Publication number: 20030161167
    Abstract: Disclosed is an apparatus that equally distributes current from a rectifier circuit to a plurality of power factor correction circuit units by equal current magnitudes and lower component count advantages of peak current sensing with the lower harmonic distortion advantages of average current sensing. The output of a single average current sensing correction circuit in a master controller is logically compared with the output of a peak current sensing circuit in each of a plurality of interleaved master and slave controller units to produce a difference signal used to operate the switch in the switch leg of each controller unit to reduce emi, harmonic distortion and increase power factor toward an in phase condition.
    Type: Application
    Filed: February 28, 2002
    Publication date: August 28, 2003
    Inventors: Rick L. Barnett, Barry Olen Blair, Gregory H. Fasullo, Donald Marabell, Andrew Marsh
  • Publication number: 20030155952
    Abstract: Disclosed is an apparatus for generating two constant width and symmetrical drive signals from two separate, but complementary, pulse width modulated control signals while also generating two pulse width modulated drive signals corresponding to said pulse width modulated control signals. The constant width drive signals are generated through the use of a toggle or latch set/reset circuit actuated by a given characteristic of each of the control signals.
    Type: Application
    Filed: February 15, 2002
    Publication date: August 21, 2003
    Inventors: Barry Olen Blair, Gregory H. Fasullo, James Edward Harvey, Donald Marabell
  • Patent number: 6483724
    Abstract: Disclosed is a DC/DC converter apparatus comprising a full bridge non-resonant pulse-width-modulated (PWM) switching circuit, which includes inductive device(s), clamp diodes, and an output transformer rectifier and filter circuit. Capacitive and diode elements associated with bridge switching devices operate to switch current through the switches at substantially zero voltage (ZVS). The inductor element and clamp diodes are used to reduce the primary transition shoot through current resulting from reverse recovery of the transformer secondary rectification stage while also reducing emi and semiconductor stresses.
    Type: Grant
    Filed: February 15, 2002
    Date of Patent: November 19, 2002
    Assignee: Valere Power, Inc.
    Inventors: Barry Olen Blair, Gregory H. Fasullo, James Edward Harvey, Donald Marabell