Patents by Inventor Marian Vranka

Marian Vranka 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).

  • Power converter with self-driven synchronous rectifier control circuitry
    Patent number: 9577546
    Abstract: An AC-DC power converter is provided with two pairs of self-driven synchronous rectifier switches in addition to, or in place of, diode bridge rectifiers for boosting efficiency and reducing cost. An AC sensing circuit is coupled to AC input terminals, and a DC level shifting circuit applies a DC offset to an AC input signal received via the sensing circuit. A comparator circuit determines positive and negative half waves of the AC input signal relative to the DC offset value. Gate drive signals are provided for driving a first set of parallel rectifier switches during a positive half cycle of the AC input signal, and for driving a second and opposing pair of parallel rectifier switches during a negative half cycle of the AC input signal. In an embodiment, high side gate drive signals may be electrically isolated from the active rectifier control circuitry.
    Type: Grant
    Filed: February 17, 2014
    Date of Patent: February 21, 2017
    Assignee: PAI CAPITAL LLC
    Inventors: Andrej Teren, Marian Vranka, Martin Pietka, Lee Tai Keung
  • POWER CONVERTER WITH SELF-DRIVEN SYNCHRONOUS RECTIFIER CONTROL CIRCUITRY
    Publication number: 20140268956
    Abstract: An AC-DC power converter is provided with two pairs of self-driven synchronous rectifier switches in addition to, or in place of, diode bridge rectifiers for boosting efficiency and reducing cost. An AC sensing circuit is coupled to AC input terminals, and a DC level shifting circuit applies a DC offset to an AC input signal received via the sensing circuit. A comparator circuit determines positive and negative half waves of the AC input signal relative to the DC offset value. Gate drive signals are provided for driving a first set of parallel rectifier switches during a positive half cycle of the AC input signal, and for driving a second and opposing pair of parallel rectifier switches during a negative half cycle of the AC input signal. In an embodiment, high side gate drive signals may be electrically isolated from the active rectifier control circuitry.
    Type: Application
    Filed: February 17, 2014
    Publication date: September 18, 2014
    Inventors: Andrej Teren, Marian Vranka, Martin Pietka, Lee Tai Keung