Patents by Inventor Philip Allington

Philip Allington 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: 5663877
    Abstract: A synchronous rectifier having two MOSFETs and a transformer with a primary winding and a first and second secondary winding in the transformer and a control device in the rectifier circuitry. The second secondary winding (tertiary winding) and the control device are connected within the synchronous rectifier to provide protection for the two MOSFETs from destruction caused by reverse feed.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: September 2, 1997
    Assignee: Melcher, AG
    Inventors: Rene Dittli, Philip Allington
  • Patent number: 5636116
    Abstract: In a synchronous rectifier having at least a transformer whose flow of current through the primary winding is periodically switched on and off and includes, as a controlled rectifier, a first and second MOSFET. A third and fourth MOSFET are provided whose source terminals are connected to the gate terminals of the first and second MOSFETs and to a second of two output terminals of the rectifier through a resistor. A Schottky diode is connected in parallel with the drain and source terminals of the first MOSFET with the cathode of the Schottky diode and the drain terminal of the first MOSFET being connected to a first of the two output terminals. A switching block circuit is connected between the parallel connection of the Schottky diode and the first MOSFET and the second output terminal of the rectifier. A capacitor is connected between the gate terminals of the third and fourth MOSFETs and the second output terminal of the rectifier. The output of a logic unit is connected in parallel with the capacitor.
    Type: Grant
    Filed: December 8, 1994
    Date of Patent: June 3, 1997
    Assignee: Melcher AG
    Inventors: Johann Milavec, Philip Allington