Patents by Inventor Thor Wacyk

Thor Wacyk 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).

  • High voltage integrated circuit driver for half-bridge circuit employing a bootstrap diode emulator
    Patent number: 5373435
    Abstract: A half-bridge driver circuit including a lower drive module and a floating upper drive module for driving respective external upper and lower power transistors of a high voltage half bridge is contained in an integrated circuit chip which includes an on-chip bootstrap diode emulator for charging an external bootstrap capacitor that powers the upper drive module. The upper drive is accommodated in an insulated well and the diode emulator includes as its main current carrying element, a LDMOS transistor formed along the periphery of the well. The LDMOS transistor is driven into a conducting state at the same time the lower power transistor is driven into a conducting state.
    Type: Grant
    Filed: November 19, 1993
    Date of Patent: December 13, 1994
    Assignee: Philips Electronics North America Corporation
    Inventors: Rajsekhar Jayaraman, Anand Janaswamy, Thor Wacyk