Patents Represented by Attorney, Agent or Law Firm David J. Boluc
  • Inverter circuit with multilayer piezoelectric transformer
    Patent number: 6278625
    Abstract: An inverter circuit is provided using a voltage converter having multiple layers of piezoelectric ceramic. More specifically, the present invention provides an inverter circuit for a Cold Cathode Fluorescent Lamp (CCFL) incorporating a multilayer piezoelectric transformer that uses the longitudinal resonant vibration mode for step-up voltage conversion. The transformer is driven by a FET half-bridge connected to an oscillator through dual current buffers, one current buffer being driven through and a level shifter and charge pump.
    Type: Grant
    Filed: July 13, 2000
    Date of Patent: August 21, 2001
    Assignee: Face International Corp.
    Inventor: Clark Davis Boyd