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Power supply with a piezoelectric transformer and method for power conversion

  • US 8,659,921 B2
  • Filed: 08/28/2009
  • Issued: 02/25/2014
  • Est. Priority Date: 08/28/2009
  • Status: Active Grant
First Claim
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1. A power supply comprising:

  • a piezoelectric transformer;

    a feedback circuit connected to the piezoelectric transformer and configured to control the power supply to operate at a frequency of the piezoelectric transformer;

    an oscillator circuit connected to the piezoelectric transformer, the oscillator circuit controlling a sinusoidal voltage waveform at an input of the piezoelectric transformer; and

    a phase shift network connected between an output of the piezoelectric transformer and an operational amplifier connected to an input of the piezoelectric transformer.

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