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Piezoelectric devices and methods and circuits for driving same

  • US 7,969,064 B2
  • Filed: 09/24/2007
  • Issued: 06/28/2011
  • Est. Priority Date: 04/02/2004
  • Status: Expired due to Fees
First Claim
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1. A drive circuit which produces a drive signal for a device having a piezoelectric actuator, the piezoelectric actuator forming a part of the drive circuit and serving to shape a waveform of the drive signal, the drive circuit comprising:

  • a pulse generator configured to generate digital pulses;

    a converter circuit configured to use the digital pulses generated by the pulse generator to produce high voltage charge packets having a frequency greater than an ability of the piezoelectric actuator to mechanically respond; and

    wherein the piezoelectric actuator, by a capacitive nature of the piezoelectric actuator, integrates the charge packets to shape the waveform of the drive signal.

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