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Method for driving an ultrasonic handpiece with a class D amplifier

  • US 20070249941A1
  • Filed: 04/21/2006
  • Published: 10/25/2007
  • Est. Priority Date: 04/21/2006
  • Status: Abandoned Application
First Claim
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1. A method for controlling an ultrasonic handpiece of a phacoemulsification surgical system, the method comprising:

  • providing a first signal at a first frequency and a second signal at a second frequency as inputs to a class D amplifier; and

    driving the ultrasonic handpiece using the output of the class D amplifier, the output of the class D amplifier having at least two frequency components that simultaneously move a cutting tip of the ultrasonic handpiece in different directions.

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