Patent ID: 8269485
Filing Date: 2012-09-18
Classification: G01D

Abstract:
1. A system comprising: a transducer which operates based on periodic phase inversion; a programmable processor, which operates according to a stored program, said stored program causing said processor to produce a first waveform based on stored instructions, wherein said first waveform is a square wave produced by a first instruction to produce a rising edge of the square wave, and a second instruction to produce a falling edge of the square wave, and further comprising a low pass filter which filters all but a fundamental frequency of said square wave to produce a substantially pure sine wave that is based on said stored instructions, and using said sine wave to drive said transducer, wherein the stored program said processor to create and output a selectively inverting signal that is selectively inverted relative to an output of said transducer at a timing that is synchronized to an operation of said transducer and phase shifted relative to said operation of said transducer.