Patent ID: 7741753
Filing Date: 2010-06-22
Classification: B06B

Abstract:
1. A system for coupling megasonics to a liquid, comprising: one or more transducers adapted for coupling to a liquid, the transducers constructed and arranged so as to be capable of producing megasonics in the liquid at frequencies within at least two frequency bands, and, a megasonics generator adapted for producing a driver signal for driving the transducers at frequencies in one or more frequency ranges within each of the at least two frequency bands; wherein the driver signal of the megasonics generator drives the transducers to produce megasonics in the liquid at a frequency within at least one of the frequency ranges in one of the at least two frequency bands; and, wherein the megasonics generator has an output stage, which comprises a) modification circuitry which modifies the output stage; b) an AC switch, operatively connected to the modification circuitry, which switches the modification circuitry into and out of the output stage of the megasonics generator; and c) control circuitry, associated with the AC switch and with the megasonics generator, which is adapted to turn off and turn on the AC switch, wherein the control circuitry, AC switch and modification circuitry changes the megasonics generator driver signal to further drive the transducers to change frequency to a different frequency range in a different frequency band, so as to generate megasonics at a frequency within at least one additional frequency range in at least one additional frequency band of the at least two frequency bands.