Method of tuning ultrasonic devices

Details Method of tuning ultrasonic devices Method of tuning ultrasonic devices

1994-04-28

1995-07-11

Zele, Krista M.

Surgery

Instruments

Means for concretion removal

606169, 606171, 604 22, 331154, 310316, A61B 1700, A61F 900

Patent

active

054316642

ABSTRACT:
A method of tuning ultrasonic transducers by using the admittance of the transducer as the tuning parameter rather than the phase angle. The admittance magnitude of a transducer is not related to the phase angle and thus, using the admittance of the transducer as the tuning parameter allows tuning over a broad bandwidth. In addition, transducer performance can be normalized against the variation in admittance magnitude and frequency location of the series and parallel resonance points by quantifying these variations and continually adjusting the operational set point as a function of transducer drive voltage during transducer operation.

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