Apparatus and method for automatically adjusting power output of an ultrasonic generator
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United States of America Patent
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Oct 18, 1994
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N/A
app pub date -
Feb 22, 1993
filing date -
Feb 22, 1993
priority date (Note) -
Expired
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Abstract
Apparatus and a method for controlling the power output of an ultrasonic generator to a transducer includes a variable impedance network circuit which is interposed between the generator and the transducer. Sensing circuits and a microprocessor are coupled to the input of the transducer so that the total impedance Z.sub.T, the transducer impedance in free air Z.sub.FA and the load impedance Z.sub.L may be calculated and the network impedance Z.sub.NW may be set for a bonding operation to maintain the power level P.sub.L or the impedance Z.sub.L at a desired predetermined level.
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