Ultrasound power generating system with sampled-data frequency control
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United States of America Patent
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Oct 30, 1990
Grant Date -
N/A
app pub date -
Feb 9, 1988
filing date -
Feb 9, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system is provided for applying ultrasound power to treat human tissue comprising a transducer driven by an oscillating signal from a power amplifier. The transducer and power amplifier have a power-conversion-efficiency characteristic which is a function of the frequency of the oscillating signal and the acoustic load on the transducer. Data sampling and frequency adjustment means are provided which continually monitor the current supplied to the crystal and adjust the frequency of the oscillating signal to maximize the power-conversion-efficiency of the transducer and power amplifier.
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