Phacoemulsification probe drive circuit
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United States of America Patent
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-
Jul 26, 1994
Grant Date -
N/A
app pub date -
Sep 4, 1992
filing date -
Sep 4, 1992
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A drive for a phacoemulsification probe includes a drive circuit for supplying electrical power to the probe, circuitry for sensing the electrical power supplied by the drive circuit to the probe and for supplying electrical signals indicative of the magnitude of the electrical power supplied. A manually operable input device provides a signal indicative of the transducer power level desired by the user of the probe. A control circuit is responsive to the signal indicative of the desired transducer power level and to the signals indicative of the magnitude of the supplied electrical power for providing control signals to the drive circuit to control the power applied and to control the efficiency of the application of power. The drive circuit includes an amplifier responsive to at least one of the control signals to apply power at the desired level, and also includes a regulator for supplying a supply voltage to the amplifier. The regulator is responsive to a second control signal from the control circuit to vary the peak voltage supplied by the regulator to the amplifier to substantially minimize the amplifier's power consumption.
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