HF surgery device
First Claim
1. A HF surgery device for use with a source of rectified operating voltage and with a modulation signal generator, comprising:
- a microprocessor and a comparator in combination operating as a comparison circuit which generates a control signal as an output;
a HF generator supplied by a rectified operating voltage from said source and being modulable by a modulation signal from said generator;
means for controlling said rectified operating voltage based on said control signal; and
said microprocessor including means for forming a reference value from said modulation signal and from a prescribed setting signal which sets an HF output power, said reference value being supplied to said comparator and being compared therein to said operating voltage for forming said control signal to maintain said operating voltage at a substantially constant level.
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Accused Products
Abstract
A HF surgery device had a microprocessor and a comparator which in combination generate a control signal which acts on a rectified operating voltage, which drive a HF generator. The HF generator can be modulated with a modulation signal. In order to automatically maintain the effective output power at a constant level in the event of a modulation of the HF generator, the microprocessor forms a reference value from the modulation signal and from a prescribed setting signal for setting a HF output power. The reference value is compared to the operating voltage in the comparator for forming the control signal.
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Citations
9 Claims
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1. A HF surgery device for use with a source of rectified operating voltage and with a modulation signal generator, comprising:
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a microprocessor and a comparator in combination operating as a comparison circuit which generates a control signal as an output; a HF generator supplied by a rectified operating voltage from said source and being modulable by a modulation signal from said generator; means for controlling said rectified operating voltage based on said control signal; and said microprocessor including means for forming a reference value from said modulation signal and from a prescribed setting signal which sets an HF output power, said reference value being supplied to said comparator and being compared therein to said operating voltage for forming said control signal to maintain said operating voltage at a substantially constant level. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification