Ultrasonic generator for supplying an electrical power, lithotripsy device for fragmenting calculi, and method for operating and/or controlling a lithotripsy device

An ultrasonic generator configured to supply an AC voltage to an ultrasonic vibration excitor to generate a resonant vibration in a sonotrode which is configured for fragmenting calculi, the ultrasonic generator being assigned to the sonotrode, the ultrasonic vibration excitor configured to excite a vibration of the sonotrode, and a force generation apparatus configured to generate a force for moving a projectile for shock excitation of the sonotrode, with the ultrasonic vibration excitor being excited at a vibration frequency by the ultrasonic generator by supplying the AC voltage, the ultrasonic generator comprising:

• a transmitter,
• an oscillator,
• a sine-wave generator, wherein the transmitter is configured to at least provide electrical isolation between a lower AC voltage from the sine-wave generator and a higher voltage for the ultrasonic vibration excitor,
• a phase locked loop unit, the a phase locked loop unit being connected to the oscillator that is connected to the sine-wave generator configured to generate the AC voltage for the ultrasonic vibration excitor, and
• a measuring apparatus with at least one measuring unit configured to measure a time profile of a voltage and/or current, and an open-loop and/or closed-loop control apparatus, that is a phase locked loop unit, configured to adjust an electrical power supplied by the ultrasonic generator to the ultrasonic vibration excitor, with the measuring apparatus comprising at least one resistor arranged in parallel with the at least one measuring unit and a capacitor arranged in parallel with the measuring unit, wherein the measuring apparatus comprises, in parallel with the at least one measuring unit, at least one suppressor diode configured to suppress overvoltage.