| 摘要 |
The invention relates to an electrosurgery generator which has a high-voltage DC supply unit and a resonant circuit connected thereto. The resonant circuit has an output transformer, the primary coil of which is part of the resonant circuit and the secondary coil of which is connected to terminals for an electrosurgery instrument. The resonant circuit is additionally connected to an actuation circuit which is designed to periodically output actuation pulses in order to excite the resonant circuit at the resonant frequency of the resonant circuit. The actuation circuit comprises a synchronization unit which is connected to the resonant circuit, has at least one slope detector, and is designed to synchronize actuation pulses with a reversal point of the voltage curve of the voltage in the resonant circuit. The synchronization unit is designed to ascertain a respective reversal point of the voltage curve of the voltage in the resonant circuit by means of the slope detector. The slope detector is designed to detect a change of the slope direction of the voltage curve of the voltage in the resonant circuit and to output a synchronization signal which causes the actuation circuit to trigger an actuation pulse for the resonant circuit. |
