Electrosurgical generator

An electrosurgical generator comprising:

• a high-voltage DC power supply;
• and
• a resonant circuit that is connected to the high-voltage DC power supply, the resonant circuit having an output transformer including a primary winding and a distinct secondary winding electrically connected to connections for an electrosurgical instrument, the primary winding of the output transformer being formed as part of the resonant circuit, the secondary winding being isolated from the primary winding, the resonant circuit being electrically connected to an actuation circuit configured to periodically emit actuation pulses configured to excite the resonant circuit using a resonant frequency of the resonant circuit, wherein:
• the actuation circuit includes a synchronization unit electrically connected to the resonant circuit, the synchronization unit includes at least one gradient detector, and the synchronization unit is configured to synchronize actuation pulses with a reversal point of a voltage profile of a voltage in the resonant circuit,
• the synchronization unit is configured to determine the respective reversal point of the voltage profile of the voltage in the resonant circuit using of the gradient detector, and
• the gradient detector is configured to detect a change in a gradient direction of the voltage profile of the voltage in the resonant circuit and to emit a synchronization signal that causes the actuation circuit to trigger an actuation pulse for the resonant circuit.