Activating circuit of a resonant converter

An activation circuit for activating a power bridge circuit of a resonance converter, including an inductive activation transformer (6) that transfers a pulsed control signal generated via a CMOS driver (1, 2) to the power bridge circuit, wherein a clamping circuit (11, 12) is arranged at the output (3, 4) of each CMOS driver (1, 2), where the clamping circuit clamps a primary winding (5) of the activation transformer (6) to a ground potential (10') during the dead time between two pulses of the pulsed control signal such that overvoltages, which otherwise arise when switching the activation transformer inductance, are thus clamped during a dead time and a circuit breaker (28, 29) switches off securely.