A high-voltage generator device, including an inductive-capacitive resonator capable of producing a high voltage, a mechanism generating a high-frequency control pulse train, a voltage source, a capacitor, and a voltage generator including a switching transistor, the control electrode of which is connected to the output of the mechanism generating the high-frequency control pulse train, the source of the switching transistor being connect to ground, and the drain of the switching transistor being capable of delivering a voltage pulse train to the inductive-capacitive resonator in response to the control pulse train received on the control electrode of the switching transistor. The drain of the switching transistor is connected to the inductive-capacitive resonator via an isolating transformer, the isolating transformer being connected in parallel with a capacitor, the isolating transformer also being connected to the voltage source.