A driver device for a voltage-controlled oscillator (10), comprising an unstable voltage source (14), a voltage regulator (22), a driver (18) for producing a control voltage (U2) for the oscillator (10), and a feedback loop (20) controlling the driver (18) according to the output signal (Rf) of the oscillator (10), characterized in that the voltage regulator (22) supplies the feedback loop (20) with an operating voltage, while the driver (18) is fed by the non-adjusted voltage (Ub) of the voltage source (14) and in that the feedback loop (20) in embodied such that it can compensate voltage fluctuations of the voltage source (14) with the aid of the driver (18).