A gate driver circuit for driving a gate-controlled switching device comprises a voltage monitor circuit portion arranged to produce a first value that is dependent on a time derivative (dv/dt) of a voltage applied across the gate-controlled switching device. A current monitor circuit portion is arranged to produce a second value that is dependent on a time derivative (di/dt) of a current through the gate-controlled switching device. A compensator is arranged to receive an alternating input signal (PWMref), the first value, and the second value, wherein the compensator modulates a magnitude and transition profile of the alternating input signal (PWMref) in response to the respective time derivatives of the voltage and the current, thereby generating a modulated control signal (PWMN). The gate driver circuit supplies the modulated control signal (PWMN) to the gate terminal of the gate-controlled switching device.