A noise suppression circuit comprises a switchable transistor and an amplifier having a first amplifier input terminal electrically coupled to an output terminal of the switchable transistor for sensing a voltage thereat, and an amplifier output terminal electrically coupled to a control terminal of the switchable transistor for outputting a control voltage thereto. The amplifier is configured, based on the sensed voltage and a transition mode threshold voltage of the switchable transistor which defines a boundary between operation modes of the switchable transistor, to set the voltage at the transistor output terminal to at least the transition mode threshold voltage such that for noise frequencies below or corresponding to the switching frequency of the switchable transistor a resistive path is provided between the transistor output terminal and the transistor reference terminal and for noise frequencies above the switching frequency of the switchable transistor the resistive path is substantially interrupted.