An amplifier (210) includes an input stage (310, 320) and an output stage (330). The input stage (310, 320) has an input for receiving an input signal, and an output. The output stage (330) has an input coupled to the output of the input stage (310, 320), and an output for providing an amplified output signal. The output stage (330) includes a gain stage and a bias circuit. The gain stage has an input forming the input of the output stage, an output for providing the amplified output signal, and a first bias terminal. The bias circuit has a first output terminal coupled to the first bias terminal of the gain stage. During a turn-on period the bias circuit gradually ramps the first bias terminal from a first initial voltage to a first bias voltage.