An amplifier circuit includes an amplifier stage (10) having an amplifier transistor (104) with a gate coupled to an input (100) of the amplifier stage, a source coupled to a reference connection (gnd) and a drain coupled to a positive power supply connection (V+). The amplifier circuit includes a bias stage (12) having a bias transistor (120), a drain resistance (124) and a source resistance (122). The bias transistor includes a gate coupled to a negative power supply connection (V−), a source coupled to the negative power supply connection (V−) via the source resistance and a drain coupled to the reference connection via the drain resistance and to the gate of the amplifier transistor. The bias stage includes a further resistance (20, 22) coupled from a node between the source of the bias transistor and the source resistance of the bias transistor to a circuit node that carries a voltage higher than the voltage at the negative power supply connection.