A bias current generator for generating bias current is described. The generator comprises an amplifier having an inverting input, a non-inverting input and an output. A first bipolar transistor is associated with one of the inverting and non-inverting inputs of the amplifier. A load MOS device is associated with the other one of the inverting and non-inverting inputs of the amplifier. The load MOS device is driven by the amplifier to operate in the triode region with a corresponding drain-source resistance ron. The first bipolar transistor and the load MOS device are arranged such that a voltage derived from the first bipolar transistor is developed across the drain-source resistance ron of the load MOS device thereby generating a bias current.