An amplifier comprises: an input stage for receiving incoming signals; a high gain stage coupled to the input stage and providing driving signals in response to the incoming signals to an output driver stage; and an output terminal coupled to the output driver stage. The output driver stage comprises a high side driver circuit having a first terminal receiving a first driving signal pdrive from the high gain stage, a second terminal coupled VDD through a first voltage drop, and a third terminal coupled to the output terminal of the amplifier.