an amplifier including first and second transistors coupled in a stacked configuration;

a first current mirror having a first control loop and a first mirror transistor coupled to a terminal of the first transistor to provide a first bias current, wherein the first current mirror includes the first mirror transistor, a first fixed current source, and a first follower transistor coupled to the first mirror transistor in a follower configuration;

a second current mirror having a second control loop and a second mirror transistor coupled to a terminal of the second transistor to provide a second bias current; and

a reference transistor coupled to the first and second current mirrors.