An operational amplifier has a bias circuit, a differential amplifier, an
output stage, and a feed forward circuit. The bias circuit provides a
reference. The differential amplifier is coupled to a pair of input
terminals and provides a differential output based on the first and
second inputs. The output stage responds to the reference and to the
differential output so as to supply a current to an output terminal. The
feed forward circuit responds to the differential output in order to
increase and decrease current to the output terminal. As a result, the
feed forward circuit extends the dynamic range of the operational
amplifier.