In many circuits, including those operating in radio frequency (RF), there
is commonly a need to perform DC offset cancellation. The DC offset is an
error in an output signal in respect to the input that may cause a
circuit to enter into undesirable or non-tolerable conditions of
operation. While in most cases a static solution is provided the use of
an analog loop may be inappropriate because of the adverse impact on
speed. By adding a fast feedback loop finely impacting the adjustment of
an amplifier, both the initial calibration is achieved as well as a
recalibration of the system.