An offset correction analogic circuit capable of compensating the offset of a
digital baseband is described. The circuit comprises analog means to receive an
output differential signal issued from a differential signal path. The differential
signal path may be a baseband filter as used in digital communication systems.
The baseband filter inputs an input differential signal having an offset to be
compensated. The output differential signal is fed into an analog integrator to
generate a pulsed signal either on a first output line or on a second output line
according to the polarity of the output differential signal. The pulsed signal
is then integrated into a switched capacitor and a differential compensation offset
signal is issued. The frequency of the pulsed signal is preferably proportional
to the voltage value of the output differential signal. The compensation offset
signal may be summed with the input differential signal into a summing circuit.