Low-pass filter for ADSL telecommunications system, has longitudinal inductances in selected filter stages provided with parallel real resistances for improved reflection damping

摘要

The low-pass filter has at least 2 filter stages (A',B',C'), each provided with inductances (17) in the longitudinal circuit arms between the inputs and outputs, at least one of the filter stages containing a transverse capacitor (13). The inductances in at least one, but not all filter stages are combined with parallel real resistances (18).