LOOP DRIVER FOR POTS, XDSL, OR INTEGRATED POTS/XDSL INTERFACE

摘要

A driver circuit comprising a transformer having a primary winding for coupling to a subscriber loop and a secondary winding for coupling to an interface circuit, a feedback circuit for coupling said primary winding to said secondary winding to provide a predetermined impedance match between said interface circuit and said loop over a predetermined frequency band of said circuit. In a preferred embodiment, the interface circuit is an integrated line card for supporting both POTS and ADSL.