Adjustable balancing circuit for an adaptive hybrid and method of adjusting the same

摘要

An adjustable balancing circuit (900) for an adaptive hybrid is suitable for use with a two-conductor transmission line in full duplex communications. In a preferred example, the adjustable balancing circuit (900) includes a first impedance structure (902), a second impedance structure (904), a plurality of N resistor-inductor-capacitor (RLC) networks (908), a first plurality of N switch circuits (912), and a second plurality of N switch circuits (914). The first plurality of N switch circuits (912) switchably cascadingly couples the first plurality of N RLC networks (908) to a first end of the first impedance structure (902). The second plurality of N switch circuits (914) switchably couples a first end of the second impedance structure (904) to a first end of each RLC network. When properly configured, the adjustable balancing circuit (900) cancels reflected transmit signals caused by the presence of short bridged taps on the two-conductor transmission line.