Patent 7809216 was granted and assigned to Photonic Systems, Inc. on October, 2010 by the United States Patent and Trademark Office.
A signal interface includes a dual-drive device having a first and a second input port that receive an outgoing signal. One of the first and the second input ports also receive an incoming signal. The dual-drive device passes the incoming signal to an output port while isolating the outgoing signal from the incoming signal.