Common-mode filtering for converting differential signaling to single-ended signaling

An interface in a radiofrequency (RF) wireline automotive communications network system, for coupling an electronic device disposed in the automotive communications network system to a differential wireline channel medium of the automotive communications network system, the interface comprising:

• a physical layer transceiver configured for coupling between the differential wireline channel medium and the electronic device disposed in the automotive communications network system, the physical layer transceiver being an integrated circuit device configured for coupling to the differential wireline channel medium;
• first and second differential input/output conductors coupled to the physical layer transceiver and configured to extend toward the electronic device;
• a shielded single-ended conductor coupled to a first one of the first and second differential input/output conductors and configured for coupling to the electronic device;
• and
• an impedance element configured to terminate a second one of the first and second differential input/output conductors, that is coupled to the physical layer transceiver, to a ground of the communications system between (a) the physical layer transceiver to which the second one of the first and second differential input/output conductors is coupled and (b) the electronic device toward which the second one of the first and second differential input/output conductors is configured to extend.