Current mode data bus incorporating integrated coupler circuitry

摘要

An interface assembly, which may be used with a current mode data bus, couples to an existing current mode data bus and includes a length of unshielded data bus disposed on a printed circuit board. A plurality of coupler magnetic assemblies are disposed on the circuit board and interface with the unshielded portion of the data bus. A corresponding plurality of coupler circuits are disposed on the circuit board and each cooperate with an associated one of the coupler magnetic assemblies. Providing all of the coupler magnetic assemblies and coupler circuits on the printed circuit board reduces the susceptibility of the unshielded data bus portion to EMI and enables more consistent data channel characteristics to be achieved. An alternative embodiment includes an entire current mode data bus formed on a printed circuit board with terminators at each end of an unshielded portion of the data bus.