Abstract: 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.

Abstract: An interface assembly for use with a current mode data bus. The interface assembly 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.

Abstract: A servo system simulator utilizing an electronic equivalent of the servomotor to drive a programmable electronic load which mimics the actual load encountered by the servo system simulated.

Abstract: An apparatus for converting digital signals into analog pulse width modulated signals without a D/A Converter includes an up-down counter, programmed by the digital signal, which provides a signal to logic circuitry at the conclusion of each count. The logic circuitry responds to the counter signal and clock signals coupled thereto to provide an analog pulse width modulated signal corresponding to the digital signal.