Bicc Public Limited Company

Bicc Plc

Howard Lawrence

In a 'Futurebus+' backplane, at each end of the backplane the signal lines are each electrically connected to a power bus on a face of the board or to a power plane encapsulated in the board via a discrete resistor mounted on the face of the board and separately formed with respect to the other resistors and the ground lines are each electrically connected to the power bus or power plane via a discrete capacitor mounted on the face of the board and separately formed with respect to the other capacitors. Preferably, at each end of the backplane the discrete resistors and capacitors are mounted on both faces of the board, the number on one face being approximately the same as the number on the other face. In the event that a resistor or capacitor should be faulty, only the signal or ground line to which the faulty resistor or capacitor is connected will be out of service until the faulty resistor or capacitor is replaced.

Termination of the signal and ground lines of a backplane

In a 'Futurebus+' backplane, at each end of the backplane the signal lines are each electrically connected to a power bus spaced from the rear face of the backplane via a discrete resistor which is housed in a throughbore in a body of electrically insulating material detachably secured to the rear face of the bakplane and which is electrically connected between the power bus and a pin soldered in a plated through hole and interconnected in the signal line. The ground lines are each connected to the power bus via a discrete capacitor which is housed in a throughbore in the body and which is electrically connected between the power bus and a pin soldered in a plated through hole and interconnected in the ground line. In the event that a resistor or capacitor should be faulty, only the signal or ground line to which the faulty resistor or capacitor is connected will be out of service until the faulty resistor or capacitor is replaced.

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Southampton, United Kingdom

Howard Lawrence