Backplane definitions

An interconnecting device that has sockets for printed circuit boards to plug into.Passive and ActiveAlthough resistors may be used, a "passive" backplane adds no processing in the circuit. An "active" or "intelligent" backplane may have microprocessor or controller-driven circuitry that adds a little or a whole lot of processing. See bus.
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(electronics) A circuit board that connects several connectors in parallel to each other, so that each pin of each connector is linked to the same relative pin of all the other connectors, forming a computer bus.
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Origin of backplane

back +"Ž plane