Noun
phantom circuit (plural phantom circuits)
The equivalent of an additional electrical circuit or wire, in reality not existing, obtained by certain arrangements of real circuits, as in some multiplex telegraph systems.
However, "bunched pairs" can also refer to the straightforward connection of two lines in parallel which is not a phantom circuit and will not reduce the loading. Source: Internet
Here the phantom circuit is a third circuit derived from two suitably arranged pairs of wires, called side circuits, with each pair of wires being a circuit in itself and at the same time acting as one conductor of the third circuit. Source: Internet
Isolation between the phantom circuit and the side circuits relies on accurate balance of the line and transformers. Source: Internet
It is distinct from a phantom circuit in which the return current path for power or signaling is provided through different signal conductors. Source: Internet
It is theoretically possible to create a phantom circuit from two other phantom circuits and so on up in a pyramid with a maximum 2n-1 circuits being derived from n original circuits. Source: Internet