hardware A kind of electrical connection using two wires,

one of which carries the normal signal (V) and the other

carries an inverted version the signal (-V). A differential

amplifier at the receiver subtracts the inverted signal from

the normal signal to yield a signal proportional to V. This

subtraction is intended to cancel out any noise induced in the

wires, on the assmption that the same level of noise will have

been induced in both wires. Twisted pair wiring is often

used to try to ensure that this is the case.