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differential signal

In order to compensate for the radiation of interference signals, differential signal transmission is used for the transmission of interference-sensitive signals on cables. This type of transmission

is a symmetrical transmission with signals in phase opposition. The two signals in phase opposition are transmitted on two signal-carrying wires

, i.e. if, for example, the signal on wire 1 is positive, the signal on wire 2 is negative. Differential

signal superimposed by an interference

signal superimposed by an interference

signal Interference signals, on the other hand, are radiated simultaneously with identical polarity on both wires.

Since only the level difference is amplified in the receiving device with a differential amplifier, interspersed interference signals or hum signals compensate each other. This property is also used for interference voltage suppression.

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Englisch: differential signal
Updated at: 08.11.2020
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