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differential signal

To compensate for the radiation of interference signals, differential signal transmissionis used when transmitting interference-sensitive signals on cables. This type of transmission is a symmetrical transmission with signals in opposite phase.

The two signals in phase opposition are transmitted on two signal-carrying lines, which means, for example, that if the signal on line 1 is positive, the signal on line 2 is negative.

Differential signal superimposed by an interference signal

Differential 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 for each other. This property is also used for interference voltage suppression.

Informations:
Englisch: differential signal
Updated at: 08.11.2020
#Words: 116
Links: radiation (R), interference (I), signal, transmission, phase
Translations: DE
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