Common-mode signal: Difference between revisions

Revision as of 22:17, 27 November 2023

Revision as of 23:57, 27 November 2023

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In [[electrical engineering]], a '''common-mode signal''' is the identical component of [[voltage]] present at both input [[Terminal (electronics)|terminal]]s of an electrical device. In [[telecommunication]], the common-mode signal on a [[transmission line]] is also known as '''longitudinal voltage'''.

A common-mode signal is sometimes known as '''common-mode interference'''. Common-mode interference is interference that appears on both signal leads, or coherent interference that affects two or more elements of a network.

In most [[electrical circuit]]s the signal is transferred by a differential voltage between two [[Electrical conductor|conductors]]. If the voltages on these conductors are {{math|''U''₁}} and {{math|''U''₂}}, the common-mode signal is the [[Arithmetic mean|average]] of the voltages: