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Em3rgent0rdr (talk | contribs) m "Half-sum" seems like a very obscure term. So I replaced with the more common term "average" hyperlinked to arithmetic mean. |
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'''Common-mode signal''' is the voltage common to both input terminals of an electrical device. In [[telecommunication]], the common-mode signal on a [[transmission line]] is also known as '''longitudinal voltage'''.
In most [[electrical circuit]]s the signal is transferred by a differential voltage between two conductors. If the voltages on these conductors are U<sub>1</sub> and U<sub>2</sub>, the common-mode signal is the
:<math>U_\text{cm} = \frac{U_1 + U_2}{2}</math>
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