balun

[bal-uhn]
noun Electricity.
a device for converting a balanced line into an unbalanced line and vice versa.
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World English Dictionary
balun (ˈbælən)
 
n
electronics a device for coupling two electrical circuit elements, such as an aerial and its feeder cable, where one is balanced and the other is unbalanced
 
[C20: shortened from bal(anced to) un(balanced transformer)]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Computing Dictionary

balun definition

electronics
A transformer connected between a balanced source or load and an unbalanced source or load. A balanced line has two conductors, with equal currents in opposite directions. The unbalanced line has just one conductor; the current in it returns via a common ground or earth path.
(1996-10-17)

The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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Example sentences
The first balun provides common-mode rejection while the second is used in band-reject mode.
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