Balun

A balun, pronounced // ("bal-un"), is a passive electronic device that converts between balanced and unbalanced electrical signals. They often also change impedance. Baluns can take many forms and their presence is not always obvious. They always involve some form of electromagnetic coupling.
See more at Wikipedia.org...

Abbreviation for balanced to unbalanced. In radio frequency usage, a device used to couple a balanced device or line to an unbalanced device or line. (188 )

<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)

balun
(Tech) bộ biến thế cân bằng (từ vào đối xứng ra không đối xứng)
(C) 2007 www.TừĐiểnTiếngViệt.net

BALANCED UNBALANCED (DEVICE). BALUN