Hybrid coil

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A hybrid coil (or bridge transformer, or sometimes hybrid) is a single transformer that has three windings, and which is designed to be configured as a circuit having four branches, (i.e. ports) that are conjugate in pairs. The primary use of a hybrid coil is to convert between 2-wire and 4-wire operation in sequential sections of a communications circuit. Such conversion is necessary when repeaters are introduced in a 2-wire circuit.

This article contains material from the Federal Standard 1037C (in support of MIL-STD-188), which, as a work of the United States Government, is in the public domain.

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