transformer

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transformer

 [trans-for´mer]
an induction apparatus for changing electrical energy at one voltage and current to electrical energy at another voltage and current, through the medium of magnetic energy, without mechanical motion.
step-down transformer one for lowering the voltage of the original current.
step-up transformer one for raising the voltage of the original current.
References in periodicals archive ?
They cover magnetic materials; balun, hybrids, and anti-phase power splitters; transmission line transformers; hybrid power combiners and splitters; and quadrature combiners and splitters.
Functionally, these line transformers isolate the telephone line from the analog driver and receiver.