Operation Amplifiers inEMIFilter Insertion LossMeasurement Setup
Jiir · 2007
Thepaperdeals withthemeasuring oftheEMI Nowadays itispossible tothink aboutreplacing filters insertion loss. Twovariations ofdifferential mode impedance transformers bynewmodemactive devices. measurement setupsare compared.ImpedanceThesecomponents worknowathigher frequency. Atthe transformers areusedinthefirst setup. Active devicesmarket, theamplifiers withthesymmetrical output which (operational amplifiers) wereusedin alternative arenecessary fortransformers replacement areavailable. measurement setupinstead ofimpedance transformers. Theseamplifiers areusedforgenerating symmetrical test This replacement wasdoneforthe50Qdifferential mode signals. insertion lossmeasurement setup. Theperformance of modified measurement setup wastested onseveral single phase EMIfilters. Theobtained data werecompared with 2. ChoiceofSuitable Operational datataken inthesetup withimpedance transformers. Amplifiers Firstly ithastobesaid that transformers canswap places inthemeasuring system. Itmeansthatthe Keywords transformer usedattheinput could beusedattheoutput of thefilter (andviceversa). Thiswill notbepossible inthe Elect,eroagticl cmpatibil, E