EMC yog lub npe luv ntawm Electromagnetic Compatibility. Nws txhais tau tias "tsis muaj hluav taws xob cuam tshuam rau lwm yam khoom siv, thiab qhov kev ua tau zoo ntawm cov khoom qub yog tswj hwm txawm tias electromagnetic cuam tshuam los ntawm lwm yam khoom siv tau txais". Nws yog hu ua "electromagnetic compatibility" vim nws yuav tsum muaj ob qho kev ua yeeb yam.
"Tsis txhob ua rau electromagnetic cuam tshuam rau lwm yam khoom siv" txhais tau hais tias yog tias qhov kev ua haujlwm no tsis paub meej, nws yuav ua rau electromagnetic cuam tshuam rau lwm yam khoom siv. EMI yog ib lo lus uas sawv cev rau kev cuam tshuam electromagnetic. Vim tias qhov emission ntawm electromagnetic tsis tuaj yeem ua rau muaj kev cuam tshuam, nws feem ntau siv ua ke nrog lub sij hawm Emission. Nyob rau hauv cov nqe lus ntawm switching fais fab mov, nws yog hais txog lub switching suab nrov tshwm sim los ntawm on/off ua hauj lwm.
Lub sij hawm rov qab "txawm tias muaj kev cuam tshuam electromagnetic los ntawm lwm yam khoom siv" yog EMS - Electromagnetic Susceptibility. EMS feem ntau yog siv ua khub nrog kev tiv thaiv kab mob (kev ua siab ntev, kev tiv thaiv, kev muaj peev xwm cais tawm). Nws yuav tsum muaj peev xwm tiv taus "txawm tias nws raug rau EMI, nws yuav tsis ua teeb meem xws li kev ua haujlwm tsis zoo."
EMI tau muab faib ua ob hom: Ua Emission thiab Radiated Emission. Cov emissions yog hais txog lub suab nrov uas yog ua los ntawm cov xov hlau lossis PCB board thaiv. Radiated emission hais txog lub suab nrov emitted (radiated) rau hauv ib puag ncig. Rau cov suab nrov no, muaj kev tiv thaiv kev tiv thaiv hauv EMS. Lawv txoj kev sib raug zoo yog raws li nram no.
