Ha o rala li-circuits tsa PCB tse lebelo le holimo, ho tsamaisana ha impedance ke e 'ngoe ea likarolo tsa moralo.Boleng ba impedance bo na le kamano e felletseng le mokhoa oa wiring, joalo ka ho tsamaea holim'a lera (microstrip) kapa lera le ka hare (stripline/double stripline), hole le lera la litšupiso (matla a matla kapa lera la fatše), bophara ba wiring, lisebelisoa tsa PCB. , joalo-joalo

Ka mantsoe a mang, boleng ba impedance bo ka khethoa ka mor'a wiring.Ka kakaretso, software ea ho etsisa ha e khone ho ela hloko maemo a mang a wiring a nang le impedance e sa khaotseng ka lebaka la moeli oa mokhoa oa potoloho kapa algorithm ea lipalo e sebelisoang.Ka nako ena, ke li-terminator tse ling feela (ho felisoa), joalo ka letoto la ho hanyetsa, li ka bolokoa setšoantšong sa schematic.Fokotsa phello ea ho se tsoele pele ho latella impedance.Tharollo ea 'nete bothateng ke ho leka ho qoba li-impedans discontinuities ha u sebelisa wiring.