Xa uyila iisekethe zePCB ezinesantya esiphezulu, ukuthelekisa i-impedance yenye yezinto zoyilo.Ixabiso le-impedance linobudlelwane obupheleleyo kunye nendlela yocingo, njengokuhamba kwi-surface layer (microstrip) okanye i-inner layer (i-stripline / i-stripline ephindwe kabini), umgama ukusuka kuluhlu lwereferensi (umaleko wamandla okanye umaleko womhlaba), ububanzi be-wiring, izinto zePCB. , njl. Zombini ziya kuchaphazela ixabiso leempawu zokuthintela umkhondo.

Oko kukuthi, ixabiso le-impedance linokumiselwa emva kwe-wiring.Ngokuqhelekileyo, isofthiwe yokulinganisa ayikwazi ukuqwalasela ezinye iimeko ze-wiring kunye ne-impedance engapheliyo ngenxa yokunciphisa imodeli yesiphaluka okanye i-algorithm yemathematika esetyenzisiweyo.Ngeli xesha, kuphela ezinye i-terminators (ukupheliswa), ezifana nokuchasana kochungechunge, zinokugcinwa kwi-diagram yesikimu.Nciphisa isiphumo sokungaqhubeki kwi-trace impedance.Isisombululo sokwenyani kwingxaki kukuzama ukunqanda ukungaqhubeki kwe-impedance xa i-wiring.