Uma kukhulunywa nge-impedance, onjiniyela abaningi banezinkinga eziningi ngayo.Ngoba kukhona okuguquguqukayo okuningi okuthinta inani le-impedance elawulwayo ebhodini lesifunda eliphrintiwe, noma kunjalo, yini i-impedance futhi yini okufanele siyicabangele lapho kulawulwa impedance?
Incazelo ye-Impedance?
I-impedance iyisamba sokumelana nokusabela kwesekethe kagesi elinganiswa nge-Ohms.I-impedance isici samanje esishintshayo lapho imvamisa yesignali iyingxenye ebalulekile.Uma i-trace ithatha isikhathi eside noma iphakama i-frequency, kubaluleke kakhulu ukulawula i-trace impedance.Imvamisa yesignali iyisici esibalulekile sokulandela umkhondo okuxhuma kuzingxenye ezidinga amakhulu amabili kuya kwamathathu ama-MHz noma ngaphezulu.
Ukucushwa komkhondo okuhlukahlukene kuzosetshenziswa kumabhodi esekethe aphrintiwe ukuze kuzuzwe i-impedance elawulwayo.Singakwazi ukulawula i-impedance ngokusebenzisa izikhala kanye nobukhulu bokulandelela ibhodi lesifunda.
I-Impedans Control Level iyatholakala
Ngokuvamile, kunamazinga amathathu okulawulwa kwe-impedance atholakalayo kumabhodi wesifunda aphrintiwe.
1. Ukulawulwa kokuphazamiseka
Ukulawulwa kwe-Impedans kusetshenziswe kabanzi kumiklamo ephezulu ngokubekezelelana okuqinile noma ukucushwa okungavamile.Kunezinhlobo eziningana ezahlukene impedance elawulwa.Lapho i-impedance yesici isetshenziswa khona.Ezinye izinhlobo zifaka i-wave impedance, impedance yesithombe, ne-impedance yokufaka.
2. Ukubuka Kwe-Impedans
Ukubuka kwe-Impedans kusho ukuhambisana ku-impedance.I-impedance control trace izonqunywa ububanzi bokulandelela kanye nokuphakama kwe-dielectric, engalungiswa njengoba kudingeka.
3. Akukho Impedans Control
Ngenxa yokuthi ukubekezelelana kwe-impedance ekwakhiweni akuqinile, ukuvimbela okulungile kungafinyelelwa ngokuhambisana nokucaciswa okujwayelekile ngaphandle kokulawulwa kwe-impedance.I-impedance enembile inganikezwa umenzi we-PCB ngaphandle kwezinyathelo ezengeziwe, Ngakho-ke, izinga elingabizi kakhulu.
Ukubaluleka Kokunemba kokulawulwa kwe-impedance
Ukubaluleka kokunemba kubaluleke kakhulu ukuze amabhodi e-impedance alawulwayo asebenze ngendlela efanele.ngoba abaklami be-PCB kufanele bacacise ukuthintana komkhondo nokubekezelelana okudingekayo.
Eminye imibuzo mayelana nokulawulwa kwe-impedance, ungathintana nethimba lonjiniyela ku-PHILIFAST, bazokunikeza isixazululo esingcono kakhulu mayelana namabhodi akho e-PCB.
Isikhathi sokuthumela: Jun-21-2021