I-PCB iyingxenye ebalulekile ye-elekthronikhi kanye nomsuka wazo zonke izingxenye ze-elekthronikhi.Selokhu yavela emhlabeni wokugcina.Ukusuka kungqimba olulodwa kuya kungqimba oluphindwe kabili, ungqimba olune, bese kuya kwezingqimba eziningi, nobunzima bokuklama buyanda.enkulu.Kukhona izintambo ezinhlangothini zombili zephaneli ephindwe kabili, okuwusizo kakhulu kithi ukuba siqonde futhi sisebenzise isimiso sayo sezintambo.Ake sibheke isimiso sezintambo sebhodi eliphindwe kabili le-PCB.
Ibhodi eliphindwe kabili le-PCB eliphansi liklanywe ngendlela yocingo oluzungeza ukuma kwebhokisi, okungukuthi, uhlangothi lwe-PCB luhambisana kakhulu nomhlabathi, kanti olunye uhlangothi yibhodi yokukopisha yocingo lwaphansi olume mpo, bese luxhunywa ngokuphambana. nge-metalized vias (ukumelana nembobo kuncane).
Uma kucatshangelwa ukuthi kufanele kube nentambo yaphansi eduze kwe-chip ngayinye ye-IC, ngokuvamile ucingo oluphansi lwenziwa njalo ngo-1 ~ 115cm, okuzokwenza indawo yeluphu yesiginali ibe mncane futhi kusize ukunciphisa imisebe.Indlela yokuklama inethiwekhi kufanele ibe ngaphambi komugqa wesignali, ngaphandle kwalokho kunzima ukuyisebenzisa.
Isimiso sezintambo zomugqa wesiginali:
Ngemuva kokuthi ukwakheka okunengqondo kwezingxenye kunqunywa, kulandelwa ibhodi le-double-layer, bese kuklanywa ucingo oluvikela umhlabathi, bese kuba izintambo ezibalulekile (intambo ebucayi, i-high frequency wire kanye nocingo oluvamile ngemuva).Izintambo ezibalulekile kufanele zibe namandla ahlukene, ukubuyisela phansi, izintambo futhi zibe zifushane kakhulu, ngakho ngezinye izikhathi umhlabathi oseduze nentambo ebalulekile useduze nentambo yesignali ukuze kwakheke iluphu encane yokusebenza.
Ibhodi elinezingqimba ezine linendawo ephindwe kabili ephezulu, futhi phansi kwebhodi lezintambo kungumugqa wesignali.Okokuqala, indwangu yekristalu eyisihluthulelo, i-crystal circuit, iwashi lewashi, umugqa wesiginali namanye ama-CPU kumele ahambisane nomgomo wokuba indawo encane yokugeleza ngangokunokwenzeka.
Lapho isifunda sokuphrinta se-IC sisebenza, indawo yokujikeleza ikhulunywa izikhathi eziningi, empeleni okuwumqondo wemisebe yemodi yokuhlukanisa.Njengencazelo yemisebe yemodi yokuhlukanisa: umjikelezo osebenzayo wamanje ugeleza kumjikelezo wesignali, futhi iluphu yesiginali izokhiqiza imisebe ye-electromagnetic, ebangelwa imodi yokuhlukanisa yamanje, ngakho-ke iluphu yesiginali yemodi yokuhlukanisa kuthiwa yenziwa ngemisebe. imisebe, kanye nobukhulu benkundla yemisebe Ifomula yokubala ithi: E1 = K1, f2, ia/gamma
Uhlobo: I-E1 - ibhodi lokukopisha lemodi ehlukile, amandla enkundla yemisebe ye-gamma yendawo yesekethe ye-PCB ingabonwa ngefomula yemodi yokuhlukanisa imisebe, amandla enkundla yemisebe alingana nefrikhwensi yokusebenza f2, indawo yokujikeleza, kanye nokusebenza kwamanje, I njengokuthi kunini lapho kunqunywa khona umsebenzi I-frequency f kanye nobukhulu bendawo yokugeleza yizici ezibalulekile esingakwazi ukuzilawula ngokuqondile ekwakhiweni.Ngasikhathi sinye, inqobo nje uma umsebenzi wokugeleza uhlangabezana nokuthembeka, isivinini, kanye nokwamanje, okukhudlwana kuba ngcono, kuncipha ukushaya onqenqemeni lwesignali, ingxenye enkulu ye-harmonic, ububanzi, ukuphakama kwe-electromagnetic. ngemisebe, kufanele ikhonjiswe (ngenhla) amandla amakhulu wamanje, esingafuni.
Uma kungenzeka, zungeza ukuxhumana okubalulekile ngocingo oluphansi.Lapho uhambisa ibhodi lokukopisha le-PCB ngokulandelana, izintambo zomhlabathi ezitholakalayo zivala zonke izikhala, kodwa kufanele kuqashelwe zonke lezi zintambo eziphansi, izizathu zizokwakha ukuhlangana okufushane nokukhulu okuphansi kwe-impedance, okungafinyelela imiphumela emihle (Qaphela: Kunesidingo sesikhala okufanele kuhlangatshezwene nezimo, njengamabanga e-creepage).
Isikhathi sokuthumela: Jun-09-2022