6 Umaleko FR4 ENIG Impedance Control PCB
PCB Impedance Line Design
1.Kwinkqubo yoHLELO lwePCB, qwalasela iimeko ezisisiseko ezifunekayo ukulawula i-impedance zezi: ububanzi bomgca, umgama womgca, ubude bomgca, umgca we-impedance okhuselayo, ngokuhambelana nezi mfuno ziya kufakwa kwindawo efanelekileyo yomgca we-impedance. .
2. Uluhlu lwereferensi ekhuselayo lukhetha ngokukhethekileyo umgca osecaleni kwinqanaba apho umgca we-impedance ukhona.Isikhundla esihambelanayo somgca we-impedance yiphepha elipheleleyo lobhedu, ukwenzela ukuba kuqinisekiswe ukuba ukuphambuka kwexabiso le-impedance kulawulwa.Kwimveliso yangempela, ngokwendlela yoyilo lwe-LAYOUT, iphepha elisondeleyo lobhedu kumgca we-impedance likhethwa njengoluhlu lwereferensi.Ukuba akukho phepha lobhedu kwindawo ehambelanayo, i-impedance ayikwazi ukulawulwa.Ukuba iphepha lobhedu alikwazi ukukhusela ngokupheleleyo umgca we-impedance, ukuphambuka kwe-impedance akulawuleki.
I-3, Ukusasazwa komgca we-impedance ingqalelo ekhethekileyo: i-impedance yeempawu ngumgca omnye kuphela, kufuneka kuphela ukuqwalasela ububanzi bomgca kunye nobude bomgca.Iimpedances ezahlukeneyo kufuneka iqulathe imigca emibini yomgca ofanayo ububanzi ngokuhambelana ngokupheleleyo omnye komnye.I-impedance yeCoplanar yintsebenziswano phakathi komgca kunye nobhedu lomhlaba, ngoko ke ububanzi bomgca kufuneka bufane, amacala omabini omgca ajikelezwe ngobhedu lomhlaba, kwaye umgama ukusuka kumgca ukuya kubhedu lomhlaba ufana ngqo ukusuka. ukuqala ukuya ekugqibeleni.
Yintoni i-Impedance Control kwi-PCB esetyenziselwa ntoni?
I-impedance elawulwayo ikhethwa xa umqondiso kufuneka ube ne-impedance ethile ukuze usebenze ngokufanelekileyo.Kwizicelo eziphezulu ze-frequency, i-impedance eqhubekayo kufuneka igcinwe kwibhodi yonke ukuqinisekisa ukunyaniseka kwedatha edlulisiweyo kunye nokucaca komqondiso.Ubude bendlela yomqhubi okanye i-frequency ephezulu, uhlengahlengiso olungakumbi luyafuneka.Ukungabikho kobungqongqo kule nqanaba kunokunyusa ixesha lokutshintsha kwesixhobo sombane okanye isekethe kwaye kukhokelela kwiimpazamo ezingalindelekanga.
I-impedance engalawulwayo kunzima ukuyihlalutya emva kokuba amacandelo ahlanganiswe kwisekethe.Amacandelo anoluhlu oluhlukeneyo lokunyamezela ngokuxhomekeke kwiqashiso.Ukongezelela, iimpawu zabo zinokuchaphazeleka ngokuguquguquka kweqondo lokushisa, elinokubangela ukungasebenzi kakuhle.Kule meko, ukutshintshwa kwecandelo kubonakala kuyisisombululo, kodwa ngokwenene yi-impedance eyaneleyo ye-wiring ye-conductor ingxaki.
Ngoko ke, uyilo lwe-PCB kufuneka lujonge i-impedance ye-conductor wiring kunye nokunyamezela kwayo kwangaphambili ukuqinisekisa ukuba amaxabiso ecandelo ahlangabezana neemfuno.
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PCB Manufacturing base
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