Kwihlabathi le-PCB, ngoMatshi, oneminyaka eli-19 ubudala, 2021

Xa usenza uyilo lwe-PCB, sisoloko sidibana neengxaki ezahlukeneyo, ezinjengokuthelekisa imithetho, i-EMI, inqaku lihlanganisene neminye imibuzo kunye neempendulo ezinxulumene wonke umntu, kwaye ndiyathemba ukuba iya kuba luncedo kuye wonke umntu.

1. Ucinga ukuba uqwalasela ukutshata okuphezulu xa uyila isikimo esiphezulu sePCB?
Xa uyilo lwesekethe elihamba ngesantya esiphezulu, ukuguqulwa komgangatho yenye yezinto zoyilo. Ixabiso lokunyanzela linolwalamano olupheleleyo lwendlela ye-wiring, njengokuhamba kwi-sunder yomhlaba (i-Microsprip), umgama ovela kwi-Wortine), umgama ovela kwi-Wiriline okanye i-Striner Striner), njl njl.

Oko kukuthi, ixabiso lokufumana linokumiselwa kuphela emva kwe-wiring. Ngokubanzi, isoftware yokulinganisa ayinakukwazi ukuthathela ingqalelo iimeko ezithile ze-wiris ezinqabileyo ngenxa yokuncitshiswa kweModeli yeSekethe okanye iMathematics Algorithm esetyenzisiweyo. Ngeli xesha, ezinye kuphela iitheyina (ukupheliswa), njengokuxhathisa ungcelele, kunokugcinwa kumzobo ochetyiweyo. Yilahle ifuthe lokungasebenzi kwi-trace. The real solution to the problem is to try to avoid impedance discontinuities when wiring.

2. Xa kukho iibhloko zedijithali zedijithali / ze-analog kwibhodi ye-PCB, eyona ndlela ikhoyo yokwahlula umhlaba wedijithali / ye-analog. Siyintoni isizathu?
Isizathu sokwahlula umhlaba wedijithali / ye-analog kungenxa yokuba isekethe yedijithali liya kuvelisa ingxolo emandleni nakumhlaba xa utshintshile phakathi kweendawo eziphakamileyo neziphantsi. Ubungakanani bengxolo inxulumene nesantya somqondiso kunye nobungakanani bexesha.

Ukuba inqwelomoya ayihlulwanga kwaye isandi esiveliswe yisekethe yendawo yedijithali sikhulu kwaye imijikelezo ye-Analog isondele kakhulu, nokuba imiqondiso ye-Analog isondele kakhulu, nokuba imiqondiso yedijithali ingayi kudibana, umqondiso we-analog uza kuphazamiseka yingxolo yomhlaba. Oko kukuthi, indlela engafundiswanga ye-digital in-to-den-to-den-towaint ingasetyenziswa kuphela xa indawo yesekelo ye-analog ikwindawo yesekethe evelisa ingxolo enkulu.

3. Kuyilo oluphezulu lwePCB, yeyiphi imiba ekufuneka uyilo uMyili aqwalasele i-EMC kunye neMithetho ye-EMI?
Ngokubanzi, uyilo lwe-EMI / le-EMC kufuneka luqwalasele zombini kwaye zenze izinto ngexesha elinye. Inxalenye yenxalenye ye-frequency ephezulu (> 30mhz) kwaye le yokugqibela yinxalenye esezantsi (<30mhz). Ke awukwazi ukunikela ingqalelo kwi-frequency ephezulu kwaye ungahoyi inxalenye ephantsi.

Uyilo olufanelekileyo lwe-EMI / le-EMC kufuneka luthathele ingqalelo indawo yesixhobo, ulungiselelo lwe-PCB lwe-PCB, indlela ebalulekileyo yoqhagamshelo, ukukhetha isixhobo, njl. Ekuqaleni kwesakhiwo. Ukuba akukho lungiselelo lingcono ngaphambili, liya kusonjululwa emva. Iya kufumana kabini isiphumo esiphindwe kabini ngesiqingatha semizamo kwaye yandise iindleko.

Umzekelo, indawo yomvelisi wewotshi akafanele ukuba kufutshane nesinxibelelanisi sangaphandle kangangoko kunokwenzeka. Iimpawu ezihamba ngesantya esiphezulu kufuneka ziye kungqingwana ongaphakathi kangangoko kunokwenzeka. Nika ingqalelo kwiMidyari yokuQalisa kunye nokuqhubeka kwesalathiso sokulungisa ukunciphisa ukubonakaliswa. Ireyithi yokulala yomqondiso otyhitywe sisixhobo kufuneka ibe mncinci kangangoko sinakho ukunciphisa ukuphakama. Amacandelo e-Roftware othi, xa ukhetha i-decoupitling / i-DEACSCASS, inike ingqalelo ukuba impendulo yayo rhoqo ihlangabezana neemfuno zokunciphisa ingxolo kwindiza yamandla.

Ukongeza, nikela ingqalelo kwi-RETALIN YOKUGQIBELA YOKUGQIBELA YOKUGQIBELA YOKUGQIBELA NGOKULULA I-LOOP incinci kangangoko kunokwenzeka (oko kukuthi, i-loop ithintele kancinci) ukunciphisa i-radiation. Umhlaba unokwahlulwa ukuze ulawule ingxolo enkulu. Okokugqibela, khetha ngokufanelekileyo umhlaba we-chassi phakathi kwe-PCB kunye nezindlu.

4. Xa usenza iibhodi zePCB, ukuze kuncitshiswe ukuphazamiseka, ngaba ucingo lomhlaba lufuna ifom evaliweyo?
Xa usenza iibhodi zePCB, indawo yeloop incitshiswa ukuze inciphise ukuphazamiseka. Xa ibeka umgca womhlaba, akufuneki ukuba ubekwe kwifom evaliweyo, kodwa kungcono ukuyicwangcisa kwimo yesebe, kwaye indawo yomhlaba kufuneka inyuswe kangangoko kunokwenzeka.

5. Ungahlengahlengisa njani i-quopology yokuhamba ukuze uphucule ingqibelelo?
Olu hlobo ulwalathiso lomqondiso lwenethiwekhi luyinkimbinkimbi ngakumbi, kuba imiqondiso engacacanga, yee-bidirecting, kunye nemiqondiso yamanqanaba ahlukeneyo, iimpembelelo ezinamacala ezi-topology zahlukile, kwaye kunzima ukuthi kuyingenelo kumgangatho wesigineli. Kwaye xa usenza i-pre-Simation, yeyiphi i-quindology ifunwa kakhulu kwiinjineli, ifuna ukuqonda imigaqo-siseko, iintlobo zesayizi, kunye nobunzima obuqhelekileyo.

6. Ungajongana njani nokubekwa kunye ne-wiring ukuqinisekisa ukuzinza kwemiqondiso ngaphezulu kwe-100m?
Eyona nto iphambili kwi-widi yedijithali yedijithali ephezulu kukunciphisa ifuthe lemigca yokuhambisa kumgangatho wesayini. Ke ngoko, ubume bemiqondiso yesantya esiphezulu ngaphezulu kwe-100m ifuna ukuba umqondiso ube mfutshane kangangoko kunokwenzeka. Kwisekethe zedijithali, imiqondiso yesantya esiphezulu ichazwa ngokuthi ixesha lokunyuka kwesonka.

Ngaphaya koko, iintlobo ezahlukeneyo zezibonakaliso (ezinje nge-TTL, GTL, LVTTL) zineendlela ezahlukeneyo zokuqinisekisa umgangatho womqondiso.