Kuva kuri PCB Isi

1. Nigute ushobora gutekereza kuri inzemu zihuye mugihe ushushanya-yihuta pcb ishusho ya pcb igishushanyo?

Iyo ushushanyijeho umuvuduko wihuta PCB, guhuza amakuru nimwe mubintu bishushanyije. Agaciro kabuza gafite umubano wuzuye nuburyo bwo kwizinga, nko kugenda hejuru yubuso (microstrip), ibikoresho byinkuta), ibikoresho byintwaro), nibindi byombi bizagira ingaruka kumiterere ibangamira agaciro ka the.

Ibyo ni ukuvuga, agaciro ka impetomu birashobora kugenwa nyuma yo kubyihangana. Mubisanzwe, software yo kwigana ntishobora kuzirikana imiterere yububiko budashoboka kubera imipaka yicyitegererezo cyumuzunguruko cyangwa imibare yakoreshejwe. Muri iki gihe, bamwe mu bategura (kurangiza), nko kurwanya urukurikirane, burashobora kubikwa ku gishushanyo cya Schematic. Kugabanya ingaruka zo guhagarika mu mpongano. Igisubizo nyacyo kubibazo nukugerageza kwirinda guta agaciro mugihe unywa.
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2. Iyo hari imikorere myinshi ya digitale / analoge mu kibaho cya PCB, uburyo busanzwe nugutandukanya ubutaka bwa digitale / Analog. Impamvu niyihe?

Impamvu yo gutandukanya ubutaka bwa digitale / analog ni ukubera ko umuzenguruko wa digitale uzabyara urusaku mububasha nubutaka mugihe cyo guhinduranya ubushobozi bwo hejuru kandi buke. Ubunini bwurusaku bufitanye isano numuvuduko wikimenyetso nubunini bwiki gihe.

Niba indege yubutaka itagabanijwe kandi urusaku rutangwa na Digital Crocecle Offic kandi imirongo ya Analog iri hafi cyane, nubwo ibimenyetso bya Digital-Kugereranya Digital bikaba byambukiranya urusaku rwubutaka. Nukuvuga, uburyo butagabanijwe-kuri-analog bushobora gukoreshwa gusa mugihe agace k'umuzunguruko ka Analog turi kure yububiko bwumuzunguruko bitanga urusaku runini.

3. Mu buryo bwihuse bwa PCB, niyihe ngingo Ukwiye gusuzuma amategeko ya EMC na EMI?

Mubisanzwe, umushushanyo wa EMI / EMC akeneye gusuzuma byombi kandi bikozwe mubikorwa icyarimwe. Uwambere ni uw'ibice byinshi (> 30mhz) hanyuma ibya nyuma ni igice cyo hepfo (<30mhz). Ntushobora rero kwitondera inshuro nyinshi kandi wirengagize inshuro nke.

Igishushanyo cyiza cya EMI / EMC kigomba kuzirikana aho igikoresho, pcb stack gahunda, uburyo bwingenzi bwo guhuza, guhitamo ibikoresho, nibindi gutangira imiterere. Niba nta gahunda nziza imeze mbere, bizakemurwa nyuma. Bizagenda kabiri ibisubizo hamwe na kimwe cya kabiri cyimbaraga kandi byongera ikiguzi.

Kurugero, umwanya wa generator yisaha ntigomba kuba hafi yumuhuza wo hanze bishoboka. Ibimenyetso byihuta-byihuta bigomba kujya kumurongo w'imbere bishoboka. Witondere guhuza ibiranga no gukomeza kumurongo wo kugabanya ibitekerezo. Igipimo cyizitirirwa ibimenyetso gisunitswe nigikoresho kigomba kuba gito gishoboka kugirango ugabanye uburebure. Ibigize inshuro, mugihe uhisemo gutesha agaciro / kwanguka, witondere niba igisubizo cyacyo cyujuje ibisabwa kugirango ugabanye urusaku ku ndege.

Byongeye kandi, witondere inzira yo kugaruka yikimenyetso-cyinshi cyo gukora kugirango ugire ikibanza gito gito gishoboka (ni ukuvuga, impengamiro ya ntoya ishoboka) kugirango igabanye imirasire. Ubutaka nabwo bushobora kugabanywa kugirango bugere ku rusaku rwo hejuru. Hanyuma, hitamo neza Chassis ahantu hagati ya PCB n'amazu.
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4. Mugihe cyo gukora ikibaho cya PCB, kugirango ugabanye kwivanga, nkuko ubutaka bukwiye bukwiye buryo bufunze?

Mugihe ukora imbaho ​​za PCB, ahantu hashyizwe ahagaragara muri rusange hagamijwe kugabanya kwivanga. Iyo ushizeho umurongo, ntibigomba gushyirwaho muburyo bufunze, ariko nibyiza kubitegura muburyo bwinyamanswa, kandi ubuso bwubutaka bugomba kwiyongera bishoboka.

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5. Nigute ushobora guhindura inzira Topologiya kugirango utezimbere ubunyangamugayo?

Ubu bwoko bw'ibimenyetso by'ibimenyetso biragoye, kubera ibimenyetso bidasubirwaho, bisukuye, hamwe n'urwego rutandukanye rw'ibimenyetso, kandi biragoye kubivuga kuri topologiya ifitiye ubuziranenge. Kandi iyo gukora mbere yo kwigana, topologiya kugirango ukoreshe birasaba cyane abashinzwe injeniyeri, bisaba gusobanukirwa amahame yumuzunguruko, ubwoko bwamakuru ibimenyetso, ndetse no kwihanganira bigoye.
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6.

Urufunguzo rwo kwihuta-kwihuta kwa digitale ni ukugabanya ingaruka kumirongo yohereza ku buziranenge. Kubwibyo, imiterere yikintu cyihuse hejuru ya 100m gisaba ibimenyetso byerekana ibimenyetso bigufi bishoboka. Mu mpetizo za digitale, ibimenyetso byihuta byihuta bisobanurwa no gutinda gutinda.

Byongeye kandi, ubwoko butandukanye bwibimenyetso (nka TTL, GTL, LVTTL) bafite uburyo butandukanye kugirango tumenye neza ubuziranenge.