Lub hauv paus ntsiab lus twg yuav tsum ua raws li hauv pcb tsim?

I. Pib Qhia

Txoj hauv kev los txwv kev cuam tshuam ntawm lub PCB pawg thawj coj saib yog:

1. Txo qhov chaw ntawm qhov sib txawv hom teeb liab voj.

2. Txo cov suab nrov nrov rov qab (filtering, cais thiab sib txuam).

3. Txo cov hom hluav taws xob ntau (tsim av). 47 cov hauv paus ntsiab lus ntawm kev kub ceev PCB EMC tsim II. Cov ntsiab lus ntawm PCB tsim qauv

ipcb ib

Lub hauv paus ntsiab lus 1: PCB moos zaus tshaj 5MHZ los yog lub teeb liab nce lub sij hawm tsawg dua 5ns, feem ntau yuav tsum tau siv ntau txheej board tsim.

Yog vim li cas: thaj tsam ntawm lub teeb liab lub voj voog tuaj yeem tswj tau zoo los ntawm kev siv ntau txheej txheej board tsim.

Lub hauv paus ntsiab lus 2: Rau cov txheej txheem ntau txheej, cov txheej txheem tseem ceeb ntawm cov kab hluav taws xob (cov khaubncaws sab nraud povtseg ntawm cov kab moos, cov tsheb npav, cov kab teeb liab sib txuas, xov tooj cua zaus kab, rov pib dua cov kab teeb liab, nti xaiv cov kab teeb liab, thiab ntau cov kab teeb liab nyob hauv) yuav tsum nyob ib sab. mus rau lub dav hlau av tiav. Zoo dua ntawm ob lub dav hlau hauv av.

Yog vim li cas: Cov kab teeb liab tseem ceeb feem ntau muaj hluav taws xob muaj zog lossis cov kab teeb liab tsis tshua muaj siab heev. Kev xaim ze rau lub dav hlau hauv av tuaj yeem txo cov teeb liab voj voog thaj tsam, txo cov hluav taws xob siv hluav taws xob lossis txhim kho lub peev xwm tiv thaiv kev cuam tshuam.

Txoj Cai 3: Rau ib txheej txheej boards, ob sab ntawm cov teeb liab tseem ceeb yuav tsum tau them nrog hauv av.

Yog vim li cas: Lub teeb liab tseem ceeb yog npog nrog av ntawm ob sab, ntawm ib sab, nws tuaj yeem txo qhov chaw ntawm lub teeb liab voj, thiab ntawm qhov tod tes, nws tuaj yeem tiv thaiv crosstalk ntawm cov teeb liab kab thiab lwm yam teeb liab kab.

Lub hauv paus ntsiab lus 4: Rau lub rooj tsavxwm ob-txheej, ib cheeb tsam loj ntawm av yuav tsum tau muab tso rau ntawm lub dav hlau projection ntawm cov kab teeb liab tseem ceeb, lossis tib yam li lub rooj tsav xwm ib leeg.

Yog vim li cas: tib yam li cov teeb liab tseem ceeb ntawm lub rooj tsav xwm multilayer nyob ze rau hauv av dav hlau.

Lub hauv paus ntsiab lus 5: Nyob rau hauv lub rooj tsavxwm multilayer, lub dav hlau fais fab yuav tsum tau thim rov qab los ntawm 5H-20H txheeb ze rau nws cov dav hlau hauv av uas nyob ib sab (H yog qhov kev ncua deb ntawm lub hwj chim thiab lub dav hlau hauv av).

Yog vim li cas: Lub indentation ntawm lub hwj chim dav hlau txheeb ze rau nws rov qab hauv av dav hlau tuaj yeem tiv thaiv qhov teeb meem ntawm ntug hluav taws xob.

Lub hauv paus ntsiab lus 6: Lub dav hlau projection ntawm cov hlau txheej yuav tsum nyob rau hauv cheeb tsam ntawm lub dav hlau reflow txheej.

Yog vim li cas: Yog hais tias cov txheej thaiv tsis nyob rau hauv qhov projection cheeb tsam ntawm lub dav hlau reflow txheej, nws yuav ua rau cov ntug hluav taws xob teeb meem thiab ua rau kom lub teeb liab voj cheeb tsam, uas yuav ua rau kom muaj zog sib txawv hom hluav taws xob.

Lub hauv paus ntsiab lus 7: Nyob rau hauv ntau txheej boards, yuav tsum tsis txhob muaj cov kab teeb liab loj dua 50MHZ ntawm TOP thiab BOTTOM txheej ntawm ib lub rooj tsavxwm. Yog vim li cas: Nws yog qhov zoo tshaj plaws los taug kev cov teeb liab siab zaus ntawm ob txheej txheej dav hlau kom txwv nws cov hluav taws xob mus rau qhov chaw.

Lub hauv paus ntsiab lus 8: Rau ib lub rooj tsavxwm nrog lub rooj tsavxwm ua haujlwm zaus ntau dua 50MHz, yog tias txheej thib ob thiab txheej txheej kawg yog cov txheej thaiv, cov txheej sab saum toj thiab khau raj yuav tsum tau them nrog cov ntawv ci tooj liab.

Yog vim li cas: Nws yog qhov zoo tshaj plaws los taug kev cov teeb liab siab zaus ntawm ob txheej txheej dav hlau kom txwv nws cov hluav taws xob mus rau qhov chaw.

Lub hauv paus ntsiab lus 9: Nyob rau hauv ib lub rooj tsavxwm multilayer, lub dav hlau ua haujlwm tseem ceeb (lub dav hlau siv dav dav) ntawm ib lub rooj tsavxwm yuav tsum nyob ze rau nws lub dav hlau hauv av.

Yog vim li cas: Lub dav hlau fais fab uas nyob ib sab thiab lub dav hlau hauv av tuaj yeem txo qhov voj voog ntawm lub zog hluav taws xob.

Lub hauv paus ntsiab lus 10: Hauv ib txheej txheej txheej, yuav tsum muaj cov xaim hauv av nyob ib sab thiab sib npaug rau cov kab hluav taws xob.

Yog vim li cas: txo qhov chaw ntawm lub hwj huam mov tam sim no voj.

Txoj Cai 11: Nyob rau hauv lub rooj tsavxwm ob-txheej, yuav tsum muaj ib lub hauv av xaim ntawm ib sab thiab sib npaug rau cov kab hluav taws xob.

Yog vim li cas: txo qhov chaw ntawm lub hwj huam mov tam sim no voj.

Txoj Cai 12: Nyob rau hauv cov txheej txheem tsim, sim zam cov txheej thaiv uas nyob ib sab. Yog tias nws tsis tuaj yeem zam tau tias cov kab hluav taws xob nyob ib sab ntawm ib leeg, cov txheej txheem sib nrug ntawm ob txheej thaiv yuav tsum tau nce kom tsim nyog, thiab cov txheej txheem sib nrug ntawm cov txheej thaiv thiab nws cov teeb liab Circuit Court yuav tsum raug txo kom tsawg.

Yog vim li cas: Parallel teeb liab kab ntawm cov kab txuas uas nyob ib sab tuaj yeem ua rau teeb liab crosstalk.

Txoj Cai 13: Cov txheej txheem dav hlau uas nyob ib sab yuav tsum tsis txhob sib tshooj ntawm lawv cov phiaj xwm dav hlau.

Yog vim li cas: Thaum qhov projections sib tshooj, lub coupling capacitance ntawm cov khaubncaws sab nraud povtseg yuav ua rau lub suab nrov ntawm cov khaubncaws sab nraud povtseg rau ob leeg ib leeg.

Lub hauv paus ntsiab lus 14: Thaum tsim cov txheej txheem PCB, ua tib zoo saib xyuas lub hauv paus ntsiab lus ntawm kev tso rau hauv ib txoj kab ncaj nraim raws lub teeb liab khiav kev taw qhia, thiab sim kom tsis txhob looping rov qab.

Yog vim li cas: Tsis txhob ncaj qha teeb liab coupling thiab cuam tshuam cov teeb liab zoo.

Lub hauv paus ntsiab lus 15: Thaum ntau lub modules tau muab tso rau hauv tib lub PCB, cov circuits digital thiab analog circuits, thiab high-speed thiab low-speed circuits yuav tsum tau muab tso rau nyias.

Yog vim li cas: Tsis txhob muaj kev cuam tshuam ntawm kev cuam tshuam ntawm digital circuits, analog circuits, high-speed circuits, thiab low-speed circuits.

Lub hauv paus ntsiab lus 16: Thaum muaj qhov siab, nruab nrab, thiab qis-ceev circuits ntawm lub rooj tsav xwm Circuit Court tib lub sijhawm, ua raws li kev kub ceev thiab nruab nrab-ceev circuits thiab nyob deb ntawm lub interface.

Yog vim li cas: Tsis txhob muaj lub suab nrov hauv Circuit Court los ntawm hluav taws xob mus rau sab nraud los ntawm lub interface.

Lub hauv paus ntsiab lus 17: Lub zog cia thiab cov khoom siv hluav taws xob ntau zaus yuav tsum tau muab tso rau ze ntawm cov khoom siv hluav taws xob lossis cov khoom siv nrog cov kev hloov pauv loj tam sim no (xws li cov khoom siv hluav taws xob: cov khoom siv hluav taws xob thiab cov khoom siv hluav taws xob, cov kiv cua thiab cov relays).

Yog vim li cas: Lub hav zoov ntawm lub zog cia capacitors tuaj yeem txo cov voj voog ntawm cov voj voog loj tam sim no.

Lub hauv paus ntsiab lus 18: Lub lim Circuit Court ntawm lub hwj chim input chaw nres nkoj ntawm lub rooj tsav xwm Circuit Court yuav tsum muab tso ze rau ntawm qhov sib txuas. Yog vim li cas: txhawm rau tiv thaiv cov kab uas tau lim los ntawm kev sib txuas ntxiv.

Txoj Cai 19: Ntawm PCB, kev lim dej, kev tiv thaiv thiab kev sib cais ntawm cov khoom sib txuas yuav tsum tau muab tso rau ze rau ntawm lub interface.

Yog vim li cas: Nws tuaj yeem ua tiav cov txiaj ntsig ntawm kev tiv thaiv, lim thiab cais tawm.

Lub hauv paus ntsiab lus 20: Yog tias muaj ob lub lim thiab tiv thaiv Circuit Court ntawm lub interface, lub hauv paus ntsiab lus ntawm kev tiv thaiv thawj zaug thiab tom qab ntawd lim yuav tsum tau ua raws.

Yog vim li cas: Kev tiv thaiv Circuit Court yog siv los tiv thaiv sab nraud overvoltage thiab overcurrent. Yog hais tias qhov kev tiv thaiv Circuit Court yog muab tso rau tom qab lub lim Circuit Court, lim Circuit Court yuav puas los ntawm overvoltage thiab overcurrent.