Ntau hom ntawm ib lub rooj tsavxwm muaj cov tswv yim sib txawv. Kab lus no feem ntau qhia txog ob hom PCB cov tswv yim kev sib txuas.

Ntaus ib lub tswv yim PCB layout

1) Cov yam ntxwv tseem ceeb ntawm Hom 1 yog raws li hauv qab no: cov kev cai ntev ntev, nruj crosstalk cov cai, cov cai topology, cov cai sib txawv, cov cai hauv av, thiab lwm yam.

2) Kev ua haujlwm ntawm cov tes hauj lwm tseem ceeb: tsheb npav

Txhais chav kawm;

Nws yuav tsum tau ua kom tau raws li cov qauv topological, stub thiab nws qhov ntev (lub sijhawm sau) txwv;

Ob hom PCB routing tswv yim

Daim duab ntawm kev sib npaug daisy saw thiab nruab nrab tsav daisy saw

Teeb tus pins virtual los tswj lub topology;

Ob hom PCB routing tswv yim

Virtual T point diagram

Limit STUB. Teem lub siab tshaj plaws stub ntev, ncua / ntev yuav tsum tau muab ntau yam; nws yog txwv tsis pub tawm ntawm sab ntev ntawm lub ncoo; nws raug tso cai kom muaj kev sib tshuam ntawm lub davhlau ya nyob twg.

3) Kev ua haujlwm ntawm lub network tseem ceeb: kab moos

Txhais chav kawm, teeb tsa kab sib nrug txaus lossis qhov sib nrug ntawm Chav Kawm thiab Chav Kawm;

Teem lub moos kab hauv ib txheej thiab thaj chaw tshwj xeeb.

4) Kev ua haujlwm ntawm lub network tseem ceeb: kab sib txawv

Feem ntau yuav tsum tau qhia cov txheej txheem txuas;

Siv hom sib npaug, zam hom tandem;

Txhais qhov ntev ntawm qhov sib txawv ntawm ob kab sib txawv thiab qhov ntev ntawm qhov sib txawv ntawm qhov sib txawv;

Txoj hauv kev niaj zaus los teeb tsa qhov sib txawv ntawm cov kab sib txawv yog los txhais cov khub sib txawv raws li chav kawm, thiab tom qab ntawd txhais qhov sib nrug ntawm Chav Kawm mus rau chav kawm.

5) Crosstalk tswj

Yuav tsum muaj kev tshem tawm txaus ntawm pawg network; Piv txwv li, yuav tsum muaj qhov sib txawv ntawm cov ntaub ntawv kab, kab chaw nyob thiab cov kab tswj, teeb tsa cov tes hauj lwm no mus rau cov chav kawm sib txuas, thiab tom qab ntawd nruab nrab ntawm cov ntaub ntawv kab thiab kab chaw nyob, cov ntaub ntawv kab thiab cov kab tswj tau teeb tsa crosstalk tswj cov cai ntawm kab, ntawm kab chaw nyob thiab kab tswj.

6) Cov ntaub thaiv npog

Kev tiv thaiv kev tiv thaiv: sib npaug (parallel), coaxial (coaxial), cascade (tandem);

Tom qab cov kev cai raug teeb tsa, koj tuaj yeem siv phau ntawv lossis tsis siv neeg txuas.

Ob hom PCB routing tswv yim

Hom 2 PCB layout tswv yim

1) Hom 2 PCB tsim muaj ob qho tib si kev paub txog lub cev thiab cov kev cai hluav taws xob ua kom muaj kev sib tw.

2) “Cov Lus Qhia” yuav tsum tau ua thaum lub sij hawm xaim, xws li: Fanout, txheej faib, tsis siv neeg thaiv txheej txheem tswj, txwv cheeb tsam txhais, thaiv kab sib txuas, thiab lwm yam, yuav tsum tau cuam tshuam zoo.

3) Ntsuas thiab txheeb xyuas qhov ua tau ntawm kev xaim;

4) Xav txog kev ua tiav ntawm cov kev cai ntawm lub cev ua ntej, thiab tom qab ntawd kev ua tiav ntawm cov kev cai hluav taws xob;

5) Rau kev tsis sib haum xeeb lossis kev ua yuam kev, nws yuav tsum tau ua tib zoo txheeb xyuas qhov ua rau thiab kho cov txheej txheem xaim hauv lub hom phiaj.

Rau PCB engineers, PCB thaiv cov tswv yim yog qhov kev paub tseem ceeb, thiab txhua tus neeg yuav tsum paub txog nws.