M’mapangidwe a PCB bolodi, ndikuchulukirachulukira kwakanthawi, padzakhala zosokoneza zambiri zomwe ndizosiyana ndi kapangidwe ka bolodi ya PCB yotsika kwambiri. Pali zinthu zinayi zomwe zimasokoneza, kuphatikiza phokoso lamagetsi, kulowererapo kwa zingwe, kuphatikiza ndi kusokoneza kwamagetsi (EMI).

Momwe mungathetsere kusokonezedwa kwa kapangidwe ka PCB pafupipafupi

Pali njira zingapo zothetsera phokoso lamagetsi pakupanga kwa PCB

1. Samalani dzenje loboola bolodi: bowo lomwe limadutsa limapangitsa kuti gawo lamagetsi likhale ndi chitseko chotsegula kuti chisiye malo obowolapo. Ngati kutsegula kwa magetsi kumakhala kochuluka kwambiri, kumakhudza chizindikirocho, chizindikirocho chimakakamizidwa kudutsa, malo ozungulirawo amakula, ndipo phokoso limakulirakulira. Nthawi yomweyo, ngati mizere ingapo yazunguliridwa pafupi ndi potsegulira ndikugawana gawo limodzi, kutsekeka wamba kumayambitsa crosstalk. Onani Chithunzi 2.

Momwe mungathetsere kusokonezedwa kwa kapangidwe ka PCB pafupipafupi?

2. Chingwe cholumikizira chimafuna nthaka yokwanira: chizindikiritso chilichonse chimayenera kukhala ndi chizindikiritso chake, ndipo malo ozungulira a chizindikirocho ndi ochepera momwe angathere, kutanthauza kuti chizindikirocho ndi kuzungulira ziyenera kufanana.

3. mphamvu yamagetsi ya analog ndi digito kuti ipatukane: zida zamagetsi zamagetsi nthawi zambiri zimakhala zovuta kwambiri ku phokoso la digito, chifukwa chake awiriwo ayenera kupatulidwa, kulumikizidwa limodzi pakhomo lamagetsi, ngati chizindikirocho chikudutsa mbali za analog ndi digito za mawu, mutha kuyika kuzungulira chizindikiro kuti muchepetse malo ozungulira. The digito-analogi span ntchito kuzungulira chizindikiro.

Momwe mungathetsere kusokonezedwa kwa kapangidwe ka PCB pafupipafupi

4. Pewani kudumphadumpha kwamagetsi osiyana pakati pa zigawo zosiyanasiyana: apo ayi, phokoso ladera limatha kudutsa kulumikizana kwa parasitic capacitive.

5. kudzipatula pazinthu zofunikira: monga PLL.

6. Ikani chingwe cha magetsi: Kuti muchepetse kuzungulira kwa ma siginolo, ikani chingwe chamagetsi m’mphepete mwa mzere kuti muchepetse phokoso.

Momwe mungathetsere kusokonezedwa kwa kapangidwe ka PCB pafupipafupi?

Ii. Njira zothetsera kufalikira kwa mzere wamagetsi mu kapangidwe ka PCB ndi izi:

(a) Pewani kutaya kwampweya wamagetsi mosalekeza. Mfundo yodziletsa ndiyo njira yosinthira mzere, monga ngodya yowongoka, kudzera pabowo, ndi zina zambiri, ziyenera kupewedwa momwe zingathere. Njira: Kupewa ngodya zowongoka za mzere, momwe mungathere kupita 45 ° Angle kapena arc, Angle yayikulu itha kukhalanso; Gwiritsani ntchito ochepa kudzera m’mabowo momwe mungathere, chifukwa chilichonse kudzera mu dzenje ndi kutha kwa impedance. Zizindikiro zochokera kusanjikiza zakunja zimapewa kudutsa pazosanjikiza zamkati komanso mosemphanitsa.

Momwe mungathetsere kusokonezedwa kwa kapangidwe ka PCB pafupipafupi？

(b) Musagwiritse ntchito mizere yolumikiza. Chifukwa mulu uliwonse wa mulu ndi gwero la phokoso. Ngati muluwo ndi waufupi, ukhoza kulumikizidwa kumapeto kwa chingwe chotumizira; Ngati muluwo ndi wautali, zimatengera chingwe chachikulu chotumizira ngati gwero ndikupanga kuwunikira kwakukulu, komwe kudzasokoneze vutoli. Ndibwino kuti musagwiritse ntchito.

3. Pali njira zingapo zothetsera crosstalk pakupanga kwa PCB

1. Kukula kwa mitundu iwiri ya crosstalk kumawonjezeka ndikuwonjezeka kwampweya wamagetsi, chifukwa chake mzere wazizindikiro wosazindikira kusokonezedwa ndi crosstalk uyenera kuthetsedwa moyenera.

2, momwe zingathere kukweza mtunda pakati pa mizere yama siginecha, kumatha kuchepetsa crosstalk yama capacitive. Kuwongolera kwapansi, kutalikirana pakati pa zingwe (monga mizere yolumikizira ndi mizere yapansi yodzipatula, makamaka pakadumpha pakati pa mzere wazizindikiro ndi nthaka mpaka nthawi) ndikuchepetsa kutsogolera.

3. Capacitive crosstalk amathanso kuchepetsedwa poika waya wapansi pakati pa mizere yoyandikana ndi siginecha, yomwe imayenera kulumikizidwa pakupanga kotala lililonse.

4. Pamtanda wanzeru, malo ozungulirako ayenera kuchepetsedwa ndipo, ngati aloledwa, kuzungulira kuthetsedwe.

5. Pewani kugawana chizindikiro.

6, mverani kuwona umphumphu: wopanga azindikira kulumikizana komaliza pakuwotcherera kuti athetse umphumphu. Opanga omwe amagwiritsa ntchito njirayi atha kuyang’ana kutalika kwa zingwe zazing’ono zazitsulo zotetezera mkuwa kuti athe kuchita bwino posonyeza kukhulupirika. Makina omwe ali ndi zolumikizana zolimba munjira yolumikizirana, wopanga amatha kugwiritsa ntchito PCB ngati malo ogwiritsira ntchito.

4. Pali njira zingapo zothetsera kusokonekera kwamagetsi mu kapangidwe ka PCB

1. Chepetsani malupu: Chingwe chilichonse chimafanana ndi tinyanga, chifukwa chake tifunika kuchepetsa kuchuluka kwa malupu, dera lamalupu ndi kulumikizana kwa tinyanga. Onetsetsani kuti chizindikirocho chili ndi njira imodzi yokhotakhota pamalo aliwonse awiri, pewani malupu opangira ndikugwiritsa ntchito mphamvu yamagetsi pakafunika kutero.

2, kusefa: mu mzere wamagetsi komanso mu mzere wazizindikiro mutha kutenga zosefera kuti muchepetse EMI, pali njira zitatu: decoupling capacitor, fyuluta ya EMI, maginito. Fyuluta ya EMI ikuwonetsedwa.

Momwe mungathetsere kusokonezedwa kwa kapangidwe ka PCB pafupipafupi？

3, kutchinjiriza. Chifukwa cha kutalika kwa nkhaniyo kuphatikiza zokambirana zambiri zoteteza, sizowonjezeranso mawu oyamba.

4, yesetsani kuchepetsa liwiro lazida zapamwamba kwambiri.

5, yonjezerani ma dielectric osasunthika a board ya PCB, imatha kuteteza magawo othamanga kwambiri monga chingwe chotengera pafupi ndi bolodi kuti chisatuluke kunja; Lonjezerani makulidwe a bolodi la PCB, muchepetse makulidwe amtundu wa microstrip, zitha kuteteza ma elekitiromagnetic spillover, komanso kupewa ma radiation.