Maitiro ekudzikisa crosstalk muPCB dhizaini?
Crosstalk ndeyekusaronga electromagnetic coupling pakati pemateki pa yakadhindwa redunhu bhodhi. Kubatana uku kunogona kuita kuti masignal pulses eimwe trace apfuure chiratidzo chechiratidzo cheimwe trace, kunyangwe kana asiri mukubata kwenyama. Izvi zvinoitika kana nhanhava pakati pemaronda anotevedzana yakamanikana. Kunyangwe zviteshi zvichigona kuchengetwa padiki padiki nekuda kwezvinangwa zvekugadzira, zvinogona kunge zvisina kukwana kune electromagnetic zvinangwa.

Chimbofunga mitsetse miviri inofambirana. Kana iyo yekusiyanisa chiratidzo mune imwe trace ine yakakura amplitude kupfuura imwe trace, inogona kukanganisa imwe nzira. Zvadaro, chiratidzo chiri mu “akabatwa” trajectory chichatanga kutevedzera maitiro emurwi, pane kuitisa chiratidzo chayo. Kana izvi zvikaitika, crosstalk ichaitika.

Crosstalk inowanzoonekwa kuti inoitika pakati pemakwara maviri anoenderana padivi peimwe pane imwechete layer. Nekudaro, crosstalk inowanzoitika pakati pematanho maviri anoenderana ari padhuze pane akatarisana. Izvi zvinodaidzwa kunzi Broadside coupling uye zvinonyanya kuitika nekuti maviri ari padhuze masignal layers akapatsanurwa nehushoma hushoma hwekukora kwepakati. Ukobvu hunogona kuita 4 mils (0.1 mm), dzimwe nguva shoma pane kupatsanura pakati pematanho maviri pachikamu chimwe chete.

Iyo trace spacing yekubvisa crosstalk inowanzova yakakura pane yakajairika trace spacing zvinodiwa

Bvisa mukana we crosstalk mukugadzira
Sezvineiwo, hausi patsitsi dzekutaura kwakasiyana. Nekugadzira bhodhi redunhu kuti rideredze crosstalk, unogona kudzivirira matambudziko aya. Aya anotevera mamwe maitiro ekugadzira anogona kukubatsira kubvisa mukana wekuyambuka pabhodhi redunhu:

Chengetedza chinhambwe chakareba sezvinobvira pakati pezviviri zvekusiyanisa uye mamwe masaini ekufambisa. Mutemo wechigunwe igap = 3 times the track wide.

Chengetedza musiyano mukuru unobvira pakati pekufambisa wachi uye kumwe kufambiswa kwemasaini. Mugero mumwechete = katatu mutemo wechigunwe chekutsvaga hupamhi unoshandawo pano.

Chengeta chinhambwe chakawanda sezvinobvira pakati pezviviri zvakasiyana. Mutemo wegunwe pano wakati kurei zvishoma, gap = 5 times the wide of the trace.

Zviratidzo zveAsynchronous (zvakadai seRESET, INTERRUPT, nezvimwewo) zvinofanira kunge zviri kure nebhazi uye zvine zviratidzo zvepamusoro-soro. Inogona kufambiswa padivi peiyo yekubatidza kana kudzima kana kusimudza masaini, nekuti aya masaini haawanzo shandiswa panguva yakajairika yekushanda kwedunhu bhodhi.

Kuve nechokwadi chekuti maviri ari padhuze masignal layer anochinjana mune redunhu bhodhi stack anochinjana yakachinjika uye yakatwasuka nzira yenzira. Izvi zvinoderedza mukana wekubatana kwakafara, sezvo zvisaririra zvisingabvumirwe kuwedzera parallel pamusoro peumwe neumwe.

Nzira iri nani yekudzikisa inogona kuyambuka pakati pematanho maviri epadyo echiratidzo ndeyekuparadzanisa zvidimbu kubva pasi plane layer pakati pavo mune microstrip kumisikidza. Iyo ndege yepasi haingo wedzera chinhambwe pakati pezvikamu zviviri zvechiratidzo, ichapawo nzira yekudzoka inodiwa yechiratidzo chechiratidzo.

Yako PCB yekugadzira maturusi uye yechitatu-bato maapplication anogona kukubatsira kubvisa crosstalk

Maitiro ako ekugadzira software anogona kukubatsira iwe kubvisa crosstalk mune yakakwirira-kumhanya PCB dhizaini
Iyo PCB yekugadzira chishandiso ine akawanda akavakirwa-mukati maficha anogona kukubatsira iwe kudzivirira crosstalk mudhizaini yako. Nekutsanangudza mafambiro uye kugadzira microstrip stacks, iyo bhodhi layer mitemo ichakubatsira iwe kudzivirira Broadside coupling. Uchishandisa mitemo yemhando yenetiweki, iwe unozogona kugovera hombe dzenguva dzekutevera kumapoka ematiweki anotapukirwa necrosstalk. Differential pair routers nzira yekusiyanisa pairi semapeya chaiwo pane kuafambisa ega. Izvi zvinochengetedza nzvimbo inodiwa pakati peiyo mutsauko peya traces uye mamwe manetwork kudzivirira crosstalk.

Kuwedzera kune akavakirwa-mukati mabasa ePCB dhizaini software, kune mamwe maturusi anogona kukubatsira kubvisa crosstalk mune yakakwirira-kumhanya PCB dhizaini. Kune akasiyana crosstalk Calculator kuti akubatsire kuona chaiyo trace hupamhi uye nzvimbo yenzira. Iko kune zvakare chiratidzo chekutendeseka simulator yekuongorora kana dhizaini yako iine zvingangoita crosstalk nyaya.

Kana zvichibvumidzwa kuti zviitike, crosstalk inogona kunge iri dambudziko hombe pamabhodhi edunhu akadhindwa. Iye zvino zvawave kuziva zvekutarisa, iwe unenge wakagadzirira kudzivirira crosstalk kuti irege kuitika. Maitiro ekugadzira atinokurukura pano uye maficha ePCB dhizaini software achakubatsira iwe kugadzira crosstalk-yemahara dhizaini.