Yuav ua li cas txo crosstalk hauv PCB tsim?
Crosstalk yog qhov tsis xav tau electromagnetic coupling ntawm kab nyob rau luam tawm hauv Circuit Court board. Qhov kev sib txuas no tuaj yeem ua rau cov teeb liab pulses ntawm ib kab mus dhau lub teeb liab kev ncaj ncees ntawm lwm txoj kab, txawm tias lawv tsis nyob hauv lub cev. Qhov no tshwm sim thaum qhov sib nrug ntawm cov kab sib luag yog nruj. Txawm hais tias cov kab yuav raug khaws cia ntawm qhov tsawg kawg nkaus rau kev tsim khoom, lawv yuav tsis txaus rau cov hom phiaj electromagnetic.

Xav txog ob txoj kab uas nyob ib sab mus rau ib qho. Yog tias qhov sib txawv ntawm qhov sib txawv hauv ib txoj kab muaj qhov ntau dua li qhov sib txawv, nws tuaj yeem cuam tshuam rau lwm txoj kab. Tom qab ntawd, lub teeb liab nyob rau hauv “tus neeg raug tsim txom” trajectory yuav pib ua raws li cov yam ntxwv ntawm tus neeg aggressor’s trajectory, es tsis txhob ua nws tus kheej teeb liab. Thaum qhov no tshwm sim, crosstalk yuav tshwm sim.

Crosstalk feem ntau suav hais tias tshwm sim ntawm ob qho tib si lem nyob ib sab ntawm ib leeg ntawm tib txheej. Txawm li cas los xij, crosstalk feem ntau yuav tshwm sim ntawm ob qho tib si kab nyob ib sab ntawm ib leeg ntawm cov txheej uas nyob ib sab. Qhov no yog hu ua broadside coupling thiab feem ntau yuav tshwm sim vim hais tias ob lub teeb liab nyob ib sab yog sib cais los ntawm ib qho me me ntawm cov tub ntxhais thickness. Lub thickness tuaj yeem yog 4 mils (0.1 hli), qee zaum tsawg dua qhov sib nrug ntawm ob kab ntawm tib txheej.

Txoj kab sib nrug los tshem tawm crosstalk feem ntau yog ntau dua li cov qauv sib txawv raws li qhov yuav tsum tau ua

Tshem tawm qhov ua tau ntawm crosstalk hauv kev tsim
Hmoov zoo, koj tsis nyob ntawm txoj kev hlub tshua ntawm kev sib tham. Los ntawm kev tsim lub rooj tsav xwm hauv Circuit Court kom txo qis crosstalk, koj tuaj yeem zam cov teeb meem no. Cov hauv qab no yog qee qhov kev tsim qauv uas tuaj yeem pab koj tshem tawm qhov muaj peev xwm ntawm crosstalk ntawm lub rooj tsav xwm Circuit Court:

Khaws kom deb li deb tau ntawm cov khub sib txawv thiab lwm yam teeb liab routing. Txoj cai ntawm tus ntiv tes xoo yog qhov sib txawv = 3 npaug ntawm kab dav.

Khaws qhov sib txawv loj tshaj plaws ntawm lub moos routing thiab lwm yam teeb liab routing. Tib qhov sib txawv = 3 zaug txoj cai ntawm tus ntiv tes xoo rau kab dav kuj siv tau ntawm no.

Khaws kom deb npaum li qhov ua tau ntawm cov khub sib txawv. Txoj cai ntawm tus ntiv tes xoo ntawm no yog me ntsis loj, qhov sib txawv = 5 npaug ntawm qhov dav ntawm kab.

Asynchronous signals (xws li RESET, INTERRUPT, thiab lwm yam) yuav tsum nyob deb ntawm lub tsheb npav thiab muaj cov teeb liab ceev. Lawv tuaj yeem raug xa mus rau ib sab ntawm qhov qhib lossis kaw lossis lub zog hluav taws xob, vim tias cov teeb liab no tsis tshua siv thaum lub sijhawm ua haujlwm ntawm lub rooj tsavxwm.

Ua kom ntseeg tau tias ob lub teeb liab sib txuas sib txuas ua ke nrog ib leeg hauv pawg pawg tswj hwm Circuit Court yuav hloov cov kab rov tav thiab ntsug routing. Qhov no yuav txo tau qhov kev sib txuas dav dav, vim tias cov kab sib txuas tsis raug tso cai kom txuas mus rau qhov sib npaug ntawm sab saum toj.

Ib txoj hauv kev zoo dua los txo qhov muaj peev xwm crosstalk ntawm ob txheej teeb liab uas nyob ib sab yog cais cov khaubncaws sab nraud povtseg ntawm cov dav hlau hauv av nruab nrab ntawm lawv hauv microstrip configuration. Lub dav hlau hauv av yuav tsis tsuas yog nce qhov kev ncua deb ntawm ob lub teeb liab txheej, nws tseem yuav muab txoj hauv kev uas yuav tsum tau rov qab rau lub teeb liab txheej.

Koj tus PCB tsim cov cuab yeej thiab daim ntawv thov thib peb tuaj yeem pab koj tshem tawm cov lus sib tham

Yuav ua li cas koj tsim software yuav pab tau koj tshem tawm crosstalk nyob rau hauv high-ceev PCB tsim
Cov cuab yeej tsim PCB muaj ntau yam ua haujlwm uas tuaj yeem pab koj kom tsis txhob muaj kev sib tham hauv koj tus qauv tsim. Los ntawm kev qhia cov lus qhia thiab tsim microstrip stacks, cov txheej txheem txheej txheem yuav pab koj kom tsis txhob muaj kev sib txuas dav dav. Siv cov kev cai network-hom, koj yuav muaj peev xwm muab cov sijhawm taug qab loj dua rau cov pab pawg ntawm cov tes hauj lwm uas muaj kev cuam tshuam ntau dua rau kev sib tham. Cov khub sib txawv routers xa cov khub sib txawv raws li cov khub tiag tiag tsis yog routing lawv tus kheej. Qhov no yuav tswj xyuas qhov sib txawv ntawm qhov sib txawv ntawm cov kab sib txawv thiab lwm cov tes hauj lwm kom tsis txhob sib tham.

Ntxiv nrog rau kev ua haujlwm ntawm PCB tsim software, muaj lwm yam cuab yeej uas tuaj yeem pab koj tshem tawm cov lus sib tham hauv high-speed PCB tsim. Muaj ntau lub tshuab xam zauv crosstalk los pab koj txiav txim siab qhov tseeb kab qhov dav thiab qhov sib nrug rau txoj kev. Kuj tseem muaj lub teeb liab kev ncaj ncees simulator los tshuaj xyuas seb koj tus qauv tsim puas muaj teeb meem crosstalk.

Yog tias tso cai tshwm sim, crosstalk yuav yog qhov teeb meem loj ntawm cov ntawv luam tawm hauv Circuit Court. Tam sim no koj paub tias yuav nrhiav dab tsi, koj yuav npaj txhij los tiv thaiv crosstalk tsis tshwm sim. Cov txheej txheem tsim qauv peb tham ntawm no thiab cov yam ntxwv ntawm PCB tsim software yuav pab koj tsim cov qauv tsim tsis muaj crosstalk.