Yuav Ua Li Cas Ua Tau Zoo Prototype High-Speed ​​​​Datacom PCB

Qhia:

Prototyping ib lub rooj tsav xwm luam tawm (PCB) nrog cov ntaub ntawv ceev ceev kev sib txuas lus tuaj yeem ua haujlwm tsis txaus ntseeg. Txawm li cas los xij, nrog rau txoj hauv kev zoo thiab kev paub, nws kuj tuaj yeem ua tau zoo siab thiab muaj txiaj ntsig zoo.Hauv tsab ntawv tshaj tawm no, peb yuav tshawb xyuas cov txheej txheem ib ntus ntawm prototyping PCB uas tuaj yeem tswj cov ntaub ntawv ceev ceev.

Kawm txog cov kev xav tau:

Thawj kauj ruam hauv prototyping PCB nrog kev sib txuas lus ceev cov ntaub ntawv yog kom nkag siab meej txog cov cai. Xav txog yam xws li qhov xav tau ntawm cov ntaub ntawv hloov pauv, cov txheej txheem thiab cov qauv uas yuav siv tau, thiab lub suab nrov thiab cuam tshuam ntawm Circuit Court yuav tsum tau tiv taus. Qhov kev nkag siab thawj zaug no yuav coj koj mus txog qhov txheej txheem.

Xaiv cov khoom tsim nyog:

Txhawm rau kom muaj kev sib txuas lus cov ntaub ntawv ceev ceev, nws yog ib qho tseem ceeb los xaiv cov khoom raug rau PCB. Saib rau cov khoom siv nrog cov lus teb ntau zaus thiab tsis tshua muaj siab. Nws yog ib qho tseem ceeb uas yuav tau tshuaj xyuas cov ntaub ntawv thiab cov lus qhia tshwj xeeb kom zoo kom lawv ua tau raws li koj qhov yuav tsum tau ua. Tsis tas li ntawd, xav txog kev siv cov khoom siv siab heev xws li kev kub ceev transceivers lossis serializers / deserializers (SerDes) los txhim kho kev ua haujlwm.

Tsim PCB layout:

PCB layout plays lub luag haujlwm tseem ceeb hauv kev ua tiav kev sib txuas lus cov ntaub ntawv ceev. Ua tib zoo mloog rau cov teeb liab kev ncaj ncees, qhov sib txuam ntev thiab kev tswj hwm impedance. Siv cov tswv yim xws li kev taw qhia sib txawv, stripline routing, thiab zam kev khoov ntse kom txo cov teeb liab distortion thiab crosstalk. Tsis tas li ntawd, xav txog kev siv hauv av thiab lub dav hlau fais fab los txhim kho kev ua tau zoo tag nrho thiab txo cov kev cuam tshuam hluav taws xob (EMI).

Simulation thiab Analysis Design:

Ua ntej pib nrog kev tsim qauv, tus qauv tsim yuav tsum tau simulated thiab soj ntsuam. Siv cov cuab yeej software xws li SPICE (Program for Integrated Circuit Emphasis Simulation) lossis electromagnetic simulator los xyuas qhov ua tau zoo ntawm koj tus qauv tsim. Saib rau tej yam teeb meem xws li teeb liab kev xav, kev ua txhaum lub sij hawm, los yog suab nrov heev. Kev hloov kho tsim nyog thaum lub sij hawm tsim qauv yuav txuag lub sij hawm thiab txo qhov kev pheej hmoo ntawm kev ua tsis tiav thaum lub sij hawm prototyping txheej txheem.

Manufacturing PCB prototypes:

Thaum tus qauv tsim tiav thiab txheeb xyuas los ntawm kev simulation, PCB qauv tuaj yeem tsim tau. Tsim cov ntaub ntawv tuaj yeem xa mus rau lub tuam txhab tsim khoom PCB, lossis, yog tias koj muaj peev txheej tsim nyog, koj tuaj yeem xav txog kev tsim cov PCBs hauv tsev. Xyuas kom meej tias cov txheej txheem raug xaiv ua tau raws li qhov yuav tsum tau muaj kev kub ceev, xws li cov txheej txheem kev tswj hwm impedance thiab cov khoom zoo.

Assembling tus qauv:

Thaum koj tau txais cov qauv PCB tiav lawm, koj tuaj yeem sib sau ua ke. Ua tib zoo solder txhua feem rau PCB, them nyiaj tshwj xeeb rau cov teeb liab ceev ceev. Siv cov txheej txheem soldering kom raug thiab xyuas kom koj cov pob qij txha yog huv thiab txhim khu kev qha. Ua raws li kev coj ua zoo tshaj plaws hauv kev lag luam thiab cov qauv yuav pab kom tsis txhob muaj teeb meem xws li cov txuas txuas txuas lossis qhib kev sib txuas.

Test thiab validate prototypes:

Thaum cov qauv PCB tau sib sau ua ke, nws yuav tsum tau ua kom zoo thiab kuaj xyuas. Siv cov cuab yeej ntsuas tsim nyog, xws li oscilloscope lossis network analyzer, los ntsuas cov ntaub ntawv kev sib txuas lus. Ntsuam xyuas ntau yam xwm txheej, suav nrog cov ntaub ntawv sib txawv, qhov sib txawv ntawm cov khoom sib txawv thiab cov suab nrov, kom ntseeg tau tias PCB ua tau raws li qhov yuav tsum tau ua. Sau cov teeb meem lossis cov kev txwv uas pom thaum lub sijhawm kuaj kom muaj kev txhim kho ntxiv yog tias xav tau.

Iterate thiab kho qhov tsim:

Prototyping yog ib qho txheej txheem rov ua dua, thiab cov teeb meem lossis thaj chaw rau kev txhim kho feem ntau yuav ntsib thaum lub sijhawm sim. Txheeb xyuas cov txiaj ntsig kev xeem, txheeb xyuas thaj chaw rau kev txhim kho, thiab siv cov kev hloov pauv tsim raws li. Nco ntsoov xav txog qhov teeb meem kev ncaj ncees, EMI kev tawm tsam, thiab kev tsim muaj peev xwm thaum hloov kho. Iterate tus qauv tsim thiab sim theem raws li xav tau kom txog rau thaum qhov kev xav tau kev sib txuas lus ceev cov ntaub ntawv tau ua tiav.

Hauv kev xaus:

Prototyping PCB nrog kev sib txuas lus cov ntaub ntawv ceev yuav tsum tau ua tib zoo npaj, ua tib zoo saib xyuas kom meej, thiab ua raws li cov kev coj ua zoo tshaj. Los ntawm kev nkag siab txog cov kev xav tau, xaiv cov khoom tsim nyog, tsim cov qauv tsim kom zoo, simulating thiab txheeb xyuas cov qauv tsim, tsim cov PCB, sib sau ua ke kom raug, thiab ua tib zoo soj ntsuam thiab iterating ntawm prototypes, koj tuaj yeem ua tiav cov kev ua haujlwm siab PCBs rau kev ua haujlwm siab. Kev sib txuas lus ceev cov ntaub ntawv. Tsis tu ncua kho cov qauv tsim thiab nyob twj ywm tshiab nrog cov thev naus laus zis tshiab thiab cov qauv kom nyob ua ntej ntawm qhov nkhaus hauv qhov kev hloov pauv mus ib txhis.