Thaum dhau PCB schematic rau layout rau rau yam no yuav tsum tau mastered

Thaum dhau ntawm PCB schematic rau cov qauv tsim, muaj ntau yam xav txog. Yuav kom suav tau, nws yog qhov tseem ceeb hauv qab no rau rau yam. Thov tshawb xyuas thiab sau qhov khoob ntawm koj tus kheej ~

Cov ntaub ntawv ntaus ntawv, netlist, layout cov ntaub ntawv, thiab thawj kab dav dav teeb tsa kuj tau dhau los hauv cov txheej txheem ntawm kev dhau lub schematic mus rau qhov chaw layout los ntawm cov ntaub ntawv netlist

1.

Nov yog qee cov kauj ruam uas pom zoo los npaj rau theem tsim layout:

1) Teem raster thiab units rau qhov tsim nyog. Txhawm rau kom ua tiav cov txheej txheem zoo dua tswj hwm cov khoom siv thiab cov cim, cov cuab yeej kab sib chaws, daim phiaj tooj liab, ntawm kab sib chaws thiab SMD daim phiaj tuaj yeem tsim los ua 1mil.

2) Teem lub cheeb tsam dawb paug thiab vias ntawm lub rooj tsav xwm Circuit Court thav duab rau qhov yuav tsum tau muaj nuj nqis. PCB manufacturers tej zaum yuav muaj qhov tsawg kawg nkaus los yog nominal cov lus pom zoo rau qhov muag tsis pom thiab faus ntawm qhov chaw.

3) Teem lub ncoo sib thooj / dhau ntawm qhov ntsuas raws li lub peev xwm ntawm PCB chaw tsim khoom. Feem ntau cov tuam txhab PCB tuaj yeem txhawb nqa me me vias nrog lub laum txoj kab uas hla ntawm 10mil thiab lub ncoo txoj kab uas hla ntawm 20mil.

4) Teem cov kev cai tsim raws li xav tau.

5) Teem cov yuam sij luv luv rau cov txheej txheem siv los hloov cov khaubncaws sab nraud povtseg sai sai (thiab tsim vias) thaum routing.

2.

Tuav yuam kev thaum lub sij hawm hloov schematic

Ib qho yuam kev thaum lub sij hawm hloov schematic yog ib qho uas tsis muaj lossis tsis raug rau pob khoom.

Nws yuav tsum tau muab sau tseg tias yog hais tias muaj ib tug ntaus ntawv nyob rau hauv lub schematic uas tsis tau ntim, cov lus ceeb toom yuav pop tuaj qhia tias lub virtual tivthaiv tsis tuaj yeem raug xa tawm. Hauv qhov no, tsis muaj cov ntaub ntawv hneev taw ua ntej yuav dhau mus rau qhov layout thiab cov khoom yuav tsuas raug tshem tawm ntawm qhov layout.

Cov lus ceeb toom qhia txog qhov tsis sib haum xeeb kuj tau tsim thaum lub sijhawm xa khoom yog tias lub pob dhau lawm tab sis tsis raug raws li lub pob siv tau.

Kho cov hneev taw kom raug hauv qhov schematic, lossis tsim cov hneev taw uas siv tau rau txhua yam khoom siv. Tom qab kho, ua cov kauj ruam pem hauv ntej kom hloov kho thiab synchronize cov ntaub ntawv tsim.

3.

Hloov kho qhov tsim nrog callouts

Cov lus piav qhia yog tus txheej txheem ntawm kev hloov cov qauv tsim los ntawm schematic rau layout lossis los ntawm layout mus rau schematic. Rov qab annotation (layout rau schematic) thiab rau pem hauv ntej annotation (schematic rau layout) yog tus yuam sij kom khaws cov qauv tsim kom raug

Txhawm rau tiv thaiv cov haujlwm uas tau ua tiav, cov ntaub ntawv thaub qab thiab khaws cia ntawm cov ntaub ntawv tam sim no ntawm schematic thiab layout cov ntaub ntawv yuav tsum tau ua ua ntej cov kauj ruam tseem ceeb rau pem hauv ntej lossis thim rov qab.

Tsis txhob sim hloov ob qho tib si schematic thiab layout tib lub sijhawm. Ua cov kev hloov pauv rau ib feem ntawm tus qauv tsim (xws li schematic lossis layout), tom qab ntawd ua qhov tseeb annotation cov kauj ruam los synchronize cov ntaub ntawv tsim.

4.

Renumber lub cuab yeej

Component renumbering yog ib txoj haujlwm ntawm renumbering Cheebtsam ntawm PCB hauv ib qho kev txiav txim.

Cov lej siv yuav tsum tau xaj los ntawm sab saum toj mus rau hauv qab thiab sab laug mus rau sab xis ntawm PCB.

Qhov no ua rau nws yooj yim dua los nrhiav cov khoom ntawm lub rooj tsavxwm thaum sib dhos, sim, thiab daws teeb meem.

5.

Tuav cov cuab yeej siv sijhawm kawg lossis hloov pauv netlist

Lub xeem-feeb PCB ntaus ntawv lossis netlist hloov pauv tsis xav tau, tab sis qee zaum tsim nyog vim muaj teeb meem ntawm cov khoom siv lossis kev tshawb pom ntawm qhov kawg-feeb tsim yuam kev. Yog hais tias nws yog ib feem los yog netlist uas yuav tsum tau hloov, nws yuav tsum tau ua nyob rau hauv lub schematic thiab ces xa mus rau lub layout cuab tam los ntawm pem hauv ntej annotation.

Nov yog qee cov lus qhia:

Yog tias ntxiv cov cuab yeej tshiab (xws li rub-up resistor ntawm qhov qhib-drain output) tom qab qhov kev teeb tsa tau pib, ntxiv cov resistors thiab nets rau tus qauv tsim los ntawm schematic. Tom qab ntawv sau npe rau pem hauv ntej, tus resistor yuav tshwm sim sab nraum lub rooj tsav xwm ncej raws li ib qho kev tivthaiv tsis muaj kev tivthaiv, nrog kev ya mus qhia txog kev sib txuas rau lub vas. Tom ntej no txav cov khoom nyob rau hauv lub board ncej thiab ua ib txwm routing.

Rov qab callouts ua haujlwm zoo nrog cov lej siv hloov pauv, xws li rov qab layout renumbering.

6.

Xaiv cov cuab yeej muab tso rau los ntawm qhov tseem ceeb

Thaum lub sijhawm txheej txheem PCB, ib txoj hauv kev los xauj cov khoom tshwj xeeb lossis cov kab hauv cov schematic yog siv 'qhov tseem ceeb xaiv' feature. Qhov no feature tso cai rau koj xaiv ib tug tivthaiv los yog ib tug kab (los yog ntau yam khoom) thiab saib seb lawv nyob qhov twg nyob rau hauv lub schematic.

Qhov no tshwj xeeb tshaj yog muaj txiaj ntsig zoo thaum sib piv bypass capacitors rau lawv cov IC sib txuas. Hloov pauv, koj tuaj yeem nrhiav cov khoom tshwj xeeb lossis cov kab hauv cov txheej txheem thaum saib cov schematic.