Nrog rau txoj kev loj hlob ntawm kev siv tshuab hluav taws xob, muaj kev xav tau ntawm kev kub ceev PCB tsim los ua haujlwm. Vim tias lawv tuaj yeem ua haujlwm nrog kev sib xyaw ua ke ntawm kev kub ceev rau feem ntau cov khoom siv hluav taws xob, txawm tias yooj yim heev. Thaum koj tsim lub siab ceev PCB, nws yuav tsum tau coj qee yam thiab tsis ua raws li kev xav. Dab tsi ntxiv, koj yuav pom tias cov txheej txheem tsim PCB thiab cov txheej txheem uas koj tau ua tiav yog qhov koj yuav tsum tau kawm. Needless hais, nws yuav muaj kev pab zoo rau PCB designers nyob rau hauv kev kub ceev PCB tsim.

Yog li Dab Tsi Yog Kev Kub Ceev PCB Tsim?

Txhawm rau muab nws yooj yim, kev kub ceev PCB tsim yog ib qho qauv tsim uas qhov kev ncaj ncees ntawm koj cov teeb liab pib cuam tshuam los ntawm lub cev yam ntxwv ntawm koj lub rooj tsav xwm Circuit Court, xws li koj qhov layout, ntim, txheej stackup, interconnections, thiab lwm yam ... Yog hais tias koj pib tsim boards thiab khiav mus rau hauv cov teeb meem xws li qeeb, attenuation, crosstalk, xav txog, lossis emissions, ces zoo siab! Koj tau pom koj tus kheej hauv ntiaj teb ntawm kev kub ceev PCB tsim.

Dab tsi ua rau kev kub ceev tsim kom muaj qhov tshwj xeeb yog qhov kev mloog zoo rau cov teeb meem no. Tej zaum koj yuav raug siv los tsim ib lub rooj tsavxwm yooj yim uas feem ntau ntawm koj lub sijhawm tsom mus rau qhov kev tso kawm thiab routing. Tab sis nrog kev tsim kev kub ceev, nws tseem ceeb dua los txiav txim siab qhov chaw koj tab tom tso koj cov kab, qhov dav lawv yuav ua li cas, lawv nyob ze li cas rau lwm cov teeb liab, thiab cov khoom zoo li cas lawv txuas nrog. Thiab thaum koj yuav tsum txiav txim siab txog qhov kev xaiv no, tom qab ntawd koj tus txheej txheem tsim PCB yuav coj mus rau theem tshiab tag nrho.

Tam sim no cia peb rov qab rau ib pliag. Peb paub tias qhov qhia tau zoo ntawm kev tsim kev kub ceev yog thaum koj tab tom cuam tshuam nrog cov teeb meem kev ncaj ncees, tab sis qhov ntawd txhais li cas? Peb yuav tsum to taub cov teeb liab nyob rau hauv ib tug nutshell.

Kev kub ceev PCB tsim kev txawj ntse

1. Paub qhov tsim software uas tuaj yeem muab cov kev xaiv siab heev

Nws xav tau ntau yam haujlwm nyuaj rau kev tsim kev kub ceev hauv koj CAD software. Dab tsi ntxiv, tej zaum yuav tsis muaj ntau cov kev pab cuam rau cov neeg nyiam nyiam, thiab feem ntau nws tsis muaj kev xaiv siab heev raws li Web suites. Yog li koj yuav tsum muaj kev nkag siab zoo ntawm lub zog, CAD cuab yeej.

2. Kev kub ceev routing

Thaum nws los txog rau cov kab nrawm nrawm, tus tsim qauv yuav tsum paub txog cov cai rau kev taug kev tseem ceeb, suav nrog tsis txhob txiav cov dav hlau hauv av thiab ua kom txoj kev luv luv. Yog li tiv thaiv cov kab hauv ib qho kev ncua deb ntawm crosstalk, thiab tiv thaiv kev cuam tshuam los tsim cov ntsiab lus kom ua rau lub teeb liab kev ncaj ncees.

3. Routing kab nrog impedance tswj

Nws xav tau impedance sib piv rau qee hom teeb liab uas yog li 40-120 ohms. Thiab cov yam ntxwv impedance matched cov lus qhia yog antennae thiab ntau yam sib txawv.

Nws yog ib qho tseem ceeb rau tus tsim kom paub yuav ua li cas xam cov kab dav thiab txheej txheej rau qhov tsim nyog impedance qhov tseem ceeb. Yog tias tsis yog qhov tseeb impedance qhov tseem ceeb, nws yuav ua rau muaj kev cuam tshuam loj rau cov teeb liab, uas yuav ua rau cov ntaub ntawv tsis raug cai.

4. Ntev sib txuam cov kab

Muaj ntau cov kab hauv cov tsheb npav ceev ceev thiab cov tsheb npav interface. Cov kab tuaj yeem ua haujlwm ntawm ntau zaus, yog li nws yog ib qho tseem ceeb uas cov teeb liab yuav tsum yog los ntawm lub davhlau ya nyob twg xa mus rau qhov chaw txais tau txais tib lub sijhawm. Dab tsi ntxiv, nws yuav tsum muaj qhov tshwj xeeb hu ua length matching. Yog li feem ntau cov qauv qhia txog qhov siab ntev uas xav tau kom phim qhov ntev.

Yuav ua li cas paub yog tias koj xav tau kev tsim kev kub ceev?

1. Nws muaj kev kub ceev interface hauv koj lub rooj tsavxwm?

Ib txoj hauv kev ceev kom paub seb koj yuav tsum ua raws li cov txheej txheem tsim kev kub ceev yog los xyuas seb koj puas muaj kev sib txuas ceev, piv txwv li DDR, PCI-e, lossis txawm tias video interfaces xws li DVI, HDMI thiab lwm yam.

Muaj qee cov kev cai tsim kev kub ceev uas koj yuav tsum tau ua raws li tag nrho cov interfaces no. Dab tsi ntxiv, muab cov lus qhia tseeb ntawm txhua cov ntaub ntawv hauv cov ntaub ntawv.

2. Qhov piv ntawm koj cov kab ntev mus rau lub wavelength ntawm cov teeb liab

Feem ntau, koj lub PCB yuav xav tau kev tsim kev kub ceev yog tias lub wavelength ntawm koj cov lus yog tib yam li cov kab ntev. Vim tias qee cov qauv xws li DDR xav tau cov kab uas muaj qhov ntev sib npaug rau qhov kev zam tsawg.

Ib daim duab ntxhib zoo yog tias yog koj qhov ntev thiab qhov ntev ntawm qhov ntev tuaj yeem tswj tau hauv ib qho kev txiav txim ntawm ib leeg. Tom qab ntawd koj yuav zoo dua xyuas cov qauv kev kub ceev.

3. PCB nrog wireless interfaces

Raws li koj paub, txhua tus PCB muaj lub kav hlau txais xov, nws yuav tsum tsim kom muaj kev kub ceev tsis muaj teeb meem dab tsi los ntawm qhov txuas lossis ntawm lub rooj tsavxwm. Dab tsi ntxiv, onboard antennas kuj yuav tsum tau kaw impedance kom phim qhov ntev ntev.

Nws yuav tsum tau txuas mus rau cov connectors uas muaj ib tug tshwj xeeb impedance nqi rau Circuit Court boards nrog SMA connectors los yog zoo sib xws.

Xav tau PCB Ntau zaus thiab tau txais cov ntaub ntawv PCB pom zoo, Xa ntawv rau kell@ymspcb.com.