Nrog kev nce qib ntawm thev naus laus zis thev naus laus zis, qhov nyuaj ntawm PCB (luam tawm hauv Circuit Court board), qhov kev thov muaj kev txhim kho sai. Designers engaged in HF PCB must have relevant basic theoretical knowledge and rich experience in THE manufacture of HF PCB. Hauv lwm lo lus, ob qho kev kos duab thiab tsim PCB yuav tsum raug txiav txim siab los ntawm qhov chaw ua haujlwm ntau zaus, yog li txhawm rau tsim PCB zoo dua.

Daim ntawv no, PCB xov hlau, vuam phaj thiab siv tus qauv tsim ntawm tooj liab, ua ntej tshaj plaws, ntawm lub hauv paus ntawm PCB thaiv, thaiv, txuas hluav taws xob thiab xav tau kev thaiv kab hauv av hauv daim ntawv qhia txog kev tsim qauv ntawm Cov xov hluav taws xob PCB, qhov thib ob los ntawm cov khoom sib txuas thiab lub qhov taub, PCB ncoo loj thiab cov qauv tsim hauv kev tsim qauv, cov kev xav tau ntawm PCB kev tsim cov txheej txheem los tau qhia txog kev tsim ntawm PCB cov laug, Thaum kawg, los ntawm PCB cov txuj ci txheej tooj liab thiab Cov Chaw tau qhia ua PCB tooj liab txheej txheej tsim, tshwj xeeb ua raws xiaobian kom nkag siab.

Kev piav qhia ntxaws txog kev tsim qauv ntawm PCB thaiv, vuam ncoo thiab txheej tooj liab

PCB thaiv kev tsim

Kev xaim hluav taws xob yog qhov xav tau dav dav ntawm hf PCB tsim raws cov qauv tsim nyog. Kev sib txuas suav nrog kev siv kab hluav taws xob tsis siv neeg thiab kev siv cabling. Feem ntau, tsis muaj teeb meem pes tsawg tus kab teeb liab tseem ceeb muaj, kev siv xov hluav taws xob yuav tsum tau ua rau cov kab teeb liab no ua ntej. Tom qab thaiv cov kab tiav, txoj hlua ntawm cov kab teeb liab no yuav tsum tau ua tib zoo tshuaj xyuas thiab kho tom qab dhau daim tshev, thiab tom qab ntawv lwm cov cable yuav tsum tau txuas ncaj qha. Ntawd yog, kev sib txuas ua ke ntawm phau ntawv thiab kev siv hluav taws xob tsis siv neeg yog siv los ua kom tiav PCB thaiv.

The following aspects should be paid special attention to during the wiring of hf PCB.

1. Cov kev taw qhia ntawm thaiv

Cov xov hluav taws xob ntawm lub Circuit Court yog qhov zoo tshaj los txais yuav ib txoj kab ncaj ncaj raws li qhov taw qhia ntawm lub teeb liab, thiab 45 ° txoj kab tawg lossis txoj kab nkhaus tuaj yeem siv los ua kom tiav qhov hloov pauv, thiaj li txo qis kev tso tawm sab nraud thiab sib koom ua ke ntawm qhov siab -qhov zaus cov cim. Cov xov hluav taws xob txuas hluav taws xob ntau zaus yuav tsum luv li sai tau. Raws li kev ua haujlwm zaus ntawm Circuit Court, qhov ntev ntawm kab teeb liab yuav tsum raug xaiv kom tsim nyog, thiaj li yuav txo qhov kev faib tawm thiab txo qhov poob ntawm lub teeb liab. Thaum ua ob lub vaj huam sib luag, nws yog qhov zoo tshaj rau ob txoj kab uas nyob ib sab ntsug, kab pheeb ces kaum lossis khoov kom sib tshuam ua ke. Zam kev ua ib leeg rau ib leeg, uas txo qis kev cuam tshuam kev cuam tshuam thiab kab mob sib kis.

Cov kab teeb liab loj thiab cov teeb liab qis yuav tsum raug cais kom deb li deb tau, thiab kev tiv thaiv kev tiv thaiv yuav tsum tau ua thaum tsim nyog los tiv thaiv kev cuam tshuam. Rau cov teeb liab nkag tau txais qhov tsis muaj zog, yooj yim cuam tshuam los ntawm cov cim sab nraud, koj tuaj yeem siv cov xov hlau hauv av los tiv thaiv ib puag ncig nws lossis ua txoj haujlwm zoo ntawm kev sib txuas ntau zaus tiv thaiv. Parallel wiring should be avoided on the same level, otherwise distributed parameters will be introduced, which will affect the circuit. Yog tias zam tsis tau, cov ntawv tooj liab hauv av tuaj yeem nkag nruab nrab ntawm ob txoj kab sib dhos los tsim kab sib cais.

In the digital circuit, for differential signal lines, should be in pairs, as far as possible to make them parallel, close to some, and the length is not much different.

2. Daim ntawv ntawm kev thaiv

Hauv PCB thaiv, qhov tsawg kawg nkaus ntawm qhov thaiv tau txiav txim siab los ntawm kev sib zog ua haujlwm ntawm cov hlau thiab cov rwb thaiv tsev thiab lub zog tam sim no ntws los ntawm xaim. Thaum cov tuab ntawm cov ntawv ci tooj liab yog 0.05mm thiab qhov dav yog 1mm-1.5mm, 2A tam sim no tuaj yeem hla tau. Qhov kub yuav tsum tsis siab tshaj 3 ℃. Tsuas yog qee qhov tshwj xeeb thaiv, qhov dav ntawm lwm cov thaiv ntawm tib txheej yuav tsum zoo ib yam li ua tau. Hauv kev siv hluav taws xob ntau zaus, qhov sib nrug ntawm cov xov hlau yuav cuam tshuam rau qhov loj ntawm kev faib tawm lub peev xwm thiab qhov inductance, thiab yog li cuam tshuam rau lub teeb liab poob, kev ruaj ntseg ntawm Circuit Court thiab teeb liab cuam tshuam. Hauv kev hloov pauv hluav taws xob nrawm, xaim hlau yuav cuam tshuam lub teeb liab kis lub sijhawm thiab kev ua haujlwm zoo. Yog li, qhov tsawg kawg nkaus qhov sib txawv ntawm cov thaiv yuav tsum ntau dua lossis sib npaug li 0.5 hli. Nws yog qhov zoo tshaj los siv cov kab dav dav rau PCB thaiv thaum twg los tau.

Yuav tsum muaj qhov nrug deb ntawm cov ntawv luam tawm thiab ntug ntawm PCB (tsis pub tsawg dua qhov tuab ntawm phaj), uas tsis tsuas yog yooj yim rau nruab thiab ua haujlwm, tab sis kuj txhim kho kev ua haujlwm rwb thaiv tsev.

Thaum thaiv tsuas tuaj yeem txuas nrog ib puag ncig lub voj voos loj ntawm txoj kab, peb yuav tsum siv kab ya, uas yog, txuas ncaj qha nrog kab luv kom txo qis kev cuam tshuam los ntawm cov xov hluav taws xob ntev.

Cov kab hluav taws xob uas muaj cov khoom sib nqus ua rau muaj kev nkag siab rau ib puag ncig ib puag ncig sib nqus, thaum khoov ntawm cov xov hluav taws xob ntawm cov hluav taws xob ntau zaus tau yooj yim kom tawg hluav taws xob sib nqus. Yog tias cov khoom siv sib nqus tau muab tso rau hauv PCB, nws yuav tsum xyuas kom meej tias muaj qee qhov nrug ntawm cov ces kaum ntawm txoj hlua thiab nws.

Tsis pub hla hla ntawm tib qib kev thaiv. Rau kab uas tuaj yeem hla tau, tuaj yeem siv “laum” nrog “qhov txhab” txoj hauv kev los daws, cia qee qhov kev coj ua uas yog los ntawm lwm qhov kev tawm tsam, lub peev xwm, kev tso tawm thiab lwm yam cuab yeej ua rau qhov chaw sib nrug “xyaum” dhau los, lossis los ntawm qhov kawg qee cov hlau lead uas tuaj yeem hla “qhov txhab” dhau los. Hauv cov xwm txheej tshwj xeeb uas qhov Circuit Court nyuaj heev, txhawm rau ua kom yooj yim rau kev tsim, nws tseem raug tso cai los daws qhov teeb meem crossover nrog xaim txuas.

Thaum qhov kev siv hluav taws xob ntau zaus ua haujlwm ntau zaus, qhov cuam tshuam tsis sib xws thiab cov kav hlau txais xov ntawm cov thaiv yuav tsum raug txiav txim siab.

Vim tias thaum kawg tus neeg siv khoom tau hloov pauv qhov kev pom zoo yav dhau los thiab xav tau lub ntsiab lus sib tham thiab kev tso chaw raws li tau hais tseg los ntawm lawv, lawv yuav tsum hloov pauv cov qauv mus rau daim duab ntawm sab xis. Qhov tseeb, tag nrho PCB tsuas yog 9cm x 6cm. Nws nyuaj rau hloov tag nrho cov txheej txheem ntawm pawg thawj coj raws li qhov xav tau ntawm cov neeg siv khoom, yog li qhov tseem ceeb ntawm pawg thawj coj tsis tau hloov pauv thaum kawg, tab sis cov khoom siv sab hauv tau hloov pauv kom tsim nyog, feem ntau yog txoj haujlwm ntawm ob qhov txuas thiab lub ntsiab lus ntawm tus pin tau hloov kho.

Tab sis qhov txheej txheem tshiab pom tseeb ua rau muaj teeb meem hauv kab, kab thawj kab tau hloov pauv me ntsis, qhov ntev ntawm kab tau nce, tab sis kuj yuav tsum tau siv ntau qhov, qhov nyuaj ntawm kab tau nce ntau.

Kev piav qhia ntxaws txog kev tsim qauv ntawm PCB thaiv, vuam ncoo thiab txheej tooj liab

It is clear from this example that layout differences can have an impact on PCB design.

Kev piav qhia ntxaws txog kev tsim qauv ntawm PCB thaiv, vuam ncoo thiab txheej tooj liab

3. Cov kab hluav taws xob xav tau rau cov hlua hluav taws xob thiab cov xov hluav taws xob hauv av

Ua kom dav dav ntawm lub hwj huam qaum raws li kev ua haujlwm sib txawv. Hf PCB yuav tsum tau txais thaj tsam loj hauv av thiab teeb tsa ntawm ntug ntawm PCB kom deb li deb tau, uas tuaj yeem txo qis kev cuam tshuam ntawm cov teeb liab sab nraud rau hauv Circuit Court; Nyob rau tib lub sijhawm, cov xov hlau hauv av ntawm PCB tuaj yeem tiv tauj tau zoo nrog lub plhaub, yog li qhov av hauv av ntawm PCB yog ze rau lub ntiaj teb qhov hluav taws xob. Hom av yuav tsum raug xaiv raws li qhov xwm txheej tiag. Sib txawv los ntawm qhov kev siv hluav taws xob tsawg zaus, cov xov hluav taws xob hauv av ntawm cov khoom siv hluav taws xob yuav tsum nyob ze lossis ntau qhov chaw hauv av. Cov xov hluav taws xob hauv av yuav tsum luv thiab tuab kom txo qis hauv av tsis kam, thiab qhov tso cai tam sim no yuav tsum yog peb zaug ntawm kev ua haujlwm tam sim no. Tus neeg hais lus xov tooj cua yuav tsum txuas nrog PCB lub zog txuas hluav taws xob tso tawm theem theem hauv av, tsis txhob txiav txim raws li qhov xav tau.

Hauv cov txheej txheem txuas tseem yuav tsum yog nyob rau lub sijhawm ob peb qhov tsim nyog thaiv lub xauv, kom tsis txhob rov txuas xov tooj ntau zaus. Txhawm rau xauv lawv, khiav EditselectNet cov lus txib kom xaiv Xauv hauv cov khoom siv ua ntej.