Cov ntsiab lus ntawm PCB tsim cov ntsiab lus: ntau yam uas yuav tsum tau them sai sai rau

Printed Circuit Board (PCB) tsim yog ib qho tseem ceeb txuas hauv kev tsim khoom siv hluav taws xob. Kev tsim PCB zoo tuaj yeem tsis tsuas yog txhim kho qhov kev ua tau zoo thiab kev ntseeg siab ntawm Circuit Court, tab sis kuj txo cov nqi tsim khoom thiab kev saib xyuas nyuaj. Cov hauv qab no yog ob peb lub ntsiab lus thiab cov teeb meem uas yuav tsum tau them sai sai rau hauv PCB tsim.

1. Tsim cov duab kos duab kos duab

Ua ntej pib nrog PCB layout, koj thawj zaug yuav tsum ua kom tiav qhov tsim ntawm lub voj voog schematic daim duab. Cov kauj ruam no tsis yog tsuas yog lub hauv paus ntawm PCB tsim, tab sis kuj yog qhov yuav tsum tau ua ua ntej kom ntseeg tau tias kev ua haujlwm hauv Circuit Court thiab kev ua haujlwm. Thaum tsim lub voj voog schematic, koj yuav tsum tau them sai sai rau cov ntsiab lus hauv qab no:

Qhia meej txog cov haujlwm thiab cov kev xav tau: Kom nkag siab meej txog kev ua haujlwm thiab kev ua haujlwm ntawm lub voj voog thiab xyuas kom meej tias tus qauv tsim tuaj yeem ua tau raws li cov kev cai no.

Xaiv cov khoom tsim nyog: Xaiv cov khoom tsim nyog raws li kev ua haujlwm hauv Circuit Court, suav nrog cov khoom lag luam xws li kev ua tau zoo, ntim khoom, thiab nqi.

Kos lub logos thiab cov tsis muaj: xyuas kom meej tias cov khoom siv lub logo thiab cov tsis muaj nyob rau ntawm daim duab schematic yog qhov tseeb thiab raug los pab txhawb PCB layout thiab debugging.

2. Tsim nyog layout

Cov txheej txheem tsim nyog yog ib feem tseem ceeb ntawm kev ua haujlwm ntawm PCB. Cov txheej txheem yuav tsum tau ua tib zoo xav txog ntau yam xws li kev ua haujlwm hauv Circuit Court, teeb pom kev ncaj ncees, thermal tswj, thiab lwm yam. Nov yog qee qhov kev txiav txim siab layout:

Functional partitioning: Faib lub Circuit Court rau hauv kev ua haujlwm modules thiab tso cov khoom ntawm tib lub functional modules ua ke kom txo tau cov teeb liab kis tau tus mob.

Teeb liab kev ncaj ncees: Cov kab hluav taws xob ceev ceev yuav tsum luv luv thiab ncaj nraim li sai tau kom tsis txhob muaj kev cuam tshuam hla. Cov kab teeb liab tseem ceeb xws li kab moos, kab rov pib dua, thiab lwm yam yuav tsum tau ceev kom deb ntawm lub suab nrov.

Kev tswj cov cua kub: Cov khoom siv hluav taws xob siab yuav tsum tau muab sib npaug, thiab cov teeb meem kub kub yuav tsum tau txiav txim siab yog tias tsim nyog, cov hluav taws xob hluav taws xob lossis qhov hluav taws xob yuav tsum tau ntxiv.

3. Routing txoj cai

Routing yog lwm qhov txuas tseem ceeb hauv PCB tsim tsim nyog routing tuaj yeem zam teeb liab cuam tshuam thiab kev sib kis qeeb. Nov yog qee cov ntsiab lus uas yuav tsum nco ntsoov thaum routing:

Kab dav thiab qhov sib txawv: Xaiv cov kab dav dav raws li qhov loj me tam sim no kom paub meej tias kab tuaj yeem tiv taus qhov sib txuam tam sim no. Khaws qhov sib nrug txaus ntawm cov kab teeb liab sib txawv kom tsis txhob muaj teeb meem cuam tshuam.

Tus naj npawb ntawm cov kab hluav taws xob: Cov kab hluav taws xob tsis yooj yim feem ntau xav tau ntau txheej ntawm cov xov hlau tsim nyog npaj cov xaim ntawm txhua txheej los xyuas kom meej qhov zoo ntawm cov kab teeb liab thiab cov kab hluav taws xob.

Tsis txhob tig ntsej muag: Tsis txhob tig ntsej muag thaum taug kev, thiab sim siv 45-degree oblique tig los txo cov teeb liab cuam tshuam thiab cuam tshuam.

4. Fais fab mov thiab av tsim

Kev siv hluav taws xob thiab kev tsim hauv av yog qhov tseem ceeb tshaj plaws ntawm PCB tsim, uas cuam tshuam ncaj qha rau kev ruaj ntseg thiab kev cuam tshuam kev cuam tshuam ntawm Circuit Court. Cov hauv qab no yog cov kev xav rau lub zog thiab kev tsim hauv av:

Lub hwj chim txheej thiab txheej hauv av: Siv cov txheej txheem hluav taws xob ywj pheej thiab txheej hauv av kom txo tau qhov impedance ntawm lub zog hluav taws xob thiab hauv av thiab txhim kho lub zog zoo.

Decoupling capacitor: Npaj decoupling capacitor nyob ze ntawm lub hwj chim tus pin kom lim tawm cov suab nrov nrov thiab ua kom lub zog ruaj khov.

Lub voj hauv av: zam lub voj hauv av tsim thiab txo qhov cuam tshuam ntawm electromagnetic. Cov kab hauv av rau cov kab teeb liab tseem ceeb yuav tsum yog luv thiab ncaj li sai tau.

5. EMI / EMC tsim

Electromagnetic cuam tshuam (EMI) thiab electromagnetic compatibility (EMC) tsim yog qhov tseem ceeb los xyuas kom meej tias PCBs ua hauj lwm zoo nyob rau hauv complex electromagnetic ib puag ncig. Cov hauv qab no yog EMI / EMC tsim kev txiav txim siab:

Shielding tsim: Shield rhiab cov teeb liab thiab cov suab nrov nrov kom txo tau electromagnetic cuam tshuam.

Filter tsim: Ntxiv cov ntxaij lim dej rau cov khoom siv hluav taws xob thiab cov kab teeb liab los lim tawm cov suab nrov thiab txhim kho electromagnetic compatibility.

Grounding tsim: Ib qho kev tsim hauv av zoo tuaj yeem cuam tshuam electromagnetic cuam tshuam thiab txhim kho lub peev xwm tiv thaiv kev cuam tshuam ntawm Circuit Court.

6. Kev tsim khoom thiab kev sib dhos ceev faj

PCB tsim yuav tsum tsis tsuas yog xav txog kev ua haujlwm hauv Circuit Court, tab sis kuj muaj peev xwm ntawm kev tsim khoom thiab kev sib dhos. Nov yog qee cov ntsiab lus uas yuav tsum nco ntsoov thaum tsim khoom thiab sib dhos:

Kev ntim khoom ntim thiab qhov sib txawv: Xaiv cov txheej txheem ntim khoom kom ntseeg tau tias muaj qhov sib dhos txaus kom yooj yim rau vuam thiab kho.

Kuaj taw tes tsim: Teem cov ntsiab lus xeem ntawm cov nodes tseem ceeb los pab txhawb kev ntsuas hluav taws xob txuas ntxiv thiab daws teeb meem.

Cov txheej txheem ntau lawm: Nkag siab thiab ua raws cov txheej txheem tshwj xeeb ntawm PCB cov tuam txhab los xyuas kom meej tias tus qauv tsim ua raws li kev tsim khoom.

nyob rau hauv xaus

PCB tsim yog cov txheej txheem nyuaj thiab tsim nyog, suav nrog ntau yam xws li kev tsim hluav taws xob hluav taws xob, cov txheej txheem kev teeb tsa, kev coj ua, kev siv hluav taws xob thiab kev tsim hauv av, EMI / EMC tsim, tsim khoom thiab sib dhos. Txhua yam yuav tsum tau ua tib zoo saib xyuas los ntawm tus tsim qauv txhawm rau tsim lub rooj tsav xwm Circuit Court nrog kev ua tau zoo, ruaj khov thiab kev ntseeg tau. Los ntawm cov ntsiab lus ntawm tsab xov xwm no, Kuv vam tias yuav muab qee qhov kev siv thiab kev taw qhia rau cov neeg tsim khoom PCB los txhim kho qhov zoo thiab ua haujlwm ntawm PCB tsim.

• 2024-06-21 09:33:36
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