Feem ntau, muaj ob txoj cai tseem ceeb rau laminated tsim:
1. Txhua routing txheej yuav tsum muaj ib tug nyob ib sab siv txheej (lub hwj chim mov los yog tsim);
2.Cov txheej txheem tseem ceeb uas nyob ib sab thiab hauv av yuav tsum tau khaws cia ntawm qhov tsawg kawg nkaus kom muab qhov sib txuas loj loj;
Hauv qab no yog ib qho piv txwv ntawm ob-txheej rau yim-txheej pawg:
A. ib sab PCB board thiab ob sab PCB board laminated
Rau ob txheej, vim tias cov txheej txheem me me, tsis muaj teeb meem lamination.EMI hluav taws xob tswj feem ntau yog txiav txim siab los ntawm kev xaim thiab kev teeb tsa;
Cov electromagnetic compatibility ntawm ib leeg-txheej thiab ob-txheej daim hlau yog ua ntau thiab ntau dua.Lub ntsiab yog vim li cas rau qhov tshwm sim no yog hais tias thaj tsam ntawm lub teeb liab voj yog loj heev, uas tsis tsuas yog tsim muaj zog electromagnetic tawg, tab sis kuj ua rau lub Circuit Court rhiab heev rau sab nraud cuam tshuam.Txoj kev yooj yim tshaj plaws los txhim kho cov electromagnetic compatibility ntawm ib txoj kab yog txo cov voj voog ntawm lub teeb liab tseem ceeb.
Cov teeb liab tseem ceeb: Los ntawm qhov kev xav ntawm electromagnetic compatibility, lub teeb liab tseem ceeb feem ntau yog hais txog cov teeb liab uas tsim hluav taws xob muaj zog thiab muaj kev nkag siab rau lub ntiaj teb sab nraud.Cov teeb liab uas tuaj yeem tsim hluav taws xob muaj zog feem ntau yog cov cim raws sij hawm, xws li cov cim qis ntawm cov moos lossis chaw nyob.Interference rhiab signals yog cov uas tsis tshua muaj theem ntawm analog signals.
Ib qho thiab ob txheej phaj feem ntau yog siv rau hauv cov qauv simulation tsawg zaus hauv qab 10KHz:
1) Route lub hwj chim cables ntawm tib txheej nyob rau hauv ib tug radial yam, thiab txo cov sum ntawm qhov ntev ntawm cov kab;
2) Thaum taug kev cov khoom siv hluav taws xob thiab av xaim, ze rau ib leeg;Tso ib lub hauv av xaim ze ntawm lub teeb liab tseem ceeb xaim kom ze li sai tau.Yog li, ib lub voj me me yog tsim thiab qhov rhiab heev ntawm kev sib txawv hom hluav taws xob rau sab nraud cuam tshuam raug txo.Thaum ib qho av xaim ntxiv ntawm ib sab ntawm lub teeb liab xaim, ib lub voj voog uas muaj qhov tsawg tshaj plaws yog tsim, thiab cov teeb liab tam sim no yuav tsum tau dhau los ntawm lub voj voog no ntau dua li lwm txoj hauv av.
3) Yog hais tias nws yog ob-txheej Circuit Court board, nws tuaj yeem nyob rau sab nraud ntawm lub rooj tsav xwm hauv Circuit Court, ze rau ntawm cov teeb liab kab hauv qab no, raws li cov teeb liab kab ntaub hauv av xaim, kab kom dav li ntau tau.Qhov tshwm sim hauv cheeb tsam Circuit Court yog sib npaug ntawm lub thickness ntawm lub rooj tsav xwm Circuit Court multiplied los ntawm qhov ntev ntawm cov teeb liab kab.
B.Lamination ntawm plaub txheej
1. Sig-gnd (PWR)-PWR (GND)-SIG;
2. GND-SIG(PWR)-SIG(PWR)-GND;
Rau ob qho tib si ntawm cov qauv laminated no, qhov teeb meem muaj peev xwm yog nrog cov tsoos 1.6mm (62mil) phaj tuab.Txheej txheej yuav ua kom loj, tsis tsuas yog ua rau kev tswj hwm impedance, interlayer coupling thiab shielding;Tshwj xeeb, qhov sib txawv loj ntawm cov khoom siv hluav taws xob strata txo cov phaj capacitance thiab tsis tsim nyog rau kev lim suab nrov.
Rau thawj lub tswv yim, nws yog feem ntau yog siv nyob rau hauv cov ntaub ntawv ntawm ib tug loj tus naj npawb ntawm chips ntawm lub rooj tsavxwm.Cov tswv yim no tuaj yeem tau txais SI kev ua tau zoo dua, tab sis EMI kev ua haujlwm tsis zoo, uas yog tswj hwm los ntawm kev xaim thiab lwm yam ntsiab lus.Lub ntsiab mloog: Qhov tsim tau muab tso rau hauv cov teeb liab txheej ntawm cov teeb liab txheej tshaj plaws, kom muaj txiaj ntsig rau kev nqus thiab kev nqus hluav taws xob;Ua kom thaj tsam phaj kom muaj kev cuam tshuam txog 20H txoj cai.
Rau lub tswv yim thib ob, nws feem ntau yog siv qhov chaw nti ntawm lub rooj tsavxwm tsawg txaus thiab muaj thaj chaw txaus nyob ib ncig ntawm lub nti los tso lub zog tooj liab txheej.Nyob rau hauv cov tswv yim no, txheej txheej ntawm PCB yog tag nrho cov stratum, thiab nruab nrab ob txheej yog teeb liab / fais fab txheej.Lub zog hluav taws xob ntawm cov teeb liab txheej tau dhau los nrog txoj kab dav, uas tuaj yeem ua rau txoj kev impedance ntawm lub zog hluav taws xob tam sim no qis, thiab impedance ntawm lub teeb liab microstrip txoj kev kuj tseem qis, thiab tuaj yeem tiv thaiv cov teeb liab sab hauv hluav taws xob los ntawm sab nrauv. txheej.Los ntawm EMI tswj kev pom, qhov no yog qhov zoo tshaj plaws 4-txheej PCB qauv muaj.
Lub ntsiab lus tseem ceeb: nruab nrab ob txheej ntawm lub teeb liab, lub zog sib xyaw txheej yuav tsum tau qhib, cov kev taw qhia ntawm txoj kab yog ntsug, tsis txhob crosstalk;Tsim nyog tswj vaj huam sib luag cheeb tsam, xav txog 20H cov cai;Yog hais tias lub impedance ntawm cov xov hlau yuav tsum tau tswj, ua tib zoo nteg cov xov hlau nyob rau hauv lub tooj liab Islands tuaj ntawm lub hwj chim mov thiab av.Tsis tas li ntawd, cov khoom siv hluav taws xob lossis kev tso tooj liab yuav tsum sib txuas kom ntau li ntau tau los xyuas kom meej DC thiab tsis tshua muaj kev sib txuas.
C.Lamination ntawm 6 txheej ntawm daim hlau
Rau kev tsim ntawm cov siab chens ntom thiab lub moos siab zaus, tus tsim qauv ntawm 6-txheej board yuav tsum tau txiav txim siab.Txoj kev lamination yog pom zoo:
1.SIG-GND-SIG-PWR-GND-SIG;
Rau cov tswv yim no, cov txheej txheem lamination ua tiav cov teeb liab kev ncaj ncees, nrog cov teeb liab txheej nyob ib sab ntawm cov txheej hauv av, lub zog txheej ua ke nrog cov txheej hauv av, qhov impedance ntawm txhua txheej txheej txheej tuaj yeem tswj tau zoo, thiab ob txheej txheej tuaj yeem nqus cov kab sib nqus zoo. .Tsis tas li ntawd, nws tuaj yeem muab txoj hauv kev rov qab zoo dua rau txhua lub teeb liab txheej nyob rau hauv cov xwm txheej ntawm kev ua tiav lub zog thiab kev tsim.
2. GND-SIG-GND-PWR-SIG-GND;
Rau cov tswv yim no, cov tswv yim no tsuas yog siv rau cov ntaub ntawv uas cov cuab yeej ceev tsis siab heev.Cov txheej no muaj tag nrho cov txiaj ntsig ntawm txheej txheej sab saud, thiab lub dav hlau hauv av ntawm txheej sab saum toj thiab hauv qab yog qhov ua tiav, uas tuaj yeem siv los ua cov txheej txheem tiv thaiv zoo dua.Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias lub hwj chim txheej yuav tsum nyob ze ntawm txheej uas tsis yog lub dav hlau tseem ceeb, vim tias lub dav hlau hauv qab yuav ua tiav ntau dua.Yog li ntawd, EMI kev ua tau zoo yog qhov zoo dua li thawj lub tswv yim.
Cov ntsiab lus: Rau lub tswv yim ntawm 6-txheej board, qhov sib nrug ntawm lub hwj chim txheej thiab hauv av yuav tsum tau txo kom tau txais lub zog zoo thiab hauv av coupling.Txawm li cas los xij, txawm hais tias lub phaj thickness ntawm 62mil thiab qhov sib nrug ntawm cov khaubncaws sab nraud povtseg raug txo, nws tseem nyuaj rau kev tswj qhov sib nrug ntawm lub zog loj thiab cov txheej hauv av me me heev.Piv nrog rau thawj lub tswv yim thiab lub tswv yim thib ob, tus nqi ntawm cov phiaj xwm thib ob tau nce ntau heev.Yog li ntawd, peb feem ntau xaiv thawj qhov kev xaiv thaum peb pawg.Thaum lub sij hawm tsim, ua raws li 20H cov cai thiab daim iav txheej txoj cai.
D.Lamination ntawm yim txheej
1, Vim qhov tsis zoo electromagnetic absorption muaj peev xwm thiab lub zog loj impedance, qhov no tsis yog txoj hauv kev zoo ntawm lamination.Nws cov qauv yog raws li nram no:
1.Signal 1 tivthaiv nto, microstrip thaiv txheej
2.Signal 2 sab hauv microstrip routing txheej, zoo routing txheej (X kev taw qhia)
3. Hauv av
4.Signal 3 Strip kab routing txheej, zoo routing txheej (Y kev taw qhia)
5.Signal 4 Cable routing txheej
6. Lub zog
7.Signal 5 internal microstrip thaiv txheej txheej
8.Signal 6 Microstrip thaiv txheej txheej
2. Nws yog ib tug variant ntawm peb stacking hom.Vim qhov sib ntxiv ntawm cov txheej txheem siv, nws muaj EMI kev ua tau zoo, thiab cov yam ntxwv impedance ntawm txhua txheej teeb liab tuaj yeem tswj tau zoo.
1.Signal 1 tivthaiv nto, microstrip thaiv txheej, zoo txheej txheej
2.Ground stratum, zoo electromagnetic yoj nqus muaj peev xwm
3.Signal 2 Cable routing txheej.Zoo cable routing txheej
4.Power txheej, thiab cov nram qab no strata tsim zoo heev electromagnetic absorption 5.Ground stratum
6.Signal 3 Cable routing txheej.Zoo cable routing txheej
7. Lub zog tsim, nrog lub zog loj impedance
8.Signal 4 Microstrip cable txheej.Txheej zoo cable
3, Qhov zoo tshaj plaws stacking hom, vim hais tias siv ntau txheej hauv av siv dav hlau muaj peev xwm nqus geomagnetic zoo heev.
1.Signal 1 tivthaiv nto, microstrip thaiv txheej, zoo txheej txheej
2.Ground stratum, zoo electromagnetic yoj nqus muaj peev xwm
3.Signal 2 Cable routing txheej.Zoo cable routing txheej
4.Power txheej, thiab cov nram qab no strata tsim zoo heev electromagnetic absorption 5.Ground stratum
6.Signal 3 Cable routing txheej.Zoo cable routing txheej
7.Ground stratum, zoo dua electromagnetic yoj nqus muaj peev xwm
8.Signal 4 Microstrip cable txheej.Txheej zoo cable
Qhov kev xaiv ntawm ntau npaum li cas cov khaubncaws sab nraud povtseg siv thiab yuav siv li cas cov khaubncaws sab nraud povtseg nyob ntawm tus naj npawb ntawm cov teeb liab tes hauj lwm ntawm lub rooj tsavxwm, ntaus ntawv ceev, PIN ceev, teeb liab zaus, board loj thiab ntau lwm yam.Peb yuav tsum coj cov xwm txheej no los txiav txim siab.Qhov ntau ntawm cov teeb liab sib txuas, qhov siab dua ntawm cov cuab yeej, qhov siab dua tus lej PIN, qhov ntau zaus ntawm cov teeb liab tsim yuav tsum tau saws kom deb li deb tau.Rau kev ua tau zoo EMI nws yog qhov zoo tshaj los xyuas kom meej tias txhua lub teeb liab txheej muaj nws tus kheej siv txheej.
Post lub sij hawm: Jun-26-2023