Nyob rau hauv tus txheej txheem ntawm PCB design, because the plane segmentation, may lead to a reference plane of discontinuous signal, for low frequency signal, may have nothing to do, in the high frequency digital systems, high frequency signal to the reference plane for return path, namely the flow path, if the reference ᒣ surface discontinuity, signal across the break up, this will bring many problems, Xws li EMI, crosstalk thiab lwm yam teeb meem. Hauv qhov no, kev faib segmentation yuav tsum tau stitched los muab txoj hauv kev luv luv rov qab rau lub teeb liab. Cov txheej txheem ua haujlwm suav nrog ntxiv xaws lub peev xwm thiab choj:

A. Stiching Capacitor˖

Usually, a 0402 or 0603 ceramic capacitor is placed across the signal division, and the capacitance of the capacitor is 0.01uF or 0.1uF. If the space allows, several more like capacitors ˗ can be added. Meanwhile, try to ensure that the signal line is within the sewing capacitance of 200mil. Qhov me me nyob deb li cas, qhov zoo dua the thiab cov tes hauj lwm ntawm ob qho kawg ntawm lub capacitor sib raug rau cov tes hauj lwm ntawm lub dav hlau siv los ntawm qhov uas lub teeb liab hla. Saib cov tes hauj lwm txuas nrog ntawm ob qho kawg ntawm lub capacitor hauv daim duab 1, thiab ob lub network sib txawv tau hais txog hauv ob xim:

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B. Choj hla ˖

Ib qho yog “teeb ​​tsa pob ntawv ua hauv av” hauv cov txheej txheem txheej txheem thoob plaws kev faib, kuj tseem yuav yog pob ntawv ntawm lwm lub network teeb liab kab, qhov “pob ntawv hauv av” raws li tuab li sai tau, txoj hauv kev no, xa mus rau daim duab hauv qab no

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Nov yog cov lus piav qhia ntxiv ntawm ib tiam dhau los ntawm kev hla ntu ˖

1. Cov lus faib hauv qab no ˖ ntawm ib lub rooj tsav xwm, tej zaum yuav muaj cov khoom siv hluav taws xob ntau los ua cov txheej txheem, thiab cov khoom siv hluav taws xob nyob hauv qhov txwv tsawg; Tom qab ua tib zoo xav, peb yuav tsum tau ua haujlwm ntawm lub dav hlau fais fab. Qee zaum nws yuav yog kev so kom huv thiab huv – thiab qee zaum nws tsis tuaj yeem zam kev sib txuas ntev, thiab nws tuaj yeem txi tsuas yog lub teeb liab tsis tseem ceeb, tab sis nws yuav tsum tau kho dua. Qhov kev xav no zoo li taug kev hauv tsev, tam sim ntawd khawb ib lub qhov, qhov no yog teeb meem, nyob ib puag ncig nws, nyob deb me ntsis, tej zaum yuav raug lwm tus neeg ua dev; zoo,

Cias tsim tus choj, lossis koj tuaj yeem mus tsev.

Yog li, ib sab ntawm cov lus piav qhia tsiaj qus, yog tias koj ua ib feem hauv PCB, tom qab ntawd

Txheeb xyuas kab teeb liab, lossis qee yam tuaj yeem tshwm sim.

2. Qhov xwm txheej saum toj no tsis yooj yim rau tsis quav ntsej, thiab muaj lwm qhov xwm txheej uas yuav raug saib tsis taus. Yog tias VIA tuab dhau, ua rau txiav lub dav hlau, tom qab tag nrho, lwm qhov ntawm kuj tseem nyob hauv qhov chaw, ntau yuav muab cov hauv qab no los ua, ua rau ‘txiav tawm, qhov xwm txheej no tsis tau piav qhia ntawm no, qhov cuam tshuam kev taw qhia yog ntau dua. Hauv qhov no, koj yuav tsum teeb tsa txoj cai zoo nyob rau theem pib thiab tshuaj xyuas lawv kom zoo nyob rau theem tom ntej.

Lub moos, rov pib dua, teeb liab tshaj 100M thiab qee lub cim tsheb npav tseem ceeb tsis tuaj yeem sib cais. Muaj tsawg kawg yog ib lub dav hlau tiav, nyiam dua lub dav hlau GND.

Lub moos teeb liab, teeb liab nrawm thiab teeb liab nkag siab txwv tsis pub hla ntu;

Cov cim sib txawv yuav tsum sib npaug rau hauv av kom tsis txhob muaj ib leeg -kab – ncua kev sib cais. (Vertical cross segmentation kom deb li deb tau)

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Txoj kev rov qab los ntau zaus ntawm txhua lub cim qhia nyob ncaj qha hauv qab kab teeb liab ntawm txheej uas nyob ib sab. Kev teeb tsa kev ncaj ncees thiab teeb meem lub sijhawm tuaj yeem txo qis los ntawm kev tso ib txheej txheej hauv qab ntawm lub teeb liab uas muab lub voj ncaj qha rau lub teeb liab. Ib qho 0.01uF Circuit Court capacitor yuav tsum tau siv thaum kev sib cais thiab kev sib tshuam nruab nrab ntawm cov thaiv thiab txheej yog qhov tsis tuaj yeem zam tau. Thaum siv cov khoom siv hluav taws xob, lawv yuav tsum tau muab tso kom ze li sai tau mus rau qhov sib tshuam ntawm kab teeb liab thiab txheej txheej.