A cikin zane na Kwamitin PCB, tare da saurin karuwar mita, za a sami tsangwama da yawa wanda ya bambanta da ƙirar ƙananan allon PCB. Akwai galibi fannoni na tsangwama, gami da hayaniyar samar da wutar lantarki, tsoma bakin layin watsawa, hadawa da kutse na lantarki (EMI).

Yadda za a warware tsangwama na ƙirar PCB mai yawa

I. Akwai hanyoyi da yawa don kawar da amo wutar lantarki a cikin ƙirar PCB

1. Kula da ramin rami a kan jirgi: ta ramin yana sanya Layer na samar da wutar lantarki ya buƙaci buɗe bakin don barin sarari don ramin ta. Idan buɗe Layer na samar da wutar lantarki ya yi yawa, an daure ya shafi madaurin siginar, ana tilasta siginar ta wuce, yankin madauki yana ƙaruwa, kuma amo yana ƙaruwa. A lokaci guda, idan layukan sigina da yawa sun taru kusa da buɗewa kuma suna raba madauki iri ɗaya, toshewar na yau da kullun zai haifar da crosstalk. Duba Hoto na 2.

Yadda za a warware tsangwama na ƙirar PCB mai yawa?

2. Layin haɗin yana buƙatar isasshen ƙasa: kowace siginar tana buƙatar samun madaidaicin siginar mallaka, kuma yankin madauki na siginar da madauki yana da ƙanƙanta, wato, siginar da madauki ya zama daidai.

3. Analog da samar da wutar lantarki don rarrabewa: na’urori masu yawan mita gabaɗaya suna da hankali sosai ga amo na dijital, don haka yakamata a raba su biyu, a haɗa su gaba ɗaya a ƙofar wutan lantarki, idan siginar ta ƙetare analog da sassan dijital na kalmomi, zaku iya sanya madauki a fadin siginar don rage yankin madauki. Lokacin dijital-analog da aka yi amfani da shi don madauki siginar.

Yadda za a warware tsangwama na ƙirar PCB mai yawa

4. Kaucewa jibgewar wutar lantarki daban tsakanin yadudduka daban -daban: in ba haka ba, amo na kewaye yana iya wucewa cikin sauƙi ta hanyar haɗin gwiwar parasitic.

5. warewar abubuwa masu mahimmanci: kamar PLL.

6. Sanya layin wutar: Don rage madaurin siginar, sanya layin wutar a gefen layin siginar don rage amo.

Yadda za a warware tsangwama na ƙirar PCB mai yawa?

Ii. Hanyoyin kawar da tsangwama na layin watsawa a ƙirar PCB sune kamar haka:

(a) Guji hana katsewa na layin watsawa. Ma’anar dakatarwar da ba ta ƙare ba ita ce ma’anar maye gurbin layin watsawa, kamar kusurwa madaidaiciya, ta rami, da sauransu, ya kamata a guji shi gwargwadon iko. Hanyoyi: Don gujewa madaidaiciyar kusurwoyin layi, gwargwadon yiwuwar zuwa 45 ° Angle ko arc, babban Angle na iya kasancewa; Yi amfani da ‘yan kaɗan ta ramuka kamar yadda zai yiwu, saboda kowane ta cikin rami shine katsewa. Sigina daga na waje yana gujewa wucewa ta cikin ciki kuma akasin haka.

Yadda za a warware tsangwama na ƙirar PCB mai yawan mita？

(b) Kada ku yi amfani da layin gungumen azaba. Domin duk wani layin tari yana haifar da hayaniya. Idan layin tari ya takaice, ana iya haɗa shi a ƙarshen layin watsawa; Idan layin tari ya yi tsawo, zai ɗauki babban layin watsawa a matsayin tushen kuma ya samar da babban tunani, wanda zai wahalar da matsalar. Ana ba da shawarar kada a yi amfani da shi.

3. Akwai hanyoyi da yawa don kawar da ɓarna a cikin ƙirar PCB

1. Girman iri biyu na crosstalk yana ƙaruwa tare da ƙaruwa na rashin ƙarfi, don haka layin siginar da ke kula da tsangwama da crosstalk ya haifar ya kamata a ƙare da kyau.

2, gwargwadon iko don ƙara tazara tsakanin layin sigina, na iya rage ƙarfin ƙarfin ƙarfin ƙarfin ƙarfin ƙarfin aiki. Gudanar da ƙasa, tazara tsakanin wayoyi (kamar layin siginar aiki da layin ƙasa don keɓewa, musamman a cikin yanayin tsalle tsakanin layin siginar da ƙasa zuwa tazara) da rage shigar gubar.

3. Hakanan ana iya rage ƙarfin kyankyasai ta hanyar saka waya ta ƙasa tsakanin layin siginar kusa, wanda dole ne a haɗa shi da samuwar kowane kwatankwacin kwata.

4. Don tsinkaye mai ma’ana, yakamata a rage yankin madauki kuma, idan an yarda, a kawar da madauki.

5. Guji madaurin raba sigina.

6, kula da amincin sigina: yakamata mai zanen ya gane ƙarshen haɗin gwiwa a cikin tsarin walda don warware amincin siginar. Masu zanen kaya da ke amfani da wannan hanyar za su iya mai da hankali kan tsayin microstrip na farantin ƙarfe na garkuwa don samun kyakkyawan aiki na mutuncin sigina. Don tsarin tare da masu haɗin mai yawa a cikin tsarin sadarwa, mai zanen na iya amfani da PCB azaman tashar.

4. Akwai hanyoyi da yawa don kawar da tsangwama na electromagnetic a ƙirar PCB

1. Rage madaukai: Kowane madauki daidai yake da eriya, don haka muna buƙatar rage yawan madaukai, yankin madaukai da tasirin eriya na madaukai. Tabbatar cewa siginar tana da madauki madaidaiciya guda ɗaya a kowane maki biyu, ku guji madaukai na wucin gadi kuma kuyi amfani da layin wutar a duk lokacin da zai yiwu.

2, tacewa: a cikin layin wutar lantarki kuma a cikin siginar siginar na iya ɗaukar tacewa don rage EMI, akwai hanyoyi uku: decoupling capacitor, EMI filter, magnetic components. Ana nuna tace EMI a ciki.

Yadda za a warware tsangwama na ƙirar PCB mai yawan mita？

3, garkuwa. Sakamakon tsawon batun tare da tattaunawa mai yawa na kare labaran, babu takamaiman gabatarwa.

4, yi ƙoƙarin rage saurin na’urorin mitar.

5, ƙara madaidaicin madaidaiciyar allon PCB, na iya hana sassan mitar mitar kamar layin watsawa kusa da jirgin daga haskakawa waje; Haɓaka kaurin allon PCB, rage girman kaurin layin microstrip, na iya hana ɓarkewar layin electromagnetic, kuma yana iya hana radiation.