PCB mai sauri a warware. Ga dokoki tara:

Dokar 1: Dokar kariya ta siginar siginar sauri

A cikin ƙirar PCB mai saurin gudu, maɓallan manyan siginar sauri kamar agogo suna buƙatar kariya. Idan ba a basu garkuwar ba ko kuma wani bangare na garkuwar su, za a haifar da zubar EMI. Ana ba da shawarar cewa a haƙa kebul ɗin da aka ba da kariya don yin ƙasa kowane mil mil 1000.

Doka ta 2: ƙa’idodin ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan ƙaƙƙarfan siginar sauri

Dokokin rufe hanya madaidaiciya don siginar sauri

Menene ƙa’idodin EMI don ƙirar PCB mai sauri

Dokokin rufe hanya madaidaiciya don siginar sauri

Saboda karuwar allon PCB, injiniyoyin PCB LAYOUT da yawa suna iya yin kuskure yayin aiwatar da wayoyi. A takaice dai, hanyar siginar siginar sauri kamar siginar agogo tana haifar da sakamakon rufewa yayin da wayoyin PCB da yawa. Irin wannan sakamakon rufe-madauki zai haifar da eriyar zobe da haɓaka ƙarfin hasken EMI.

Dokar 3: ƙa’idodin buɗe hanya don siginar sauri

Dokokin buɗe hanya don siginar sauri

Menene ƙa’idodin EMI don ƙirar PCB mai sauri

Dokokin buɗe hanya don siginar sauri

Dokar 2 ta ambaci cewa rufewar siginar siginar sauri zai haifar da hasken EMI, yayin da bude-madauki kuma zai haifar da hasken EMI.

A cikin siginar siginar sauri, kamar siginar agogo, da zarar an samar da sakamakon madauki madaidaiciya a cikin jigilar PCB mai yawa, za a samar da eriya mai layi-layi kuma za a ƙara ƙarfin hasken EMI.

Dokar 4: ƙa’idar ci gaba da haɓakar halayyar don siginar sauri

Dokar ci gaba da hani akan halaye don siginar sauri

Menene ƙa’idodin EMI don ƙirar PCB mai sauri

Dokar ci gaba da hani akan halaye don siginar sauri

Don siginar saurin-sauri, dole ne a tabbatar da ci gaba da haɗarin halayyar yayin canzawa tsakanin yadudduka; in ba haka ba, za a ƙara hasken EMI. Wato, faɗin wiring na wannan Layer dole ne ya kasance mai ci gaba, kuma ƙarancin wiring na yadudduka daban -daban dole ne ya ci gaba.

Dokar 5: ƙa’idodin jagora don ƙirar PCB mai sauri

Dokar ci gaba da hani akan halaye don siginar sauri

Menene ƙa’idodin EMI don ƙirar PCB mai sauri

Dole ne a juya igiyoyi tsakanin yadudduka biyu da ke kusa. In ba haka ba, crosstalk na iya faruwa kuma hasashen EMI na iya ƙaruwa. A takaice, yadudduka wayoyin da ke kusa suna bin madaidaiciyar hanya, madaidaiciya da madaidaiciyar madaidaiciyar hanya, kuma madaidaiciyar wayoyi na iya murkushe crosstalk tsakanin layin.

Dokar 6: Dokokin ilimin topology a cikin ƙirar PCB mai saurin gudu

Menene ƙa’idodin EMI don ƙirar PCB mai sauri

Dokar ci gaba da hani akan halaye don siginar sauri

A cikin ƙirar PCB mai saurin gudu, kulawar rashin daidaiton halayyar keɓaɓɓiyar hukumar da ƙirar tsarin topological a ƙarƙashin nauyi da yawa yana ƙayyade nasara ko gazawar samfurin.

An nuna topology sarkar Daisy a cikin adadi, wanda gabaɗaya yana da fa’ida ga fewan Mhz. Ana ba da shawarar yin amfani da tsarin alamar tauraro a ƙarshen baya a cikin ƙirar PCB mai sauri.

Dokar 7: Dokar Resonance na tsawon layin

Dokar sakewa na tsawon layi

Menene ƙa’idodin EMI don ƙirar PCB mai sauri

Dokar sakewa na tsawon layi

Bincika ko tsayin layin siginar da mitar siginar ta zama resonance, wato lokacin da tsawon wayoyin shine lokutan lamba na raƙuman siginar 1/4, wannan siginar za ta haifar da ƙara, kuma resonance zai haskaka raƙuman lantarki, samar da tsangwama.

Dokar 8: Dokar hanyar komawa baya

Dokar hanyar komawa baya

Menene ƙa’idodin EMI don ƙirar PCB mai sauri

Dokar hanyar komawa baya

Duk sigina masu saurin gudu dole ne su sami kyakkyawar hanyar komawa. Rage hanyar komawa baya na siginar sauri kamar agogo. In ba haka ba radiation za ta ƙaru ƙwarai, kuma adadin radiation yana daidai da yankin da ke kewaye da hanyar sigina da hanyar komawa baya.

Doka ta 9: Ka’idojin ƙa’idar ƙa’idodin ƙa’idodi

Ka’idoji don sanya kayan haɗin kayan aiki

Menene ƙa’idodin EMI don ƙirar PCB mai sauri

Ka’idoji don sanya kayan haɗin kayan aiki

Wurin da aka cire capacitor ɗin yana da mahimmanci. Matsayin da bai dace ba ba zai iya cimma tasirin datsewa ba. Ka’idar ita ce: kusa da fil ɗin samar da wutar lantarki, da kuma wayoyin wutar lantarki na capacitor da ƙasa kewaye da ƙaramin yanki.