Dokokin da ya kamata a bi PCB zane

1) Dokokin kewaye na ƙasa:

Ƙaƙƙarfan ƙa’idar madauki yana nufin cewa yankin madauki wanda layin siginar ya kafa kuma madaidaicinsa ya zama ƙarami sosai. Ƙaramin yanki na madauki shine, ƙarancin radiyo na waje shine kuma an sami ƙarancin tsangwama na waje. Dangane da wannan doka, yakamata a yi la’akari da rarraba jirgin ƙasa da mahimmin siginar siginar yayin rarrabuwar jirgin ƙasa don gujewa matsalolin da tsutsar jirgin ƙasa ke haifarwa. A cikin ƙirar farantin ninki biyu, a cikin yanayin barin isasshen sarari don samar da wutar lantarki, yakamata ya zama ɓangaren cike da tunani zuwa hagu, kuma ƙara wasu ramukan da suka zama dole, haɗa siginar gefe biyu da kyau, zuwa wasu mahimman siginar da ke ɗaukar ƙasa gwargwadon iko, zuwa ƙirar wasu madaidaicin mita, la’akari na musamman yakamata ya kasance ga matsalar jirgin sama na kewaya siginar, farantin sanwic ɗin da aka ba da shawarar yana da kyau.

2) Sarrafa iko

CrossTalk yana nufin tsangwama tsakanin juna tsakanin cibiyoyin sadarwa daban -daban akan PCB saboda dogayen wayoyi masu layi daya, galibi saboda rarrabuwa da rarrabuwa tsakanin layin layi daya. Babban matakan da za a shawo kan ɓarna shine:

Ƙara tazarar kebul na layi daya kuma bi dokar 3W.

Saka masu warewar ƙasa tsakanin layikan layi daya.

Rage tazara tsakanin layin wayoyi da jirgin ƙasa.

3) Kariyar garkuwa

Kada a bari wani ƙarshen ya yi iyo.

Babbar manufar ita ce a guji “tasirin eriya” da rage tsoma bakin da ba dole ba tare da radiation da liyafar, wanda in ba haka ba zai iya kawo sakamako mara tabbas.

6) Impedance daidai da dokokin dubawa:

A cikin kewayon dijital mai sauri, fiye da lokacin jinkirin lokacin siginar siginar waya ta PCB ta tashi lokacin (ko ƙasa) kwata, wayoyi kamar layin watsawa ne, don tabbatar da cewa siginar shigarwa da fitowar fitarwa ta dace da rashin ƙarfi. na layin watsawa daidai, zaku iya amfani da nau’ikan nau’ikan hanyoyin daidaitawa, zaɓin hanyar daidaitawa da haɗin cibiyar sadarwa da tsarin topology na wayoyi.

A. Don haɗin kai-zuwa-aya (fitarwa ɗaya yayi daidai da shigarwa ɗaya), zaku iya zaɓar farawa jerin daidaitawa ko madaidaiciya madaidaiciya. Tsohon yana da tsari mai sauƙi, ƙarancin farashi, amma babban jinkiri. Ƙarshen yana da sakamako mai dacewa daidai, amma tsari mai rikitarwa da tsada.

B. Don haɗin kai-zuwa-maki da yawa (fitarwa ɗaya yayi daidai da abubuwan da yawa), idan tsarin topology na cibiyar sadarwa shine sarkar Daisy, yakamata a zaɓi madaidaicin madaidaicin tashar. Lokacin da hanyar sadarwa ta kasance tsarin tauraro, koma zuwa tsarin aya zuwa aya.

Sarkar Star da Daisy sune tsarukan topological na asali guda biyu, kuma ana iya ɗaukar sauran sifofin azaman gurɓataccen tsarin, kuma ana iya ɗaukar wasu matakan sassauƙa don dacewa. A aikace, yakamata a yi la’akari da farashi, amfani da wutar lantarki da aiki. Gabaɗaya, ba a bin cikakkiyar daidaituwa, muddin tunani da sauran tsangwama da aka haifar ta rashin daidaituwa an iyakance su zuwa madaidaicin yarda.