Dukanmu mun san cewa yin PCB board shine don juya tsarin da aka tsara a cikin kwamiti na PCB na gaske.Don Allah kar a raina wannan tsari.Akwai abubuwa da yawa da suke yiwuwa bisa manufa amma da wuya a cimma su a cikin aikin, ko kuma wasu na iya cimma abubuwan da wasu ba za su iya cimma ba.

Manyan matsaloli guda biyu a fagen microelectronics sune sarrafa sigina masu yawa da sigina masu rauni.A wannan yanayin, matakin samar da PCB yana da mahimmanci musamman.Tsarin ka'ida iri ɗaya, sassa iri ɗaya, mutane daban-daban da aka samar da PCB za su sami sakamako daban-daban, don haka ta yaya za a yi allon PCB mai kyau?

1.Ka kasance bayyananne game da manufofin zane

Bayan samun aikin ƙira, abu na farko da za a yi shi ne bayyana manufofin ƙira, waɗanda su ne allon PCB na yau da kullun, allon PCB mai girma, ƙaramin allon PCB mai sarrafa sigina ko duka manyan mita da ƙaramin allon PCB na sarrafa sigina.Idan allon PCB ne na yau da kullun, idan dai shimfidar wuri yana da ma'ana kuma mai kyau, girman injin daidai yake, kamar layin kaya matsakaici da dogon layi, wajibi ne a yi amfani da wasu hanyoyin sarrafawa, rage kaya, layin dogon zuwa ƙarfafa tuƙi, mayar da hankali shi ne don hana dogon tunani tunani.Lokacin da akwai layukan sigina sama da 40MHz akan allon, dole ne a yi la'akari na musamman don waɗannan layukan siginar, kamar taɗi tsakanin layin da sauran batutuwa.Idan mitar ta fi girma, za a sami ƙarin ƙayyadaddun iyaka akan tsawon wayoyi.Bisa ga ka'idar cibiyar sadarwa na sigogi da aka rarraba, hulɗar tsakanin maɗaukaki mai sauri da wayoyi shine mahimmanci mai mahimmanci, wanda ba za a iya watsi da shi ba a cikin tsarin tsarin.Tare da haɓaka saurin watsawa na ƙofar, adawar da ke kan siginar siginar za ta karu daidai, kuma haɗin kai tsakanin layin siginar da ke kusa zai karu a daidai gwargwado.Yawancin lokaci, amfani da wutar lantarki da kuma zubar da zafi na manyan hanyoyin da'irori masu sauri suma suna da girma, don haka ya kamata a biya isasshen hankali ga PCB mai sauri.

Lokacin da akwai sigina mai rauni na matakin millivolt ko ma matakin microvolt akan allo, ana buƙatar kulawa ta musamman don waɗannan layin siginar.Ƙananan sigina suna da rauni sosai kuma suna da sauƙin shiga tsakani daga wasu sigina masu ƙarfi.Matakan garkuwa suna da mahimmanci sau da yawa, in ba haka ba za a rage yawan sigina-zuwa amo.Don haka sigina masu amfani sun nutsar da su ta hanyar amo kuma ba za a iya fitar da su yadda ya kamata ba.

Hakanan ya kamata a yi la'akari da ƙaddamar da hukumar a cikin tsarin ƙira, wurin da za a yi gwajin gwajin, keɓe wurin gwajin da sauran abubuwan ba za a iya watsi da su ba, saboda wasu ƙananan sigina da sigina masu girma ba za a iya ƙara su kai tsaye ba. binciken don aunawa.

Bugu da ƙari, ya kamata a yi la'akari da wasu abubuwan da suka dace, irin su adadin nau'in allon, siffar marufi na abubuwan da aka yi amfani da su, ƙarfin injiniyar jirgi, da dai sauransu. Kafin yin PCB board, don yin zane na zane. manufa a zuciya.

2.Know shimfidawa da buƙatun wayoyi na ayyukan abubuwan da aka yi amfani da su

Kamar yadda muka sani, wasu abubuwa na musamman suna da buƙatu na musamman a cikin shimfidawa da wayoyi, kamar LOTI da ƙaramar siginar analog da APH ke amfani da shi.Amsar siginar analog yana buƙatar samar da wutar lantarki mai ƙarfi da ƙarami.Sashin ƙaramin siginar analog yakamata ya kasance nesa da na'urar wutar lantarki gwargwadon yiwuwa.A kan allo na OTI, ƙaramin ɓangaren ƙara siginar shima an sanye shi da garkuwa ta musamman don kare ɓoyayyen kutse na lantarki.GLINK guntu da aka yi amfani da shi akan allon NTOI yana amfani da tsarin ECL, yawan wutar lantarki yana da girma kuma zafi yana da tsanani.Dole ne a yi la'akari da matsalar rashin zafi a cikin shimfidar wuri.Idan an yi amfani da zubar da zafi na yanayi, dole ne a sanya guntu GLINK a wurin da yanayin iska ya kasance mai santsi, kuma zafi da aka saki ba zai iya yin tasiri mai yawa akan sauran kwakwalwan kwamfuta ba.Idan allon yana sanye da ƙaho ko wasu na'urori masu ƙarfi, yana yiwuwa ya haifar da gurɓataccen gurɓataccen wutar lantarki wannan batu kuma ya kamata ya haifar da isasshen hankali.

3.Component layout la'akari

Ɗaya daga cikin abubuwan farko da za a yi la'akari da shi a cikin tsararrun kayan aiki shine aikin lantarki.Haɗa abubuwan haɗin gwiwa tare da kusanci tare gwargwadon yiwuwa.Musamman ga wasu layukan masu sauri, shimfidar wuri ya kamata su sanya shi a takaice kamar yadda zai yiwu, kuma ya kamata a raba siginar wutar lantarki da ƙananan na'urorin sigina.A kan yanayin saduwa da aikin da'ira, ya kamata a sanya kayan aikin da kyau, masu kyau, da sauƙin gwadawa.Hakanan ya kamata a yi la'akari da girman injina na allo da wurin soket.

Lokacin jinkirin watsawa na ƙasa da haɗin kai a cikin tsarin sauri kuma shine abu na farko da za a yi la'akari da shi a cikin ƙirar tsarin.Lokacin watsawa akan layin siginar yana da tasiri mai girma akan saurin tsarin gabaɗaya, musamman don babban saurin ECL mai sauri.Kodayake katangar da'ira da kanta tana da babban gudu, ana iya rage saurin tsarin sosai saboda haɓakar lokacin jinkirin da haɗin gwiwar gama gari ya kawo akan farantin ƙasa (kimanin jinkirin 2ns a kowane tsayin layin 30cm).Kamar rajistar canjin, mai lissafin aiki tare irin wannan nau'in aikin aiki tare yana da kyau a sanya shi a kan allo guda ɗaya, saboda lokacin jinkirin watsawa na siginar agogo zuwa allunan plug-in daban-daban ba daidai ba ne, na iya yin rajistar canji don samarwa. Babban kuskuren, idan ba za a iya sanya shi a kan allo ba, a cikin aiki tare shine wurin maɓalli, daga tushen agogo na gama gari zuwa allon toshe na tsawon layin agogo dole ne ya zama daidai.

4. La'akari da wayoyi

Tare da kammala ƙirar hanyar sadarwa ta OTNI da tauraron fiber, za a sami ƙarin allon 100MHz + tare da manyan layin siginar sauri da za a tsara a nan gaba.