A cikin suturar tagulla, don cimma burin da ake so na suturar tagulla, muna buƙatar kula da waɗannan batutuwa: 1. Idan akwai filaye da yawa a kan PCB, kamar SGND, AGND, GND, da dai sauransu, bisa ga daban-daban matsayi na PCB surface, mafi muhimmanci "ƙasa" da ake amfani da matsayin tunani zuwa da kansa rufe jan karfe, dijital ƙasa. da analog kasa.Babu da yawa da za a ce game da murfin jan karfe daban.A lokaci guda, kafin murfin jan karfe, layin wutar lantarki masu dacewa sun fara kauri: 5.0V, 3.3V, da sauransu.
Duk wata tambaya, don Allah RFQ, nan
2. Don haɗin maƙasudi ɗaya na filaye daban-daban, hanyar ita ce haɗi ta hanyar juriya na 0 ohm ko beads magnetic ko inductance. 3. Copper cladding kusa da crystal oscillator.The crystal oscillator a cikin da'irar ne mai high-mita watsi da hayaki.Hanyar ita ce a sanya jan ƙarfe a kusa da oscillator na crystal, sannan a niƙa harsashin oscillator na crystal daban. 4. Matsalar tsibirin (matattu), idan kuna tsammanin yana da girma sosai, to, ba zai yi tsada sosai ba don ayyana ƙasa ta hanyar da ƙara shi. 5. A farkon wayoyi, ya kamata a bi da waya ta ƙasa daidai, kuma ya kamata a yi amfani da waya ta ƙasa da kyau a lokacin da ake tafiya.Ba za ku iya dogara da ƙari na vias bayan murfin jan karfe don kawar da fil ɗin ƙasa don haɗi.Wannan tasirin yana da muni sosai. 6. Zai fi kyau kada a sami kusurwoyi masu kaifi a kan jirgi ( 7. Kada ku zuba jan karfe a cikin bude wuri na wiring a tsakiyar Layer na Multi-Layer board.Domin yana da wahala a gare ka ka yi wannan jan karfe zuba "ƙasa mai kyau". 8. Karfe da ke cikin na'urar, kamar magudanar zafi na ƙarfe, sandunan ƙarfafa ƙarfe, da sauransu, dole ne su kasance "ƙasa sosai". 9. Ƙarfe mai zubar da zafi na ma'aunin wutar lantarki mai tsayi uku dole ne ya kasance da kyau.Belin keɓewar ƙasa kusa da oscillator dole ne ya zama ƙasa sosai.A cikin kalma: idan an yi maganin ƙulla tagulla akan PCB da kyau, tabbas zai zama "riba fiye da fursunoni".Zai iya rage yankin dawowa na layin siginar kuma ya rage kutsawar wutar lantarki na siginar zuwa waje.
Kara sani game da mu, danna nan .
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