Ny fanadihadiana momba ny varahina dia niparitaka PCB

If there are many PCB ground, SGND, AGND, GND, etc., it is required to use the most important ground as reference to independently coat copper according to the different PCB board position, that is, connect the ground together.

Misy antony marobe amin’ny fametrahana varahina amin’ny ankapobeny. 1, EMC. Ho an’ny faritra midadasika na famatsiana herinaratra mametraka varahina, dia hanana andraikitra miaro izy, manokana ny sasany, toy ny PGND.

2. Fepetra takiana amin’ny PCB. Generally, in order to ensure the electroplating effect, or no deformation of lamination, for PCB board with less wiring layer copper.

3, takiana amin’ny fahamendrehana famantarana, manome signal digital nomerika avo lenta backflow lalana, ary mampihena ny tariby dc tambajotra. Of course, there are heat dissipation, special device installation requirements shop copper and so on. Misy antony marobe amin’ny fametrahana varahina amin’ny ankapobeny.

1, EMC. Ho an’ny velaran-tany lehibe na famatsian-tsolika dia manaparitaka varahina, hanana andraikitra miaro izy, manokana ny sasany, toy ny PGND.

2. Fepetra takiana amin’ny PCB. Generally, in order to ensure the electroplating effect, or no deformation of lamination, for PCB board with less wiring layer copper.

3, fitakiana tsy fivadihana famantarana, amin’ny signal digital nomerika avo lenta ny lalan-kivoana rehetra, ary mampihena ny tariby DC. Of course, there are heat dissipation, special device installation requirements shop copper and so on.

A shop, a major advantage of copper is to reduce ground impedance (there was a large part of the so-called anti-jamming is to reduce ground impedance) of the digital circuit exists in a large number of peak pulse current, thereby reducing ground impedance is more necessary to some, is generally believed that for the whole circuit composed of digital devices should be large floor, for the analog circuit, Ny tadin’ny tany noforonina tamin’ny alàlan’ny fametahana varahina dia hiteraka fahatapahan’ny herinaratra elektromagnetika (ankoatry ny boriborintany matetika). Noho izany, tsy ny boriborintany rehetra no mila varahina manerantany (BTW: ny fampisehoana takela-barahina vita amin’ny varahina dia tsara kokoa noho ny sakana iray manontolo)

Ny roa, ny maha-zava-dehibe ny fizarana varahina mametraka: 1, ny fametrahana ny tariby varahina sy ny tany dia mifamatotra, mba hahafahantsika mampihena ny faritra boribory 2, manaparitaka faritra maro amin’ny varahina mitovy mba hampihenana ny fanoherana ny tany, mampihena ny fihenan’ny tsindry amin’ireo teboka roa ireo, ny tarehimarika roa, na ny simulation dia tokony fametrahana varahina mba hampitomboana ny fahafahan’ny anti-interferensi, ary amin’ny fotoana haavo matetika dia tokony hiparitaka ihany koa ny tany nomerika sy ny analog azy ireo hanasaraka ny varahina, avy eo ampifandraisin’izy ireo amin’ny teboka tokana, The single point can be connected by a wire wound around a magnetic ring several times. Na izany aza, raha tsy dia avo loatra ny refesina, na ny toetran’ny fiasan’ny zavamaneno tsy ratsy dia mety milamina izy io. The crystal oscillator acts as a high-frequency transmitter in the circuit. You can lay copper around it and ground the crystal shell, which is better.

Inona no maha samy hafa ny vatan’ny varahina sy ny varahina? Manokana hamakafakana momba ny karazana vokariny 3: famonoana feo mahafinaritra 1 tsara tarehy 2 mba hampihenana ny fanelingelenana avo lenta (ao amin’ny fizaran-tany misy ny antony) araky ny torolàlana momba ny tariby: herinaratra miaraka amin’ny fananganana arak’izay azo atao hoe maninona no ampiana grid ah dia tsy miaraka amin’ilay principe tsy mifanaraka aminy? Raha ny fahitana ny fahita matetika dia tsy mety amin’ny tariby matetika raha ny tariby maranitra indrindra dia ny tariby maranitra, ao anatin’ny sosona famatsiana herinaratra dia mihoatra ny 90 degre no olana be. Ny antony anaovanao an’izany fomba izany dia resaka asa-tanana fotsiny: jereo ireo nohosorana tanana ary jereo raha nolokoina toy izany izy ireo. Hitanareo ity sary ity ary azoko antoka fa nisy puce iray teo aminy satria nisy ny dingana antsoina hoe soldering onja rehefa apetrakao io ary hanafana ny tabilao eo an-toerana izy ary raha apetrakao ao anaty varahina daholo ireo coefficients hafanana manokana ny lafiny roa dia samy hafa ary ny birao dia hikororosy ary avy eo hipoitra ny olana. Ao amin’ny fonony vy (izay takian’ny fizotrany ihany koa) dia mora be ny manao fahadisoana amin’ny PIN an’ny puce, ary hiakatra amin’ny tsipika mahitsy ny tahan’ny fandavana. Raha ny tena izy, io fomba io koa dia misy fatiantoka: Eo ambanin’ny fizotran’ny harafesintsika ankehitriny: Mora be ho an’ny sarimihetsika ny mifikitra amin’izany, ary avy eo ao amin’ny tetik’asa asidra, mety tsy ho simba io teboka io, ary be ny fako, fa raha misy kosa dia ny tabilao ihany no vaky ary ilay sombin-kazo mivoaka miaraka aminy ny tabilao! From this point of view, can you see why it was drawn that way? Mazava ho azy, misy ihany koa ny takelaka latabatra tsy misy takelaka, raha ny fahitana ny tsy fitovizan’ny vokatra dia mety misy toe-javatra 2: 1, ny fizotrany manimba dia tena tsara; 2. Raha tokony hivezivezy amin’ny onja izy dia mampiasa lasitra lafaoro mandroso kokoa, fa amin’ity tranga ity, ny fampiasam-bola amin’ny tsipika fivorian’ny fiangonana dia hitombo 3-5 heny.