Imigaqo ekufuneka ilandelwe kuyo PCB uyilo

1) Ground circuit rules:

Umgaqo omncinci welupp kuthetha ukuba indawo yeluphu eyenziwe ngumgca wesiginali kunye nelopu yayo kufuneka ibencinci ngangokunokwenzeka. Indawo encinci yeluphu yile, i-radiation engaphantsi engaphantsi kwaye ukuphazamiseka kwangaphandle okuncinci kufunyenwe. Ngokwalo mgaqo, ukuhanjiswa kwenqwelomoya yomhlaba kunye nokuhamba komqondiso obalulekileyo kufuneka kuthathelwe ingqalelo ngexesha lokuhlelwa kwenqwelomoya emhlabeni ukunqanda iingxaki ezibangelwa kukudinwa komhlaba. Kuyilo lweplate kabini, kwimeko yekhefu elaneleyo lonikezelo lwamandla, kufuneka libe yinxalenye yokugcwaliswa ngokubhekisele ngasekhohlo, kwaye yongeze imingxunya eyimfuneko, qhagamshela imiqondiso emacala-mabini ngokufanelekileyo, kolunye uphawu lwesitshixo olwamkelayo emhlabeni kangangoko kunokwenzeka, kuyilo lwamaza aphakamileyo aphezulu, ingqwalaselo eyodwa kufuneka ibe yindiza yenqanaba lesekethe yomqondiso, kucetyiswa ipleyiti yesandwich kuyacetyiswa.

2) ulawulo lokuthintela

I-CrossTalk ibhekisa kuphazamiseko oludibanayo phakathi kweenethiwekhi ezahlukeneyo kwi-PCB ngenxa yocingo olude olufanayo, ikakhulu ngenxa yokuhanjiswa kwamandla kunye nokusasazwa kwe-inductance phakathi kwemigca efanayo. Amanyathelo aphambili okoyisa i-crosstalk ngala:

Yandisa ukubekwa kweekheyibhuli ezifanayo kwaye ulandele umgaqo we-3W.

Faka isiseko sodwa phakathi kwemigca efanayo.

Reduce the distance between the wiring layer and the ground plane.

3) ukukhusela ukukhusela

Sukuvumela isiphelo esinye ukuba sidade.

Eyona njongo iphambili kukuphepha “iimpembelelo ze-eriyali” kunye nokunciphisa ukuphazamiseka okungafunekiyo kwimitha kunye nolwamkelo, olunokuthi ngolunye uhlobo luzise iziphumo ezingalindelekanga.

6) Impedance ehambelana nemithetho yokuhlola:

Ukujikeleza ngesantya esiphezulu kwidijithali, ngaphezulu kwexesha lokulibaziseka kwexesha lokunyuka kwe-PCB (okanye ezantsi) kwikota, i-wiring injengolayini wokuhambisa, ukuze kuqinisekiswe ukuba umqondiso wokufakelwa kunye nokuphuma kwe-impedance kuthelekiswa ne-impedance yemigca yokuhambisa ngokuchanekileyo, ungasebenzisa iindlela ezahlukeneyo zendlela ehambelanayo, ukhetho lwendlela yokudibanisa kunye nonxibelelwano lwenethiwekhi kunye nolwakhiwo lwetheyibhile.

A.Ukuqhagamshela inqaku nencam (ukuphuma kwemveliso enye kungqinelana negalelo elinye), ungakhetha ukuqala kokudibanisa uthotho okanye ukungqinelana kwesiphelo. Eyokuqala inesakhiwo esilula, iindleko eziphantsi, kodwa ukulibaziseka okukhulu. Le yokugqibela inefuthe elifanelekileyo lokuthelekisa, kodwa ulwakhiwo oluntsonkothileyo kunye neendleko eziphezulu.

B.Ukuqhagamshela inqaku ukuya kwi-multipoint (imveliso enye iyahambelana neziphumo ezininzi), ukuba ubume be-topology yenethiwekhi luchungechunge lweDaisy, ukuthelekisa ukuphela kwesiphelo kufuneka kukhethwe. Xa uthungelwano luyinkwenkwezi, jonga kwisakhiwo se-point-to-point.

Ikhonkco yeNkwenkwezi neDaisy zizinto ezimbini ezisisiseko ze-topological, kwaye ezinye izinto zinokuthathwa njengokuguqulwa kwesakhiwo esisiseko, kwaye amanyathelo athile aguqukayo anokuthathwa ukuthelekisa. Ukuziqhelanisa, iindleko, ukusetyenziswa kwamandla kunye nokusebenza kufuneka kuthathelwe ingqalelo. Ngokubanzi, ukuthelekiswa ngokugqibeleleyo akulandelwa, okoko ukubonakaliswa kunye nolunye uphazamiso olubangelwa kukungalingani kunqunyelwe kuluhlu olwamkelekileyo.