Indlela yokunciphisa i-crosstalk kuyilo lwePCB?
I-Crosstalk ludibaniso lwe-electromagnetic engeyoyanjongo phakathi komkhondo ibhodi yesekethe eprintiweyo. Oku kudityaniswa kunokubangela ukuba i-pulses yesignali yomnye umkhondo idlule ingqibelelo yesignali yomnye umkhondo, nokuba ngaba abadibananga ngokomzimba. Oku kwenzeka xa isithuba phakathi kweetrayisi ezinxuseneyo siqinile. Nangona imikhondo inokuthi igcinwe kwindawo encinci yesithuba ngeenjongo zokuvelisa, isenokunganeli kwiinjongo zombane.

Qwalasela imizila emibini ehambelanayo. Ukuba umqondiso wokwahluka kumkhondo omnye unokuphakama okukhulu kunomnye umkhondo, unokuchaphazela ngokufanelekileyo omnye umkhondo. Emva koko, isignali kwi-trajectory “yexhoba” iya kuqala ukulinganisa iimpawu zendlela yomhlaseli, endaweni yokuqhuba umqondiso wayo. Xa oku kusenzeka, i-crosstalk iya kwenzeka.

I-Crosstalk ngokuqhelekileyo ithathwa njengeyenzeka phakathi kweengoma ezimbini ezihambelanayo ezihambelanayo kuluhlu olufanayo. Nangona kunjalo, i-crosstalk inokwenzeka ukuba yenzeke phakathi kweendlela ezimbini ezihambelanayo ezihambelanayo kumaleko ameleneyo. Oku kubizwa ngokuba yi-broadside coupling kwaye kusenokwenzeka ukuba yenzeke ngenxa yokuba izaleko ezimbini ezimeleneyo zemiqondiso zahlulwe sisixa esincinci sobukhulu obungundoqo. Ubukhulu bunokuba yi-4 mils (0.1 mm), ngamanye amaxesha ngaphantsi kwesithuba phakathi kweetrayisi ezimbini kumaleko afanayo.

Isithuba somkhondo ukuphelisa i-crosstalk sikholisa ukuba sikhulu kuneemfuno zesiqhelo zokulandela umkhondo

Ukuphelisa ukuba nokwenzeka kwe-crosstalk kuyilo
Ngethamsanqa, awukho kwinceba yentetho enqamlezileyo. Ngokuyila ibhodi yesekethe ukunciphisa i-crosstalk, unokuphepha ezi ngxaki. Ezi zilandelayo zezinye iindlela zoyilo ezinokukunceda ukuphelisa ukubakho kwe-crosstalk kwibhodi yesekethe:

Gcina umgama omde kangangoko phakathi kwesibini esahlukileyo kunye nezinye iindlela zomqondiso. Umgaqo webhontsi yi-gap = amaxesha ama-3 ububanzi bokulandelela.

Gcina owona mahluko mkhulu unokubakho phakathi komzila wewotshi kunye nezinye iindlela zomqondiso. Isikhewu esifanayo = amaxesha ama-3 umgaqo wobhontsi wokulandelela ububanzi nawo uyasebenza apha.

Gcina umgama omde kangangoko phakathi kwezibini ezahlukeneyo. Umgaqo wobhontsi apha mkhulu kancinci, isithuba = 5 umphinda-phinde ngobubanzi bomkhondo.

Izibonakaliso ze-asynchronous (ezifana ne-RESET, INTERRUPT, njl.) kufuneka zibe kude nebhasi kwaye zibe neempawu zesantya esiphezulu. Ziyakwazi ukuhanjiswa ecaleni kwe-on or off or power up signals, kuba ezi zibonakaliso azifane zisetyenziswe ngexesha lokusebenza okuqhelekileyo kwebhodi yesekethe.

Ukuqinisekisa ukuba imiqondiso emibini emeleneyo yemiqondiso iyatshintshana enye kwenye kumpakisho webhodi yesekethe iya kutshintshanisa izalathiso zendlela ezithe tye nezithe nkqo. Oku kuya kunciphisa amathuba okudityaniswa kwe-broadside coupling, njengoko imikhondo ingavumelekanga ukuba yandise i-parallel phezu komnye.

Indlela engcono yokunciphisa i-crosstalk enokubakho phakathi kweengqimba ezimbini zesignali ezikufutshane kukwahlula iileya ukusuka kumaleko wendiza yomhlaba phakathi kwabo kwi-microstrip configuration. Inqwelomoya yasemhlabeni ayiyi kwandisa kuphela umgama phakathi kweengqimba ezimbini zesignali, iya kunika nendlela yokubuya efunekayo yomgca wesignali.

Izixhobo zakho zoyilo zePCB kunye nezicelo zomntu wesithathu zinokukunceda uphelise i-crosstalk

Indlela isoftware yakho yoyilo enokukunceda uphelise i-crosstalk kuyilo lwePCB enesantya esiphezulu
Isixhobo soyilo sePCB sinezinto ezininzi ezakhelwe ngaphakathi ezinokukunceda uphephe ukungqubana kuyilo lwakho. Ngokucacisa izalathiso zendlela kunye nokudala izitaki ze-microstrip, imithetho yomaleko webhodi iya kukunceda uphephe ukudibanisa okubanzi. Usebenzisa imithetho yodidi lwenethiwekhi, uya kukwazi ukwabela amathuba amakhulu okulandela umkhondo kumaqela othungelwano oluchanabeke ngakumbi kwi-crosstalk. Iirutha ezimbini ezahlukeneyo zihamba ngababini njengezibini zokwenyani endaweni yokuzihambisa ngokwazo. Oku kuya kugcina isithuba esifunekayo phakathi kweetrayisi ezimbini ezidityanisiweyo kunye nolunye uthungelwano ukunqanda i-crosstalk.

Ukongeza kwimisebenzi eyakhelwe-ngaphakathi ye-software yoyilo lwe-PCB, kukho ezinye izixhobo ezinokukunceda ukuphelisa i-crosstalk kuyilo lwe-PCB oluphezulu. Kukho iikhaltyhuleyitha ezahlukeneyo zokukunceda uqonde ububanzi bomkhondo obuchanekileyo kunye nesithuba sendlela. Kukwakho nomqondiso wemfezeko ukulinganisa ukuhlalutya ukuba uyilo lwakho lunemiba enokubakho ye-crosstalk.

Ukuba kuvunyelwe ukuba kwenzeke, i-crosstalk inokuba yingxaki enkulu kwiibhodi zesekethe eziprintiweyo. Ngoku uyazi ukuba ujonge ntoni, uya kuba ulungele ukunqanda i-crosstalk ukuba ingenzeki. Ubuchule boyilo esixoxa ngalo apha kunye neempawu zePCB uyilo lwesoftware ziya kukunceda wenze uyilo olungena-crosstalk.