I-10 Layer ENIG FR4 Impedance Control PCB
Kutheni uLawula iMpedance kwiiPCBs?
Xa umqondiso ufuna i-impedance ethile ukuze isebenze ngokufanelekileyo, i-impedance elawulwayo kufuneka ikhethwe.Kwizicelo ze-high-frequency, ibhodi ye-elektroniki epheleleyo ene-impedance eqhubekayo ibalulekile ukukhusela idatha edlulisiweyo kwinkohlakalo kunye nokugcina ukucaca komqondiso.Okukhona i-trajectory inde okanye iphezulu i-frequency, kokukhona kufuneka uhlengahlengiso.Nakuphi na ukungabikho kobungqongqo kweli nqanaba kunokunyusa ixesha lokutshintsha kwezixhobo zombane okanye iisekethe kwaye kukhokelela kwiimpazamo ezingalindelekanga.
Emva kokuba icandelo lifakwe kwisiphaluka, i-impedance engalawulwayo kunzima ukuyihlalutya.Amacandelo anezakhono ezahlukeneyo zokunyamezela ngokuxhomekeke kwibhetshi yazo.Ukongezelela, iinkcukacha zabo zixhomekeke ekutshintsheni kweqondo lokushisa, oku kunokukhokelela ekungaphumeleli.Kule meko, ukutshintshwa kwecandelo kunokubonakala ngathi isisombululo ekuqaleni, kodwa eneneni, ukunyanzeliswa komkhondo okungafanelekanga kuyingcambu yengxaki.
Kungenxa yoko le nto ukulandelela i-impedance kunye nokunyamezela kwayo kufuneka kujongwe kwangokoibhodi yesekethe eprintiweyo(PCB)uyilo.Umyili kufuneka asebenzisane kunye nomvelisi ukuqinisekisa ukuba ixabiso lecandelo liyafezekiswa.
Iimpawu zokuphazamiseka kwePCB
I-PCB yokulandela umkhondo i-impedance ineempawu ezininzi zokufunda i-impedance.PCB ibhodi ibhodi impedance ibandakanya: permittivity, ubude, ububanzi, ukuphakama, PCB imida yokuvelisa / unyamezelo, kunye neempawu umgama phakathi track kunye nezinye ubhedu.
Usetyenziso lwe-Impedans Control PCB
Ulawulo lwe-impedance lubandakanya ukulinganisa i-impedance yeendlela ezithile zokuqhuba ngexesha lokwenziwa kwebhodi kunye nokuqinisekisa ukuba kungaphakathi kwemida echazwe ngumyili.Obu buchwephesha bubiza imali eninzi, kodwa iye yamkelwa eluntwini ukusukela kwiminyaka yoo-2000 njengoko ukuphindaphindwa kwamacandelo e-elektroniki kuqhubeka ukwanda.Umzekelo, yisebenzise kwezi mveliso zilandelayo:
Unxibelelwano lwe-analog kunye nedijithali
Ukusetyenzwa komqondiso wevidiyo
Ibhokisi ye-Intanethi, iTV, iGPS, umdlalo wevidiyo, ikhamera yedijithali
Iikhompyuter, iitafile, iifowuni
Imodyuli yolawulo lweemoto
