Xa kufikwa kwi-impedance, iinjineli ezininzi zineengxaki ezininzi ngayo.Ngenxa yokuba zininzi izinto eziguquguqukayo ezichaphazela ixabiso le-impedance elawulwayo kwibhodi yesekethe eprintiweyo, nangona kunjalo, yintoni i-impedance kwaye yintoni esifanele siyiqwalasele xa kulawulwa i-impedance?
Inkcazo ye-Impedance?
I-Impedance sisimbuku sokumelana kunye nokusabela kwesekethe yombane elinganiswa kwi-Ohms.I-Impedans luphawu olutshintshayo lwangoku apho isantya somqondiso siyinto ebalulekileyo.Okukhona umkhondo uthatha ixesha elide okanye uphezulu ukuphindaphindeka, kokukhona kunyanzelekile ukuba kulawulwe i-impedance yomkhondo.Ukuphindaphindwa kweSiginali yinto ebalulekileyo yokulandela umkhondo onxibelelana nezinto ezifuna amakhulu amabini ukuya kwamathathu eMHz okanye ngaphezulu.
Ulungelelwaniso oluninzi olwahlukileyo lomkhondo luya kusetyenziswa kwiibhodi zeesekethe eziprintiweyo ukufikelela kwi-impedance elawulwayo.Singakwazi ukulawula i-impedance ngokusebenzisa izithuba kunye nemilinganiselo yeempawu zebhodi yesekethe.
Inqanaba lokulawula i-Impedans likhona
Ngokuqhelekileyo, kukho amanqanaba amathathu okulawulwa kwe-impedance ekhoyo kwiibhodi zesekethe eziprintiweyo.
1. Ulawulo lwe-Impedans
Ulawulo lwe-impedance lusetyenziswa ngokubanzi kuyilo oluphezulu kunye nokunyamezela okuqinileyo okanye ukucwangciswa okungaqhelekanga.Kukho iintlobo ezininzi ezahlukeneyo ze-impedance elawulwayo.Apho i-impedance yophawu isetyenziswa rhoqo.Ezinye iintlobo ziquka i-impedance yamaza, i-impedance yomfanekiso, kunye ne-impedance yegalelo.
2. Ukujongwa kwe-Impedans
Ukubukela kwe-Impedans kuthetha ukuhambelana kwi-impedance.Umkhondo wolawulo lwe-impedance uya kumiselwa ngobubanzi bomkhondo kunye nokuphakama kwe-dielectric, enokulungiswa njengoko kufuneka.
3. Akukho Ukulawulwa koMbane
Ngenxa yokuba ukunyamezelwa kwe-impedance kuyilo aluqinanga, ukunyanzeliswa okuchanekileyo kunokufezekiswa ngokuhambelana neenkcukacha ezisemgangathweni ngaphandle kokulawulwa kwe-impedance.I-impedance echanekileyo inokubonelelwa ngumenzi we-PCB ngaphandle kwamanyathelo ongezelelweyo, ke, lelona nqanaba libiza kakhulu.
Ukubaluleka kokuChaneka kulawulo lwe-impedance
Ukubaluleka kokuchaneka kubaluleke kakhulu ukuba iibhodi ze-impedance ezilawulwayo zisebenze ngokuchanekileyo.kuba abaqulunqi bePCB kufuneka bachaze umkhondo wokuphazamiseka kunye nonyamezelo olufunekayo.
Imibuzo engakumbi malunga nolawulo lwe-impedance, unokubonisana neqela leenjineli kwi-PHILIFAST, baya kukunika esona sisombululo silungileyo malunga neebhodi zakho zePCB.
Ixesha lokuposa: Jun-21-2021