Kwinkqubo yoyilo lwe-PCB, ngaphambi kohambo, ngokubanzi sibeka izinto esifuna ukuyila, kwaye sibale imvume esekwe kubungqingqwa, i-substlest, inani lezinye kunye nolunye ulwazi. Emva kokubalwa, lo mxholo ulandelayo unokufumaneka ngokubanzi.

Njengoko kunokubonwa kumzobo ongentla, uyilo oluphezulu lwenethiwekhi olungentla lulawulwa ngokubanzi ngama-50 oohms, abantu abaninzi baya kucela ukuba kutheni kufuneka balawule ngokwe-50 ohms okanye ama-80 ohms?
Okokuqala, ii-ohms ezingama-50 zikhethwe ngokuzenzekelayo, kwaye wonke umntu okwishishini wamkela eli xabiso. Ngokubanzi, imigangatho ethile kufuneka yenziwe ngumbutho owamkelweyo, kwaye wonke umntu ulisile ngokwemigangatho.
Inxalenye enkulu yetekhnoloji ye-elektroniki ivela emkhosini. Okokuqala, itekhnoloji isetyenziswa emkhosini, kwaye itshintshelwe emkhosini ukuya kusetyenziswa. Kwiintsuku zokuqala zezicelo ze-microwave, ngexesha lemfazwe yehlabathi yesibini, ukhetho lweMefidi luxhomekeke ngokupheleleyo kwiimfuno zokusetyenziswa, kwaye kwakungekho nto iphantsi. Ngokuqhubela phambili kwetekhnoloji, imigangatho yokufumana imigangatho kufuneka inikezwe ukuze ichithe ibhalansi phakathi kwezoqoqosho kunye nokulula.

EUnited States, ezona zinto zisetyenziswa kakhulu zisetyenziswa ziintonga ezikhoyo kunye nemibhobho yamanzi. I-51.5 I-OHMS ixhaphake kakhulu, kodwa ii-adapter kunye nabaguquli babonge kwaye basebenzisa zi-50-51,5 IOHMS; Oku kuconjululwe umkhosi odibeneyo kunye nomkhosi wenqanawa. Ingxaki, umbutho obizwa ngokuba nguJan wasungulwa (emva kwexesha uDesc), waphuhliswa ngokukodwa nguMil, kwaye ekugqibeleni bakhethe ii-ohms ezingama-50 emva kokuqwalaselwa, kwaye baguqulwa baba ziintambo ezahlukeneyo. Imigangatho.

Ngeli xesha, umgangatho waseYurophu yayingama-60 oohms. Kungekudala emva koko, phantsi kwempembelelo yeenkampani ezibalaseleyo ezifana neHewlett-Paking, baseYurophu banyanzeliswa ukuba batshintshe, ngoko ke ama-50 ee-OHMs baba ngumgangatho kwishishini. Iba yindibano, kwaye i-PCB iqhagamshelwe kwiintambo ezahlukeneyo ekugqibeleni zifune ukuthobela umgangatho wama-50 o-OHM odidekile wokuhambelana.

Okwesibini, ukuqulunqwa kwemigangatho ngokubanzi kuya kusekelwa kuqwalaselo ngokubanzi lwenkqubo ye-PCB yemveliso ye-PCB kunye nokusebenza koyilo kunye nokunokwenzeka.

Ukusuka kwimbono yemveliso ye-PCB kunye netekhnoloji yokuqhubela phambili, kwaye kuthathelwa ingqalelo izixhobo zovelwano zikhoyo ze-PCB, kulula ukuvelisa i-PCBS nge-50 ye-OHM. Ukusuka kwinkqubo yokubala eMpeyinti, kunokubonwa ukuba ukuphakama okuphantsi kakhulu kufuna ububanzi bomgangatho obanzi kunye nenqanaba eliphakathi okanye eliphakathi okanye kunzima kakhulu ukuhlangabezana neBhodi yangoku; Eyona nto iphambili kakhulu ifuna umgca omncinci kakhulu kunye namajelo eendaba okanye amaDaci amancinci amancinci angabalulekanga ekucinezelweni kwe-EMI kunye ne-crostalk. Kwangelo xesha, ukuthembeka kokuqhubela phambili kweebhodi ezininzi zebhodi ezahlukeneyo kwaye kwimbono yemveliso yobuninzi iya kuba lihlwempu. Lawula i-OHM engama-50. Ngaphantsi kwendalo yokusebenza kokusebenzisa iibhodi eziqhelekileyo (i-Fr4, njl njl) kunye neeBhodi eziPhezulu, zivelisa iimveliso eziqhelekileyo zeBhodi, ezinje nge-1mm, i-1mm, njl. Njl.). Ububanzi bomgca obuqhelekileyo (4 ~ 10ml) bunokwenziwa. Umzi-mveliso ulungele ukuqhubekeka, kwaye izixhobo ezifuneka ukuba zenziwa uqhubekeke ziphezulu kakhulu.

Ukusuka kwimbono yoyilo lwe-PCB, i-HMS engama-50 ikhethwe emva kokuqwalaselwa ngokubanzi. Ukusuka kwintsebenzo ye-PCB Ruraces, iMedi ePhakathi ihlala ibhetele. Umgca wokuhambisa onomgangatho wobubanzi obunikiweyo, ukusondelela umgama uye kwindiza, kuya kuncitshiswa i-EMI ehambelana nayo, kwaye i-crostalk iya kuncitshiswa. Nangona kunjalo, kwimbono yendlela epheleleyo yomqondiso, enye yezona zinto zibalulekileyo kufuneka ziqwalaselwe, oko kukuthi, ukukwazisa kwe-chip. Kwiintsuku zokuqala, uninzi lwe-chips alunakuqhutywa imigca yothumelo ngokunyanzela ngaphantsi kwe-50 yee-ohms, kwaye imigca yothumelo enemigangatho ephezulu yayingazinzisi. Ke i-50 ye-ohm isetyenziswa njengokulalanisa.

Umthombo: Eli nqaku lidluliselwa kwi-Intanethi, kwaye ilungelo lokushicilela lembhali wokuqala.