iindaba

Kwizixhobo ze-Ethernet, xa i-chip ye-PHY ixhunyiwe kwi-RJ, i-transformer yenethiwekhi idla ngokudibaniswa.Itephu esembindini yezinye iziguquli zenethiwekhi isekelwe.Abanye badityaniswe kunikezelo lwamandla, kwaye ixabiso lonikezelo lwamandla lingahluka, kubandakanywa i-3.3V, 2.5V, kunye ne-1.8V.Emva koko uqhagamshela njani impompo ephakathi (PHY ekupheleni) ye-transformer?

A. Kutheni ezinye iimpompo zaseziko ziqhagamshelwe kumandla?Ezinye ziphantsi?

Oku kumiselwa ikakhulu luhlobo lomqhubi wezibuko le-UTP letshiphu ye-PHY esetyenziswayo.Iintlobo zokuqhuba zihlulwe zibe: i-voltage drive kunye ne-current drive.Qhagamshela umbane xa uqhuba nge-voltage;qhagamshela i-capacitor emhlabeni xa uqhuba ngoku.Ke ngoko, indlela yoqhagamshelo yempompo yeziko inxulumene ngokusondeleyo nohlobo lwe-UTP ye-port drive ye-PHY chip.Kwangaxeshanye, nceda ujonge kwi-database kunye noyilo lwereferensi ye-chip.

Qaphela: Ukuba itephu ephakathi iqhagamshelwe ngokungalunganga, i-port yenethiwekhi iya kungazinzi kakhulu okanye ivalwe.

Kwizixhobo ze-Ethernet, xa i-chip ye-PHY ixhunyiwe kwi-RJ, i-transformer yenethiwekhi idla ngokudibaniswa.Itephu esembindini yezinye iziguquli zenethiwekhi isekelwe.Abanye badityaniswe kunikezelo lwamandla, kwaye ixabiso lonikezelo lwamandla lingahluka, kubandakanywa i-3.3V, 2.5V, kunye ne-1.8V.Emva koko uqhagamshela njani impompo ephakathi (PHY ekupheleni) ye-transformer?

B. Kutheni idityaniswe kumbane ohlukileyo xa iqhagamshelwe kunikezelo lwamandla?

Oku kukwamiselwa yinqanaba lezibuko le-UTP elichazwe kwidatha yechip ye-PHY esetyenzisiweyo.Inqanaba kufuneka lixhunywe kumbane ohambelanayo, oko kukuthi, ukuba i-1.8v, iya kutsalwa ukuya kwi-1.8v, ukuba i-3.3v, iya kutsalwa ukuya kwi-3.3v.

Indima yempompo esembindini yesiguquli se-LAN:

1. Ukunciphisa imowudi eqhelekileyo yangoku kunye nemowudi yemowudi eqhelekileyo kwikhebula ngokubonelela ngendlela yokubuyisela i-impedance ephantsi yengxolo yemowudi eqhelekileyo kumgca wokwahlukana;

2. Kwezinye ii-transceivers, bonelela nge-DC bias voltage okanye umthombo wamandla.

I-RJ edibeneyo yokunyanzeliswa kwemodi eqhelekileyo ingaba ngcono, kwaye iiparitha zeparasitic nazo zichaphazeleka kancinci;ngoko ke, nangona ixabiso liphezulu kakhulu, likwadume kakhulu ngenxa yokuhlanganiswa kwayo okuphezulu, indawo encinci, ukunyanzeliswa kwemodi eqhelekileyo, iiparamitha zeparasitic kunye nezinye iingenelo.Wamkelekile.

Yintoni indima ye-network transformer?Ngaba awukwazi ukuyichola?

Ukuthetha ngokwethiyori, inokusebenza ngokuqhelekileyo ngaphandle kokudibanisa i-network transformer kunye nokudibanisa ngokuthe ngqo kwi-RJ.Nangona kunjalo, umgama wothumelo uya kulinganiselwa, kwaye uya kuchaphazeleka kwakhona xa uqhagamshelwe kwi-port yenethiwekhi yezinga elahlukileyo.Kwaye ukuphazamiseka kwangaphandle kwi-chip nakho kukhulu.Xa i-transformer yenethiwekhi ixhunyiwe, isetyenziselwa ubukhulu becala ukudibanisa inqanaba lomqondiso.1. Yomeleza umqondiso ukwenza umgama wothumelo ube kude;2. Ukwahlula isiphelo se-chip ngaphandle kwangaphandle, phucula amandla okuthintela ukuphazamiseka, kunye nokwandisa ukukhuselwa kwe-chip (njengokubetha kombane);3. Xa uqhagamshelwe kumanqanaba ahlukeneyo (afana nezinye iitshiphusi ze-PHY ziyi-2.5V, kwaye ezinye iitshiphusi ze-PHY ziyi-3.3V), aziyi kuchaphazela izixhobo zomnye nomnye.
Ngokubanzi, i-network transformer ikakhulu inemisebenzi yokuhanjiswa komqondiso, ukulinganisa i-impedance, ukulungiswa kwamaza, ukunyanzeliswa kwe-clutter kunye nokwahlulwa kwamandla aphezulu.