Emishinini ye-Ethernet, lapho i-chip ye-PHY ixhunywe ku-RJ, i-transformer yenethiwekhi ngokuvamile iyengezwa.Ukuthepha okuphakathi kwamanye ama-transformer enethiwekhi kusekelwe phansi.Ezinye zixhunywe kugesi, futhi inani lamandla lingahluka, kufaka phakathi i-3.3V, 2.5V, kanye ne-1.8V.Bese uxhuma kanjani umpompi ophakathi nendawo (ukuphela kwe-PHY) kwe-transformer?
A. Kungani abanye ompompi abamaphakathi bexhunywe kumandla?Ezinye zisekelwe?
Lokhu kunqunywa ikakhulukazi uhlobo lomshayeli wembobo ye-UTP ye-chip ye-PHY esetshenzisiwe.Izinhlobo zamadrayivu zihlukaniswe ngokuthi: i-voltage drive kanye nedrayivu yamanje.Xhuma ukunikezwa kwamandla lapho ushayela nge-voltage;xhuma i-capacitor emhlabathini lapho ushayela nge-current.Ngakho-ke, indlela yokuxhuma kampompi ophakathi nendawo ihlobene eduze nohlobo lwedrayivu yembobo ye-UTP ye-PHY chip.Ngesikhathi esifanayo, sicela ubhekisele kumininingwane yedatha kanye nomklamo wereferensi we-chip.
Qaphela: Uma umpompi ophakathi uxhumeke ngokungalungile, imbobo yenethiwekhi izozinzisa ngokwedlulele noma ivinjwe.
Emishinini ye-Ethernet, lapho i-chip ye-PHY ixhunywe ku-RJ, i-transformer yenethiwekhi ngokuvamile iyengezwa.Ukuthepha okuphakathi kwamanye ama-transformer enethiwekhi kusekelwe phansi.Ezinye zixhunywe kugesi, futhi inani lamandla lingahluka, kufaka phakathi i-3.3V, 2.5V, kanye ne-1.8V.Bese uxhuma kanjani umpompi ophakathi nendawo (ukuphela kwe-PHY) kwe-transformer?
B. Kungani ixhunywe ku-voltage ehlukile uma ixhunywe kugesi?
Lokhu futhi kunqunywa ileveli yembobo ye-UTP ecaciswe kudatha ye-PHY chip esetshenzisiwe.Izinga kufanele lixhunywe ku-voltage ehambisanayo, okungukuthi, uma i-1.8v, izodonswa kuze kufike ku-1.8v, uma i-3.3v, izodonswa kuze kufike ku-3.3v.
Indima yompompi ophakathi nendawo we-transformer ye-LAN:
1. Yehlisa i-voltage yemodi evamile yamanje kanye nemodi evamile kukhebula ngokunikeza indlela ephansi yokubuya kwe-impedance yomsindo wemodi evamile emugqeni wokuhlukanisa;
2. Kwamanye ama-transceivers, hlinzeka nge-DC echemile kagesi noma umthombo wamandla.
Ukucindezelwa kwemodi evamile ye-RJ ehlanganisiwe kungaba ngcono, futhi imingcele ye-parasitic nayo ayithinteki kancane;ngakho-ke, nakuba intengo iphakeme kakhulu, ibuye idume kakhulu ngenxa yokuhlanganiswa kwayo okuphezulu, isikhala esincane, ukucindezelwa kwemodi evamile, imingcele ye-parasitic nezinye izinzuzo.wamukelekile.
Iyini indima ye-network transformer?Awukwazi ukuyithatha?
Uma sikhuluma ngokwethiyori, ingasebenza ngokujwayelekile ngaphandle kokuxhuma i-transformer yenethiwekhi futhi ixhumeke ngqo ku-RJ.Kodwa-ke, ibanga lokudlulisela lizokhawulelwa, futhi lizophinde lithinteke uma lixhunywe embotsheni yenethiwekhi yezinga elihlukile.Futhi ukuphazamiseka kwangaphandle ku-chip nakho kuhle.Uma i-transformer yenethiwekhi ixhunyiwe, isetshenziselwa ikakhulukazi ukuhlanganisa izinga lesignali.1. Qinisa isignali ukuze wenze ibanga lokudlulisela libe kude;2. Hlukanisa isiphetho se-chip ngaphandle, thuthukisa amandla okumelana nokuphazamiseka, futhi ukhuphule ukuvikeleka kwe-chip (njengokushaya kombani);3. Uma uxhunywe kumazinga ahlukene (njengama-chips athile e-PHY angu-2.5V, kanti amanye ama-PHY chips angu-3.3V), ngeke kuthinte izisetshenziswa zomunye nomunye.
Ngokuvamile, i-transformer yenethiwekhi ikakhulukazi inemisebenzi yokudlulisa isignali, ukufaniswa kwe-impedance, ukulungiswa kwe-waveform, ukucindezelwa kwe-clutter yesignali kanye nokuhlukaniswa kwe-voltage ephezulu.
Isikhathi sokuthumela: May-08-2021