izindaba

Isingeniso se-Transformer
Isetshenziselwa kakhulu: amaswishi edijithali asebenza kahle kakhulu;Imishini yokudlulisa i-SDH/ATM;I-ISDN.ADSL.VDSL.POE imishini yedatha yesevisi edidiyelwe;I-FILT optical fibre loop imishini;Ukushintsha kwe-Ethernet, njll.!Amaphampu edatha amadivayisi atholakala kumakhadi enethiwekhi ye-PCI yezinga lomthengi.Amaphampu edatha ayaziwa nangokuthiama-network transformersnoma i-network isolation transformers.Inemisebenzi emibili eyinhloko ekhadini lenethiwekhi, enye iwukudlulisa idatha, isebenzisa ikhoyili yokuhlanganisa imodi yokuhlukanisa ukuze ihlunge isignali yokuhlukanisa ye-PHY ukuze ithuthukise isignali, futhi iguqule ukuhlanganisa kumazinga ahlukene ngokusebenzisa inkambu kazibuthe ukuze kuxhunywe omunye umkhawulo wesignali. ikhebula lenethiwekhi;enye iwukuvikela uxhumano lwekhebula lenethiwekhi Amazinga ahlukene phakathi kwamadivaysi enethiwekhi ahlukene ukuvimbela ama-voltage ahlukene emishinini elimazayo ngokuya ngokudluliswa kwekhebula lenethiwekhi.Ngaphezu kwalokho, i-data mercury nayo ingadlala indima ethile ekuvikelweni kombani wemishini.
Ukusebenza Kwe-Transformer:
Emishini ye-Ethernet, ngokusho kwemishini ye-Ethernet, i-PHY ixhunywe endaweni ye-RJ45, futhi i-transformer yenethiwekhi izokwengezwa phakathi.Amanye ama-transformer aphakathi nendawo athinta phansi.Futhi lapho ukunikezwa kwamandla kuxhunyiwe, inani lamandla lingahluka, i-3.3V, 2.5V, kanye ne-1.8V.
Indima ye-Transformer:
1. Ukuhlukaniswa ngogesi
Izinga lesignali elakhiwe yinoma iyiphi i-chip ye-CMOS lihlala likhulu kuno-0V (kuya ngezidingo zokukhiqiza nokuklama kwe-chip), futhi i-PHY izoba nokulahlekelwa okukhulu kwengxenye ye-DC lapho isignali yokuphumayo ithunyelwa endaweni engamamitha angu-100. noma ngaphezulu.Uma ikhebula lenethiwekhi yangaphandle ixhumeke ngqo ku-chip, induction kagesi (umbani) kanye nogesi omile kungalimaza kalula i-chip.
Bese kuba nezindlela ezahlukene zokubeka phansi zemishini.Izindawo ezihlukene zegridi yamandla zizoholela kumazinga we-0V angahambisani nhlangothi zombili, futhi isignali idluliswa isuka ku-A iye ku-AB.Ngenxa yokuthi ileveli ye-0V yedivayisi A kanye neleveli engu-0V yephoyinti B ahlukile, angabangela igagasi elikhulu ukuthi ligeleze lisuka kumandla anamandla.Izisetshenziswa zigelezela kumishini enamandla aphansi.
Isiguquli senethiwekhi sisebenzisa ikhoyili yokuhlanganisa yemodi ehlukile ukuze sihlunge isignali yokuhlukanisa ye-PHY ukuze kuthuthukiswe isignali, futhi iguqule ukuhlanganisa kuya komunye umkhawulo wentambo yenethiwekhi yokuxhumana ngozibuthe.Lokhu akwenzi nje kuphela ukuthi ikhebula lenethiwekhi kanye ne-PHY kungabikho ukuxhumana ngokomzimba phakathi kwabo, isignali ishintshwa futhi idluliselwe, ingxenye ye-DC esignali inqanyuliwe, kodwa futhi idatha ingadluliselwa kumadivayisi ahlukene wezinga le-0V.
I-transformer yenethiwekhi ekuqaleni yayiklanyelwe ukumelana ne-voltage engu-2KV~3KV.Isebenza futhi njengesivikelo sombani.Imishini yenethiwekhi yabanye abangani ishiswa kalula ngokuduma kwezulu, iningi lazo okuwukuduma kwezulu.Ngenxa yokuklanywa okungekhona kwesayensi kwe-PCB, futhi isikhombimsebenzisi esikhulu semishini siyashiswa, ama-chips ambalwa ayashiswa, futhi i-transformer idlala indima yokuvikela.
I-transformer evikelayo ingahlangabezana nezidingo zokufakelwa kwe-IEEE802.3, kodwa ayikwazi ukucindezela i-EMI.
2. Ukwenqatshwa kwemodi evamile
Intambo ngayinye epheya esontekile kufanele isongwe komunye nomunye nge-helix ephindwe kabili.Inkambu kazibuthe edalwe yi-current egeleza ngocingo ngalunye iboshwe yi-spiral.Indlela yamanje egeleza ocingweni ngalunye lwepheya esontekile inquma izinga lomsindo okhishwa intambo ngayinye.Amazinga okudlulisela abangelwa imodi yokuhlukanisa kanye nemisinga yemodi evamile yomqhubi ngamunye ahlukile.Ukudluliswa komsindo okubangelwa imodi yokuhlukanisa yamanje kuncane, futhi umsindo unqunywa ngokuyinhloko imodi evamile yamanje.
1. Isignali yemodi ehlukile kumabhangqa asontekile
Kumasiginali wemodi yokuhlukanisa, amandla ayo ocingweni ngalunye luhamba lubheke ezinhlangothini eziphambene ngezintambo.Uma lezi zintambo ziboshwe ngokufana, lezi zintambo eziphikisanayo bezizokhiqiza izingxenyekazi kazibuthe ezihlukene ezinobukhulu obufanayo, okwenza okuphuma kuzo kumelane.
2. Isignali yemodi evamile kumabhangqa asontekile
Imodi evamile yamanje igeleza ngendlela efanayo kuzo zombili izintambo futhi ibuyela emhlabathini nge-parasitic capacitor Cp.Kulokhu, ama-currents akhiqiza amasimu kazibuthe anobukhulu obufanayo kanye ne-polarity, okuphuma kuyo okungakwazi ukumelana nomunye nomunye.Imisinga yemodi evamile yakha inkambu kazibuthe endaweni esontekile, esebenza ngokufana nothi.
3. Imodi evamile, umsindo wemodi ehlukile kanye ne-EMC yayo
Kunezinhlobo ezimbili zomsindo ezintanjeni: umsindo okhipha imisebe kanye nomsindo wokudlulisela ovela kumandla kanye namakhebula esignali.Lezi zigaba ezimbili zihlukaniswe ngomsindo wemodi evamile kanye nomsindo wemodi yokuhlukanisa.Umsindo wokudlulisa wemodi ehlukile umsindo wamanje odalwa amandla kagesi omsindo ngaphakathi kwethuluzi le-elekthronikhi olandela indlela efanayo neyamanje yesignali noma yamanje yokuphakela, njengoba kukhonjisiwe kuMfanekiso 4. Indlela yokunciphisa lo msindo ukubeka amakhoyili emodi yokuhlukanisa phakathi uchungechunge kulayini wamandla kanye nolayini wamandla.Isihlungi se-low pass siqukethe i-capacitor noma i-capacitor kanye ne-inductor ngokuhambisana ukuze kuncishiswe umsindo we-high frequency.
Amandla enkundla akhiqizwa yilo msindo ahambisana ngokuphambene nebanga ukusuka kukhebuli ukuya endaweni yokubuka, ahlobene kahle nesikwele sefrikhwensi, futhi ahlobene nendawo yamanje kanye nendawo yeluphu yamanje.Ngakho-ke, indlela yokunciphisa le misebe iwukwengeza isihlungi se-LC low-pass ekufakweni kwesignali ukuvimbela umsindo wamanje ukuthi ungangeni kukhebula;izintambo ezivikelekile noma eziyisicaba kufanele zisetshenziselwe ukuthwala amandla amanje abuyayo kanye nesignali ukuze kuncishiswe indawo eyiluphu.
Umsindo oqhutshwa yimodi evamile ukhiqizwa umsindo wamanje ogeleza phakathi komhlabathi nekhebula ngokusebenzisa amandla e-parasitic phakathi komhlaba nezinto zokusebenza, oqhutshwa amandla kagesi omsindo emishinini.
Indlela yokunciphisa umsindo wokudluliswa kwemodi evamile iwukuxhuma ikhoyili yokuminyanisa yemodi evamile ochungechungeni lwentambo kagesi noma intambo yokuphakela amandla.Ama-capacitor ahambisanayo.Yakha isihlungi se-LC sokuhlunga ukuze uhlunge umsindo wokudlulisa wemodi evamile.