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MuEthernet midziyo, kana PHY chip yakabatana neRJ45, network transformer inowanzowedzerwa.Imwe network transformer center tap grounding.Mamwe akabatanidzwa kune magetsi, uye kukosha kwesimba kunogona kuve kwakasiyana, 3.3V, 2.5V, 1.8V.Nzira yekubatanidza sei transformer yepakati pombi (PHY kupera)?

A. Sei mamwe mapombi epakati akabatana nemagetsi?Imwe grounding?

Izvi zvinonyanya kutsanangurwa neUTP mutyairi mhando ye phy chip.Mhando yekutyaira yakakamurwa kuita voltage drive uye ikozvino kutyaira.Paunenge uchityaira nevoltage, yakabatana nemagetsi;paunenge uchityaira neyazvino, yakabatana ne capacitor pasi.Naizvozvo, nzira yekubatanidza yepombi yepakati inowirirana zvakanyanya neiyo UTP port driver mhando ye phy chip, pamwe nedhetabheti uye referensi dhizaini yechip.

Ongorora: kana pombi yepakati yakabatana zvisizvo, network network ichave isina kugadzikana zvakanyanya kana kuvharika.

B. Sei mavheti akasiyana akabatanidzwa kune magetsi?

Izvi zvinotemerwawo neiyo UTP port level inotsanangurwa muPHY chip data inoshandiswa.Chiyero chinofanira kunge chakabatana nemagetsi anoenderana, kureva kuti, kana iri 1.8V, dhonza kusvika ku1.8V, kana iri 3.3V, dhonza kusvika ku3.3V.

Center tap effect:

1. Nekupa yakaderera impedance yekudzoka nzira yeyakajairwa modhi ruzha pamutsara wekusiyanisa, iyo yakajairika mode ikozvino uye yakajairika mode voltage patambo inoderedzwa;

2. Ipa DC bias voltage kana sosi yemagetsi kune mamwe ma transceivers.

Iyo yakabatanidzwa RJ45 yakajairika mode kudzvinyirira inogona kuita zvirinani, uye pesvedzero yeparasitic parameter idiki;saka, kunyangwe mutengo wacho wakanyanya kukwirisa, zvakare unofarirwa zvakanyanya nevainjiniya nekuda kwekubatanidzwa kwayo kwakanyanya, nzvimbo diki yekugara, yakajairika mode kudzvinyirira, parasitic parameter uye zvimwe zvakanakira.

3. Chii chinonzi network transformer?Hatingazvitore here?

Theoretically, inogona kubatanidzwa zvakananga kuRJ45 isina network transformer, uye inogonawo kushanda zvakajairika.Nekudaro, kureba kwekutapurirana kuchave kushoma, uye kana yakabatana kune akasiyana nhanho network interface, ichavawo nemhedzisiro.Uye kupindira kwekunze kune chip zvakare kwakakura kwazvo.Kana yakabatana netiweki transformer, inonyanya kushandiswa padanho rekubatanidza chiratidzo.1, Wedzera chiratidzo, kuitira kuti chinhambwe chekutumira chirebe;chechipiri, ita kuti chip ipere uye kuparadzaniswa kwekunze, kusimudzira kugona kwekudzivirira, uye kuwedzera kuchengetedzwa kwechip (semheni);chechitatu, kana yakabatana nemazinga akasiyana (senge imwe PHY chip iri 2.5V, imwe PHY chip iri 3.3V) yetiweki port, haizokanganisa midziyo yemumwe nemumwe.

Kazhinji kutaura, network transformer ine mabasa ekufambisa kwemasaini, impedance yekufananidza, kugadzirisa waveform, kudzvanywa kwechiratidzo uye kuparadzaniswa kwemagetsi.