xov xwm

Hauv Ethernet cov cuab yeej, thaum PHY nti txuas nrog RJ, lub network transformer feem ntau yog ntxiv.Lub hauv paus kais ntawm qee lub network transformers yog grounded.Qee qhov txuas nrog cov khoom siv hluav taws xob, thiab cov nqi hluav taws xob tuaj yeem sib txawv, suav nrog 3.3V, 2.5V, thiab 1.8V.Tom qab ntawd yuav ua li cas txuas rau nruab nrab kais (PHY kawg) ntawm transformer?

A. Vim li cas qee qhov chaw kais dej txuas nrog lub hwj chim?Ib txhia yog av?

Qhov no feem ntau yog txiav txim los ntawm UTP chaw nres nkoj tsav hom ntawm PHY nti siv.Cov hom tsav tau muab faib ua: voltage tsav thiab tam sim no tsav.Txuas lub fais fab mov thaum tsav tsheb nrog voltage;txuas lub capacitor rau hauv av thaum tsav tsheb nrog tam sim no.Yog li ntawd, txoj kev sib txuas ntawm qhov chaw kais yog ze ze rau UTP chaw nres nkoj tsav hom ntawm PHY nti.Nyob rau tib lub sijhawm, thov xa mus rau daim ntawv teev cov ntaub ntawv thiab siv tus qauv tsim ntawm lub nti.

Nco tseg: Yog tias qhov nruab nrab kais txuas txuas tsis raug, qhov chaw nres nkoj network yuav tsis ruaj khov heev lossis txawm tias thaiv.

Hauv Ethernet cov cuab yeej, thaum PHY nti txuas nrog RJ, lub network transformer feem ntau yog ntxiv.Lub hauv paus kais ntawm qee lub network transformers yog grounded.Qee qhov txuas nrog cov khoom siv hluav taws xob, thiab cov nqi hluav taws xob tuaj yeem sib txawv, suav nrog 3.3V, 2.5V, thiab 1.8V.Tom qab ntawd yuav ua li cas txuas rau nruab nrab kais (PHY kawg) ntawm transformer?

B. Vim li cas nws txuas rau qhov sib txawv voltage thaum nws txuas nrog lub hwj chim?

Qhov no kuj tau txiav txim los ntawm UTP chaw nres nkoj theem teev nyob rau hauv PHY nti cov ntaub ntawv siv.Cov theem yuav tsum tau txuas mus rau qhov sib txuam voltage, uas yog, yog tias nws yog 1.8v, nws yuav rub mus txog 1.8v, yog tias nws yog 3.3v, nws yuav rub mus txog 3.3v.

Lub luag haujlwm ntawm qhov chaw kais ntawm LAN transformer:

1. Txo cov hom hom tam sim no thiab ntau hom voltage ntawm lub cable los ntawm kev muab ib txoj kev uas tsis tshua muaj impedance rov qab rau hom suab nrov ntawm cov kab sib txawv;

2. Rau qee qhov transceivers, muab DC bias voltage lossis lub zog hluav taws xob.

Kev sib koom ua ke RJ hom kev tiv thaiv tuaj yeem ua tau zoo dua, thiab cov kab mob cab kuj tseem cuam tshuam tsawg dua;yog li ntawd, txawm hais tias tus nqi kuj tseem nrov heev vim nws qhov kev sib koom ua ke siab, qhov chaw me me, hom kev sib tsoo, cov kab mob parasitic thiab lwm yam zoo.txais tos.

Lub luag haujlwm ntawm network transformer yog dab tsi?Koj tsis tuaj yeem khaws nws?

Kev hais lus theoretical, nws tuaj yeem ua haujlwm ib txwm tsis txuas lub network transformer thiab txuas ncaj qha rau RJ.Txawm li cas los xij, qhov kev ncua deb yuav raug txwv, thiab nws tseem yuav cuam tshuam thaum nws txuas nrog lub network chaw nres nkoj ntawm qib sib txawv.Thiab sab nraud cuam tshuam rau lub nti kuj zoo heev.Thaum lub network transformer txuas nrog, nws yog tsuas yog siv rau cov teeb liab theem coupling.1. Txhim kho lub teeb liab kom qhov kev sib kis tau deb dua;2. Tshem tawm cov nti kawg ntawm sab nraud, txhim khu kev tiv thaiv kev cuam tshuam, thiab nce kev tiv thaiv ntawm cov nti (xws li xob laim tawm tsam);3. Thaum txuas nrog ntau theem (xws li Qee lub PHY chips yog 2.5V, thiab qee qhov PHY chips yog 3.3V), nws yuav tsis cuam tshuam rau ib leeg cov khoom siv.
Feem ntau, lub network transformer feem ntau muaj cov haujlwm ntawm cov teeb liab kis tau tus mob, impedance txuam, waveform kho, teeb liab clutter suppression thiab high voltage rho tawm.