probanner

nkhani

Mu zida za Ethernet, pomwe chipangizo cha PHY chimalumikizidwa ndi RJ, chosinthira ma netiweki chimawonjezeredwa. Pampopi wapakati wamagetsi ena amtaneti ali pansi. Zina zimalumikizidwa ndi magetsi, ndipo mtengo wamagetsi umatha kukhala wosiyana, kuphatikiza 3.3V, 2.5V, ndi 1.8V. Ndiye momwe mungagwirizanitsire kachizindikiro pakati (PHY kumapeto) kwa thiransifoma?

A. Chifukwa chiyani matepi ena apakati amalumikizidwa ndi mphamvu? Ena ali pansi?

Izi zimadziwika makamaka ndi mtundu wa driver wa doko la UTP wa chip PHY womwe wagwiritsidwa ntchito. Mitundu yamagalimoto idagawika: Voltage drive ndi drive yapano Lumikizani magetsi poyendetsa ndi magetsi; polumikiza capacitor pansi pamene mukuyendetsa galimoto pano. Chifukwa chake, njira yolumikizira mpopi wapakati imagwirizana kwambiri ndi mtundu wa PHTP yoyendetsa doko. Nthawi yomweyo, chonde onani ma datasheet ndi kapangidwe kake ka chip.

Chidziwitso: Ngati matepi apakati alumikizidwa molakwika, doko la netiweki likhala losakhazikika kwambiri kapena lotsekedwa.

Mu zida za Ethernet, pomwe chipangizo cha PHY chimalumikizidwa ndi RJ, chosinthira ma netiweki chimawonjezeredwa. Pampopi wapakati wamagetsi ena amtaneti ali pansi. Zina zimalumikizidwa ndi magetsi, ndipo mtengo wamagetsi umatha kukhala wosiyana, kuphatikiza 3.3V, 2.5V, ndi 1.8V. Ndiye momwe mungagwirizanitsire kachizindikiro pakati (PHY kumapeto) kwa thiransifoma?

B. Chifukwa chiyani amalumikizidwa ndi voliyumu ina ikalumikizidwa ndi magetsi?

Izi zimatsimikizidwanso ndi mulingo wa doko la UTP wofotokozedwera mu PHY chip data yomwe imagwiritsidwa ntchito. Mulingo uyenera kulumikizidwa ndi magetsi ofanana, ndiye kuti, ngati ndi 1.8v, adzakwezedwa mpaka 1.8v, ngati ali 3.3v, adzakwezedwa mpaka 3.3v.

Udindo wapampopi wapakati pa chosinthira cha LAN:

1. Kuchepetsa mode wamba magetsi ndi mode voteji pa chingwe ndi kupereka otsika Imedance kubwerera njira phokoso mode wamba pa mzere masiyanidwe;

2. Kwa ma transceivers ena, perekani DC kukondera kwamagetsi kapena magetsi.

Kuphatikizika kwa RJ wamba kwamachitidwe kungakhale kwabwino, ndipo magawo a parasitic nawonso samakhudzidwa; chifukwa chake, ngakhale mtengo uli wokwera kwambiri, umadziwikanso chifukwa chothandizirana kwambiri, malo ochepa, kuponderezana kofananira, magawo azirombo ndi zina zabwino. takulandirani.

Kodi udindo wa network transformer ndi chiyani? Kodi simungathe kutola?

Kulankhula mwamaganizidwe, imatha kugwira ntchito bwino popanda kulumikizana ndi chosinthira ma netiweki ndikugwirizana ndi RJ. Komabe, mtunda wotumizira udzakhala wochepa, ndipo udzakhudzidwanso ukalumikizidwa ndi doko lapa neti lina. Ndipo kusokonekera kwakunja kwa chip kulinso kwakukulu. Makina osinthira ma netiweki atalumikizidwa, amagwiritsidwa ntchito makamaka polumikizira mulingo wazizindikiro. 1. Limbikitsani chizindikirocho kuti chithandizireni kupitilira kwina; 2. Patulani chip kuchokera panja, pangani mphamvu yolimbana ndi zosokoneza, ndikuwonjezera chitetezo cha chip (monga kugunda kwa mphezi); 3. Mukalumikizidwa m'magulu osiyanasiyana (monga tchipisi tina ta PHY ndi 2.5V, ndipo tchipisi tina ta PHY ndi 3.3V), sizingakhudze zida za wina ndi mnzake.
Mwambiri, chosinthira ma netiweki chimakhala ndi ntchito yotumizira ma siginolo, kufanana kwa ma impedance, kukonza mawonekedwe amawu, kuponderezana kwa ma signal ndi kudzipatula kwamphamvu kwamagetsi.


Nthawi yamakalata: May-08-2021