Kodi hFE pa multimeter ndi chiyani
Zamkatimu
hFE ndi gawo loyezera kuti muwone phindu (kapena phindu) lomwe transistor angapereke. Mwa kuyankhula kwina, hFE ndi chiŵerengero cha pakati pa zolowetsa panopa ndi zotsatira zomwe zatuluka panopa, ndipo zingagwiritsidwe ntchito kudziwa momwe transistor ina ili yoyenera kwa dera kapena ntchito.
hFE pa multimeter ndi chinthu chomwe chimayesa kuwonjezeka kapena kuchepa kwa magetsi pakati pa mfundo ziwiri, mwa kuyankhula kwina, "mtengo wa hFE pa multimeter umasonyeza momwe transistor ingagwiritsire ntchito panopa isanayambe kutentha ndi kulephera." Mwachitsanzo: pamene zolowetsa panopa ndi volt imodzi pamalo A ndi amp imodzi ya zolowetsa panopa pa B, mphamvu yotulutsa idzakhala imodzi amp nthawi imodzi volt nthawi hFE. Ngati hFE ndi 10, zotulutsa zamakono zidzakhala ma amps khumi.
hFE tanthauzo
Kuti tiwononge equation iyi, titha kuwona kuti Ic ndiye "otolera" ndipo Ib ndiye "pano". Pamene mawu awiriwa agawidwa palimodzi, timapeza phindu lamakono la transistor, lomwe limatchedwa hFE.
Kodi hfe amatanthauza chiyani?
hFE imayimira "Hybrid Direct Emitter". Amadziwikanso kuti "forward beta" nthawi zina. Mawuwa amachokera ku mfundo yakuti chiŵerengero chomwe chimayimira ndi kuphatikiza kwa miyeso iwiri yosiyana: makamaka kukana kwamakono ndi emitter panopa kukana. Amachulukitsidwa palimodzi kuti apange zomwe timadziwa kuti hFE.
Kodi kuyesa kwa hFE ndi chiyani?
Kuyesa kumayesa kupindula (kapena kupindula) kwa transistor. Kupindula kumatanthauzidwa ngati chiŵerengero cha chizindikiro chotuluka ndi chizindikiro cholowetsa. Amadziwikanso kuti "beta" (β). Transistor imagwira ntchito ngati amplifier, kukulitsa mphamvu yapano kapena voteji pakutulutsa kwake molingana ndi zomwe amalowetsa, ndikusungabe kutulutsa kosalekeza. Kuti mudziwe ngati transistor ichita bwino pakugwiritsa ntchito, phindu lake liyenera kuyesedwa ndikuyerekeza ndi zomwe zimafunikira pakugwiritsa ntchito. (1)
Kodi hFE imawerengedwa bwanji?
hFE imawerengedwa poyerekeza maziko apano ndi otolera. Mafunde awiriwa amafaniziridwa pogwiritsa ntchito choyesera cha transistor chomwe chimakulolani kuyesa transistor yomwe ikufunsidwa. Transistor tester imagwira maziko apano pamlingo wokhazikika ndiyeno imayesa otolera omwe akuyenda modutsamo. Mukakhala ndi miyeso iwiri yonseyi, mutha kuwerengera hFE.
Komabe, pali chenjezo zingapo zofunika panjira iyi yoyesera ma transistors anu. Mwachitsanzo, muyenera kudziwa kuti ngati muyeza gulu la ma transistors palimodzi, amasokoneza kuwerenga kwa wina ndi mnzake. Izi zikutanthauza kuti ngati mukufuna kuyeza molondola ma hFE ma transistors anu, ndi bwino kuwayesa imodzi imodzi. Ngakhale kuti izi zingachedwetse ndondomeko yoyesera, zimatsimikiziranso kuti zotsatira zake ndi zolondola.
ayamikira
(1) Mtundu wa Beta - https://economictimes.indiatimes.com/definition/beta
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