Volt-ampere yam ntxwv ntawm cov khoom siv hluav taws xob

Volt-ampere yam ntxwv ntawm cov khoom siv hluav taws xob
Volt-ampere yam ntxwv ntawm cov khoom siv hluav taws xob
Anonim

Nws yuav tsim nyog pib zaj dab neeg nrog Edison. Tus txiv neej inquisitive ntawm kev tshawb fawb tau sim nrog nws lub teeb lub teeb, sim kom ncav cuag qhov siab tshiab hauv hluav taws xob teeb pom kev zoo, thiab yuam kev tsim lub teeb diode. Nyob rau hauv lub tshuab nqus tsev, cov electrons tawm ntawm lub cathode thiab tau nqa mus rau qhov thib ob electrode, sib cais los ntawm qhov chaw. Me ntsis tau paub txog kev kho tam sim no thaum lub sijhawm ntawd, tab sis qhov kev tsim kho patented nws thiaj li pom nws daim ntawv thov. Nws yog thaum ntawd xav tau tus yam ntxwv tam sim no-voltage. Tab sis ua ntej ua ntej.

Qhov tam sim no-voltage yam ntxwv ntawm cov nyhuv photoelectric yog vim yug ntawm Thomas Edison
Qhov tam sim no-voltage yam ntxwv ntawm cov nyhuv photoelectric yog vim yug ntawm Thomas Edison

Volt-ampere yam ntxwv ntawm txhua yam khoom siv hluav taws xob - lub tshuab nqus tsev, nrog rau cov khoom siv hluav taws xob - pab kom nkag siab tias lub cuab yeej yuav coj li cas thaum suav nrog hauv hluav taws xob hluav taws xob. Qhov tseeb, qhov no yog kev vam khom ntawm cov zis tam sim no ntawm qhov hluav taws xob siv rau lub cuab yeej. Lub diode precursor tsim los ntawm Edison yog tsim los txiav tawm qhov tsis zoo voltage qhov tseem ceeb, txawm hais tias, nruj me ntsis hais lus, txhua yam yuav nyob ntawm qhov kev taw qhia cov cuab yeej txuas nrog lub voj voog, tab sis ntau ntxiv rau qee lub sijhawm, yog li tsis txhob dhuav tus nyeem ntawv nrog. yam tsis tsim nyog.

Yog li, tam sim no-voltage yam ntxwv ntawm ib qho zoo tagnrho diode yog ib ceg zoo ntawm kev ua lej parabola, paub rau feem ntau los ntawm tsev kawm ntawv cov lus qhia. Tam sim no los ntawm xws li ib tug ntaus ntawv tsuas yog ntws nyob rau hauv ib qho kev taw qhia. Lawm, qhov zoo tagnrho yog txawv ntawm lub neej tiag tiag, thiab nyob rau hauv kev xyaum, nrog rau qhov tsis zoo voltage qhov tseem ceeb, tseem muaj ib tug parasitic tam sim no hu ua thim rov qab (xws li). Nws yog qhov tsawg dua qhov muaj txiaj ntsig tam sim no, hu ua ncaj qha, tab sis txawm li cas los xij, ib tus yuav tsum tsis txhob hnov qab txog qhov tsis zoo ntawm cov khoom siv tiag tiag.

Volt-ampere yam ntxwv ntawm lub diode
Volt-ampere yam ntxwv ntawm lub diode

Lub tshuab nqus tsev triode txawv ntawm nws cov tub ntxhais hluas nrog ob lub electrodes los ntawm kev muaj cov kab sib chaws uas thaiv qhov nruab nrab ntu ntawm lub tshuab nqus tsev vacuum. Lub cathode nrog cov txheej tshwj xeeb, uas ua kom yooj yim rau kev sib cais ntawm cov hluav taws xob los ntawm nws qhov chaw, tau txais kev pab raws li qhov chaw ntawm cov khoom siv hluav taws xob, uas tau txais los ntawm anode. Cov dej ntws tau tswj los ntawm qhov hluav taws xob siv rau hauv kab sib chaws. Cov yam ntxwv tam sim no-voltage ntawm lub tshuab nqus tsev triode teeb zoo ib yam li lub diode, tab sis nrog ib qho kev qhia loj. Nyob ntawm qhov voltage ntawm lub hauv paus, lub parabola coefficient hloov pauv, thiab ib tsev neeg ntawm cov kab uas zoo sib xws tau txais.

Tsis zoo li lub diode, triodes ua haujlwm nrog qhov zoo voltages ntawm cathode thiab anode. Qhov kev ua haujlwm yuav tsum tau ua tiav los ntawm kev tswj cov kab hluav taws xob hluav taws xob. Thiab thaum kawg, ib qho kev qhia meej kawg yuav tsum tau ua. Txij li thaum lub cathode muaj lub peev xwm tsis tu ncua rau emit electrons, txhua tus yam ntxwv muaj thaj tsam saturation, qhov uas qhov nce ntxiv ntawm qhov hluav taws xob tsis ua rau muaj kev nce ntxiv hauvtso zis tam sim no.

Volt-ampere yam ntxwv ntawm transistor nyob ntawm lub hauv paus voltage
Volt-ampere yam ntxwv ntawm transistor nyob ntawm lub hauv paus voltage

Txawm hais tias muaj qhov sib txawv thiab cov ntsiab cai ntawm kev ua haujlwm, qhov tam sim no-voltage yam ntxwv ntawm transistor tsis txawv ntawm triode, tsuas yog qhov steepness ntawm parabola kuj loj. Tias yog vim li cas cov raj xaim hluav taws xob, raws li kev xav paub tab, feem ntau raug xa mus rau ib lub hauv paus semiconductor. Qhov kev txiav txim ntawm lub cev muaj nuj nqis yog txawv, transistors siv incomparably qis mov voltages. Tsis tas li ntawd, cov khoom siv semiconductor tuaj yeem tsav los ntawm ob qho tib si zoo thiab qhov tsis zoo, muab cov neeg tsim kev ywj pheej ntau dua thaum tsim cov circuits.

Txhawm rau ua kom txaus siab rau qhov kev thov rau kev hloov pauv cov kev daws teeb meem, cov khoom siv nrog cov nyhuv photoelectric kuj tau tsim. Muaj tseeb, yog tias lub teeb siv nws cov khoom siv sab nraud, tom qab ntawd txhim kho lub hauv paus, rau cov laj thawj pom tseeb, ua haujlwm ntawm lub hauv paus ntawm cov nyhuv photoelectric sab hauv. Cov yam ntxwv tam sim no-voltage ntawm cov nyhuv photoelectric txawv nyob rau hauv uas tus nqi ntawm cov zis tam sim no hloov, nyob ntawm seb lub illumination. Qhov siab dua qhov siv ntawm lub teeb flux, qhov ntau dua qhov tso zis tam sim no. Qhov no yog li cas phototransistors ua haujlwm, thiab photodiodes siv cov ceg rov qab tam sim no. Qhov no pab tsim cov khoom siv uas ntes photons thiab tswj los ntawm cov teeb pom kev sab nraud.

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