Yuav ua li cas mus xyuas cov transistor

Nyob rau hauv lub ntiaj teb no niaj hnub siv tshuab tsis tau tsis muaj transistors. Lawv tuaj nyob rau hauv ib tug ntau yam ntawm hluav taws xob, lawv muaj peev xwm yuav nrhiav tau nyob rau hauv cov xov tooj, radios, computers thiab tsheb. Tej zaum kuj muaj yog ib tug yuav tsum tau rau ib tug pov thawj ntawm lawv cov kev kawm, thiab ces pab tau paub yuav ua li cas mus saib hauv lub transistor thiab hais tias qhov no yuav tsum tau. Cov khoom nyob rau hauv qhov tsab xov xwm tseem ceeb rau qhov teeb meem.

Transistors thiab hom

Qhov no ntaus ntawv yog ib qho hluav taws xob ntaus ntawv, uas yog siv nyob rau hauv thiaj li yuav txhim khu electroschemes thawj lub teeb liab. Nws yog tsim los ntawm semiconductor cov ntaub ntawv. Muaj 2 hom ntawm transistors: teb thiab bipolar, yog tsis yog tswj voltage thiab tam sim no. Nyob rau hauv tas li ntawd, lawv yuav ua tau nyias thiab muaj hwj chim, tsis tshua muaj thiab siab zaus. Lawv txawv nyob rau hauv loj thiab tsim ntawm vaj tse.

Feem ntau thaum xa mus rau bipolar transistors txhais li cas lawv ntau ntau yam, yog ua los ntawm germanium los yog pob zeb ntais. Lawv hu ua bipolar vim hais tias lawv ua hauj lwm nrog electrons (them nyiaj nqa) thiab qhov. Ib tug ntawm cov cheeb tsam ntawm lub transistor nyob rau ntawm ntug, hu ua lub emitter, intermediate - puag, thiab lwm yam, kuj muaj nyob rau ntawm ntug - collector. Txij li thaum lub electrode 3 tsim pn hloov 2: collector pov tseg ntawm lub collector thiab puag, thiab ib tug emitter uas yog kev cob cog rua ntawm lub emitter thiab puag. Lub transistor tej zaum yuav lub "on" lub xeev thiab "off", thiab cov kev hloov ntawm lawv yog nqa tawm los ntawm txoj kev hluav taws xob Pib ntsais koj teeb.

Lub hom phiaj tseem ceeb transistors - lub cim, amplification thiab hloov dua siab tshiab ntawm hluav taws xob oscillations. Tab sis, raws li tej kev ntaus ntawv, cov transistor yuav tsis. Koj yuav tsum paub yuav ua li cas mus saib hauv lub transistor rau cov yuav tsum tau siv tau. Rau lub hom phiaj no multimeters.

Xyuas transistor tester

Multimeter (aka Tester) - yog ib tug tshwj xeeb neej coj ntsuas, los ntawm cov uas ua hluav taws xob ua hauj lwm. Nws combines ob peb zog: raws li ib tug tsawg kawg nkaus combines ammeter, voltmeter, ohmmeter. Muaj ob analog thiab cov pab kiag li lawm, lub teeb, portable thiab nyob ruaj ruaj, uas combines ib tug ntau ntawm lub sij hawm.

Ntsuas - ib tug ntaus ntawv uas qhia yuav ua li cas mus saib hauv lub transistor thiab ua kom nws ntshiab. Tester pub dial nrog ib tug tsawg kuj ntsuas Circuit Court, lub tswb suab, suab los sis lub teeb.

Ua ntej tshuaj ntsuam cov txheej txheem, yuav ua li cas mus saib hauv lub transistor tester, nws yog ib qho tseem ceeb kom paub hais tias cov cuab yeej muab faib ua 2 hom raws li cov kev kho ntawm khaubncaws sab nraud povtseg nrog txawv conductivity. Yog li muaj semiconductors nrog rau hauv conductivity (pnp), thiab p-hom semiconductors (p-).

Yuav kom ntsuam xyuas cov kuj ntawm ib tug ncaj qha kev hloov mus rau hauv lub hauv paus mus cuag cov "rho tawm" lub 'meter' thiab mus rau lub emitter thiab cov collector nyob rau hauv lem txuas "plus". hloov rau txoj hauj lwm ntawm lub "rho tawm" thiab "plus" nyob rau hauv rov qab kuj ntsuam. Yuav kom ntsuas tus kuj hloov pnp rov hais dua cov tib txoj kev, tab sis preliminarily hloov polarity. Thaum lub sij hawm kev hloov daim tshev ntawm lub hauv paus mus rau lub emitter thiab cov collector yuav tsum prozvanivatsya xwb 1 sab.

Txij li thaum lub multimeter mus xyuas cov transistor yuav ua tau, tab sis nws tsis muab ib tug meej guarantee ntawm serviceability ntawm tus dais, rau ntau dua tseeb yuav tsum ua nws cov kev soj ntsuam nyob rau hauv ib tug active hom. Nyob rau hauv cov ntaub ntawv no, qhov tshwm sim yuav muaj ntau txhim khu kev qha.

Thiab tsis tau: npaum li cas mus xyuas cov transistor thiab tso siab tau nyob rau hauv cov kev tshwm sim? Nyob rau hauv bipolar pab kiag li lawm rau kom yooj yim, koj yuav nrhiav tau rau lub diode counterparts txhua yam ntawm nws zaus, tom qab xyuas lawv serviceability. Muaj haib transistors uas muaj xws li ntawm cov emitter thiab cov collector ntawm lub damper lub cev diode, thiab ntawm lub hauv paus thiab emitter - ib tug tiv thaiv resistor. Thaum lub 'meter' thaum twg polarity no transistor yuav tus kuj los ntawm peb caug rau tsib caug ohms, thiab prozvanivatsya ntawm emitter thiab collector nws yuav raws li ib tug diode. Qhov no ua tim khawv rau lub serviceability ntawm qhov chaw.