Transistors yog cov khoom siv hluav taws xob semiconductor nrog tsawg kawg peb qhov tso tawm. Hauv qee qhov xwm txheej, lawv muaj peev xwm ua kom muaj zog, tsim kom muaj zog lossis hloov lub teeb liab. Muaj ntau ntau qhov sib txawv ntawm cov khoom siv no, thiab ntawm lawv yog pnp transistor.
cais cov transistors los ntawm cov khoom siv semiconductor. Lawv tuaj hauv silicon, germanium, thiab lwm yam.
Yog hais tias ib lub transistor muaj peb cheeb tsam, ob ntawm lawv muaj qhov conduction, nws yog hu ua "forward conducting transistor", los yog "pnp junction transistor". Ib qho khoom siv nyob rau hauv ob cheeb tsam yog hluav taws xob conductive hu ua reverse conducting transistor, los yog npn junction. Ob lub transistors ua haujlwm tib yam, thiab qhov sib txawv tsuas yog nyob rau hauv polarity.
pnp transistor siv nyob qhov twg?
Nyob ntawm tus yam ntxwv ntawm kev hloov pauv dab tsi, nws tuaj yeem siv rau ntau lub hom phiaj. Raws li twb tau hais lawm, lub transistor yog siv los tsim, hloov thiab nthuav tawm cov teeb liab hluav taws xob. Vim lub fact tias cov input voltage los yog tam sim nohloov, lub input circuit tam sim no yog tswj. Cov kev hloov me me ntawm qhov ntsuas ntawm qhov kev tawm tswv yim ua rau muaj kev hloov pauv ntau dua ntawm qhov tam sim no thiab qhov hluav taws xob ntawm qhov tso zis. Cov cuab yeej tau txais txiaj ntsig no yog siv hauv kev siv tshuab analog (xov tooj cua, analog TV, kev sib txuas lus, thiab lwm yam).
Nyob rau hauv peb lub sij hawm, ib tug bipolar pnp transistor yog siv rau analog technology. Tab sis lwm qhov, kev lag luam tseem ceeb heev - cov thev naus laus zis thev naus laus zis - tau yuav luag tso tseg nws thiab siv cov thev naus laus zis nkaus xwb. Lub bipolar pnp transistor tau tshwm sim sai dua li qhov cuam tshuam ntawm thaj chaw, yog li nws feem ntau hu ua ib qho transistor.
Kev ua tau zoo thiab qhov tsis muaj ntawm transistors
Transistors yog tsim los ntawm cov yas thiab hlau. Muab cov hom phiaj sib txawv ntawm cov transistors, cov khoom siv no raug xaiv raws li qee qhov kev txwv. Piv txwv li, yog tias koj xav tau ib lub transistor los ua kom nrov nrov zaus, nws yuav tsum muaj lub teeb liab amplification zaus. Thiab yog hais tias lub pnp transistor siv nyob rau hauv ib tug tam sim no regulator, nws yuav tsum muaj ib tug siab collector khiav hauj lwm tam sim no.
Cov ntawv nyeem muaj cov yam ntxwv tseem ceeb ntawm transistors:
- Ik - ua haujlwm (tsawg kawg tso cai) cov khoom tam sim no;
- h21e - nce qhov khoom;
- Fgr - qhov nce siab tshaj plaws;
- Pk yog tus sau lub zog dissipation.
Phototransistors
A phototransistor yog ib qho khoom siv uas nkag siab rau lub teeb flux uas irradiates nws. Nyob rau hauv cov ntaub ntawv hermetically kaw ntawm xws li ib tug transistorlub qhov rais yog tsim, piv txwv li, los ntawm pob tshab yas los yog iav. Cov hluav taws xob los ntawm nws nkag mus rau thaj tsam ntawm lub hauv paus ntawm phototransistor. Yog tias lub hauv paus yog irradiated, ces cov cab kuj raug tsim tawm. Lub phototransistor yuav qhib thaum tus nqi thauj khoom nkag mus rau hauv cov khoom sib txuas, thiab qhov ntau lub hauv paus yog illuminated, qhov tseem ceeb ntawm cov khoom tam sim no yuav dhau los.
Cov khoom siv hluav taws xob niaj hnub tsis tuaj yeem xav txog yam tsis muaj transistors. Yuav luag tsis muaj cov cuab yeej loj tuaj yeem ua yam tsis muaj lawv. Los ntawm xyoo ntawm kev thov thiab kev txhim kho, transistors tau hloov pauv loj, tab sis lub hauv paus ntsiab lus ntawm lawv txoj haujlwm tseem zoo ib yam.
