Ntawm technology, Electronics
Yuav ua li cas yog cov transistors ntawm lub Circuit Court
Txij li thaum lub bipolar transistor yog ib tug classic peb-point, nws muaj peb tau txoj kev ntawm xws li nws nyob rau hauv ib tug hluav taws xob Circuit Court nrog ib qho inlet thiab qhov hluav taws xob davhlau ya nyob twg:
- ib qho puag (OB) - high voltage kis tau tus mob coefficient;
- ib qho-emitter (MA) - ib qho amplified teeb liab raws li ib tug tam sim no thiab voltage;
- ntau-collector (OC) - amplified tam sim no teeb liab.
Scheme ntau paus yog ib tug ntawm peb raug configurations incorporating bipolar transistors. Feem ntau nws yog siv raws li ib tug tam sim no los yog voltage tsis amplifier. Tej transistors ntawm lub Circuit Court yog yus nyob rau hauv uas lub emitter no ua raws li ib lub tswv yim Circuit Court, ib tug tso zis lub teeb liab los ntawm lub collector thiab puag "sawv ruaj nrees" mus rau ib tug ntau hlau. Ib tug zoo xws li cov configuration yog FET switching circuits nyob rau hauv ntau lub rooj vag amplifiers.
parameter | qhia |
Koeff.usileniya tam sim no | Kuv k / kuv nyob rau hauv = kuv k / kuv e = α [α < 1] |
Bx. kuj | R nyob rau hauv = U nyob rau hauv / kuv nyob rau hauv = U yuav / Ie |
Scheme switching transistors RAU txawv ruaj khov kub thiab zaus thaj chaw uas muab ib tug me me dependence ntawm cov tsis (voltage nce, tam sim no, cov tswv yim impedance) los ntawm qhov kub ntawm lub chaw ua hauj lwm tej yam kev mob. Qhov tsis zoo muaj xws li ib tug me me Circuit Court R HAUV thiab lub tsis tuaj kawm ntawv tam sim no amplification.
Scheme ntau emitter muab ib tug heev nce thiab ua ib tug tso zis inverted lub teeb liab, uas tej zaum yuav muaj ib tug ncaj loj variation. kis tau tus mob coefficient nyob rau hauv no cov tswvyim kev lom zem ntau nyob rau hauv lub kub ntawm lub kev tsis ncaj ncees tam sim no, uas lub sij nce yog dog dig unpredictable. Cov transistors muab switching Circuit Court bx R, lub coefficient rau tam sim no thiab voltage amplification, tswv yim teeb liab inverting, yooj yim xam. Qhov tsis zoo yog cov teeb meem hais txog lub overdrive - tau tshwm sim zoo tswv yim distortion tshwm sim rau cov me Pib ntsais koj teeb vim tsis muaj tswv yim dynamic ntau yam.
parameter | qhia |
Yuav muaj tseeb. tam sim no amplification | Kuv tawm / kuv nyob rau hauv = kuv k / kuv b = kuv k / (Kuv e -Kuv k) = α / ( 1-α) = β [β >> 1] |
Bx. kuj | R nyob rau hauv = U nyob rau hauv / kuv nyob rau hauv = U yuav / kuv b |
Scheme ntau collector (kuj hu nyob rau hauv electronics li ib tug emitter follower) yog ib tug ntawm peb cov hom ntawm cov transistors ntawm lub Circuit Court. Nws lub tswv yim teeb liab nkag ntawm lub puag saw, thiab cov qhov tso zis yog muab tshem tawm los ntawm lub resistor nyob rau hauv lub emitter Circuit Court ntawm lub transistor. Xws li ib tug configuration ntawm cov amplifier theem yog feem ntau yog siv raws li ib tug voltage tsis. Ntawm no yog lub hauv paus ntawm lub transistor ua hauj lwm pab raws li lub tswv yim Circuit Court, uas nws emitter yog tso zis, thiab cov collector yog grounded qho, li no lub npe tswvyim. Analogs yuav pab raws li Circuit Court switching FETs nrog ib qho hluav taws xob. Qhov kom zoo dua ntawm no txoj kev yog haum siab cov tswv yim impedance amplifier theem thiab ib tug kuj tsis tshua muaj cov zis.
parameter | qhia |
Yuav muaj tseeb. tam sim no amplification | Kuv tawm / kuv nyob rau hauv = kuv e / kuv b = kuv e / (Kuv e -Kuv k) = 1 / (1-α) = β [β >> 1] |
Koff. voltage nce | U tawm / U nyob rau hauv = U Re / (U yuav + U Re) < 1 |
Bx. kuj | R nyob rau hauv = U nyob rau hauv / kuv nyob rau hauv = U yuav / Ie |
Tag nrho peb raug Circuit Court switching transistors yog lug siv nyob rau hauv lub circuitry, nyob ntawm seb cov lo lus uas ntawm lub tshuab hluav taws xob ntaus ntawv thiab ib puag ncig ntawm nws daim ntawv thov.
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