Vim tias lub tshuab hluav taws xob bipolar yog ib qho khoom siv peb lub davhlau ya nyob twg, muaj peb txoj hauv kev los suav nrog hauv hluav taws xob hluav taws xob nrog ib qho kev tso zis ntau rau kev tawm tswv yim thiab cov zis:
- common puag (CB) - high voltage hloov pauv piv;
- nrog ib qho emitter (CE) - amplified teeb liab nyob rau hauv ob qho tib si tam sim no thiab voltage;
- common-collector (OK) - amplified tam sim no teeb liab.
Nyob rau hauv txhua ntawm peb ntau yam ntawm cov transistor switching circuits, nws reacts txawv rau lub input teeb liab, vim hais tias cov yam ntxwv zoo li qub ntawm nws active yam nyob ntawm seb cov kev daws teeb meem.
Lub hauv paus Circuit Court yog ib qho ntawm peb qhov kev hloov pauv ntawm bipolar transistor tig-on configurations. Nws feem ntau yog siv los ua ib qho tam sim no tsis muaj zog lossis voltage amplifier. Xws li transistor switching circuits txawv nyob rau hauv hais tias lub emitter ntawm no ua raws li ib tug input Circuit Court, tso zis teeb liab yog muab los ntawm lub collector, thiab lub hauv paus yog "grounded" mus rau ib tug ntau yam hlau. FET switching circuits nyob rau hauv lub rooj vag amplifiers muaj ib tug zoo xws li configuration.
| Parameter | Expression |
| Tam sim no nce |
I
Ik/Iin=Ik/I e=α[α<1] |
| Ib. resistance |
Rin=Uin/Iin=U be/Ie |
Cov kev hloov pauv ntawm OB transistors yog tus yam ntxwv ntawm qhov ntsuas kub thiab qhov zaus, uas ua kom muaj kev vam khom me me ntawm lawv cov kev txwv (voltage, tam sim no, input resistance) ntawm qhov kub thiab txias ntawm qhov chaw ua haujlwm. Qhov tsis zoo ntawm Circuit Court muaj xws li ib qho me me RВХthiab qhov tsis muaj qhov nce tam sim no.
Cov kab hluav taws xob sib xyaw ua ke muab qhov nce siab heev thiab ua rau lub teeb liab inverted ntawm cov zis, uas tuaj yeem muaj qhov sib kis loj heev. Qhov nce hauv lub voj voog no yog nyob ntawm qhov kub ntawm qhov tsis ncaj ncees tam sim no, yog li qhov kev nce siab tiag tiag yog qhov tsis tuaj yeem kwv yees. Cov transistor switching circuits muab siab R IN, tam sim no thiab voltage nce, input teeb liab inversion, yooj yim hloov. Qhov tsis zoo suav nrog cov teeb meem cuam tshuam nrog overamping - qhov muaj peev xwm ntawm cov lus pom zoo tshwm sim, qhov tshwm sim ntawm kev cuam tshuam ntawm cov teeb liab me me vim qhov kev tawm tswv yim qis qis.
| Parameter | Expression |
| Fact. nce tam sim no |
I
Iout/Iin=Ik/I b=Ik/(Ie-Ik)=α/(1 -α)=β[β>>1] |
| Ib. resistance |
Rin=Uin / Iin=U be/Ib |
Cov khoom sib sau ua ke (tseem hu ua tus emitter follower hauv electronics) yog ib qho ntawm peb hom transistor circuits. Nyob rau hauv nws, lub input teeb liab yog pub los ntawm lub hauv paus Circuit Court, thiab cov zis tawm teeb liab yog muab los ntawm lub resistor nyob rau hauv lub emitter Circuit Court ntawm lub transistor. Qhov no amplifying theem configuration feem ntau yog siv raws li ib tug voltage tsis. Ntawm no, lub hauv paus ntawm lub transistor ua raws li cov khoom siv hluav taws xob, lub emitter yog cov zis, thiab cov khoom siv hauv av ua haujlwm raws li qhov sib txawv, yog li lub npe ntawm lub voj voog. Analogues tuaj yeem hloov circuits rau thaj tsam cuam tshuam transistors nrog cov dej ntws. Qhov kom zoo dua ntawm txoj kev no yog ib qho kev tawm tswv yim zoo heev ntawm cov theem amplifying thiab cov zis impedance kuj tsawg.
| Parameter | Expression |
| Fact. nce tam sim no |
Iout/Iin=Ie/Ib =Ie/(Ie-Ik)=1/(1-α)=β [β>>1] |
| Coob. voltage nce |
Uout /Uin=URe/(U be+URe) < 1 |
| Ib. resistance |
Rin=Uin/Iin=U be/Ie |
Txhua peb yam kev hloov pauv hloov hluav taws xob tau dav siv hauv circuitry, nyob ntawm lub hom phiaj ntawm cov khoom siv hluav taws xob thiab cov xwm txheej rau nws siv.
