Yuav ua li cas txuas lub transistor rau hauv amplifier?

1, Cov ntsiab lus tseem ceeb ntawm amplifiers
Lub amplifier yog ib qho hluav taws xob hluav taws xob uas nws lub luag haujlwm tseem ceeb yog txhawm rau txhawm rau ua kom lub amplitude (voltage lossis tam sim no) ntawm cov teeb liab tawm tswv yim rau qee qhov kev faib ua feem thaum tswj lub waveform ntawm lub teeb liab tsis hloov. Nyob rau hauv analog circuits, transistors yog ib qho ntawm feem ntau siv amplification Cheebtsam, uas amplify signals los ntawm kev tswj cov ndlwg ntawm tam sim no.
2, Cov yam ntxwv ntawm lub transistor amplifier
Ib qho yooj yim transistor amplifier muaj cov hauv qab no:
Transistor: Raws li cov ntsiab lus tseem ceeb ntawm amplification, nws cov yam ntxwv txiav txim siab qhov ua tau zoo ntawm lub tshuab hluav taws xob.
DC bias Circuit Court: muab qhov chaw ua haujlwm ruaj khov DC rau lub transistor, kom ntseeg tau tias nws nyob rau hauv ib qho kev ua haujlwm tsim nyog thaum lub sijhawm ua haujlwm amplification.
Input Circuit Court: Qhia qhov teeb liab yuav tsum tau amplified rau hauv lub amplifier.
Cov zis hluav taws xob: Tshaj tawm cov teeb liab amplified rau cov khoom siv tom ntej los yog cov khoom siv.
Load: Ib qho khoom siv lossis cov cuab yeej txuas nrog rau qhov tso zis hluav taws xob uas tau txais cov teeb liab amplified.
3, Kev sib txuas cov kauj ruam ntawm transistor amplifier
1. Xaiv cov transistor tsim nyog
Xaiv cov qauv transistor tsim nyog raws li qhov yuav tsum tau ua ntawm amplifier, xws li nce, zaus teb, thiab lwm yam NPN transistors yog dav siv hauv amplifier circuits vim lawv muaj zog tswj tam sim no muaj peev xwm thiab tsis tshua muaj suab nrov.
2. Tsim lub DC bias Circuit Court
Lub hom phiaj ntawm DC bias Circuit Court yog muab qhov chaw ua haujlwm zoo li qub (xws li lub hauv paus tam sim no thiab cov khoom siv hluav taws xob) rau lub transistor. Qhov no feem ntau yog ua tiav los ntawm cov kab hluav taws xob resistor voltage divider network lossis qhov chaw tam sim no. Thaum tsim, nws yog ib qho tsim nyog yuav tau xav txog qhov kev tawm tswv yim thiab tso tawm cov yam ntxwv nkhaus ntawm lub transistor kom ntseeg tau tias nws nyob hauv cheeb tsam linear thaum lub sij hawm amplification txheej txheem.
3. Txuas lub input circuit
Txuas lub teeb liab mus rau lub hauv paus ntawm lub transistor los ntawm kev sib txuas tsim nyog, xws li kev sib txuas capacitive, transformer coupling, los yog kev sib txuas ncaj qha. Kev xaiv ntawm txoj kev sib txuas yog nyob ntawm qhov zaus ntawm lub teeb liab thiab cov kev cai tshwj xeeb ntawm lub voj voog.
4. Tsim tawm Circuit Court
Kev tsim cov khoom siv hluav taws xob yuav tsum xav txog qhov sib txuam ntawm cov khoom siv hluav taws xob thiab hluav taws xob xa hluav taws xob. Feem ntau, lub collector txuas nrog lub hwj chim mov voltage lossis hauv av (nyob ntawm seb hom Circuit Court) los ntawm kev thauj khoom resistor los muab cov teeb liab tawm suab.
5. Txuas lub nra
Txuas lub load mus rau qhov tso zis hluav taws xob thiab tau txais cov teeb liab amplified. Lub nra tuaj yeem yog tus hais lus, kav hlau txais xov, lwm lub tshuab hluav taws xob, lossis lwm yam khoom siv uas yuav tsum tau tsav.
4, Lub hauv paus ntsiab lus ua haujlwm ntawm transistor amplifier
Nyob rau hauv lub transistor amplifier, thaum ib tug input teeb liab yog siv rau lub hauv paus ntawm lub transistor, nws ua rau ib tug me me hloov nyob rau hauv lub hauv paus tam sim no. Vim qhov tam sim no amplification nyhuv ntawm transistor, qhov kev hloov me me ntawm lub hauv paus tam sim no yuav ua rau muaj kev hloov loj hauv cov khoom siv tam sim no. Kev hloov pauv hauv cov khoom siv tam sim no yog tom qab hloov pauv mus rau qhov hloov pauv hloov pauv los ntawm kev thauj khoom tsis kam, yog li ua tiav cov teeb liab amplification.
Nws yuav tsum tau muab sau tseg hais tias lub amplification nyhuv ntawm transistors yog tsis unlimited. Thaum lub teeb liab input loj dhau lawm, lub transistor tuaj yeem nkag mus rau hauv cheeb tsam saturation lossis cutoff, ua rau distortion ntawm cov zis teeb liab. Yog li ntawd, thaum tsim ib lub amplifier, nws yog ib qho tsim nyog los teeb tsa qhov chaw ua haujlwm zoo li qub thiab cov teeb liab tawm tswv yim tsim nyog raws li tus yam ntxwv nkhaus ntawm lub transistor thiab cov kev cai hauv Circuit Court.
5, Kev ceev faj hauv kev siv tswv yim
Kev ruaj ntseg: xyuas kom meej tias lub amplifier tuaj yeem tswj tau lub xeev ua haujlwm ruaj khov nyob rau hauv ntau yam kev ua haujlwm, zam kev ua haujlwm tsis zoo lossis tsis ua haujlwm los ntawm yam xws li kub thiab hluav taws xob hloov hluav taws xob.
Suab nrov: Sim txo lub suab nrov ntawm lub amplifier kom ntau li ntau tau los txhim kho qhov zoo ntawm lub teeb liab. Qhov no tuaj yeem ua tiav los ntawm kev xaiv cov suab nrov qis transistors, optimizing circuit layout, thiab grounding method.
Matching: Ua kom zoo sib xws ntawm cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab kev thauj khoom los txhim kho lub zog xa hluav taws xob thiab cov teeb liab zoo.
Kev Tiv Thaiv: Teeb tsa kev tiv thaiv tsim nyog (xws li kev tiv thaiv overcurrent, tiv thaiv overvoltage, thiab lwm yam) hauv Circuit Court tiv thaiv kev puas tsuaj ntawm transistor vim overload.
Kev debugging: Tom qab lub amplifier tsim, cov ncauj lus kom ntxaws debugging thiab kuaj yuav tsum tau xyuas kom meej tias nws cov kev ua tau raws li qhov yuav tsum tau tsim. Thaum lub sij hawm debugging txheej txheem, nws yuav tsim nyog los kho qhov tsis xws li DC bias Circuit Court thiab load tsis kam rau optimize qhov kev ua tau zoo ntawm lub amplifier.
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