Ua Darlington Pair Siv Ob Npn BJTs: 9 Kauj Ruam

2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:27

Cov lus qhia no, yuav yog txhua yam txog Darlington Pair thiab nws yog daim ntawv thov. Kuv yuav dhau los ntawm kev nthuav dav raws li kev tsim kho raws li ob qho NPN thiab PNP hom (yuav los sai sai! - nyob twj ywm mloog). Yog li, cia pib.

Kauj Ruam 1: Li Li Me Me Ntawm Intro: Darlington Pair

Darlington khub; yog lub npe muab rau txheej txheej ntawm cov transistors uas yog tib yam, hais NPN lossis PNP. Qhov kev teeb tsa no yeej nthuav dav cov tswv yim ntawm 'lub hauv paus ntawm kev teeb tsa' thiab qhov ntawd ua rau muaj qhov loj heev tam sim no hauv cov khoom siv hluav taws xob tso tawm. Qhov no yog cov khoom muaj txiaj ntsig zoo, raws li qhov ua kom nrov nrov lossis tam sim no nce ntawm kev teeb tsa yog loj heev. Nws tau muab raws li hauv qab no β (net) = β1. +2 + β1 + β2 qhov twg, β1 yog qhov nce tam sim no ntawm ib qho ntawm cov transistors. β2 yog qhov nce ntawm lwm cov transistor. β (net) yog qhov nce tam sim no ntawm kev teeb tsa tag nrho. β yog qhov piv ntawm colector tam sim no rau hauv paus tam sim no. β = Ic/IborIc = β. Ib qhov twg, 'Ic' yog tus neeg khaws khoom tam sim no thiab 'Ib' yog lub hauv paus tam sim no.it txhais tau tias rau lub hauv paus me me tam sim no tus neeg khaws khoom tam sim no yuav yog β npaug ntawm lub hauv paus tam sim no. tab sis rau darlington khub β yog β (net) uas muaj txiaj ntsig zoo (saib cov kauj ruam 3) yog li lub hauv paus me me tam sim no ua rau cov neeg sau khoom loj heev tam sim no. Tsis txhob dhuav. Tam sim no cia saib nws ua haujlwm.

Kauj ruam 2: Khoom siv;

1 - Breadboard2 - NPN transistors, 547B (x2) 3 - 10kΩ resistor4 - 100Ω resistor5 - LED (kom pom nws muaj txiaj ntsig) 6 - Lub Hwj Huam (5V lossis 3V yuav txaus / koj tuaj yeem siv tes ua ke).7 - don ' t hnov qab cov xov hluav taws xob jumper8 - Multimeter nrog ntsuas transistor (hFE)

Kauj Ruam 3: Sib dhos: Tub Ntxhais; Darlington Sib

Cia peb pib los ntawm kev ua khub darlington. Put ib qho ntawm cov transistors hauv lub khob cij. Tam sim no tso lub transistor thib ob rau hauv lub khob cij, xws li cov khoom sib txuas ntawm ob lub transistors tau txuas nrog. thiab lub davhlau ya nyob twg emmiter ntawm ob lub transistor txuas nrog lub hauv paus ntawm thawj transistor. Tsis tas li, lub hauv paus ntawm transistor thib ob tsis txuas nrog ib yam dab tsi thiab tus emmiter ntawm thawj transistor tsis txuas nrog txhua yam. Qhov ntawd yog khub darlington. Qhov tseem ceeb ntawm peb qhov kev sib tw ntawm no. Fact - 547B transistors muaj β ntawm ib puag ncig 350 ntau dua lossis tsawg dua. uas txhais tau tias β (net) yuav yog = 350. 350 + 350 + 350 = 123, 200 uas txhais tau tias rau lub hauv paus tam sim no ntawm 1μA tus neeg sau yuav yog 123, 200 zaug 1μA uas yog li 123mA ntau dua lossis tsawg dua (nws nyob ntawm qhov ua tau zoo). Yog li koj tuaj yeem pom, ntau npaum li cas yog qhov ua kom nrov nrov.

Kauj Ruam 4: Kev Thauj Khoom: Cia Mus Nrog LED rau Tam Sim No

Tam sim no cia peb txuas mus txuas rau LED. txuas lub LED ntawm tus sau sab ntawm darlington teeb. Yuav kom muaj kev nyab xeeb txuas rau 100Ω resistor hauv koob nrog LED, nws yuav ua kom LED nyab xeeb los ntawm kev nce nrawm hauv qhov hluav taws xob. thiab txuas rau 100Ω resistor rau anode ntawm LED. Ntawm qhov teeb tsa LED tau ua tiav. Lus txav mus rau lub hauv paus ntawm teeb tsa. nws yog ib qho kev coj ua zoo los teeb tsa lub hauv paus tiv thaiv ntawm no 10kΩ los tiv thaiv lub transistor (txawm hais tias peb tau mob siab rau muab cov tswv yim tsis muaj zog ntawm lub hauv paus.) !! Tsis txhob hnov qab qhov no !!

Kauj Ruam 5: Ua Kom Nws Muaj Zog

Txuas lub davhlau ya nyob twg zoo ntawm lub zog hluav taws xob mus rau lwm qhov kawg ntawm 100Ω resistor. thiab lub davhlau ya nyob twg tsis zoo ntawm lub zog xa mus rau tus emitter ntawm transistor 1. Nws tau ua tiav lawm!

Kauj Ruam 6: Xeem

Wb sim nws, kov qhov tsis txuas ntawm 10kΩ resistor, yog tias txhua yam mus tau zoo. LED yuav tsum teeb tab sis vim li cas? vim li cas nws thiaj ci vim yog kov yooj yim Cov lus teb yooj yim yog kov cov tshuaj tiv thaiv kab mob ua rau ib feeb tawm ntawm tes los ua tus coj, ntawm qhov kev txiav txim ntawm nano Amperes rau micro Amperes. thiab tom qab ntawd tau nthuav dav los ntawm darlington khub, ua rau muaj qhov loj tam sim no hauv cov khoom siv hluav taws xob tso tawm, loj txaus los tsav LED lossis lwm yam, nws nyob ntawm lub hwj chim thiab nws muaj peev xwm xa tawm.

Kauj ruam 7: Dab tsi ntxiv?

Cov kab hluav taws xob tshwj xeeb no nkag siab txaus txawm tias pom lub suab hluav taws xob tsuas yog txuas lub xov hlau ntev txaus rau 10kΩ resistors lwm qhov kawg. LED yuav tsum ci.

Kauj Ruam 8: Teeb meem thiab sau ntawv

Siv lub ntsuas hluav taws xob multimeter ntsuas los txheeb xyuas thiab txheeb xyuas qhov kawg ntawm transistor. Yuav kom tsis txhob tshuab lub transistor.- yog tias LED tsis ci zoo li ci (zoo txaus) raws li kuv tau hais, thiab koj tab tom siv xov tooj ntawm tes lossis roj teeb. Tom qab ntawv muaj lub sijhawm zoo uas koj lub roj teeb yuav qis.