Cov txheej txheem:
- Kauj ruam 1: Txoj kev xav
- Kauj Ruam 2: Xaiv Ib thiab R4
- Kauj Ruam 3: Ua Qhov Chaw Tam Sim No
- Kauj Ruam 4: Rooj Sib Tham Kawg
- Kauj ruam 5: Qhov tshwm sim
- Kauj ruam 6: 2nd Version
Video: Beta Meter: 6 Kauj Ruam
2024 Tus sau: John Day | [email protected]. Kawg hloov kho: 2024-01-30 09:26
Muaj ib hnub koj xav dhau los ua nerd, kawm transistor, los paub txog qhov hloov pauv beta (nce tam sim no) ntawm transistor, koj dhau los ua neeg xav paub thiab yuav ib qho tab sis tsis muaj peev xwm yuav yuav lub ntsuas ntsuas uas qhia koj tus nqi beta ntawm transistor. Qhov haujlwm no ntsuas tus nqi beta ntawm transistor nrog qhov raug ntawm ± 10.
Ua raws cov kauj ruam! Koj yuav xav tau qee qhov lej:)
Kauj ruam 1: Txoj kev xav
Thaum koj dhau los ua neeg nerd thawj qhov koj yuav kawm hauv transistor yog lub hauv paus yog tus thawj coj.ie,. lub hauv paus tam sim no txiav txim siab cov khoom siv tam sim no (dc) muab los ntawm qhov sib npaug:
Ic = β*Ib β: tam sim no Tau tam sim no los ntawm omhs txoj cai hla tus tiv thaiv (R4) peb tau txais Ic = V/R4 V: muaj peev xwm hla R4
V = β*Ib*R4 Tam sim no yog tias peb ntsuas V nrog mili-voltmeter khaws Ib*R4 = 10^-3V qhov nyeem ntawv yuav yog β mV.
Kauj Ruam 2: Xaiv Ib thiab R4
Raws li muaj 2 qhov sib txawv thiab ib qho kev ua zauv, peb yuav tsum muaj qee cov ntaub ntawv ntau ntxiv lossis tsis siv los xaiv qhov txiaj ntsig ntawm tus tiv thaiv thiab lub peev xwm. Peb coj mus rau hauv kev txiav txim siab lub zog tso tawm hauv transistor uas yuav tsum tsis pub tshaj nws lub peev xwm, piv txwv. 250mW ** (qhov teeb meem phem tshaj plaws lub zog xa tawm, thaum BJT mus rau qhov txaus).
ua raws li qhov xav tau coj R4 = 100 Ω, raws li Ib = 10 μA.
** tiv tauj rau cov ntaub ntawv ntxiv.
Kauj Ruam 3: Ua Qhov Chaw Tam Sim No
Qhov no hauv nws tus kheej yog qhov siv tau zoo heev ntawm transistor. Ntxiv dua lwm qhov yam ntxwv tseem ceeb ntawm p-n kev sib tshuam yog qhov muaj peev xwm poob thoob plaws kev sib tshuam hauv ntej kev tsis ncaj ncees yog qhov tas li thiab feem ntau yog 0.7 V rau silicon sub xeev.
coj qhov ntawd mus rau hauv tus lej lub hauv paus voltage Vb yog qhov ruaj khov 0.74 V (sim) thiab lub hauv paus-emitter voltage yog 0.54 V yog li lub peev xwm hla R2 yog 0.2 V (0.74-0.54) uas yog qhov tas li.
Raws li qhov muaj peev xwm hla tus resistor R2 yog qhov tam sim no tseem yuav raug muab los ntawm 0.2/R2 A. qhov xav tau tam sim no yog 10 μA, R2 = 20 kΩ.
Cov peev txheej tam sim no yog ywj siab ntawm Rl (thauj tsis kam) thiab cov hluav taws xob nkag V1.
Kauj Ruam 4: Rooj Sib Tham Kawg
Nyob rau hauv qhov chaw Rl txuas lub hauv paus ntawm transistor uas yuav tsum tau tshuaj xyuas.
NCO TSEG: Cov txiaj ntsig hauv daim duab qhia saum toj no sib txawv vim tias transistor hauv qhov chaw tam sim no tsis zoo ib yam. Yog li, tsis txhob dig muag siv cov resistors raws li muab hauv daim duab qhia chaw, ntsuas thiab suav.
Kauj ruam 5: Qhov tshwm sim
Tom qab txhua qhov kev sib txuas thov siv qhov hluav taws xob tas li piv txwv li 1.5V, 3V, 4.5V, 5V (pom zoo), 9V ntsuas qhov muaj peev xwm hla R4 (tus neeg tiv taus = 100Ω) siv lub mili-voltmeter lossis multimeter.
Tus nqi ntsuas yuav yog β (nce tam sim no) ntawm transistor.
Kauj ruam 6: 2nd Version
Txhawm rau kom muaj zog β meter tsim raws li hauv qab no:
www.instructables.com/id/%CE%92-Meter-Vers…
Pom zoo:
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