Semiconductor transistor
Nov 05, 2019| Nyob ruaj ntseg nrog SChitec
Semiconductor transistor
Nws yog ib qho khoom siv semiconductor uas muaj ob lub PN junctions, feem ntau nrog peb cov electrodes rho tawm sab nraud. Nws muaj cov haujlwm ntawm amplification thiab switching ntawm hluav taws xob teeb liab, thiab yog dav siv. Ob theem input thiab theem tso zis siv transistor logic circuit hu ua transistor-transistor logic circuit. Nyob rau hauv cov phau ntawv thiab kev siv tswv yim, nws tsuas yog hu ua TTL circuit. Nws yog ib hom semiconductor integrated circuit, thiab feem ntau yog TTL NAND rooj vag. TTL NAND rooj vag yog ib qho system ntawm ob peb transistors thiab resistors uas yog fabricated rau ib daim me me ntawm silicon thiab ntim rau hauv ib qho kev tivthaiv. Semiconductor triodes yog ib qho ntawm cov khoom siv dav siv hauv circuits, thiab tau sawv cev los ntawm "V" lossis "VT" (cov ntawv qub cim yog "Q", "GB", thiab lwm yam) hauv Circuit Court.
Semiconductor triodes poob rau hauv ob pawg tseem ceeb: bipolar transistors (BJT) thiab field effect transistors (FETs). Lub transistor muaj peb tug ncej; peb tus ncej ntawm bipolar transistor yog tsim los ntawm N-hom thiab P-hom emitter (Emitter), lub hauv paus (Base) thiab tus sau (Collector); peb tus ncej ntawm lub teb cov nyhuv transistor yog raws li Qhov Chaw, Qhov Rooj, thiab Drain. Vim tias muaj peb hom polarities, muaj peb txoj hauv kev siv lawv: emitter grounding (tseem hu ua common-emitter amplification, CE configuration), base grounding, thiab collector grounding. Kev siv ntau tshaj plaws yuav tsum yog nyob rau hauv nam ntawm lub teeb liab amplification, ua raws li impedance txuam, teeb liab hloov dua siab tshiab, thiab lwm yam Transistors yog ib qho tseem ceeb nyob rau hauv lub Circuit Court. Ntau cov khoom siv precision feem ntau yog ua los ntawm transistors.
Txawm hais tias lub triode lub transistor yog nyob rau hauv lub amplified lub xeev los yog lub xeev hloov nyob rau hauv lub DC bias siv rau lub hauv paus ntawm lub triode. Nrog rau qhov kev hloov tam sim no, lub triode kev khiav hauj lwm lub xeev yog hloov los ntawm lub off-linear cheeb tsam-saturation xeev, yog lub triode Ib (DC bias) Thaum lub sij hawm, lub triode ua hauj lwm nyob rau hauv linear cheeb tsam. Lub sijhawm no, qhov kev hloov ntawm Ic tam sim no tsuas yog hloov nrog AC teeb liab ntawm Ib, Ib txuas ntxiv, thiab triode nkag mus rau lub xeev saturation. Lub sijhawm no, Ic ntawm triode tsis hloov, thiab triode yuav ua haujlwm hauv qhov hloov. xwm txheej.
Thaum lub triode siv los ua lub raj hloov, nws ua haujlwm hauv lub xeev saturated 1, thiab nws tsis yog kev tshawb fawb heev los siv lub xeev amplification 1.
Thov xa mus rau kuv cov lus teb hauv Ib; Ic nkhaus ntawm phau ntawv triode kom nkag siab txog lub xeev ua haujlwm ntawm triode, thiab triode yuav thiab ce junction triode tuaj yeem ua haujlwm ib txwm.
Yog tias lub triode tsis cuam tshuam nrog DC, thaum AC sinusoidal teeb liab tawm tswv yim thaum lub sij hawm amplifying Circuit Court yog ib nrab ib lub lim tiam, lub hauv paus yog qhov zoo rau cov emitter. Txij li thaum lub emitter yog siv nrog ib tug rov qab voltage, tsis muaj lub hauv paus tam sim no thiab collector. Tam sim no, lub sij hawm no, lub collector tam sim no hloov thiab lub hauv paus yog inverted. Ntawm qhov tsis zoo ib nrab ntawm cov input voltage, lub peev xwm emitter yog qhov zoo rau lub hauv paus peev xwm. Lub sijhawm no, txij li cov emitter tau thov nrog rau pem hauv ntej voltage, lub hauv paus thiab cov khoom siv tau muaj. Thaum tam sim no dhau mus, cov khoom siv tam sim no hloov mus rau theem nrog lub hauv paus. Thaum lub triode tsis yog DC biased, lub triode yuav thiab ce junctions yog qhib. Lub triode amplifier Circuit Court yuav tsuas muaj ib nrab ntawm yoj tawm thiab yuav ua rau hnyav heev