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Cov peev txheej ntxiv

Diodes yog ob lub davhlau ya nyob twg hluav taws xob uas ua tam sim no feem ntau hauv ib qho kev taw qhia (asymmetric conductance);Nws muaj qhov tsis muaj zog nyob rau hauv ib qho kev taw qhia (zoo tagnrho xoom) thiab siab tsis kam nyob rau lwm qhov kev taw qhia (zoo tagnrho infinite).Lub diode nqus raj lossis thermoelectron diode yog lub tshuab nqus tsev nrog ob lub electrodes, lub rhaub cathode thiab lub phaj uas cov electrons tuaj yeem ntws los ntawm cathode mus rau phaj hauv ib qho kev taw qhia xwb.Ib tug semiconductor diode, feem ntau siv hom niaj hnub no, yog crystalline semiconductor khoom nrog pn hlws ris txuas nrog ob lub tshuab hluav taws xob.

Txoj haujlwm feem ntau ntawm lub diode yog tso cai rau tam sim no dhau mus rau hauv ib qho kev taw qhia (hu ua kev taw qhia pem hauv ntej ntawm lub diode), thaum thaiv nws nyob rau sab nraud (rov qab).Nyob rau hauv txoj kev no, lub diode tuaj yeem raug saib raws li cov khoom siv hluav taws xob ntawm qhov rov qab valve.Qhov kev coj cwj pwm no yog hu ua rectification thiab siv los hloov pauv tam sim no (ac) mus rau tam sim no (dc).Rectifiers, nyob rau hauv daim ntawv ntawm diodes, yuav siv tau rau cov dej num xws li rho tawm modulation los ntawm xov tooj cua signals nyob rau hauv lub xov tooj cua receiver.

Txawm li cas los xij, vim yog cov yam ntxwv tsis yog tam sim no-voltage ntawm diode, nws tus cwj pwm tuaj yeem ua ntau dua li qhov kev hloov pauv yooj yim no.Ib lub semiconductor diode ua hluav taws xob tsuas yog thaum muaj qhov ntsuas hluav taws xob lossis qhov hluav taws xob nkag mus rau pem hauv ntej (lub diode tau hais tias nyob rau hauv pem hauv ntej tsis ncaj ncees).Qhov hluav taws xob poob ntawm ob qho tag nrho ntawm lub taub hau-biased diode sib txawv me ntsis nrog rau tam sim no thiab yog qhov ua haujlwm ntawm qhov kub thiab txias.Cov nyhuv no tuaj yeem siv los ua qhov ntsuas kub ntsuas lossis siv hluav taws xob.Tsis tas li ntawd, thaum qhov hluav taws xob rov qab ntawm ob qhov kawg ntawm lub diode nce mus txog tus nqi hu ua qhov hluav taws xob tawg, qhov siab tsis kam ntawm lub diode mus rau qhov rov qab ntws tam sim ntawd poob rau qhov tsis muaj zog.

Cov yam ntxwv tam sim no-voltage ntawm semiconductor diodes tuaj yeem hloov kho los ntawm kev xaiv cov khoom siv semiconductor thiab qhia txog doping impurities hauv cov khoom thaum lub sijhawm tsim khoom.Cov txheej txheem no yog siv los tsim cov diodes tshwj xeeb uas ua haujlwm ntau yam sib txawv.Piv txwv li, diodes yog siv los tswj qhov voltage (Zener diodes), tiv thaiv circuits los ntawm high-voltage surges (avalanche diodes), electronically tune radio thiab TV receivers (varator diodes) los tsim RF oscillations (tunnel diodes), Gunn diodes, IMPATT diodes. , thiab tsim lub teeb (lub teeb-emitting diodes).Qhov diodes, Gunn diodes, thiab IMPATT diodes muaj qhov tsis zoo tiv thaiv, uas muaj txiaj ntsig zoo hauv microwave thiab hloov circuits.

Ob lub tshuab nqus tsev diodes thiab semiconductor diodes tuaj yeem siv los ua cov suab nrov nrov.