Lub ntiaj teb ntawm cov khoom siv hluav taws xob tso siab rau ntau yam cam khwb cia ntawm cov cim, txhua tus ua lub luag haujlwm tseem ceeb. Ntawm cov no, diodes sawv tawm rau lawv lub peev xwm los tswj cov dej ntws ntawm hluav taws xob. Niaj hnub no, peb delve rau hauv ib hom - Schottky diode, ib tug tshwj xeeb sib tov ntawm hlau thiab semiconductor nrog ib tug ntau yam ntawm cov kev siv tseem ceeb.
Nkag siab txog Schottky Diode
Tsis zoo li feem ntau pn hlws ris diode, Schottky diode tsim ib qho kev sib tshuam ntawm ib tug hlau thiab ib tug semiconductor. Qhov no tsim Schottky barrier, ib cheeb tsam uas electron ntws txwv. Thaum ib qho hluav taws xob tau siv rau hauv kev taw qhia pem hauv ntej (zoo ntawm sab hlau), cov hluav taws xob kov yeej qhov teeb meem thiab tam sim no ntws yooj yim. Txawm li cas los xij, kev siv hluav taws xob thim rov qab ua rau muaj kev cuam tshuam muaj zog, cuam tshuam cov dej ntws tam sim no.
Cim thiab yam ntxwv
Lub Schottky diode lub cim zoo ib yam li ib txwm diode nrog kab rov tav bisecting daim duab peb sab taw tes rau qhov zoo davhlau ya nyob twg. Nws VI tus yam ntxwv nkhaus zoo ib yam li pn hlws ris diode, tab sis nrog qhov sib txawv tseem ceeb: qhov qis qis rau pem hauv ntej voltage poob, feem ntau ntawm 0.2 txog 0.3 volts. Qhov no txhais tau tias txo qis zog thaum lub sijhawm ua haujlwm.
Txoj Cai Ua Haujlwm
Lub hauv paus ntsiab lus tseem ceeb tom qab Schottky diode txoj haujlwm yog nyob rau hauv qhov sib txawv muaj peev xwm ntawm electrons hauv cov khoom sib txawv. Thaum cov hlau thiab n-hom semiconductor nkag mus rau hauv kev sib cuag, electrons ntws hla kev sib tshuam hauv ob qho tib si. Siv ib qho hluav taws xob rau pem hauv ntej ntxiv dag zog rau qhov ntws mus rau lub semiconductor, ua kom muaj qhov tam sim no.
Daim ntawv thov ntawm Schottky Diode
Schottky diodes pom lawv tus kheej hauv ntau daim ntawv thov hluav taws xob vim lawv cov khoom tshwj xeeb:
RF Mixers thiab Detectors: Lawv qhov tshwj xeeb hloov pauv ceev thiab muaj peev xwm muaj peev xwm ua rau lawv zoo tagnrho rau kev siv xov tooj cua zaus (RF) xws li diode nplhaib mixers.
Lub Hwj Chim Rectifiers: Lub peev xwm los tswj cov hluav taws xob siab thiab qhov hluav taws xob nrog lub zog qis rau pem hauv ntej ua rau lawv muaj zog rectifiers, txo qis zog poob piv rau pn junction diodes.
Lub Hwj Chim OR Circuits: Hauv cov khoom siv hluav taws xob uas muaj ob lub zog tsav tsheb thauj khoom (xws li roj teeb thaub qab), Schottky diodes tiv thaiv tam sim no los ntawm ntws rov qab rau hauv ib qho khoom siv los ntawm lwm qhov.
Daim Ntawv Thov Hnub Ci: Lub hnub ci vaj huam sib luag feem ntau txuas nrog cov roj teeb uas siv tau, feem ntau yog lead-acid. Txhawm rau tiv thaiv tam sim no los ntawm ntws rov qab rau hauv lub hnub ci hnub ci thaum hmo ntuj, Schottky diodes yog siv hauv kev teeb tsa bypass.
Qhov zoo thiab qhov tsis zoo
Schottky diodes muaj ntau yam zoo:
Tsawg Capacitance: Lub cheeb tsam depletion tsis pom zoo ua rau muaj peev xwm tsawg, ua rau lawv tsim nyog rau kev siv ntau zaus.
Fast Switching: Kev hloov pauv sai ntawm rau mus rau lub xeev tso cai rau kev ua haujlwm siab.
High Current Density: Lub cheeb tsam me me ua rau lawv tswj tau qhov ceev tam sim no.
Tsawg Tig-On Voltage: Lub pem hauv ntej voltage poob ntawm 0.2 mus rau 0.3 volts yog ho qis dua pn hlws ris diodes.
Txawm li cas los, muaj ib tug tseem ceeb drawback:
High Reverse Leakage Tam sim no: Schottky diodes nthuav tawm ntau dua rov qab xau tam sim no piv rau pn junction diodes. Qhov no tuaj yeem ua rau muaj kev txhawj xeeb hauv qee yam kev siv.
Xaus
Lub Schottky diode, nrog nws cov cim tshwj xeeb hlau-semiconductor hlws ris, muaj kev sib xyaw ua ke ntawm kev poob qis rau pem hauv ntej, hloov ceev ceev, thiab muaj peev xwm tuav tam sim no. Qhov no ua rau lawv irreplaceable Cheebtsam nyob rau hauv ntau yam hluav taws xob circuits, los ntawm lub hwj chim mov mus rau lub hnub ci zog systems. Raws li kev siv thev naus laus zis txuas ntxiv mus, Schottky diode paub tseeb tias yuav nyob twj ywm ua haujlwm ruaj khov hauv kev lag luam hluav taws xob.
Post lub sij hawm: Jun-13-2024