Schottky diode: dab tsi yog nws thiab dab tsi tshwj xeeb txog nws

schottky diode

El schottky diode yog lwm ntawm cov Hluav taws xob Cheebtsam nthuav tshaj plaws rau electronics tej yaam num. Ib hom tshwj xeeb ntawm diode uas muaj qee qhov peculiarities uas ua rau nws tshwj xeeb thiab siv tau rau qee yam kev siv. Muab nws qhov kev hloov pauv siab, nws kuj tau siv dav hauv TTL logic ICs.

Hauv phau ntawv no koj yuav paub tias yog dab tsi Schottky diode, leej twg tsim nws, nws cov khoom, kev siv, qhov twg koj tuaj yeem yuav nws, thiab lwm yam.

Dab tsi yog diode?

cim thiab pinout ntawm diode 1n4148

Un semiconductor diode Nws yog ib qho khoom siv hluav taws xob nrog 2 lub davhlau ya nyob twg uas tso cai rau kev ncig ntawm hluav taws xob tam sim no los ntawm nws, tab sis tsuas yog nyob rau hauv ib qho kev taw qhia, thaiv txoj kev mus rau lwm qhov. Cov khoom no ua rau lawv muaj txiaj ntsig zoo rau ntau yam kev siv, xws li cov khoom siv hluav taws xob. Nws kuj tuaj yeem siv rau kev tswj hwm.

Muaj ntau ntau hom diodes, xws li:

  • Avalanche diode los yog TVS, uas coj nyob rau hauv lub opposite kev taw qhia thaum lub rov qab voltage tshaj lub breakdown voltage.
  • LED diode, muaj peev xwm ntawm emitting lub teeb ntawm cov xim sib txawv nyob ntawm seb muaj pes tsawg leeg. Qhov no tshwm sim thaum tus nqi thauj khoom hla kev sib tshuam thiab tso tawm photons.
  • tunnel effect diode los yog Esaki, uas tso cai rau kom amplify signals thiab ua hauj lwm ntawm high speeds. Lawv tuaj yeem siv nyob rau hauv ib puag ncig uas tsis tshua muaj kub, siab magnetic teb, thiab hluav taws xob siab vim muaj kev them nqi siab.
  • Gunn diode, zoo ib yam li cov tunnel thiab uas tsim ib tug tsis zoo kuj.
  • laser diode, zoo ib yam li LED, tab sis muaj peev xwm emit ib tug laser beam.
  • thermal diode, tuaj yeem ua tus ntsuas kub, txij li nyob ntawm nws, qhov voltage sib txawv.
  • Photodiodes, txuas rau optical chargers, uas yog, rhiab rau lub teeb. Lawv kuj tseem siv tau ua lub teeb sensors.
  • PIN diode, yog zoo li ib txwm hlws ris, tab sis nrog ib tug central seem tsis muaj dopant. Ntawd yog, txheej txheej sab hauv nruab nrab ntawm P thiab N. Lawv yog siv los ua cov hloov hluav taws xob siab, attenuators, lossis ionizing hluav taws xob ntes.
  • Schottky diode, no diode yog ib tug uas txaus siab rau peb rau qhov tsab xov xwm no, nws yog ib tug diode nrog kev sib cuag hlau uas muaj ib tug tsawg dua tawg voltage tshaj lub PN.
  • stabistor los yog xa mus rau kev siv diode, muaj peev xwm ua tau zoo heev nyob rau hauv pem hauv ntej voltage.
  • varicap kev, qhov sib txawv capacitance diode.

Schottky diode yog dab tsi?

schottky diode

El Schottky diode tau muaj npe tom qab German physicist Walter Hermann Schottky., txij li thaum nws tsim Schottky barrier (hlau-semiconductor lossis MS junction) es tsis txhob siv cov khoom siv hluav taws xob sib txuas. Vim li ntawd, hauv qee qhov chaw koj yuav pom nws nyob rau hauv lub npe Schottky barrier diode lossis nto barrier diode.

Ua tsaug rau lub union, no diode muaj ib tug qis rau pem hauv ntej voltage poob tshaj PN diode, thiab tuaj yeem siv rau hauv xov tooj cua zaus (RF) thiab kev siv hluav taws xob hloov ceev. Tsis tas li ntawd, lwm qhov sib txawv nrog cov silicon PN hlws ris diode yog tias nws muaj qhov raug xa mus rau qhov hluav taws xob ntawm 0.6 txog 0.75V, thaum Schottky ib qho yog 0.15 txog 0.45V. Qhov kev xav tau qis dua rau qhov voltage yog qhov ua rau lawv hloov sai dua.

Qhov poob tuaj yeem sib txawv ntawm ib qho Schottky diode mus rau lwm qhov, vim nws nyob ntawm cov hlau siv. Yuav kom paub seb nws yog dab tsi, nyeem cov khoom tsim cov ntaub ntawv cov ntaub ntawv.

Rov qab rau cov ncauj lus ntawm lub MS union, cov hlau feem ntau yog tungsten, chromium, platinum, molybdenum, qee cov silicides (ntau heev vim tias lawv pheej yig, muaj ntau thiab muaj cov conductivity zoo), lossis kuj kub, thaum lub semiconductor feem ntau yog N-hom doped silicon, txawm hais tias kuj muaj lwm yam. Cov khoom siv semiconductors. Sab hlau yog lub anode, thaum lub semiconductor sab sib haum mus rau cathode.

Lub Schottky diode tsis muaj depletion txheej, thiab raug cais raws li cov khoom siv hluav taws xob unipolar, tsis yog bipolar zoo li PNs. Tsis tas li ntawd, tam sim no yuav tshwm sim los ntawm feem ntau cov neeg nqa khoom (electrons) drifting los ntawm diode, thiab vim tias tsis muaj P-zone, tsis muaj cov neeg nqa khoom tsawg (qhov), thiab thaum thim rov qab, lub diode conducts yuav nres tam sim ntawd, throttling qhov ntws ntawm tam sim no.

Schottky diode ua haujlwm

Raws li rau Schottky diode ua haujlwm, tuaj yeem ua ntau txoj hauv kev nyob ntawm qhov polarization:

  • tsis polarized: Tsis muaj kev tsis ncaj ncees, MS kev sib txuas (ua N-hom semiconductor), cov khoom siv hluav taws xob hluav taws xob lossis cov hluav taws xob dawb txav ntawm cov khoom siv hluav taws xob mus rau cov hlau los tsim kom muaj kev sib npaug. Raws li koj paub, thaum lub nruab nrab atom tau txais ib qho hluav taws xob nws dhau los ua qhov tsis zoo ion, thiab thaum nws poob nws dhau los ua ib qho zoo ion. Qhov ntawd yuav ua rau cov hlau atoms dhau los ua cov ions tsis zoo thiab cov nyob rau sab semiconductor kom zoo, ua raws li thaj tsam depletion. Txij li cov hlau muaj ntau cov electrons dawb, qhov dav ntawm qhov uas cov electrons txav tsis zoo piv rau qhov dav hauv cheeb tsam N-hom, qhov no ua rau muaj peev xwm ua tau (voltage) feem ntau nyob rau hauv N-zone. voltage yuav yog qhov teeb meem uas tau ntsib los ntawm electrons nyob rau hauv lub semiconductor conduction band thaum sim mus rau sab hlau (tsuas yog ib tug me me ntawm electrons ntws los ntawm S mus rau M). Yuav kom kov yeej qhov teeb meem no, cov khoom siv hluav taws xob dawb xav tau lub zog ntau dua li qhov hluav taws xob built-in lossis yuav tsis muaj tam sim no.
  • Ncaj polarization: Thaum lub davhlau ya nyob twg zoo ntawm lub zog hluav taws xob txuas nrog lub davhlau ya nyob twg hlau (anode) thiab lub davhlau ya nyob twg tsis zoo rau N-hom semiconductor (cathode), Schottky diode yog rau pem hauv ntej biased. Qhov ntawd ua rau muaj coob tus dawb electrons hauv M thiab S, tab sis lawv tsis tuaj yeem hla tshwj tsis yog tias qhov siv hluav taws xob ntau tshaj 0.2v, kom kov yeej qhov teeb meem ntawd (kev sib xyaw ua ke). Ntawd yog, tam sim no ntws.
  • Rov qab polarization: Nyob rau hauv rooj plaub no, qhov tsis zoo ntawm cov khoom siv hluav taws xob yuav txuas nrog rau sab hlau (anode), thiab qhov zoo rau N-hom semiconductor (cathode). Nyob rau hauv tas li ntawd, qhov dav ntawm lub depletion cheeb tsam nce thiab tam sim no ntws raug txiav tawm. Tsis yog txhua qhov tam sim no raug txiav tawm, vim tias muaj qhov me me ntws tam sim no vim yog thermally zoo siab electrons hauv cov hlau. Yog hais tias qhov rov qab bias voltage yog nce, cov hluav taws xob tam sim no yuav maj mam nce vim qhov tsis muaj zog ntawm qhov barrier. Thiab yog hais tias nws ncav cuag ib tug nqi, ib tug tam sim ntawd nce nyob rau hauv hluav taws xob tam sim no tshwm sim, rhuav lub depletion cheeb tsam thiab ua rau lub Schottky diode mus tas li.

Qhov zoo thiab qhov tsis zoo ntawm Schottky diode

Raws li ib txwm muaj nrog txhua yam khoom siv lossis qhov system, koj ib txwm muaj nws qhov zoo thiab qhov tsis zoo. Nyob rau hauv cov ntaub ntawv ntawm Schottky diode lawv yog:

Schottky Diode Advantages

  • Tsawg junction capacitance: Hauv PN diode thaj tsam depletion yog tsim los ntawm cov nqi khaws cia thiab muaj qhov muaj peev xwm. Hauv Schottky diode cov nqi no tsis tsim nyog.
  • Fast rov qab lub sij hawm: yog lub sij hawm uas lub diode yuav siv sij hawm los ntawm ON (conductive) mus rau OFF (tsis yog-conductive), uas yog, hloov ceev. Qhov no muaj feem xyuam rau cov saum toj no, vim hais tias nyob rau hauv thiaj li yuav kis tau los ntawm ib lub xeev mus rau lwm lub, cov nqi khaws cia nyob rau hauv lub depletion cheeb tsam yuav tsum tau muab tshem tawm los yog tshem tawm, raws li lawv yog tsawg nyob rau hauv lub Schottky, nws yuav dhau los ntawm ib theem mus rau lwm sai. .
  • high tam sim no ceev: Lwm qhov laj thawj ntawm qhov saum toj no yog qhov me me voltage txaus los tsim cov tam sim no loj vim tias thaj tsam depletion yuav luag tsis pom zoo.
  • Tsawg pem hauv ntej voltage poob los yog qis ignition voltage: Nws yog qis dua piv rau PN junction diode, feem ntau yog 0.2v rau 0.3v, thaum PNs feem ntau nyob ib ncig ntawm 0.6 lossis 0.7v. Ntawd yog, tsawg dua voltage yog xav tau los tsim cov dej ntws tam sim no.
  • High efficiency: txheeb ze rau saum toj no, thiab qhov no kuj txhais tau tias tsis tshua muaj cua sov dissipation nyob rau hauv high-power circuits.
  • Haum rau high zaus: Ua nrawm, lawv tuaj yeem ua haujlwm zoo hauv RF daim ntawv thov.
  • Tsawg suab nrov: Schottky diode ua kom tsis muaj suab nrov tsawg dua li cov khoom siv diodes.

Schottky Diode Disadvantages

Piv nrog rau lwm yam bipolar diodes, Schottky diode tsuas muaj ib qho tsis zoo:

  • High rov qab saturation tam sim no: ua kom rov qab saturation tam sim no ntau dua PN.

Qhov sib txawv nrog PN junction diode

Sib piv Schottky diode nkhaus

Yog xav paub ntxiv txog dab tsi Schottky diode tuaj yeem pab txhawb rau koj qhov project, koj tuaj yeem pom cov duab yav dhau los nrog cov nkhaus ntawm PN silicon thiab GaAs diodes, thiab Schottky hom rau cov tib semiconductors. Qhov sib txawv Qhov tseem ceeb tshaj plaws yog:

Schottky diode Tom ntej: PN Junction Diode
Hlau-semiconductor hlws ris hom N PN semiconductor hlws ris.
Tsawg pem hauv ntej voltage poob. High forward voltage poob.
Tsawg rov qab rov qab poob thiab rov qab lub sijhawm. Siab rov qab poob poob thiab rov qab lub sij hawm rov qab.
Nws yog unipolar. Nws yog bi-polar.
Cov tam sim no tsuas yog tsim los ntawm kev txav ntawm electrons. Tam sim no yog tsim los ntawm kev txav ntawm qhov thiab electrons.
Hloov ceev. Hloov qeeb.

Kev siv tau ntawm Schottky diode

Schottky diodes muaj ntau heev nyob rau hauv ntau yam khoom siv hluav taws xob. Lawv cov khoom tshwj xeeb thiab qhov zoo dua lwm cov diodes txhais tau tias lawv muaj kev siv ntau yam li:

  • Rau RF circuits.
  • raws li lub hwj chim rectifiers.
  • Rau cov khoom siv hluav taws xob sib txawv heev.
  • Hauv cov tshuab nrog cov hnub ci vaj huam sib luag los tiv thaiv lawv los ntawm kev rov qab them cov roj teeb uas lawv feem ntau txuas nrog.
  • Thiab ntau ntxiv ...

Thiab rau qhov no, lawv tuaj yeem nthuav tawm ob leeg ntawm nws tus kheej, xws li embedded hauv ICs.

qhov twg yuav cov diodes no

Yog tias koj xav tau Schottky diodes rau koj cov haujlwm lossis pib sim nrog lawv thiab nkag siab zoo dua, koj tuaj yeem nrhiav lawv ntawm ntau lub khw muag khoom tshwj xeeb, nrog rau Amazon. Ntawm no koj muaj qee qhov kev pom zoo:


Cov ntsiab lus ntawm tsab xov xwm ua raws li peb cov ntsiab cai ntawm kev tswj hwm kev ncaj nceesCov. Tshaj tawm ib qho yuam kev nyem no.

Yog thawj tus tuaj tawm tswv yim

Tso koj saib

Koj email chaw nyob yuav tsis tsum luam tawm.

*

*

  1. Lub luag haujlwm rau cov ntaub ntawv: Miguel Ángel Gatón
  2. Lub hom phiaj ntawm cov ntaub ntawv: Tswj SPAM, kev tswj xyuas tawm tswv yim.
  3. Sau raws cai: Koj kev tso cai
  4. Kev sib txuas lus ntawm cov ntaub ntawv: Cov ntaub ntawv yuav tsis raug xa mus rau lwm tus neeg thib peb tsuas yog los ntawm kev txiav txim siab raug cai.
  5. Cov ntaub ntawv khaws cia: Cov Ntaub Ntawv khaws tseg los ntawm Occentus Networks (EU)
  6. Txoj Cai: Txhua lub sijhawm koj tuaj yeem txwv, rov qab thiab tshem tawm koj cov ntaub ntawv.

xeem lus AskivTest Catalanlus spanish quiz