Schottky diode: ndi chiyani ndipo ndi chiyani chapadera pa izo

schottky diode

El schottky diode ndi ina mwa Zida zamagetsi chosangalatsa kwambiri pama projekiti amagetsi. Mtundu wapadera wa diode womwe uli ndi zina zomwe zimapangitsa kuti ikhale yapadera komanso yothandiza pazinthu zina. Popeza kuthamanga kwake kwakusintha kwakukulu, imagwiritsidwanso ntchito kwambiri mu TTL logic ICs.

Mu bukhuli mutha kudziwa chomwe chiri Schottky diode, amene anayambitsa izo, katundu wake, ntchito, kumene inu mukhoza kugula izo, etc.

Kodi diode ndi chiyani?

chizindikiro ndi pini ya diode 1n4148

Un semiconductor diode Ndi gawo lamagetsi lomwe lili ndi ma terminals a 2 omwe amalola kufalikira kwa magetsi kudzera pamenepo, koma mbali imodzi, kutsekereza ndimeyi kupita kwina. Zinthuzi zimapangitsa kuti zikhale zothandiza kwambiri pazinthu zosiyanasiyana, monga magetsi. Itha kugwiritsidwanso ntchito pakuwongolera.

Pali mitundu yosiyanasiyana ya diode, monga:

  • Avalanche diode kapena TVS, zomwe zimayendera mbali ina pamene voteji ya reverse idutsa mphamvu yowonongeka.
  • LED diode, yomwe imatha kutulutsa kuwala kwamitundu yosiyanasiyana malinga ndi kapangidwe kake. Izi zimachitika pamene zonyamulira zonyamula zidutsa pamphambano ndikutulutsa mafotoni.
  • Tunnel effect diode kapena Esaki, zomwe zimalola kukulitsa ma signature ndikugwira ntchito mothamanga kwambiri. Atha kugwiritsidwa ntchito m'malo okhala ndi kutentha kochepa kwambiri, maginito okwera kwambiri, komanso ma radiation ochulukirapo chifukwa cha kuchuluka kwamphamvu.
  • Gunn diode, zofanana ndi za tunnel ndipo zimatulutsa kukana koyipa.
  • laser diode, zofanana ndi LED, koma zimatha kutulutsa mtengo wa laser.
  • diode yotentha, ikhoza kukhala ngati sensor ya kutentha, chifukwa kutengera izo, mphamvu yamagetsi imasiyanasiyana.
  • Zithunzi, zolumikizidwa ndi zonyamulira za optical charge, ndiko kuti, tcheru pakuwala. Atha kugwiritsidwanso ntchito ngati masensa opepuka.
  • PIN diode, ili ngati mphambano yachibadwa, koma ndi gawo lapakati lopanda dopant. Ndiko kuti, wosanjikiza wamkati pakati pa P ndi N. Amagwiritsidwa ntchito ngati masiwichi othamanga kwambiri, ma attenuators, kapena zowunikira ma radiation ya ionizing.
  • Chidwi cha Schottky, diode iyi ndi yomwe imatisangalatsa pankhaniyi, ndi diode yokhala ndi zitsulo zolumikizana zomwe zimakhala ndi mphamvu yotsika kwambiri kuposa PN.
  • stabistor kapena diode yolozera kutsogolo, yokhoza kukhala yokhazikika kwambiri pamagetsi akutsogolo.
  • varicap, diode yosinthika ya capacitance.

Kodi Schottky diode ndi chiyani?

schottky diode

El Schottky diode adatchulidwa pambuyo pa wasayansi waku Germany Walter Hermann Schottky., popeza imapanga chotchinga cha Schottky (metal-semiconductor kapena MS junction) m'malo mogwiritsa ntchito njira yokhazikika ya semiconductor. Pachifukwa ichi, m'malo ena mudzapeza pansi pa dzina lakuti Schottky barrier diode kapena pamwamba pazitsulo zotchinga.

Chifukwa cha mgwirizanowu, diode iyi ili ndi a kutsika voteji kutsogolo kuposa PN diode, ndipo angagwiritsidwe ntchito pa wailesi pafupipafupi (RF) ndi mkulu-liwiro kusintha ntchito. Komanso, kusiyana kwina ndi silicon PN mphambano diode ndi kuti ali mmene voteji kutsogolo kwa 0.6 kuti 0.75V, pamene Schottky mmodzi ndi 0.15 kuti 0.45V. Kufunika kocheperako kwamagetsi ndiko kumawapangitsa kusintha mwachangu.

Dontholo limatha kusiyanasiyana kuchokera ku diode ya Schottky kupita ku ina, chifukwa zimadalira chitsulo chomwe chimagwiritsidwa ntchito. Kuti mudziwe chomwe chiri, werengani zolemba za wopanga mankhwala.

Kubwereranso ku mutu wa Mgwirizano wa MS, chitsulo nthawi zambiri ndi tungsten, chromium, platinamu, molybdenum, ma silicides ena (odziwika kwambiri chifukwa ndi otsika mtengo, ochuluka komanso amakhala ndi ma conductivity abwino), kapenanso golide, pomwe semiconductor nthawi zambiri amakhala silicon yamtundu wa N, ngakhale palinso zina. kuphatikiza ma semiconductors. Mbali yachitsulo ndi anode, pamene mbali ya semiconductor imagwirizana ndi cathode.

The Schottky diode alibe wosanjikiza kuchepa, ndipo amaikidwa ngati chipangizo cha unipolar semiconductor, osati bipolar monga PNs. Komanso, pakali pano adzakhala chifukwa cha zonyamulira ambiri (ma elekitironi) akungotengeka kupyola mu diode, ndipo monga palibe P-zone, palibe chonyamulira ochepa (mabowo), ndipo pamene n'zosiyana kukondera, diode amachititsa kusiya pafupifupi nthawi yomweyo, kupondereza kutuluka kwa madzi.

Schottky diode ntchito

Kwenikweni Schottky diode ntchito, imatha kuchita m'njira zingapo kutengera polarization:

  • osati polarized: Popanda kukondera, mphambano ya MS (pokhala semiconductor yamtundu wa N), ma elekitironi a band conduction kapena ma elekitironi aulere amasuntha kuchokera ku semiconductor kupita kuchitsulo kuti akhazikitse dziko lofanana. Monga mukudziwira, pamene atomu yopanda ndale ipeza electron imakhala ion yoipa, ndipo ikataya imakhala ion yabwino. Izi zipangitsa kuti maatomu achitsulo akhale ma ion oyipa ndi omwe ali kumbali ya semiconductor kukhala abwino, kukhala madera akuchepa. Popeza chitsulo chili ndi ma elekitironi ambiri aulere, m'lifupi mwake momwe ma elekitironi amasunthira ndi osasamala poyerekeza ndi m'lifupi mkati mwa zone yamtundu wa N. Izi zimabweretsa mphamvu yomangidwa (voltage) kukhala makamaka mu N-zone. voteji ingakhale chotchinga kukumana ndi ma elekitironi mu semiconductor a conduction bandi poyesa kudutsa ku mbali yachitsulo (ochepa ma elekitironi amayenda kuchokera S kuti M). Kuti athetse chotchinga ichi, ma elekitironi aulere amafunikira mphamvu yokulirapo kuposa magetsi omangidwira kapena sipadzakhalanso pano.
  • Kulunjika molunjika: Pamene chomaliza chabwino cha gwero la mphamvu chikugwirizana ndi chitsulo chodutsa (anode) ndi chotsatira choyipa ku semiconductor yamtundu wa N (cathode), diode ya Schottky imapita patsogolo. Izi zimapanga ma elekitironi ambiri aulere mu M ​​ndi S, koma sangathe kuwoloka pokhapokha mphamvu yogwiritsidwa ntchito iposa 0.2v, kuti igonjetse chotchinga chimenecho (voltage yophatikizidwa). Ndiko kuti, madzi akuyenda.
  • Bwezerani kusintha: Pachifukwa ichi, choyimira cholakwika cha magetsi chidzalumikizidwa ndi mbali yachitsulo (anode), ndi yabwino kwa semiconductor ya N-mtundu (cathode). Zikatero, m'lifupi mwa chigawo chochepetsera kumawonjezeka ndipo kutuluka kwaposachedwa kumadulidwa. Sikuti zonse zapano zimadulidwa, chifukwa pali kutayikira kochepa komwe kumatuluka chifukwa cha ma elekitironi okondwa muzitsulo. Ngati voteji ya reverse bias ikuwonjezeka, mphamvu yamagetsi idzawonjezeka pang'onopang'ono chifukwa cha kufooka kwa chotchinga. Ndipo ngati ifika pamtengo wina, kuwonjezereka kwadzidzidzi kwa magetsi kumachitika, kuswa dera lochepetsera ndikuwononga diode ya Schottky kwamuyaya.

Ubwino ndi kuipa kwa Schottky diode

Monga mwachizolowezi ndi chipangizo chilichonse kapena makina, mumakhala nazo nthawi zonse ubwino ndi kuipa kwake. Pankhani ya Schottky diode ndi awa:

Ubwino wa Schottky Diode

  • Low mphambano capacitance: Mu diode ya PN chigawo chochepetsera chimapangidwa ndi ndalama zosungidwa ndipo pali capacitance. Mu diode ya Schottky milandu iyi ndi yosafunika.
  • Fast reverse recovery time: ndi nthawi yomwe diode imatenga kuti ichoke ku ON (conductive) kupita ku OFF (yopanda-conductive), ndiko kuti, kuthamanga kwachangu. Izi zikugwirizana ndi zomwe tazitchula pamwambapa, chifukwa kuti zidutse kuchokera ku dziko lina kupita ku lina, ndalama zomwe zimasungidwa m'dera la kuchepa ziyenera kuchotsedwa kapena kuchotsedwa, chifukwa zimakhala zochepa mu Schottky, zidzadutsa kuchokera ku gawo lina kupita ku lina mofulumira. .
  • mkulu kachulukidwe panopa: Chotsatira china chazomwe zili pamwambazi ndi chakuti magetsi ang'onoang'ono ndi okwanira kuti apange mphamvu yaikulu chifukwa malo ochepetsera amakhala pafupifupi osasamala.
  • Kutsika kwa voliyumu yakutsogolo kapena voteji yotsika: Ndi otsika poyerekeza ndi wamba PN mphambano diode, nthawi zambiri 0.2v kuti 0.3v, pamene PNs zambiri mozungulira 0.6 kapena 0.7v. Ndiko kuti, magetsi ochepa amafunikira kuti apange kuyenda kwamakono.
  • Kuchita bwino kwambiri: zokhudzana ndi zomwe zili pamwambapa, ndipo izi zikutanthawuzanso kuti kutentha kumachepa m'mabwalo amphamvu kwambiri.
  • Oyenera ma frequency apamwamba: Pokhala wachangu, amatha kugwira ntchito bwino pamapulogalamu a RF.
  • Phokoso lochepa: Schottky diode imapanga phokoso lochepa losafunikira kuposa ma diode wamba.

Zoyipa za Schottky Diode

Poyerekeza ndi ma diode ena a bipolar, diode ya Schottky ili ndi vuto limodzi lodziwika bwino:

  • Machulukidwe apamwamba obwerera: imapanga machulukitsidwe am'mbuyo kuposa PN.

Kusiyana ndi diode ya PN yolumikizira

Kuyerekeza kwa Schottky diode curve

Kuti mudziwe zambiri za zomwe Schottky diode ingathandize pulojekiti yanu, mukhoza kuona graph yapitayi ndi ma curve a PN silicon ndi GaAs diode, ndi mtundu wa Schottky wa semiconductors omwewo. Kusiyana odziwika kwambiri ndi awa:

Chidwi cha Schottky PN Junction Diode
Metal-semiconductor junction mtundu wa N PN semiconductor mphambano.
Kutsika kwamagetsi otsika kutsogolo. Kutsika kwambiri kwamagetsi akutsogolo.
Kutayika kwapang'onopang'ono kuchira komanso nthawi yochira. Kuwonongeka kwakukulu kwapang'onopang'ono ndikubwezeretsanso nthawi yochira.
Ndi unipolar. Iye ndi bipolar.
Pakalipano amapangidwa kokha ndi kayendedwe ka ma electron. Panopa amapangidwa ndi kayendedwe ka mabowo ndi ma electron.
Kusintha liwiro. Kusintha pang'onopang'ono.

Kugwiritsa ntchito kotheka kwa diode ya Schottky

Schottky diode ndizofala kwambiri pazinthu zambiri zamagetsi. Makhalidwe awo apadera ndi ubwino kuposa ma diode ena amatanthauza kuti ali nawo mapulogalamu osiyanasiyana monga:

  • Kwa ma circuits a RF.
  • monga mphamvu rectifiers.
  • Kwa mitundu yosiyanasiyana yamagetsi.
  • Mu machitidwe ndi mapanelo dzuwa kuwateteza n'zosiyana kulipiritsa mabatire amene nthawi zambiri chikugwirizana.
  • Ndi zina zambiri ...

Ndipo chifukwa cha ichi, iwo akhoza kuperekedwa onse paokha, monga ophatikizidwa mu ICs.

komwe mungagule ma diode awa

Ngati mukufuna ma Schottky diode pama projekiti anu kapena kuyamba kuyesa nawo ndikumvetsetsa bwino, mutha kuwapeza m'masitolo apadera apadera amagetsi, komanso ku Amazon. Ndi izi malangizo ena:


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