Koj paub ntau npaum li cas txog cov hauv paus ntawm Diodes? (Part 1)

Diodeyog ib qho ntawm cov khoom siv semiconductor thaum ntxov, thiab nws daim ntawv thov yog dav heev. Tshwj xeeb tshaj yog nyob rau hauv ntau yam hluav taws xob circuits, kev siv diodes thiab resistors, capacitors, inductors thiab lwm yam khoom yog tsim nyog txuas rau daim ntawv circuits nrog txawv zog, uas muaj peev xwm ua tau ib tug ntau yam ntawm functions xws li AC rectification, modulation teeb liab nrhiav kom tau, limiting thiab clamping, thiab kev tswj hwm ntawm lub zog hluav taws xob voltage.

Txawm hais tias nws yog nyob rau hauv cov xov tooj cua sib xws lossis hauv lwm cov khoom siv hluav taws xob hauv tsev lossis kev tswj xyuas kev lag luam, cov kab ntawm diodes tuaj yeem pom.

Cov yam ntxwv thiab kev siv ntawm diodes

Yuav luag tag nrho cov hluav taws xob hluav taws xob, cov khoom siv hluav taws xob semiconductor tau siv, nws ua lub luag haujlwm tseem ceeb hauv ntau lub circuits, nws yog ib qho ntawm cov khoom siv semiconductor thaum ntxov, thiab nws daim ntawv thov kuj dav heev.

Daim ntawv thov Diode

1. Rectifier diode

Los ntawm kev siv lub diode unidirectional conductivity, alternating tam sim no yuav hloov mus rau hauv pulsating ncaj tam sim no nyob rau hauv ib qho kev taw qhia.

2. Hloov cov khoom siv

Nyob rau hauv qhov kev txiav txim ntawm pem hauv ntej voltage, qhov tsis kam ntawm lub diode yog heev me me thiab nws yog nyob rau hauv lub xeev, uas yog sib npaug rau ib tug switched-on hloov. Nyob rau hauv qhov kev txiav txim ntawm qhov rov qab voltage, qhov tsis kam yog loj heev thiab nyob rau hauv lub xeev txiav, zoo li ib tug disconnected mus. Siv cov yam ntxwv hloov pauv ntawm diodes, ntau yam logic circuits tuaj yeem tsim.

3. Cov ntsiab lus txwv

Tom qab lub diode tau hloov mus, nws qhov kev poob qis rau pem hauv ntej tseem tsis hloov pauv ({{0}}.7V rau lub raj silicon thiab 0.3V rau lub raj germanium). Los ntawm kev siv cov yam ntxwv no, lub teeb liab amplitude tuaj yeem raug txwv rau qee yam raws li qhov txwv hauv Circuit Court.

4. Relay diode

Nws plays lub luag hauj lwm relay nyob rau hauv inductive loads xws li inductance thiab relay ntawm switching fais fab mov.

5. Kev kuaj xyuas diode

Nws ua raws li ib tug ntes nyob rau hauv xov tooj cua.

6. Varactor diode

Siv nyob rau hauv high-frequency taub hau ntawm TV.

diodes ua haujlwm li cas?

Crystal diode yog pn hlws ris tsim los ntawm P-hom semiconductor thiab N-hom semiconductor, uas tsim ib qho chaw them nqi txheej ntawm ob sab ntawm nws qhov kev sib tshuam thiab muaj qhov tsim hluav taws xob rau tus kheej. Thaum tsis muaj qhov hluav taws xob siv hluav taws xob, qhov sib txawv tam sim no tshwm sim los ntawm qhov sib txawv ntawm cov cab kuj concentration ntawm ob sab ntawm pn hlws ris thiab cov drift tam sim no los ntawm tus kheej-tsim hluav taws xob teb yog sib npaug thiab hauv hluav taws xob sib npaug. Thaum muaj ib qho kev tsis ncaj ncees rau pem hauv ntej, kev sib nrig sib tsuj ntawm sab nraud hluav taws xob teb thiab qhov hluav taws xob tsim nws tus kheej ua rau cov neeg nqa khoom nthuav tawm tam sim no thiab ua rau lub zog tam sim no. Thaum muaj qhov hluav taws xob thim rov qab sab nraud, qhov hluav taws xob sab nraud thiab qhov chaw hluav taws xob tsim nws tus kheej tau ntxiv dag zog ntxiv, ua rau qhov rov qab saturation tam sim no I0 uas yog ywj pheej ntawm qhov rov qab tsis zoo voltage nyob rau hauv qee qhov rov qab voltage ntau. Thaum cov ntaub ntawv rov qab siv hluav taws xob siab rau qee qhov, lub zog hluav taws xob hauv pn junction qhov chaw them nqi nce mus txog tus nqi tseem ceeb, ua rau cov txheej txheem thauj khoom ob npaug, ntau lub qhov hluav taws xob sib txuas, ua rau muaj txiaj ntsig loj ntawm kev thim rov qab. tawg tam sim no, hu ua qhov tawg tshwm sim ntawm diodes.

Hom ntawm diode

Muaj ntau hom diodes, raws li cov khoom siv semiconductor siv, tuaj yeem muab faib ua germanium diodes (Ge tubes) thiab silicon diodes (Si raj). Raws li nws cov kev siv sib txawv, nws tuaj yeem muab faib ua kev tshawb nrhiav diode, rectifier diode, voltage regulator diode, switching diode, cais diode, Schottky diode, lub teeb emitting diode thiab hais txog. Raws li cov qauv tseem ceeb, nws tuaj yeem muab faib ua cov ntsiab lus sib cuag diode, qhov chaw sib cuag diode thiab dav hlau diode. Point-contact diode yog ib tug nyias nyias hlau hlau nias rau ntawm qhov chaw ntawm ib tug du semiconductor nti, los ntawm ib tug mem tes tam sim no, thiaj li hais tias ib kawg ntawm cov hlau thiab cov nti nrees sintered ua ke los tsim ib tug "PN hlws ris". Vim tias nws yog qhov chaw sib cuag, tsuas yog ib qho me me tam sim no raug tso cai hla dhau (tsis ntau tshaj li ob peb kaum ntawm MA), uas yog tsim rau high-frequency me me tam sim no circuits, xws li xov tooj cua nrhiav. Qhov "PN hlws ris" thaj tsam ntawm lub ntsej muag-hu rau diode yog qhov loj, tso cai rau kev nkag mus ntawm cov tam sim no loj (ntau amps rau kaum tawm amps), uas yog siv rau hauv "rectification" Circuit Court uas hloov pauv tam sim no mus rau tam sim no ncaj qha. Planar diode yog ib qho tshwj xeeb silicon diode, uas tuaj yeem tsis tsuas yog dhau tam sim no loj, tab sis kuj muaj kev ruaj khov thiab txhim khu kev qha, thiab feem ntau yog siv rau hauv kev hloov pauv, mem tes thiab lub zog ntau zaus.

Diode daim ntawv thov Circuit Court

1. Diode yooj yim DC voltage regulator Circuit Court

Diode yooj yim voltage regulator Circuit Court yog tsuas yog siv nyob rau hauv tej lub zos DC voltage mov Circuit Court, vim hais tias lub Circuit Court yog yooj yim, tsis muaj nqi, yog li nws yog dav siv.

Nyob rau hauv lub diode yooj yim voltage regulator Circuit Court, lub ntsiab siv ntawm lub diode raj siab poob yog yeej tsis hloov.

Lub raj siab poob cov yam ntxwv ntawm lub diode: lub raj siab poob yog qhov pib tsis hloov tom qab lub diode hloov, thiab lub raj siab poob yog li ntawm {{0}}}.6V rau silicon diode thiab txog 0.2V rau lub germanium diode.

2. Diode kub them nyiaj Circuit Court

Nws paub zoo tias PN kev sib tshuam muaj qhov siab poob ntawm li {{0}}}.6V (xa mus rau silicon PN hlws ris) tom qab kev ua haujlwm, thiab PN hlws ris kuj muaj qhov kub thiab txias: Lub siab poob ntawm ob qho tag nrho ntawm PN hlws ris txo qis me ntsis nrog qhov nce ntawm qhov kub thiab txias, thiab qhov kub siab dua, qhov ntau dua qhov txo. Tau kawg, tus nqi ntawm qhov kev poob qis ntawm ob qho kawg ntawm PN kev sib tshuam yog qhov me me rau 0.6V, uas tuaj yeem siv los tsim qhov kub thiab txias Circuit Court.

Cov ntaub ntawv tiv tauj:

Yog tias koj muaj lus nug, thov hu rau peb. Txawm peb cov neeg muas zaub nyob qhov twg thiab peb cov kev xav tau yog dab tsi, peb yuav ua raws li peb lub hom phiaj los muab peb cov neeg siv khoom zoo, tus nqi qis, thiab kev pabcuam zoo tshaj plaws.