Diodes yog ib qho ntawm cov khoom siv semiconductor feem ntau siv hauv cov khoom siv hluav taws xob niaj hnub no.
Lawv kuj yog ib tug ntawm cov feem ntau to taub yuam kev.
Tom qab tag nrho, diodes feem ntau hu ua "ib-txoj kev rooj vag" lossis "nyeem lub rooj vag" thaum tham txog lawv txoj haujlwm.
Thaum lub diode raug txiav tawm ntawm qhov hluav taws xob sab nraud, cov hluav taws xob hauv nws nkag mus rau hauv thiab tsis tuaj yeem khiav rov qab.
Yog li ntawd, qhov no ntxiab tam sim no ntws los ntawm qhov tshwj xeeb ntawm lub voj voog sab hauv uas tsis muaj txoj hauv kev tawm tsuas yog los ntawm lub davhlau ya nyob twg los yog rov qab txoj kev (yog li lub npe dhau los ntawm lub npe).
Txawm li cas los xij, thaum diodes tau hais ua ke nrog cov khoom siv hluav taws xob lawv tuaj yeem ua rau tsis meej pem.
Qhov no yog vim muaj coob tus neeg xav txog lawv li cov khoom siv linear - thaum qhov tseeb lawv muaj tus cwj pwm tsis zoo uas ua rau lawv muaj ntau yam ntau dua li qhov yooj yim qhib / tawm.
Ntau npaum li cas lub suab paj nruag muaj ntau yam kev siv dhau ntawm kev ua si sau ntawv, lub diode pab ntau lub hom phiaj tshaj li hloov hluav taws xob tam sim no rau thiab tawm.
Cia peb saib seb diodes ua haujlwm li cas kom koj nkag siab tias lawv tuaj yeem siv li cas thiab cov khoom tshwj xeeb uas lawv muaj uas ua rau lawv muaj txiaj ntsig zoo ntawm cov hluav taws xob hluav taws xob.
Dab tsi yog diode?
Diodes yog ib qho hluav taws xob shunts.
Lub diode yog ib qho hluav taws xob tswj ob txoj kev hloov uas tso cai rau tam sim no ntws mus rau hauv ib qho kev taw qhia tsuas yog nyob rau hauv qee yam mob.
Thaum tam sim no ntws hauv ib qho kev taw qhia los ntawm diode, nws ob lub semiconductor "ntiv tes" txuas ua ke.
Thaum tam sim no ntws mus rau lwm txoj kev, ob tus ntiv tes raug cais tawm ntawm ib leeg thiab tsis muaj qhov ntws tam sim no.
Diodes yog tsim los ntawm ob qho khoom siv semiconducting uas feem ntau tau teeb tsa hauv "sandwich" zam los thaiv cov electrons los ntawm ntws hauv ob qho tib si.
Ib qho me me ntawm tam sim no nyob rau hauv qee qhov xwm txheej tuaj yeem cuam tshuam nws lub zog ntau dhau li cua sov, ua kom cov hluav taws xob ntws los ntawm diode hauv ib qho kev taw qhia - txawm tias qhov hluav taws xob hla lub diode ntau dua li qhov hluav taws xob siv rau sab nraud.
Vim hais tias lub diode lub active cheeb tsam tsuas yog tso cai rau electrons ntws nyob rau hauv ib qho kev taw qhia thaum lub cheeb tsam sab nrauv thaiv lawv los ntawm ntws rov qab, nws yog piav raws li ib tug ib-txoj kev hluav taws xob shunt.
Diodes muaj qhov zoo thiab tsis zoo terminals
Lub diode ob kawg yog sau nrog + thiab - qhia tias nws tsis muaj polarity sab hauv.
Thaum ib qho hluav taws xob siv rau lub diode xaus, qhov no yog hu ua luv-circuit lossis "tsis zoo" kuaj.
Diodes tsis yog polarized zoo li ib txwm polarized hluav taws xob thaiv-qhov kawg yog siv rau kev sim nkaus xwb thiab nruab nrab ntawm lub diode yog nruab nrab ("tsis muaj polarity") thiab txuas nrog cov khoom siv hluav taws xob.
Hauv cov khoom siv hluav taws xob, qhov zoo ntawm lub diode feem ntau yog qhov anode thiab qhov tsis zoo yog lub cathode.
Txawm li cas los xij, lub rooj sib txoos tsis tau teem rau hauv pob zeb.
Hauv qee lub voj voog, lub davhlau ya nyob twg tsis zoo yog lub cathode thiab lub davhlau ya nyob twg zoo yog lub anode.
Piv txwv li, hauv ib qho LED Circuit Court, qhov tsis zoo davhlau ya nyob twg yog lub cathode, tab sis nyob rau hauv lub roj teeb Circuit Court, qhov tsis zoo davhlau ya nyob twg yog lub anode.
Muaj ntau hom diodes
Muaj ntau ntau hom diodes muaj nyob rau hauv cov khoom siv hluav taws xob.
Feem ntau cov diodes yog cov semiconductor ntau yam, tab sis kuj muaj cov rectifiers, photodiodes, thiab transistors uas ua haujlwm zoo li diodes.
Xaiv qhov zoo ntawm cov diode rau ib lub voj voog tshwj xeeb yog qhov tseem ceeb kom tau txais cov txiaj ntsig xav tau.
Qee yam tseem ceeb diode muaj xws li: - Fast Rectifiers: Cov diodes no ua hluav taws xob sai heev, tso cai rau kev siv ntau zaus.
- Txheem Rectifiers: Cov diodes no ua hluav taws xob qeeb dua, tso cai rau kev siv tsawg zaus.
- Schottky Barrier Rectifiers: Cov diodes no muaj ib tug built-in Schottky diode uas tiv thaiv lawv los ntawm kev coj rov qab.
- Photodiodes: Cov khoom siv no hloov lub teeb mus rau hauv hluav taws xob, ua rau lawv muaj txiaj ntsig zoo hauv cov ntawv thov kev paub.
Diodes muaj qhov sib txawv ntawm qhov ntsuas hluav taws xob, cov yam ntxwv, thiab qhov ntsuas hluav taws xob tawg
Txawm hais tias diodes tseem nyob hauv ib txoj kev hluav taws xob shunts, lawv feem ntau muaj qhov hluav taws xob tawg siab heev (ntau dua 1 megavolt) thiab qhov hluav taws xob tawg (tsawg voltage yuav tsum tau pib qhov tawg) uas ua rau lawv haum rau qee hom kev siv.
Cov kev ntsuas no yog nyob ntawm hom diode siv thiab tuaj yeem hloov kho los tsim ntau hom diodes.
Piv txwv li, ib tug ceev rectifier diode muaj ib tug breakdown voltage pib ntawm txog 0.3 volts.
Qhov no txhais tau hais tias yog tias qhov hluav taws xob thoob plaws lub diode qis dua 0.3 volts, lub diode yuav tsis ua thiab Circuit Court yuav nyob twj ywm hauv nws qhov qub.
Yog hais tias lub voj voog sim kos ntau tam sim no thiab qhov hluav taws xob thoob plaws hauv lub voj voog tau nce, lub diode qhov kev sib tawg ntawm qhov hluav taws xob tau ntsib thiab lub diode pib ua tam sim no nyob rau hauv qhov sib txawv.
Diodes tuaj yeem siv rau hauv daim ntawv thov linear lossis nonlinear
Ib qho tshwj xeeb ntawm diodes yog tias lawv tuaj yeem siv rau hauv daim ntawv thov linear lossis nonlinear.
Thaum siv rau hauv daim ntawv thov linear, lub diode yog siv los ua tus hloov.
Hauv lwm lo lus, nws ua tam sim no nyob rau hauv ib qho kev taw qhia nyob ntawm qhov voltage thov rau hauv Circuit Court.
Thaum ib qho hluav taws xob siv thoob plaws hauv ib lub voj voog, cov electrons pib ntws los ntawm lub diode thiab lub zog hluav taws xob.
Lub diode tuaj yeem xav tias yog "ib txoj kev hloov".
Thaum lub zog hluav taws xob, lub diode ua tam sim no, tig lub voj voog.
Thaum tsis muaj hluav taws xob siv thoob plaws hauv Circuit Court, lub diode tsis ua haujlwm, thiab lub zog hluav taws xob raug kaw.
Nyob rau hauv cov ntawv thov nonlinear, lub diode yog siv los ua kom nrov lossis nce qhov amplitude lossis lub zog, ntawm lub teeb liab.
Piv txwv li, yog ib lub voj voog siv lub teeb liab tsawg zaus los tswj ib yam dab tsi (xws li tig lub cev muaj zog rau lossis tawm), lub voj voog nws tus kheej yuav raug hluav taws xob los ntawm lub teeb liab.
Tab sis yog tias lub teeb liab siab txaus (xws li lub suab hu xov tooj lossis suab paj nruag los ntawm lub chaw nres tsheb hauv xov tooj cua), lub diode tuaj yeem siv los ua kom nrov nrov thiab tig lub zog hluav taws xob, tso cai rau nws los tswj cov teeb liab ntau dua.
Yuav Ua Li Cas High Voltage Diodes Ua Haujlwm?
Thaum muaj hluav taws xob siab siv thoob plaws a diode, nws pib coj.
Txawm li cas los xij, vim tias qhov hluav taws xob siab dhau lawm, cov khoom siv hluav taws xob nyob hauv lub diode tsis tuaj yeem tso lawv lub zog kom txaus kom tawg tawm ntawm lawv qhov chaw kaw.
Raws li qhov tshwm sim, lub diode ua haujlwm me ntsis, tab sis tsis txaus rau lub zog hluav taws xob.
Thaum ib qho hluav taws xob tsawg yog siv rau lub rooj vag ntawm ib khub ntawm transistors uas tswj cov hluav taws xob siv nyob rau hauv ib lub voj voog (hu ua ladder circuit), lub teeb liab raug tso cai kom dhau los ntawm kev tsis raug cai.
Txawm li cas los xij, thaum muaj qhov hluav taws xob tsawg dhau ntawm tus ntaiv Circuit Court thiab lub diodes tsis ua tam sim no txaus, lub teeb liab tsis raug tso cai los ntawm thiab lub Circuit Court yog powered.
Qhov no tuaj yeem siv los siv hluav taws xob yooj yim circuits thiab tuaj yeem pab tau rau cov sorters, computers, thiab timers.
Yuav ua li cas xam qhov Voltage Threshold rau Diode
Piv txwv tias koj txuas lub diode rau 12-volt fais fab mov thiab xav paub seb nws puas yuav coj (muab lub zog) ntawm qhov hluav taws xob tsawg.
Qhov sib npaug ntawm kev suav cov hluav taws xob tawg (VOM) ntawm lub tshuab hluav taws xob semiconductor yog raws li hauv qab no: Hauv qhov sib npaug no, "VOH" yog qhov hluav taws xob thoob plaws lub cuab yeej thaum nws tawg, "VOHSC" yog qhov pib voltage ntawm lub diode thaum nws ua, "I" yog tam sim no los ntawm diode, "E" yog qhov hluav taws xob ntawm hluav taws xob hluav taws xob hla lub diode thiab "n" yog tus naj npawb ntawm electrons hauv diode.
Txhawm rau txiav txim siab qhov ntsuas hluav taws xob ntawm lub diode, koj yuav tsum paub qhov tawg ntawm lub diode.
Koj tuaj yeem pom tus nqi no los ntawm kev siv qhov sib npaug saum toj no.
Lub zog tawg ntawm ib txwm silicon pn hlws ris diode yog 1.5 volts.
Qhov no txhais tau hais tias thaum qhov hluav taws xob hla lub diode yog 1.5 volts, lub diode yuav tawg thiab pib ua tam sim no.