Diode tawg yam ntxwv

Thaum qhov hluav taws xob rov qab thov dua ib qho nqi, qhov rov qab tam sim no yuav nce sai, uas yog hu ua hluav taws xob tawg. Qhov hluav taws xob tseem ceeb uas ua rau hluav taws xob tawg yog hu ua diode thim rov qab tawg hluav taws xob. Lub diode poob unidirectional conductivity thaum hluav taws xob tawg. Yog hais tias lub diode tsis overheat vim hluav taws xob tawg, lub unidirectional conductivity yuav tsis tas yuav raug puas tsuaj mus tas li, thiab nws cov kev ua tau zoo tuaj yeem rov qab los tom qab tshem tawm qhov hluav taws xob, txwv tsis pub lub diode yuav puas. Yog li ntawd, qhov rov qab voltage thov los ntawm lub diode yuav tsum tau zam thaum siv.

Raws li cov txheej txheem, thim rov qab tuaj yeem muab faib ua Zener kev puas tsuaj thiab avalanche tawg. Nyob rau hauv cov ntaub ntawv ntawm siab doping concentration, vim qhov me me dav ntawm lub barrier cheeb tsam thiab lub loj rov qab voltage, covalent daim ntawv cog lus qauv nyob rau hauv lub barrier cheeb tsam raug puas tsuaj, lub valence electrons raug tso tawm los ntawm covalent daim ntawv cog lus, thiab electron-qhov khub yog. tsim tawm. , ua rau muaj kev nce ntxiv hauv tam sim no, qhov kev tawg no hu ua Zener breakdown. Yog tias qhov doping concentration tsawg, qhov dav ntawm thaj tsam barrier yog dav, thiab Zener tawg tsis yooj yim tshwm sim.

Lwm hom kev tawg yog avalanche tawg. Thaum qhov hluav taws xob thim rov qab nce mus rau tus nqi loj dua, daim ntawv thov hluav taws xob nrawm nrawm nrawm nrawm, kom nws sib tsoo nrog cov valence electrons hauv covalent daim ntawv cog lus, knocks lub valence electrons tawm ntawm covalent daim ntawv cog lus, thiab tsim tshiab electron-qhov khub. . Cov khoom siv hluav taws xob tshiab-lub qhov yog nrawm los ntawm lub teb hluav taws xob thiab tom qab ntawd tshem tawm lwm cov hluav taws xob valence, thiab cov cab kuj nce hauv qhov avalanche, uas ua rau muaj kev nce ntxiv hauv tam sim no. Qhov kev tawg no yog hu ua avalanche breakdown. Txawm hais tias qhov tawg, yog tias nws qhov tam sim no tsis txwv, nws yuav ua rau muaj kev puas tsuaj mus tas li rau PN kev sib tshuam.