Lub conductivity ntawm diode

Qhov tseem ceeb tshaj plaws yam ntxwv ntawm lub diode yog nws unidirectional conductivity. Nyob rau hauv ib lub voj voog, tam sim no tsuas yog ntws los ntawm lub anode ntawm diode thiab ntws tawm ntawm cathode. Cov hauv qab no yog ib qho kev sim yooj yim los qhia txog cov yam ntxwv tom ntej thiab thim rov qab ntawm lub diode.

1. Cov yam ntxwv zoo.

Hauv cov hluav taws xob hluav taws xob, yog tias lub anode ntawm diode txuas nrog lub siab muaj peev xwm kawg thiab qhov tsis zoo electrode txuas nrog qhov kawg uas tsis muaj peev xwm kawg, lub diode yuav qhib. Txoj kev sib txuas no yog hu ua forward bias. Nws yuav tsum raug sau tseg tias thaum qhov hluav taws xob rau pem hauv ntej siv rau ob qhov kawg ntawm diode tsawg heev, lub diode tseem tsis tuaj yeem qhib, thiab cov tam sim no ntws los ntawm lub diode tsis muaj zog heev. Tsuas yog thaum qhov hluav taws xob rau pem hauv ntej nce mus txog ib qho nqi (tus nqi no hu ua “qhov pib voltage”, lub germanium raj yog hais txog 0.2V, thiab lub raj silicon yog li ntawm 0.6V), lub diode tuaj yeem tig ncaj qha. Tom qab tig rau, qhov hluav taws xob hla lub diode tseem tsis hloov pauv (lub raj germanium yog li 0.3V, lub raj silicon yog li 0.7V), uas yog hu ua “forward voltage poob” ntawm lub diode.

2. Rov qab yam ntxwv.

Nyob rau hauv ib qho hluav taws xob Circuit Court, lub anode ntawm diode txuas nrog rau qhov kawg-muaj peev xwm kawg, thiab cov hluav taws xob tsis zoo txuas nrog rau qhov kawg-muaj peev xwm kawg. Lub sijhawm no, yuav luag tsis muaj tam sim no ntws hauv lub diode, thiab lub diode nyob rau hauv lub xeev tawm. Txoj kev sib txuas no yog hu ua thim rov qab. Thaum lub diode rov qab-biased, tseem yuav muaj qhov tsis muaj zog rov qab tam sim no ntws los ntawm diode, uas yog hu ua leakage tam sim no. Thaum qhov hluav taws xob rov qab hla lub diode nce mus rau qee tus nqi, qhov rov qab tam sim no yuav nce siab, thiab lub diode yuav poob nws qhov kev coj ua tsis ncaj. Lub xeev no hu ua diode breakdown.