I-conductivity ye-diode

Uphawu olubaluleke kakhulu lwe-diode yi-conductivity yayo ye-unidirectional. Kwisiphaluka, umsinga unokuhamba kuphela kwi-anode ye-diode kwaye uphume kwi-cathode. Oku kulandelayo luvavanyo olulula lokubonisa iimpawu zangaphambili kunye nezasemva zediode.

1. Iimpawu ezintle.

Kwiisekethe ze-elektroniki, ukuba i-anode ye-diode ixhunywe kwisiphelo esiphezulu esinamandla kwaye i-electrode engafanelekanga idibaniswe nesiphelo esiphantsi, i-diode iya kuvulwa. Le ndlela yokudibanisa ibizwa ngokuba yi-bias yangaphambili. Kufuneka kuqatshelwe ukuba xa i-voltage yangaphambili isetyenziswe kuzo zombini iziphelo zediode incinci kakhulu, i-diode ayinakuvulwa, kwaye i-front current ehamba nge-diode ibuthathaka kakhulu. Kuphela xa i-voltage yangaphambili ifikelela kwixabiso elithile (eli xabiso libizwa ngokuthi “i-voltage ye-threshold”, ityhubhu ye-germanium malunga ne-0.2V, kunye ne-silicon tube malunga ne-0.6V), i-diode inokuvulwa ngokuthe ngqo. Emva kokukhanyisa, i-voltage kwi-diode ihlala ingatshintshi (ityhubhu ye-germanium malunga ne-0.3V, i-silicon tube malunga ne-0.7V), ebizwa ngokuba “yi-voltage yangaphambili” ye-diode.

2. Iimpawu ezibuyela umva.

Kwisekethe ye-elektroniki, i-anode ye-diode ixhunywe kwi-low-potential end, kwaye i-electrode engafanelekanga ixhunywe ekupheleni okuphezulu. Ngeli xesha, phantse akukho nto ikhoyo ihamba kwi-diode, kwaye i-diode ikwimeko evaliweyo. Le ndlela yokudibanisa ibizwa ngokuba yi-reverse bias. Xa i-diode i-reverse-biased, kuya kubakho umbane obuthathaka ojikelezayo ohamba nge-diode, ebizwa ngokuba yi-leakage current. Xa i-voltage ye-reverse kwi-diode inyuka kwixabiso elithile, i-current current iya kunyuka ngokukhawuleza, kwaye i-diode iya kulahlekelwa yi-conductivity yayo ye-unidirectional. Le meko ibizwa ngokuba yi-diode breakdown.