Molao-motheo o sebetsang oa mokhoa oa ntlafatso oa mocha oa N-MOSFET

(1) Phello ea taolo ea vGS ho ID le mocha

① Nyeoe ea vGS=0

Ho ka bonoa hore ho na le likhokahano tse peli tsa morao-rao tsa PN lipakeng tsa drain d le mohloli oa mokhoa oa ntlafatso.MOSFET.

Ha motlakase oa heke-source vGS=0, leha motlakase oa drain-source vDS o eketsoa, ​​​​'me ho sa tsotelehe polarity ea vDS, kamehla ho na le pokano ea PN maemong a leeme.Ha ho na mocha o tsamaisang metsi pakeng tsa drain le mohloli, ka hona, ID≈0 ea hona joale ea drain ka nako ena.

② Nyeoe ea vGS>0

Haeba vGS> 0, tšimo ea motlakase e hlahisoa ka har'a SiO2 e sireletsang lera pakeng tsa heke le substrate.Tataiso ea sebaka sa motlakase ke perpendicular tšimong ea motlakase e lebisitsoeng ho tloha hekeng ho ea substrate holim'a semiconductor holim'a metsi.Sebaka sena sa motlakase se leleka masoba mme se hohela lielektrone.Likoti tse lelekang: Likoti tse karolong e ka tlas'a mofuta oa P haufi le heke lia lelekoa, 'me li siea li-ion tse amohelang tse sa sisinyeheng (negative ions) ho etsa lera la ho fokotseha.Li-electrone tse hohelang: Li-electrone (lijari tse nyenyane) tse karolong e ka tlaase ea mofuta oa P li hoheloa holim'a karolo e ka tlaase.

(2) Ho thehoa ha mocha oa conductive:

Ha boleng ba vGS bo le nyane mme bokhoni ba ho hohela li-elektronike ha bo matla, ho ntse ho se na mocha oa conductive pakeng tsa drain le mohloli.Ha li-vGS li ntse li eketseha, li-electrone tse ngata li khahloa ke karolo e ka holimo ea P substrate.Ha vGS e fihla boleng bo itseng, li-electrone tsena li etsa mofuta oa N-mofuta o mosesaane holim'a substrate ea P haufi le heke 'me e hokahane le libaka tse peli tsa N +, ho etsa mocha oa conductive oa mofuta oa N pakeng tsa drain le mohloli.Mofuta oa eona oa conductivity o fapane le oa P substrate, kahoo o boetse o bitsoa "inversion layer".E kholoanyane vGS ke, matla a matla a motlakase a sebetsang holim'a semiconductor holim'a metsi ke, li-electrone tse ngata li hoheloa holim'a karoloana ea P, ho feta mocha oa conductive, 'me khanyetso ea mocha e nyenyane haholo.Matla a matla a heke ha mocha a qala ho theha a bitsoa "turn-on voltage", e emeloang ke VT.