Molao-motheo oa ts'ebetso ea MOSFET ke ofe?

MOSFET (FieldEffect Transistor abbreviation (FET)) sehloohoMOSFET. ka palo e nyane ea bajari ho nka karolo ho conductivity ea mocheso, e tsejoang hape e le transistor ea li-multi-pole junction. E arotsoe e le sesebelisoa sa semi-superconductor se laoloang ke voltage. Khanyetso e teng ea tlhahiso e phahame (10 ^ 8 ~ 10 ^ 9 Ω), lerata le tlase, tšebeliso e tlase ea matla, sebaka se tsitsitseng, ho bonolo ho kopanya, ha ho ketsahalo ea bobeli ea ho senyeha, mosebetsi oa inshorense oa leoatle le leholo le melemo e meng, joale e fetotse bipolar junction transistor le transistor ea matla a mateano a basebetsi ba matla.

Litšobotsi tsa MOSFET

Ea pele: MOSFET ke sesebelisoa sa ho laola motlakase, ka VGS (gate source voltage) ho tseba ID (drain DC);

Ea bobeli:MOSFET'soutput DC e nyane haholo, kahoo ho hanyetsa ha eona ho hoholo haholo.

Tse tharo: e sebelisoa lijari tse seng kae ho tsamaisa mocheso, 'me kahoo e na le tekanyo e ntle ea botsitso;

Tse 'nè: e na le tsela e fokotsehileng ea ho fokotsa motlakase oa li-coefficients tse nyenyane ho feta transistor e na le tsela e fokolitsoeng ea ho fokotsa motlakase oa li-coefficients tse nyenyane;

Ea bohlano: Matla a thibelang mahlaseli a MOSFET;

Tšelela: hobane ha ho na ts'ebetso e fosahetseng ea ho hasana ha batho ba fokolang ho bakoang ke likaroloana tsa lerata tse qhalakaneng, hobane lerata le tlaase.

Molao-motheo oa mosebetsi oa MOSFET

MOSFETmolao-motheo oa mosebetsi polelong e le 'ngoe, ke hore, "drain - source walk through the channel between the ID, with electrode and the channel between the pn constructed into reverse bias electrode voltage to master ID". Ka nepo, boholo ba ID ho pholletsa le potoloho, ke hore, sebaka sa li-channel cross-sectional, ke ka pn junction counter-biased variation, ketsahalo ea lera la ho fokotseha ho atolosa phapang ea ho laola lebaka. Leoatleng le se nang metsi a VGS = 0, katoloso ea lera le bontšitsoeng la phetoho ha e kholo haholo hobane, ho ea ka matla a khoheli a VDS a kenyellelitsoeng pakeng tsa mohloli oa metsi, li-elektronike tse ling tse leoatleng la mohloli li huloa ke drain. , ke hore, ho na le ts'ebetso ea DC ID ho tloha ho drain ho ea mohloling. Lera le leka-lekaneng le atolohang ho tloha hekeng ho ea ho drain e tla theha mofuta oa thibelo ea 'mele oohle oa mocha, ID e tletse. Sheba mokhoa ona e le pinch-off. Sena se supa hore transition layer e thiba mocha kaofela, ha se hore DC e khaotsoe.

Sebakeng sa phetoho, hobane ha ho na ho itsamaisa ha li-electrone le likoti, ka mokhoa oa sebele oa litšobotsi tse sireletsang ho ba teng ha DC ka kakaretso hona joale ho thata ho tsamaea. Leha ho le joalo, matla a khoheli a pakeng tsa drain - mohloli, ka tshebetso, tse peli phetoho lera kopana drain le heke palo tlaase ka ho le letšehali, hobane matla a khoheli a khoheli a hula lielektrone phahameng-lebelo ka lera phetoho. Hobane matla a matla a khoheli a hoholehang ha a fetole botlalo ba sebaka sa ID. Taba ea bobeli, VGS ho boemo bo bobe bo fetoha, e le hore VGS = VGS (e tima), ebe karolo ea phetoho e fetola haholo sebopeho sa ho koahela leoatle lohle. Le matla a khoheli a VDS a eketsoa haholo ho lera la phetoho, matla a khoheli a hulang elektrone sebakeng sa ho hoholeha, hafeela e le haufi le palo ea mohloli oa e khuts'oane haholo kaofela, e leng hore matla a DC e kgonang ho thekesela.