Yintoni i-PMOSFET, uyazi?

I. Isakhiwo esisisiseko kunye nomgaqo wokusebenza

1. Isakhiwo esisisiseko

Ii-PMOSFET zinee-n-type substrates kunye ne-p-channels, kwaye ulwakhiwo lwazo ikakhulu lubandakanya isango (G), umthombo (S) kunye nomsele (D). Kwi-n-type ye-silicon substrate, kukho imimandla emibini ye-P+ esebenza njengomthombo kunye ne-drain, ngokulandelelana, kwaye idityaniswe enye kwenye nge-p-channel. Isango libekwe ngaphezu komjelo kwaye lihlukaniswe kumjelo nge-metal oxide insulating layer.

2. Imigaqo yokusebenza

Ii-PMOSFET zisebenza ngokufanayo kwii-NMOSFET, kodwa ngohlobo oluchaseneyo lwabathwali. Kwi-PMOSFET, abathwali abaphambili yimingxuma. Xa i-voltage engafanelekanga isetyenziswe kwisango ngokubhekiselele kumthombo, i-p-type inverse layer yenziwe phezu kwendawo ye-silicon ephantsi kwesango, esebenza njengomsele odibanisa umthombo kunye ne-drain. Ukutshintsha i-voltage yesango kutshintsha ukuxinana kwemingxunya kwitshaneli, ngaloo ndlela ilawula ukuhanjiswa komjelo. Xa i-voltage yesango iphantsi ngokwaneleyo, ukuxinana kwemingxuma kwitshaneli ifikelela kwinqanaba eliphezulu ngokwaneleyo ukuvumela ukuqhuba phakathi komthombo kunye ne-drain; ngokuchaseneyo, umjelo uyanqumla.

II. Iimpawu kunye nokusetyenziswa

1. Iimpawu

Ukuhamba okuPhantsi: I-P-channel MOS transistors ine-mobility ephantsi yomngxuma, ngoko ke i-transconductance ye-PMOS transistors incinci kune-NMOS transistors phantsi kwejometri efanayo kunye ne-voltage yokusebenza.

Ifanelekile kwi-low-speed, i-low-frequency applications: Ngenxa yokuhamba okuphantsi, iisekethe ezidibeneyo ze-PMOS zifanelekile ngakumbi kwizicelo kwiindawo eziphantsi, eziphantsi.

Iimeko zokuqhuba: Iimeko zokuqhutywa kwee-PMOSFET zichasene ne-NMOSFETs, zifuna amandla ombane esango asezantsi kunombane womthombo.

1. Usetyenziso

Ukutshintsha kwecala eliphakamileyo: I-PMOSFETs idla ngokusetyenziswa kuhlengahlengiso oluphezulu lwecala apho umthombo uqhagamshelwe kunikezelo olulungileyo kwaye idreyini idityaniswe nesiphelo esihle somthwalo. Xa i-PMOSFET iqhuba, idibanisa isiphelo esihle somthwalo kwi-positive supply, ivumela i-current ukuba ihambe ngomthwalo. Olu lungelelwaniso luxhaphake kakhulu kwiindawo ezifana nolawulo lwamandla kunye neemoto zokuqhuba.

IiSekethe zoKhuseleko lokuReverse: I-PMOSFETs inokusetyenziswa kwakhona kwiisekethe zokukhusela umva ukukhusela umonakalo kwisekethe ebangelwa ukunikezelwa kwamandla okubuyisela umva okanye ukulayisha umva kwangoku.

III. Uyilo kunye nokuqwalaselwa

1. ULAWULO LWESANGO LEVOTI

Xa uyila iisekethe ze-PMOSFET, ulawulo oluchanekileyo lombane wesango luyafuneka ukuze kuqinisekiswe ukusebenza ngokufanelekileyo. Kuba iimeko zokuqhutywa kwee-PMOSFET zichasene nezo ze-NMOSFETs, ingqwalasela kufuneka ihlawulwe kwi-polarity kunye nobukhulu bamandla ombane wesango.

2. Uxhulumaniso lomthwalo

Xa udibanisa umthwalo, ingqwalasela kufuneka ihlawulwe kwi-polarity yomthwalo ukuqinisekisa ukuba ngoku ihamba ngokuchanekileyo nge-PMOSFET, kunye nomphumo womthwalo ekusebenzeni kwe-PMOSFET, njengokuhla kwamandla ombane, ukusetyenziswa kwamandla, njl. , nayo kufuneka iqwalaselwe.

3. Uzinzo lobushushu

Ukusebenza kwee-PMOSFET kuchatshazelwa kakhulu liqondo lobushushu, ngoko ke ifuthe lobushushu ekusebenzeni kwe-PMOSFETs kufuneka lithathelwe ingqalelo xa kuyilwa iisekethe, kwaye kufuneka kuthathwe amanyathelo ahambelanayo ukuze kuphuculwe uzinzo lobushushu beesekethe.

4. Iisekethe zokhuseleko

Ukuze kuthintelwe i-PMOSFETs ukuba yonakaliswe yi-overcurrent kunye ne-overvoltage ngexesha lokusebenza, iisekethe zokukhusela ezifana nokukhuselwa kwe-overcurrent kunye nokukhuselwa kwe-overvoltage kufuneka zifakwe kwisekethe. Ezi zijikelezo zokukhusela zinokukhusela ngokufanelekileyo i-PMOSFET kwaye zandise ubomi bayo benkonzo.

Isishwankathelo, i-PMOSFET luhlobo lwe-MOSFET enolwakhiwo olukhethekileyo kunye nomgaqo wokusebenza. Ukuhamba kwayo okuphantsi kunye nokufaneleka kwi-low-speed-low-frequency applications yenza ukuba isebenze ngokubanzi kwiinkalo ezithile. Xa uyila iisekethe ze-PMOSFET, ingqwalasela kufuneka ihlawulwe kulawulo lombane wesango, uxhulumaniso lomthwalo, uzinzo lobushushu kunye neesekethe zokukhusela ukuqinisekisa ukusebenza okufanelekileyo kunye nokuthembeka kwesekethe.