Menene PMOSFET, ka sani?

I. Tsarin asali da ka'idar aiki

1. Tsarin asali

PMOSFETs suna da n-type substrates da p-tashoshi, kuma tsarin su ya ƙunshi ƙofar (G), tushen (S) da magudanar ruwa (D). A kan nau'in silicon substrate, akwai yankuna P+ guda biyu waɗanda ke zama tushen tushe da magudanar ruwa, bi da bi, kuma an haɗa su da juna ta hanyar p-tashar. Ƙofar tana sama da tashar kuma an keɓe shi daga tashar ta wani Layer oxide insulating Layer.

2. Ka'idodin aiki

PMOSFETs suna aiki daidai da NMOSFETs, amma tare da akasin nau'in masu ɗaukar kaya. A cikin PMOSFET, manyan masu ɗaukar hoto sune ramuka. Lokacin da aka yi amfani da wutar lantarki mara kyau a ƙofar kofa game da tushen, ana samun nau'in p-type inverse Layer akan saman siliki na nau'in n a ƙarƙashin ƙofar, wanda ke aiki a matsayin rami mai haɗa tushen da magudanar ruwa. Canza wutar lantarki na ƙofar yana canza girman ramuka a cikin tashar, ta haka ne ke sarrafa tasirin tashar. Lokacin da ƙarfin wutar lantarki ya yi ƙasa sosai, ƙananan ramuka a cikin tashar ya kai matakin isa don ba da damar gudanarwa tsakanin tushen da magudanar ruwa; akasin haka, tashar ta yanke.

II. Halaye da aikace-aikace

1. Halaye

Ƙananan Motsi: P-tashar MOS transistor suna da ƙananan motsi na ramuka, don haka transconductance na PMOS transistor ya yi ƙasa da na NMOS transistor a ƙarƙashin wannan geometry da ƙarfin aiki.

Ya dace da ƙananan sauri, ƙananan aikace-aikace: Saboda ƙananan motsi, PMOS hadedde da'irori sun fi dacewa da aikace-aikace a cikin ƙananan sauri, ƙananan ƙananan wurare.

Sharuɗɗan gudanarwa: Yanayin gudanarwa na PMOSFETs sun saba wa NMOSFETs, suna buƙatar ƙarfin wutar lantarki ƙasa da ƙarfin tushen.

1. Aikace-aikace

Canjin Babban Side: PMOSFETs yawanci ana amfani da su a cikin manyan juzu'i na jujjuyawar gefe inda aka haɗa tushen zuwa ingantaccen wadata kuma an haɗa magudanar zuwa ƙarshen ƙarshen kaya. Lokacin da PMOSFET ke gudanarwa, yana haɗa ƙarshen ƙarshen kaya zuwa ingantaccen wadata, ƙyale halin yanzu ya gudana ta cikin kaya. Wannan tsari ya zama ruwan dare a wurare kamar sarrafa wutar lantarki da tuƙi.

Juyawa Kariya: Hakanan za'a iya amfani da PMOSFETs a cikin da'irar kariyar baya don hana lalacewar da'irar da ke haifar da juyar da wutar lantarki ko ɗaukar koma baya na yanzu.

III. Zane da la'akari

1. KWANKWASIYYA NA GATE

Lokacin zayyana da'irori na PMOSFET, ana buƙatar daidaitaccen sarrafa wutar lantarki don tabbatar da aiki mai kyau. Tunda yanayin tafiyar da PMOSFETs ya saba wa na NMOSFETs, ana buƙatar kulawa da polarity da girman ƙarfin wutar ƙofa.

2. Load dangane

Lokacin haɗa kaya, ana buƙatar kulawa da polarity na kaya don tabbatar da cewa halin yanzu yana gudana daidai ta hanyar PMOSFET, da tasirin nauyin akan aikin PMOSFET, kamar raguwar wutar lantarki, amfani da wutar lantarki, da sauransu. , kuma yana bukatar a yi la'akari.

3. kwanciyar hankali yanayin zafi

Ayyukan PMOSFET suna da tasiri sosai ta hanyar zafin jiki, don haka ana buƙatar la'akari da tasirin zafin jiki akan ayyukan PMOSFET yayin zayyana da'irori, kuma ana buƙatar ɗaukar matakan da suka dace don inganta yanayin zafi na da'irori.

4. Kariya kewaye

Don hana PMOSFETs daga lalacewa ta hanyar wuce gona da iri yayin aiki, ana buƙatar shigar da da'irar kariya kamar kariya ta wuce gona da iri da kariyar ƙarfin wuta a cikin kewaye. Wadannan da'irori na kariya na iya kare PMOSFET da kyau da kuma tsawaita rayuwar sabis.

A taƙaice, PMOSFET nau'in MOSFET ne tare da tsari na musamman da ƙa'idar aiki. Ƙarƙashin motsinsa da dacewa don ƙananan sauri, ƙananan ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun ƙayyadaddun fa'ida. Lokacin zayyana da'irori na PMOSFET, ana buƙatar kulawa da kula da wutar lantarki na ƙofar ƙofar, haɗin kaya, kwanciyar hankali na zafin jiki da da'irar kariya don tabbatar da aiki mai kyau da amincin da'ira.