Yini i-PMOSFET, uyazi?

I. Isakhiwo esiyisisekelo kanye nesimiso sokusebenza

1. Isakhiwo esiyisisekelo

Ama-PMOSFET anama-substrates ohlobo lwe-n kanye namashaneli e-p, futhi ukwakheka kwawo ikakhulukazi kuhlanganisa isango (G), umthombo (S) kanye ne-drain (D). Ku-n-type silicon substrate, kunezifunda ezimbili ze-P+ ezisebenza njengomthombo nokukhipha amanzi, ngokulandelana, futhi zixhunywe komunye nomunye nge-p-channel. Isango litholakala ngaphezu kwesiteshi futhi lihlukanisiwe nesiteshi ngongqimba lwe-metal oxide insulating.

2. Izimiso zokusebenza

Ama-PMOSFET asebenza ngokufanayo nama-NMOSFET, kodwa ngohlobo oluphambene lwabathwali. Ku-PMOSFET, abathwali abakhulu yizimbobo. Uma i-voltage engalungile isetshenziswa esangweni ngokuphathelene nomthombo, ungqimba oluphambene nohlobo lwe-p luyakhiwa ebusweni be-silicon yohlobo lwe-n ngaphansi kwesango, elisebenza njengomsele oxhuma umthombo nokukhipha amanzi. Ukushintsha i-voltage yesango kushintsha ukuminyana kwezimbobo esiteshini, ngaleyo ndlela kulawula ukuhamba kwesiteshi. Lapho i-voltage yesango iphansi ngokwanele, ukuminyana kwezimbobo esiteshini kufinyelela ezingeni eliphezulu ngokwanele ukuvumela ukuqhutshwa phakathi komthombo nokukhipha; ngokuphambene, isiteshi siyanqamula.

II. Izici kanye nezicelo

1. Izici

Ukuhamba Okuphansi: Ama-transistors e-MOS wesiteshi se-P anokunyakaza kwembobo ephansi, ngakho-ke ukudluliswa kwama-PMOS transistors kuncane kunalokho kwama-NMOS transistors ngaphansi kwejometri efanayo kanye ne-voltage yokusebenza.

Ifanele izinhlelo zokusebenza zejubane eliphansi, imvamisa ephansi: Ngenxa yokuhamba okuphansi, ama-circuits ahlanganisiwe e-PMOS afaneleka kakhulu izinhlelo zokusebenza ezindaweni ezinejubane eliphansi, izindawo eziphansi.

Izimo zokuqhuba: Izimo zokuqhuba zama-PMOSFET ziphambene nama-NMOSFET, zidinga i-voltage yesango ephansi kune-voltage yomthombo.

 

1. Izinhlelo zokusebenza

Ukushintsha Uhlangothi Oluphezulu: Ama-PMOSFET ngokuvamile asetshenziswa ekucushweni kokushintsha ohlangothini oluphezulu lapho umthombo uxhumeke ekunikezeni okuhle futhi umsele uxhumeke ekugcineni komthwalo. Lapho i-PMOSFET iqhuba, ixhuma isiphetho esihle somthwalo kumphakeli omuhle, okuvumela okwamanje ukuthi kugeleze phakathi komthwalo. Lokhu kulungiselelwa kuvame kakhulu ezindaweni ezifana nokuphathwa kwamandla kanye namadrayivu ezimoto.

Izifunda Zokuvikela Okuhlehliswayo: Ama-PMOSFET angasetshenziswa futhi kumasekhethi okuvikela ahlehlayo ukuze avimbele ukulimala kwesekethe okubangelwa ukunikezwa kwamandla okuhlanekezela noma ukulayisha ukubuyela emuva kwamanje.

III. Ukuklama nokucatshangelwa

1. UKULAWULWA KWAMAVOTI ESANGO

Lapho uklama amasekethe e-PMOSFET, ukulawulwa okunembile kwe-voltage yesango kuyadingeka ukuze kuqinisekiswe ukusebenza kahle. Njengoba izimo zokuqhuba zama-PMOSFET ziphambene nalezo zama-NMOSFET, kudinga ukunakwa ku-polarity nobukhulu bamandla kagesi wesango.

2. Layisha uxhumano

Lapho uxhuma umthwalo, ukunakwa kudingeka kukhokhwe ku-polarity yomthwalo ukuze kuqinisekiswe ukuthi okwamanje kugeleza ngendlela efanele nge-PMOSFET, kanye nomthelela womthwalo ekusebenzeni kwe-PMOSFET, njengokwehla kwamandla kagesi, ukusetshenziswa kwamandla, njll. , nayo idinga ukucatshangelwa.

3. Ukuqina kwezinga lokushisa

Ukusebenza kwama-PMOSFET kuthintwa kakhulu izinga lokushisa, ngakho-ke umphumela wokushisa ekusebenzeni kwama-PMOSFET udinga ukucatshangelwa lapho kuklanywa amasekhethi, futhi izinyathelo ezihambisanayo kufanele zithathwe ukuze kuthuthukiswe ukuzinza kwezinga lokushisa kwamasekhethi.

4. Amasekhethi okuvikela

Ukuze uvimbele ama-PMOSFET ukuthi angalinyazwa i-overcurrent kanye ne-overvoltage ngesikhathi sokusebenza, amasekhethi okuvikela afana nokuvikela i-overcurrent kanye nokuvikela u-overvoltage kudingeka afakwe kusekethe. Lawa masekethi okuvikela angavikela ngempumelelo i-PMOSFET futhi andise impilo yayo yesevisi.

 

Kafushane, i-PMOSFET iwuhlobo lwe-MOSFET enesakhiwo esikhethekile nomgomo wokusebenza. Ukuhamba kwayo okuphansi nokufaneleka kwezinhlelo zokusebenza ezinejubane eliphansi, imvamisa ephansi kuyenza isebenze kabanzi emikhakheni ethile. Lapho uklama amasekhethi e-PMOSFET, kudingeka kuqashelwe ukulawulwa kwamandla kagesi esango, ukuxhunywa komthwalo, ukuzinza kwezinga lokushisa namasekhethi okuvikela ukuze kuqinisekiswe ukusebenza kahle nokwethembeka kwesekethe.