Chifukwa chiyani ma voltage a MOSFET amawongoleredwa?

Ma MOSFET (Metal Oxide Semiconductor Field Effect Transistors) amatchedwa zida zoyendetsedwa ndi voteji makamaka chifukwa mfundo zake zimadalira kwambiri kuwongolera kwamagetsi pachipata (Vgs) pa drain current (Id), m'malo modalira pakalipano kuti aziwongolera, monga ndizomwe zimachitika ndi bipolar transistors (monga BJTs). Zotsatirazi ndikulongosola mwatsatanetsatane kwa MOSFET ngati chipangizo choyendetsedwa ndi magetsi:

Mfundo Yogwirira Ntchito

Kuwongolera kwa Magetsi a Gate:Mtima wa MOSFET uli mu kapangidwe kake pakati pa chipata chake, gwero ndi kukhetsa, ndi chosanjikiza (nthawi zambiri silicon dioxide) pansi pa chipata. Mphamvu yamagetsi ikagwiritsidwa ntchito pachipata, gawo lamagetsi limapangidwa pansi pa gawo lotsekereza, ndipo gawo ili limasintha ma conductivity a dera pakati pa gwero ndi kukhetsa.

Mapangidwe a Channel Conductive:Kwa ma MOSFETs a N-channel, pamene magetsi a chipata cha Vgs ali okwera kwambiri (pamwamba pa mtengo wina wotchedwa threshold voltage Vt), ma elekitironi omwe ali mu gawo la P-mtundu pansi pa chipata amakopeka ndi gawo la pansi la insulating layer, kupanga N- lembani conductive njira yomwe imalola kuti madulidwe pakati pa gwero ndi kukhetsa. Mosiyana ndi izi, ngati Vgs ndi yotsika kuposa Vt, njira yoyendetsera siinapangidwe ndipo MOSFET yatha.

Kukhetsa mphamvu panopa:Kukula kwa Id yapano ya kukhetsa kumayendetsedwa makamaka ndi ma voltage gate Vgs. Kukwera kwa Vgs, ndikokulirapo kwa njira yoyendetsera, komanso kukulira kwa ID yapano. Ubale uwu umalola MOSFET kuti ikhale ngati chipangizo chamakono choyendetsedwa ndi magetsi.

Ubwino wa Piezo Characterization

Kulowetsa Kwakukulu:Kulowetsedwa kwa MOSFET ndikokwera kwambiri chifukwa cha kudzipatula kwa chipata ndi dera la gwero la madzi ndi chigawo chotchinga, ndipo chipata chamakono chimakhala pafupifupi zero, zomwe zimapangitsa kuti zikhale zothandiza m'mabwalo omwe kulowetsedwa kwakukulu kumafunika.

Phokoso Lochepa:Ma MOSFET amatulutsa phokoso lochepa kwambiri panthawi yogwira ntchito, makamaka chifukwa cha kulowerera kwawo kwakukulu komanso kachitidwe ka unipolar carrier conduction.

Liwiro losintha mwachangu:Popeza ma MOSFET ndi zida zoyendetsedwa ndi magetsi, liwiro lawo losinthira nthawi zambiri limakhala lachangu kuposa la bipolar transistors, lomwe limayenera kudutsa njira yosungiramo ndalama ndikutulutsa panthawi yosinthira.

Kugwiritsa Ntchito Mphamvu Zochepa:M'boma, kukana kwa drain-source (RDS(on)) kwa MOSFET ndikotsika, komwe kumathandizira kuchepetsa kugwiritsa ntchito mphamvu. Komanso, m'malo otsika, kugwiritsa ntchito mphamvu zokhazikika kumakhala kotsika kwambiri chifukwa chipata chapafupi chimakhala pafupifupi ziro.

Mwachidule, ma MOSFET amatchedwa zida zoyendetsedwa ndi magetsi chifukwa mfundo zawo zogwirira ntchito zimadalira kwambiri kuwongolera komwe kumachokera pamagetsi amagetsi. Kuwongolera kwamagetsi kumeneku kumapangitsa ma MOSFET kulonjeza kuti azigwiritsa ntchito mosiyanasiyana pamabwalo amagetsi, makamaka komwe kumapangitsa kuti pakhale kusokoneza kwambiri, phokoso lochepa, kuthamanga kwachangu komanso kugwiritsa ntchito mphamvu pang'ono.