Ziziphi ukusetyenziswa kwee-MOSFETs?

Ii-MOSFETszisetyenziswa ngokubanzi. Ngoku ezinye iisekethe ezinkulu ezidityanisiweyo zisetyenziswa MOSFET, umsebenzi osisiseko kunye ne-BJT transistor, ziyatshintsha kunye nokukhulisa. Ngokusisiseko i-BJT triode ingasetyenziswa apho ingasetyenziswa khona, kwaye kwezinye iindawo ukusebenza kubhetele kune-triode.

 

Ukwandiswa kweMOSFET

I-MOSFET kunye ne-BJT triode, nangona zombini isixhobo se-semiconductor amplifier, kodwa iingenelo ezingaphezulu kune-triode, ezifana nokuchasana kwegalelo eliphezulu, umthombo wesignali uphantse ungabikho ngoku, ohambelana nokuzinza komqondiso wegalelo. Isixhobo esifanelekileyo njenge-amplifier yenqanaba lokufaka, kwaye ineenzuzo zengxolo ephantsi kunye nokuzinza okuhle kobushushu. Ihlala isetyenziswa njenge-preamplifier yeesekethe zokukhulisa umsindo. Nangona kunjalo, ngenxa yokuba sisixhobo sangoku esilawulwa yi-voltage, i-drain current ilawulwa yi-voltage phakathi komthombo wesango, i-coefficient yokukhulisa i-low-frequency transconductance ayinkulu, ngoko ke amandla okukhulisa anzima.

 

Ukutshintsha isiphumo se-MOSFET

I-MOSFET esetyenziswa njengokutshintsha kwe-elektroniki, ngenxa yokuxhomekeka kuphela kwi-polyon conductivity, akukho nto efana ne-BJT triode ngenxa yesiseko sangoku kunye nesiphumo sokugcinwa kwentlawulo, ngoko ke isantya sokutshintsha se-MOSFET sikhawuleza kune-triode, njengetyhubhu yokutshintsha. isetyenziswa rhoqo kwizihlandlo eziphezulu zangoku, ezinjengokutshintsha izixhobo zombane ezisetyenziswa kwi-MOSFET kwimo ye-high-frequency high-current state yomsebenzi. Xa kuthelekiswa nokutshintsha kwe-BJT triode, utshintsho lwe-MOSFET lunokusebenza kumbane omncinci kunye nemisinga, kwaye kulula ukudibanisa kwii-silicon wafers, ngoko ke zisetyenziswa ngokubanzi kwiisekethe ezinkulu ezidibeneyo.

Ngawaphi amanyathelo okhuseleko xa usebenzisaIi-MOSFETs?

Ii-MOSFET zibuthathaka ngakumbi kunee-triodes kwaye zinokonakala ngokulula ngokusetyenziswa ngokungafanelekanga, ngoko ke kufuneka kuqwalaselwe ngenyameko enkulu xa uzisebenzisa.

(1) Kuyimfuneko ukukhetha uhlobo olufanelekileyo lwe-MOSFET kumathuba ahlukeneyo osetyenziso.

(2) Ii-MOSFETs, ngakumbi ii-MOSFET zamasango agqunyiweyo, zine-impedance ephezulu, kwaye kufuneka zifinyezwe kwi-electrode nganye xa ingasetyenziswanga ukuthintela umonakalo kwityhubhu ngenxa yentlawulo yokungena kwisango.

(3) Amandla ombane omthombo wesango le-junction ye-MOSFETs ayinakutshintshwa, kodwa inokugcinwa kwimeko yesekethe evulekileyo.

(4) Ukuze kugcinwe i-impedance ephezulu ye-MOSFET, ityhubhu kufuneka ikhuselwe kumswakama kwaye igcinwe yomile kwindawo yokusetyenziswa.

(5) Izinto ezitshajiweyo (ezifana ne-soldering iron, izixhobo zovavanyo, njl.njl.) ezidibana ne-MOSFET kufuneka zibekwe phantsi ukuthintela umonakalo kumbhobho. Ngokukodwa xa ukuwelda isango elifakwe i-MOSFET, ngokutsho komthombo - ulandelelwano lwesango lokuwelda, kungcono ukuwelda emva kokucima kombane. Amandla entsimbi ye-soldering ukuya kwi-15 ~ 30W ifanelekile, ixesha le-welding akufanele lidlule imizuzwana eyi-10.

(6) isango eligqunyiweyo I-MOSFET ayinakuvavanywa nge-multimeter, inokuvavanywa kuphela nge-tester, kwaye kuphela emva kokufikelela kumvavanyi ukususa i-wiring ye-short-circuit ye-electrode. Xa ususiwe, kuyimfuneko ukujikeleza ngokukhawuleza i-electrodes ngaphambi kokususwa ukuze ugweme ukugqithisa kwesango.

(7) Xa usebenzisaIi-MOSFETskunye ne-substrate lead, i-substrate lead kufuneka idibaniswe ngokufanelekileyo.