Yiziphi ukusetshenziswa kwama-MOSFETs?

Ama-MOSFETzisetshenziswa kabanzi. Manje amanye amasekethe amakhulu ahlanganisiwe asetshenziswa i-MOSFET, umsebenzi oyisisekelo kanye ne-BJT transistor, ayashintsha futhi akhulise. Ngokuyisisekelo i-BJT triode ingasetshenziswa lapho ingasetshenziswa khona, futhi kwezinye izindawo ukusebenza kungcono kune-triode.

 

Ukuthuthukiswa kwe-MOSFET

I-MOSFET kanye ne-BJT triode, nakuba kokubili idivayisi ye-semiconductor amplifier, kodwa izinzuzo eziningi kune-triode, njengokumelana nokufaka okuphezulu, umthombo wesignali cishe awukho okwamanje, ohambisana nokuzinza kwesignali yokufaka. Kuyidivayisi ekahle njenge-amplifier yesiteji sokufaka, futhi inezinzuzo zomsindo ophansi nokuzinza okuhle kwezinga lokushisa. Ivamise ukusetshenziswa njenge-preamplifier yamasekhethi okukhulisa umsindo. Kodwa-ke, ngenxa yokuthi iyidivayisi yamanje elawulwa yi-voltage, i-drain current ilawulwa yi-voltage phakathi komthombo wesango, i-coefficient yokukhulisa i-low-frequency transconductance ngokuvamile ayinkulu, ngakho ikhono lokukhulisa liphansi.

 

Ukushintsha umphumela we-MOSFET

I-MOSFET esetshenziswa njenge-switch electronic, ngenxa yokuthembela kuphela ku-polyon conductivity, ayikho efana ne-BJT triode ngenxa yesisekelo samanje kanye nomphumela wokushaja wesitoreji, ngakho-ke isivinini sokushintsha se-MOSFET siyashesha kune-triode, njengeshubhu yokushintsha. ivamise ukusetshenziselwa izehlakalo zamanje ezisezingeni eliphezulu, njengokushintshwa kwamandla kagesi asetshenziswa ku-MOSFET esimweni samanje se-high-frequency high-current. Uma kuqhathaniswa nokushintshwa kwe-BJT triode, ukushintsha kwe-MOSFET kungasebenza kuma-voltage amancane nama-currents, futhi kulula ukuhlanganisa kuma-wafers we-silicon, ngakho asetshenziswa kabanzi kumasekethe amakhulu ahlanganisiwe.

Yiziphi izinyathelo zokuphepha lapho usebenzisaAma-MOSFET?

Ama-MOSFET athambile kakhulu kunama-triode futhi angalimala kalula ngokusetshenziswa okungafanele, ngakho kufanele kuqashelwe ngokukhethekile lapho uwasebenzisa.

(1) Kudingeka ukukhetha uhlobo olufanele lwe-MOSFET ngezikhathi ezihlukene zokusebenzisa.

(2) Ama-MOSFET, ikakhulukazi ama-MOSFET amasango avalelwe, anokuphazamiseka kokufaka okuphezulu, futhi kufanele afinyezwe ku-electrode ngayinye lapho engasetshenziswa ukuze kugwenywe ukulimala kweshubhu ngenxa yokushajwa kwesango lokungena.

(3) Amandla kagesi omthombo wesango lama-MOSFET ahlanganayo awakwazi ukuhlehliswa, kodwa angalondolozwa esimweni esivulekile sesekethe.

(4) Ukuze kugcinwe i-impedance ephezulu yokufaka ye-MOSFET, ithubhu kufanele ivikelwe kumswakama futhi igcinwe yomile endaweni yokusetshenziswa.

(5) Izinto ezishajwa (njenge-soldering iron, amathuluzi okuhlola, njll.) ezithintana ne-MOSFET zidinga ukumiswa ukuze zigweme ukulimala kweshubhu. Ikakhulukazi lapho Welding isango insulated MOSFET, ngokusho umthombo - isango oda ngokulandelana Welding, kungcono ukushisela ngemva kokucisha amandla. Amandla ensimbi ye-soldering kuya ku-15 ~ 30W afanelekile, isikhathi sokushisela akufanele sidlule imizuzwana engu-10.

(6) isango elivinjiwe i-MOSFET alikwazi ukuhlolwa nge-multimeter, lingahlolwa kuphela ngomhloli, futhi kuphela ngemva kokufinyelela kumhloli ukuze kukhishwe izintambo eziyisiyingi ezimfushane zama-electrode. Uma ususiwe, kuyadingeka ukufinyeza ama-electrode ngaphambi kokususwa ukuze ugweme ukuwela kwesango.

(7) Lapho usebenzisaAma-MOSFETngemikhondo ye-substrate, imikhondo ye-substrate kufanele ixhunywe kahle.