MOSFET ni iki? Ni ibihe bipimo nyamukuru?

Mugihe cyo gushushanya amashanyarazi cyangwa moteri ya moteri ikoreshaMOSFETS, ibintu nka on-resistance, voltage ntarengwa, hamwe numuyoboro mwinshi wa MOS muri rusange birasuzumwa.

Imiyoboro ya MOSFET ni ubwoko bwa FET ishobora guhimbwa nkubwoko bwo kuzamura cyangwa kugabanuka, P-umuyoboro cyangwa N-umuyoboro wubwoko 4. kuzamura NMOSFETs no kuzamura PMOSFETs ikoreshwa muri rusange, kandi byombi byavuzwe.

Ibi byombi bikoreshwa cyane ni NMOS. impanvu nuko kurwanya kwiyobora ari bito kandi byoroshye gukora. Kubwibyo, NMOS isanzwe ikoreshwa muguhindura amashanyarazi hamwe na moteri ya moteri.

Imbere muri MOSFET, thyristor ishyirwa hagati yumuyoboro nisoko, ifite akamaro kanini mugutwara imizigo yindobanure nka moteri, kandi igaragara gusa muri MOSFET imwe, ntabwo mubisanzwe muri chip yumuzunguruko.

Ubushobozi bwa parasitike burahari hagati yipine eshatu za MOSFET, ntabwo ari uko tuyikeneye, ariko kubera imbogamizi zuburyo bwo gukora. Kuba hari ubushobozi bwa parasitike bituma birushaho kuba ingorabahizi mugihe cyo gutegura cyangwa guhitamo umushoferi, ariko ntibishobora kwirindwa.

Ibipimo nyamukuru byaBYINSHI

1, fungura voltage VT

Gufungura voltage (izwi kandi nka voltage yinjirira): kugirango voltage yumuryango isabwa gutangira gukora umuyoboro uyobora isoko S na drain D; bisanzwe N-umuyoboro MOSFET, VT ni 3 ~ 6V; binyuze muburyo bunoze, agaciro ka MOSFET VT gashobora kugabanuka kugera kuri 2 ~ 3V.

2, DC yinjiza irwanya RGS

Ikigereranyo cya voltage yongeweho hagati yinkomoko y amarembo ninkomoko y irembo Ibi biranga rimwe na rimwe bigaragazwa numuyoboro winjira unyura mumarembo, RGS ya MOSFET irashobora kurenga 1010Ω.

3. Kuramo inkomoko yamenetse ya BVDS voltage.

Ukurikije imiterere ya VGS = 0 (yongerewe imbaraga), mugikorwa cyo kongera ingufu zumuvuduko wamazi, indangamuntu iriyongera cyane mugihe VDS yitwa imiyoboro yamashanyarazi yamenetse BVDS, indangamuntu yiyongera cyane kubera impamvu ebyiri: (1) inkangu gusenyuka kurwego rwa depletion hafi yumugezi, (2) gusenyuka kwinjirira hagati yumugezi ninkomoko yinkomoko, MOSFETs zimwe na zimwe zifite uburebure buke bwumwobo, byongera VDS kuburyo urwego rwamazi mu karere k’amazi rwagutse mukarere kavukire, gukora Umuyoboro muremure ni zeru, ni ukuvuga, kubyara imiyoboro-soko yinjira, kwinjira, benshi mubatwara mukarere kavukire bazakururwa bitaziguye numuriro w'amashanyarazi wo murwego rwo kugabanuka mukarere ka drain, bivamo indangamuntu nini.

4, amarembo isoko yameneka voltage BVGS

Iyo amarembo yumuryango yiyongereye, VGS mugihe IG yongerewe kuva kuri zeru bita amarembo isoko yameneka voltage BVGS.

5、Umuyoboro muke muto

Iyo VDS nigiciro gihamye, ikigereranyo cya microvariation yumuyaga wamazi na microvariation yumuriro wamashanyarazi utera impinduka yitwa transconductance, igaragaza ubushobozi bwumuriro wamashanyarazi kugirango ugenzure imiyoboro y'amazi, kandi ni an Ibyingenzi byingenzi biranga ubushobozi bwa amplification yaBYINSHI.

6, kurwanya RON

Kurwanya-RON yerekana ingaruka za VDS kuri ID, ni ihindagurika ryumusozi wumurongo wa tangent wibiranga imiyoboro mugihe runaka, mukarere kuzuye, indangamuntu hafi idahinduka hamwe na VDS, RON nini cyane agaciro, muri rusange muri kilo-Ohms kugeza kuri kilo-Ohms amagana, kubera ko mumuzunguruko wa digitale, MOSFETs ikorera muri reta ya VDS = 0, bityo rero, aho bigeze, kuri-kurwanya RON irashobora kugereranywa ninkomoko ya RON igereranijwe, kuri rusange MOSFET, agaciro ka RON mumajana magana.

7, ubushobozi bwa inter-polar

Ubushobozi bwa interpolar bubaho hagati ya electrode eshatu: ubushobozi bwamarembo CGS, ubushobozi bwamarembo CGD hamwe nubushobozi bwo kuvoma CDS-CGS na CGD ni 1 ~ 3pF, CDS ni 0.1 ~ 1pF.

8、Urusaku ruke

Urusaku ruterwa no kutagenda neza mu kugenda kwabatwara mu muyoboro. Kuberako ihari, voltage idasanzwe cyangwa itandukaniro ryubu bibaho kubisohoka nubwo nta kimenyetso cyatanzwe na amplifier. Urusaku rusanzwe rugaragazwa ukurikije urusaku NF. Igice ni decibel (dB). Agaciro gato, urusaku ruke rutanga. Urusaku ruke-rwinshi ni urusaku rupimirwa murwego ruto. Urusaku rwibintu byumurima ni hafi ya dB nkeya, munsi ya bipolar triode.