???????(JFET)JFET ???BJT ??????,?????(source),??(drain),????(gate) - PowerPoint PPT Presentation

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???????(JFET)JFET ???BJT ??????,?????(source),??(drain),????(gate)

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Title: ???????(JFET)JFET ???BJT ??????,?????(source),??(drain),????(gate)


1
?????
2
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5.1 ??
  • ???????(JFET)JFET ???BJT ??????,?????(source),??(d
    rain),????(gate)

4
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5.2 JFET????
  • ?5-3??n ???p ??????????????? (?BJT ?
    ??)??BJT ????,BJT ??????????????????,?JFET ??????

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  • ?5-4??????????,?????????,?????????????????????????
    ?????(??p ?????)???n ??????n ?????????????????????
    ??????--???????????--???????,VDS ?VGS
    ??????,?????????n ???

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  • ??????,?????--????,????????
  • ????????(pinch-off voltage
  • ? ????ID ????),
  • ????--??????????????--???? ????
    ????????????JFET ???

10
5.3 JFET??
  • JFET ?????????,??????(?BJT ????????),????,?????(?B
    JT ?????????),????????
  • ????
  • ??????,JFET ???--????????????5-5??????,??
    ???????,????????

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  • ?????
  • ???????????????,?????BJT ?????

14
  • ?????
  • ?????????????????
  • ?????????Q ???????????????????????????

15
5.4 JFET??
  • ????????????????,JFET ????????????????,?5-9??JFET
    ????????????????????JFET ????(??????megOhm
    )?????????????????,?????????????????

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  • ??????(BJT )????,BJT ???????,?JFET ????????BJT
    ?????(normally off),?JFET ?????(normally
    on),????????????????????????,??BJT ????,JFET
    ???????,???,?????????

18
  • ??????????(MOSFET)
  • ?????(MOS)???????????????,??,?????,???????MOS?????
    ???????????????????,????????????????MOS?????BJT???
    ?????

19
5.5 MOSFET??
  • MOSFET ???????--???(E-MOSFET )????(D-MOSFET)?
  • ??????????????????????????????????,???????

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  • ??????????????????????????????
    ??,????????,???????????
  • ???????MOSFET,??????????????,?????????????

24
5.6 VMOS?????
  •  ?????????,???????????????????????????????????????
    ???????????,??????????????????MOSFET ?????????
  • VMOS ??????????????,???V ???,????????N
    ???????????????????????,???VMOS ??????????VMOS
    ??????????
  •  

25
  • ???5-13?,VMOS ???????????????????????????,???????,
    ????????????VMOS ???????,?????????,???????????????
    ?????,????????????

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5.7 ?????MOSFET???
  • ??MOSFET ?????????????????????????????????????????
    ?,?????????????????????????,???MOSFET ???????????
  • LDMOS ??????MOSFET ??????????????,??????????????,?
    ?????????????????????????????????N ????????

29
5.9 UJT????
  • UJT ???????????????????UJT ,?UJT ????????????

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(No Transcript)
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5.10 UJT????
??UJT ???????????????(triac )?SCR ?????,?RC
??????????,?????????????
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(No Transcript)
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