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Title:

RC ??

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Title: 2 Author: user 16 Last modified by: user 16 Created Date: 1/5/2004 5:10:09 AM Document presentation format: Other titles – PowerPoint PPT presentation

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Title: RC ??


1
Chapter 2
  • RC ??

2
??????
  • 2.1 ???? ????????? ???
  • 2.2 ???? ???????? (KVL) ????????
    (KCL)
  • 2.3 ??????? ???? ????

3
??????
  • 2.4 RC?? ???? ???? ????
  • 2.5 ??

4
2.1 ????
  • ????(Direct Current, DC) ????????????????,??????
    ,??????????????. ?????(DC voltage source)
    ????
  • VCC???
  • ?. ?????(DC current source)
  • ?????????? ? ????????????,???????????

5
2.1 ????
  • ???????????????? ? ???????????110V/60Hz??????????
  • ????(Alternating Current, AC) ?????????????,????
    ?????????????110V/60Hz????

6
2.1 ????
  • ???????????????,???(VCC)????? ??????????,??????,?
    ??????????,??????????
  • ?????????????????(VCC)?????( ),??????????
  • ????(P)????????????

7
2.1 ????
  • ????????
    ,??Pmax????????????
  • Imax ????????
  • ???,????????????????????????????,??????,?????????
    ?

8
2.2 ????
  • ????
  • V I?R
  • ???????(I)??????????(V)???
  • ??????R??
  • ??????????????????????????(Kirchhoffs
    Voltage Law, KVL)????????(Kirchhoffs Current
    Law, KCL)?

9
2.2 ????
  • ???????? (KVL) ?????,???????????????????????,???
    ?????????,????????????????????

10
2.2 ????
  • ????????(KCL) ?????,???????????,????????????

11
2.2 ????
  • ?????????? ??????????
  • ????KVL?KCL
  • ?????????,??? V I?R
  • ?????????????,???????????????,???????????????

12
2.2 ????
  • ? 1.
  • ?2.5???????(VS)?????????????,????????R3???????R3??
    ?

13
2.3 ???????
  • ???????(Thevenin equivalent circuit)??????,??????
    ???
  • ???2.5?,?R3??,?2.6?????????? ,????2.7?????????(Ve
    q )??????????(Req )?

14
2.3 ???????
  • ??????????? (Veq ),???????(Req
    ),??2.5?????????2.7????????,???????Vo

? 2.7
15
2.3 ???????
  • Veq ?? ? ??R3 ????,?????
    Vo??????
  • ?? ? ,???????
    ???????(R3 ? ?) ,?Vo Veq
    ,????????,????2.6?R2 ????
  • ?? ? Veq???????(open)??
    ????

16
2.3 ???????
  • Req?? ? ??VS????,????? ????????? (
    Ro ) ???
  • ?? ?VeqVS,??VS 0,? Veq 0 ??2.6???
    ,????2.5? ??,
  • ?? ? Req ????????????
    ???(?????,?????),? ?????????????

17
2.3 ???????
  • ???????(????????????)????????????

18
2.3 ???????
  • ? 2.
  • ??????????,???2.9??????Vo

19
2.4 RC??
  • ???????????,?????,????????????,???
  • ????(charge)??????(V)????,??????????????????V

20
2.4 RC??
  • ???????????(Q)?????(V)???
  • C??????(capacitance)?????????,C???,?????????????
    (Farad, F)
  • ?????????1F,??????????F(10?6F)?nF(10?9F)?
    pF(10?12F)?

21
2.4 RC??
  • ???C,???????(A)???????????(?)???,??????????(d)???
  • ???I-V???????????(I)??????? (????????)

????
22
2.4 RC??
  • ??????? ????????RC??,??t 0??????????,?VCC??
    ?????
  • ??KCL?KVL,?????????????????,???????V2(t)?

23
2.4 RC??
  • ?????V2(t)?????????t 0 ???????,
    ? VCC?R?,??????tgt0 ??????,V2??,
    ,??????t?8????VCC?????,??
    0

24
2.4 RC??
  • ? 3.
  • ??2.11?,?VCC 10V,R 1K?,C
    1?F,???V2?0V???(1) 2V(2) 4V(3) 6V?????

25
2.4 RC??
  • ?????????t lt 0 ?,??????V2 VCC?t
    0?,???????,??????R????(discharge)
  • ??KCL?KVL,?????????????????,???????V2(t)?

26
2.4 RC??
  • ?????V2(t)?????????t 0 ???????,V1 V2
    VCC,VCC?R?,??????tgt0 ??????,V2??,V1 V2
    ????????t?8V2 0?I1 0,??????????????

27
2.4 RC??
  • ?????????????R?C????,???????,RC????(RC time
    constant)???,RC??????????????
  • ???????????,??????,??????????

28
2.4 RC??
  • ??????C??????w????????????? (w
    0,???8),?????????
  • ?????,???????????A????B??,???????A?B??????????,???
    ?A?B?????????

29
2.4 RC??
  • ???C??????(coupling capacitor),????????????
    ???,???????????????
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