????????????,?FET??? (Field Effect Transistor)?

1
???
?
?
?
??????
???????
???????
???
??????
2
???
??? ??????
????????????,?FET??? (Field Effect
Transistor)?
???????
??
??????
3
???
?????????
??????????????????????,??MOS??
N??
P??
???MOS?
MOS????????
???MOS?
N??
P??
4
???
(?)N?????MOS?????????
1.??
d
N??
g
s
d
SiO2???
b
g
s
N
N
???????N???P?????
d
N??
P??
b
g
b
P??
s
g-??
S-??
d-??
??
b-????
5
???
2.????
????????????????????????,?????-?????????
(1)???????
????????????
??
???????,???P???????????????????,????????
?uGS?????????(UT)??,????????,?P??????????????N??,?
??????????????
????????uGS??????(UT)?uGS??,????,???????,??????
6
(2)????uGS?????iD?????
???
?????uGS0?,??????????????????PN?,?????????,??????
???????,iD0?
??VGG,?uGSUT??????????????????,??????(??)??????,?
?????iD?
uGSUT?????????
uGS?iD?????
uGS??
??????
iD??
??????
7
(3)????uDS?????iD???
???
uGSUT ?,??????uDS??,?uGDgtgtUT?,?????uDS?????,?????
???,iD?uDS?????????
?uDS???,????????????,????????????????uDS??,???????
?,iD???uDS?????
?uDS????uGD UT?,??????,??????,??????
????uDS ,?uGD ltUT,?????,???uDS?????????????,??uDS?
??????????????
VGG
uGDgtUT
uGDUT
uGDltUT
???
N??
8
???
(?)N?????MOS??????
1.????
??????uGS??????,iD?uDS?????,?
?????????
9
???
?????(????)
????????,uGSgtUT,uDS??,uGDgtUT????
? ?
??uGS??,????rDS??,iD?uDS?????????
?
?
?uGS??, rDS??,?????uGS????????
N?????MOS??????
10
???
???(???)
???? ????,uGSgtUT,uDS??,uGDltUT????
??
iD(mA)
iD??uGS????uGS??,??uDS???,iD?????
?
uGS6V
6
?
5
5
4
????????
4
3
2
3
1
2
uDS(V)
16
14
0
10
12
2
6
8
4
???
?????uGSUT???
????????,???iD0,?????????
11
???
2.????
??????uDS?????,iD?uGS?????,?
UT
? ?
?FET??????,??uDS????????????
????????
(UGSgtUT)
??K???,???????,???????
12
???
(?)N?????MOS??????
????
????
????
????
13
???
1.????
(2)??????RGS
(1)????UT
?uDS0????,???????????????,??????????RGS????,????
??
????????????????????????????uDS???,??uGS,?iD??????
??????uGS??
14
???
2.????
(1)??gm
???uDS???,????????????????????????,?
gm??????????,????????????????????????,????????????
?????
(2)???????????Cgs????????Cgd,????????????,??????
15
???
3.????
(1)????????IDM
?????????,??????????
(2)????????PDM
?????????????,??????????PCM?
????????????????
16
???
????
(3)????????U(BR)GS
???uDS0?,???????????,????????????uGS???????????
(4)????????U(BR)DS
???uDS???,?iD???????uDS??
????????????????,??????????,??????
U(BR)DS
17
???
(?)N?????MOS?
VDD
1.????
SiO2?????????????
?uGS0?
N??
P???????????,???????
?????
?uGSgt0?
??????,iD???
?uGSlt0?
??????,iD???
?uGS????????UP?,????????????,??????,iD0,UP???????
18
???
2.????
????
????
???????
????????
??IDSS?uGS0??iD?,????????,?????????
19
???
3.????
(1)????UP
???????????????????
?????,?????uDS???,?iD?????????????uGS??
(2)??????IDSS
????uDS???????,?uGS0v??iD?,?????????
??????????????????
20
???
????????
JFET(Junction Field Effect Transistor)
N?????????????
??P????N????,?????uDS?????????,???N???
21
???
N????????
??
???
?uGS0?,????????,?????????????????
22
uGS????????
???
?????????
??uGS???,?????????,????????,????iD????????????????
??
uGSUP
23
???
uDS????????
?????????
uGDUP
UPltuGS0
uGDgtUP
uGDltUP
??????,PN???,??????,PN????
??uDS??,PN???,???????
uDS???,????????
24
???
????
iD(mA)
IDSS
uDS10V
UP
-4
0
-uGS(V)
1
2
3
4
N??????????????????
??N??????uGSgt0,???PN??????,???????????,????????
25
???
?????????
?????????????
(1)?????,???????????????,????????????????????????
???????????
(2)???????????uGS???????iD,?????????????????????i
B(?????iE)????????iC,?????????
(3)??????????????????????
26
???
??
??MOS??????????,???????????????????????????
??????,???????????,???uGS???,??????????
????????
27
???
??
(4)???????gm????,???????ß??????????,??????????????
??
(5)??????????????????,MOS??????????????,???d?s????
?
???????c?e????????????,??ß???????
(6)??????????????
28
???
??
(7)???????????,????????????????????????
iD(mA)
T -55?
uDS10V
??????????,????????????
25?
????,?????????????Q(????)?ID?UDS?????????
125?
Q
uGS(V)
??????????????,?????????????,????,???????????
29
???
? ? ? ?
????????-??????uGS?????????????????,?????-?????iD?
??,??iD?????uGS???????
????????????????????????????????gm?UT?UP?IDSS?IDM?
U(BR)DS?PDM??????
1. N?????MOS?
UT
????
????
30
2. N?????MOS?
???
????
????
3. N????????
iD(mA)
IDSS
uDS10V
UP
-4
0
-uGS(V)
1
2
3
4
31
???
? ? ? ?
???????????????,??????????????????(BJT)?????(FET)?
???????????????
??PN?
1. ?????
????????????????N?????P????,????????????????????,?
????????????
32
???
?????????????????
???????????????????????????,?????????????????
2. PN?
????????????????(???)?,????????,???????????????,??
??PN??
????PN???????????????????????,????????????????????
????????????
33
???
????????
??PN?????????????????
?????????,??????,????????????????,??????,???????
???????
IF?IR?UR?fM??????????
?????????????,??????????PN????????????????
34
???
?????
????????????
?????????????????,??????????????????????????????,?
?????,????????????????????iC,???iB(?iE,uBE)?iC????
????,??iC?????iB???????
???????????????????????????,ß?a?ICBO(ICEO)?ICM?U(B
R)CEO?PCM?fM????????
??????????????????,???????????????????????
35
???
??????
?????????????????,??????????????N???P??,?MOS?????
???????????
???????????,???-???????????????????????,??????????
????????iD???,??iD?????uGS??????,????????????????
gm?UT?UP?IDSS?IDM?U(BR)DS?PDM?????????????
??????,?????????????????????????