4-1
解:
1
2
1
1
21
2
34
3
32
4343
2
2
ln
2
2
1
2
230
1
C
R
C
T
R
CC
C
CR
CC
BE
R
I
I
I
U
R
VV
I
II
I
II
IIVV
R
U
I
组成微电流恒流源、)(
所以组成镜像恒流源、
)(
4-2
4
3
2
1
1
40
40321
4
3
43
2
1
21
1
,,
3
1
3
2
1
2
C
C
C
C
C
C
i
CCCCi
C
C
C
C
I
I
I
II
I
I
I
IIIIII
R
R
I
I
VV
R
R
I
I
VV
组成比例恒流源、
组成比例恒流源、
4-3
22
22
221
lnln
ln
1
1
1
R
I
I
U
R
I
I
U
II
I
I
URIU
II
S
r
T
S
E
T
RC
S
E
TRBE
rE
4-5
COCbeBid
beB
EbeB
uC
ud
C M R
CQCCCQCE
LCC
LC
LCC
CC
E
BEEE
QC
RRrRR
rR
RrR
A
A
K
RIUU
RRR
RR
RU
U
R
UU
I
),(2)3(
)(2
2
||)2(
7.0
||
2
1
1
'
2
'
2
'
'
2
路化简根据戴维南定理将原电
)解:(
4-6
增大减小,
共模输入电压应:
)解:(
idud
beQEER
iC
CCQCCC
EE
B
be
C
ii
ud
QE
bb
bebe
CQEQE
BER
EC
EE
R
RA
rIIUR
VUV
VRIUU
RR
UR
U
r
R
UU
U
A
I
rrr
III
R
UU
II
RR
UR
U
11321
1
21
1
3
121
0
1
21
321
3
2
33
21
2
2
)4(
910
96115
10
2010
1520
)3(
26
)1(
2
1
1
'
4-7
Dm
i
ud
Rr
BEEECC
r
DQCCRr
Rg
U
U
A
I
UUU
R
mAIIII
0
34
)2(
15.0221 )解:(
4-8
1
1
2
2
2
2
1
1
2
1
1
21
21
2
2
2
1
11
2
2
2
1
21
1
1
013.0
26
2 0 0 1
26
)1(
1
'
be
C
be
Cbe
be
be
C
be
i
ududud
be
C
ud
QE
bb
be
be
i
be
i
ud
rR
R
r
Rr
rR
r
R
rR
R
AAA
r
R
A
I
rr
r
R
rR
R
A
BB
B
B
Ebe
C
beB
iC
u
Ebei
C
R
C
EER
C
EE
CE
Rr
R
rR
RR
A
RrR
R
U
II
RIU
R
U
II
C
C
)1(
)||(
2
1
)1()2(
22
7.0
1
3
3
1
2
32
1
1
3
3
33
1
1
)解:(
4-9
RC
4-10
差动放大器的电压传输特性曲线
Vu
kR
VUVU
C
Tid
15
102
,1.042.11
0
值接近时,变为)当(
电路呈现限幅特性
)由于(
解,u0/V
t
-10
10
4-11
)
2
)1((2
2
)1(
2
,01
0
W
beSid
W
beS
C
ud
W
R
rRR
R
rR
R
A
Ru
)(
的动臂应向右移动)若(
解:
4-12
111
1
11
120
0
221420
43121
2
2
2
,22
2
2
1
be
L
beb
LC
ud
bebi
LCLC
i
ud
CCCCC
CCCCC
r
R
rI
RI
A
rIU
RIRIU
U
U
A
IIIIII
IIIII
)(
,所以且)由于(
解:
3-4
恒流沟道结型场效应管)为解:(
VU
VU
mA
U
U
Ii
Na
GD
DS
G S o f f
GS
D S SD
4.84.62
4.63.308.110
08.1)1(
2
截止管)为增强型解:(
VUVU
N M O Sb
G S t hGS 32
可变电阻区沟道结型场效应管)为解:(
VUVU
VUmAII
Pc
G S o f fGD
DSD S SD
44.3
4.33.3210,2
恒流管)为耗尽型解:(
VUVU
VU
mAII
P M O Sd
G S o f fGD
DS
D S SD
24.5
4.523.312
2
3-8
70
213
62424
'
1
62
87
01
0
2
5
'
101
121
)3(
||)2(
])1([||||
)1(
)||(
,
1
1
RR
RRRR
RrRRRR
Rr
RR
U
U
A
Rg
Rg
U
U
AAAA
i
beiL
be
u
m
Lm
i
uuuu
)解:(
解:
1
2
1
1
21
2
34
3
32
4343
2
2
ln
2
2
1
2
230
1
C
R
C
T
R
CC
C
CR
CC
BE
R
I
I
I
U
R
VV
I
II
I
II
IIVV
R
U
I
组成微电流恒流源、)(
所以组成镜像恒流源、
)(
4-2
4
3
2
1
1
40
40321
4
3
43
2
1
21
1
,,
3
1
3
2
1
2
C
C
C
C
C
C
i
CCCCi
C
C
C
C
I
I
I
II
I
I
I
IIIIII
R
R
I
I
VV
R
R
I
I
VV
组成比例恒流源、
组成比例恒流源、
4-3
22
22
221
lnln
ln
1
1
1
R
I
I
U
R
I
I
U
II
I
I
URIU
II
S
r
T
S
E
T
RC
S
E
TRBE
rE
4-5
COCbeBid
beB
EbeB
uC
ud
C M R
CQCCCQCE
LCC
LC
LCC
CC
E
BEEE
QC
RRrRR
rR
RrR
A
A
K
RIUU
RRR
RR
RU
U
R
UU
I
),(2)3(
)(2
2
||)2(
7.0
||
2
1
1
'
2
'
2
'
'
2
路化简根据戴维南定理将原电
)解:(
4-6
增大减小,
共模输入电压应:
)解:(
idud
beQEER
iC
CCQCCC
EE
B
be
C
ii
ud
QE
bb
bebe
CQEQE
BER
EC
EE
R
RA
rIIUR
VUV
VRIUU
RR
UR
U
r
R
UU
U
A
I
rrr
III
R
UU
II
RR
UR
U
11321
1
21
1
3
121
0
1
21
321
3
2
33
21
2
2
)4(
910
96115
10
2010
1520
)3(
26
)1(
2
1
1
'
4-7
Dm
i
ud
Rr
BEEECC
r
DQCCRr
Rg
U
U
A
I
UUU
R
mAIIII
0
34
)2(
15.0221 )解:(
4-8
1
1
2
2
2
2
1
1
2
1
1
21
21
2
2
2
1
11
2
2
2
1
21
1
1
013.0
26
2 0 0 1
26
)1(
1
'
be
C
be
Cbe
be
be
C
be
i
ududud
be
C
ud
QE
bb
be
be
i
be
i
ud
rR
R
r
Rr
rR
r
R
rR
R
AAA
r
R
A
I
rr
r
R
rR
R
A
BB
B
B
Ebe
C
beB
iC
u
Ebei
C
R
C
EER
C
EE
CE
Rr
R
rR
RR
A
RrR
R
U
II
RIU
R
U
II
C
C
)1(
)||(
2
1
)1()2(
22
7.0
1
3
3
1
2
32
1
1
3
3
33
1
1
)解:(
4-9
RC
4-10
差动放大器的电压传输特性曲线
Vu
kR
VUVU
C
Tid
15
102
,1.042.11
0
值接近时,变为)当(
电路呈现限幅特性
)由于(
解,u0/V
t
-10
10
4-11
)
2
)1((2
2
)1(
2
,01
0
W
beSid
W
beS
C
ud
W
R
rRR
R
rR
R
A
Ru
)(
的动臂应向右移动)若(
解:
4-12
111
1
11
120
0
221420
43121
2
2
2
,22
2
2
1
be
L
beb
LC
ud
bebi
LCLC
i
ud
CCCCC
CCCCC
r
R
rI
RI
A
rIU
RIRIU
U
U
A
IIIIII
IIIII
)(
,所以且)由于(
解:
3-4
恒流沟道结型场效应管)为解:(
VU
VU
mA
U
U
Ii
Na
GD
DS
G S o f f
GS
D S SD
4.84.62
4.63.308.110
08.1)1(
2
截止管)为增强型解:(
VUVU
N M O Sb
G S t hGS 32
可变电阻区沟道结型场效应管)为解:(
VUVU
VUmAII
Pc
G S o f fGD
DSD S SD
44.3
4.33.3210,2
恒流管)为耗尽型解:(
VUVU
VU
mAII
P M O Sd
G S o f fGD
DS
D S SD
24.5
4.523.312
2
3-8
70
213
62424
'
1
62
87
01
0
2
5
'
101
121
)3(
||)2(
])1([||||
)1(
)||(
,
1
1
RR
RRRR
RrRRRR
Rr
RR
U
U
A
Rg
Rg
U
U
AAAA
i
beiL
be
u
m
Lm
i
uuuu
)解:(