CHAPTER 13
13.1
Assuming linear operation :
v
BE
=
0.700
+
0.005sin2000
π
t
V
v
ce
=
5
mV
8
mV
⎛
⎝
⎜
⎞
⎠
⎟
−
1.65
V
(
)
⎡
⎣
⎢
⎤
⎦
⎥
sin2000
π
t
=
−
1.03sin2000
π
t
V
v
CE
=
5.00
−
1.03sin2000
π
t
V
;
10  3300
I
C
≥
0.700
→
I
C
≤
2.82
mA
13.2
Assuming linear region operation :
v
GS
=
3.50
+
0.25sin2000
π
t
V
v
ds
=
0.25
V
0.50
V
−
2
V
(
)
⎡
⎣
⎢
⎤
⎦
⎥
sin2000
π
t
=
−
1.00sin2000
π
t
V
v
DS
=
4.80
−
1.00sin2000
π
t
V
v
DS
≥
v
GS
−
V
TN
→
10
−
3300
I
D
−
1.00sin2000
π
t
≥
3.50
+
0.25sin2000
π
t
−
1
For sin2000
π
t
=
1,
I
D
≤
10
−
1
−
3.5
−
0.25
+
1
3300
V
Ω
=
1.89
mA
13.3
(a) C
1
is a coupling capacitor that couples the ac component of v
I
into the amplifier. C
2
is a
coupling capacitor that couples the ac component of the signal at the collector to the output v
O
.
C
3
is a bypass capacitor.
(b) The signal voltage at the top of resistor R
4
will be zero.
13.4
(a) C
1
is a bypass capacitor.
C
2
is a coupling capacitor that couples the ac component of v
I
into
the amplifier.
C
3
is a coupling capacitor that couples the ac component of the signal at the
collector to output v
O
.
(b) The signal voltage at the base will be v
b
= 0.
13.5
(a) C
1
is a coupling capacitor that couples the ac component of v
I
into the amplifier.
C
2
is a
bypass capacitor.
C
3
is a coupling capacitor that couples the ac component of the signal at the
collector to output v
O
.
(b) The signal voltage at the emitter will be v
e
= 0.
13.6
(a) C
1
is a coupling capacitor that couples the ac component of v
I
into the amplifier. C
2
is a
bypass capacitor.
C
3
is a coupling capacitor that couples the ac component of the signal at the
drain to output v
O
.
(b) The signal voltage at the source will be v
s
= 0.
13.7
131
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(a) C
1
is a coupling capacitor that couples the ac component of v
I
into the amplifier.
C
2
is a
coupling capacitor that couples the ac component of the signal at the drain to output v
O
.
13.8
(a) C
1
is a coupling capacitor that couples the ac component of v
I
into the amplifier.
C
2
is a
bypass capacitor.
C
3
is a coupling capacitor that couples the ac component of the signal at the
drain to output v
O
.
(b) The signal voltage at the source will be v
s
= 0.
13.9
(a) C
1
is a coupling capacitor that couples the ac component of v
I
into the amplifier. C
2
is a
bypass capacitor. C
3
is a coupling capacitor that couples the ac component of the signal at the
collector to output v
O
.
(b) The signal voltage at the emitter will be v
e
= 0.
13.10
(a) C
1
is a coupling capacitor that couples the ac component of v
I
into the amplifier. C
2
is a
coupling capacitor that couples the signal from the emitter of Q
1
back to the node joining R
1
and
R
2
. C
3
is a coupling capacitor that couples the ac component of the signal at the emitter to the
output v
O
.
(b) The signal voltage at the collector will be zero.
13.11
(a) C
1
is a coupling capacitor that couples the ac component of v
I
into the amplifier. C
2
is a
bypass capacitor.
C
3
is a coupling capacitor that couples the ac component of the signal at the
drain to the output v
O
. (b) The signal voltage at the top of R
4
will be zero.
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 Spring '08
 BRAUN
 Orders of magnitude, RO, Electronic amplifier, Grid bias, Biasing, IC power supply pin

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