Typical characteristics, Npn general purpose amplifier, Rise time vs collector current – Fairchild 2N4123 User Manual
Page 4: Noise figure vs frequency, Noise figure vs source resistance, Current gain and phase angle vs frequency, Turn-on time vs collector current, Power dissipation vs ambient temperature
Power Dissipation vs
Ambient Temperature
0
25
50
75
100
125
150
0
0.25
0.5
0.75
1
TEMPERATURE ( C)
P
- PO
W
E
R DI
SSI
P
A
TIO
N
(
W
)
D
o
SOT-223
SOT-23
TO-92
Typical Characteristics
(continued)
Noise Figure vs Frequency
0.1
1
10
100
0
2
4
6
8
10
12
f - FREQUENCY (kHz)
N
F
- NOI
S
E FI
G
URE (
d
B)
V = 5.0V
CE
I = 100
µ
A, R = 500
Ω
C
S
I = 1.0 mA
R = 200
Ω
C
S
I = 50
µ
A
R = 1.0 k
Ω
C
S
I = 0.5 mA
R = 200
Ω
C
S
k
Ω
Noise Figure vs Source Resistance
0.1
1
10
100
0
2
4
6
8
10
12
R - SOURCE RESISTANCE ( )
N
F
-
NO
IS
E
F
IG
U
RE
(
d
B)
I = 100
µ
A
C
I = 1.0 mA
C
S
I = 50
µ
A
C
I = 5.0 mA
C
θ
-
DEGR
EES
0
40
60
80
100
120
140
160
20
180
Current Gain and Phase Angle
vs Frequency
1
10
100
1000
0
5
10
15
20
25
30
35
40
45
50
f - FREQUENCY (MHz)
h
-
CURRE
NT GA
IN
(
d
B)
θ
V = 40V
CE
I = 10 mA
C
h
fe
fe
Turn-On Time vs Collector Current
1
10
100
5
10
100
500
I - COLLECTOR CURRENT (mA)
TI
M
E
(
n
S)
I = I =
B1
C
B2
I
c
10
40V
15V
2.0V
t
@
V = 0V
CB
d
t
@
V = 3.0V
CC
r
Rise Time vs Collector Current
1
10
100
5
10
100
500
I - COLLECTOR CURRENT (mA)
t
-
R
IS
E
T
IM
E
(
n
s
)
I = I =
B1
C
B2
I
c
10
T = 125°C
T = 25°C
J
V = 40V
CC
r
J
2N
412
3
NPN General Purpose Amplifier
(continued)