2N4401
100
70
50
t, TIME (ns)
t, TIME (ns)
30
20
t
r
@ V
CC
= 30 V
t
r
@ V
CC
= 10 V
t
d
@ V
EB
= 2.0 V
t
d
@ V
EB
= 0
I
C
/I
B
= 10
100
70
50
30
20
t
f
t
r
V
CC
= 30 V
I
C
/I
B
= 10
10
7.0
5.0
10
20
30
50
70
100
200
300
500
10
7.0
5.0
10
20
30
50
70
100
200
300
500
I
C
, COLLECTOR CURRENT (mA)
I
C
, COLLECTOR CURRENT (mA)
Figure 5. Turn−On Time
Figure 6. Rise and Fall Times
300
200
t s
′
, STORAGE TIME (ns)
t
s
′
= t
s
− 1/8 t
f
I
B1
= I
B2
I
C
/I
B
= 10 to 20
t f , FALL TIME (ns)
100
70
50
30
20
I
C
/I
B
= 10
I
C
/I
B
= 20
V
CC
= 30 V
I
B1
= I
B2
100
70
50
10
7.0
30
10
20
30
50
70
100
200
300
500
5.0
10
20
30
50
70
100
200
300
500
I
C
, COLLECTOR CURRENT (mA)
I
C
, COLLECTOR CURRENT (mA)
Figure 7. Storage Time
Figure 8. Fall Time
SMALL−SIGNAL CHARACTERISTICS
NOISE FIGURE
V
CE
= 10 Vdc, T
A
= 25°C; Bandwidth = 1.0 Hz
10
8.0
NF, NOISE FIGURE (dB)
I
C
= 1.0 mA, R
S
= 150
W
I
C
= 500
mA,
R
S
= 200
W
I
C
= 100
mA,
R
S
= 2.0 kW
I
C
= 50
mA,
R
S
= 4.0 kW
R
S
= OPTIMUM
RS =
SOURCE
RS =
RESISTANCE
10
f = 1.0 kHz
8.0
NF, NOISE FIGURE (dB)
I
C
= 50
mA
I
C
= 100
mA
I
C
= 500
mA
I
C
= 1.0 mA
6.0
6.0
4.0
2.0
0
0.01 0.02 0.05 0.1 0.2 0.5 1.0 2.0 5.0
f, FREQUENCY (kHz)
4.0
2.0
0
10
20
50
100
50
100 200
500 1.0 k 2.0 k
5.0 k 10 k 20 k
50 k 100 k
R
S
, SOURCE RESISTANCE (OHMS)
Figure 9. Frequency Effects
Figure 10. Source Resistance Effects
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