MMBT3906TT1
www.onsemi.com
5
TYPICAL AUDIO SMALL−SIGNAL CHARACTERISTICS
NOISE FIGURE VARIATIONS
(V
CE
= −5.0 Vdc, T
A
= 25°C, Bandwidth = 1.0 Hz)
f = 1.0 kHz
I
C
= 1.0 mA
I
C
= 0.5 mA
I
C
= 50 mA
I
C
= 100 mA
SOURCE RESISTANCE = 200 W
I
C
= 1.0 mA
SOURCE RESISTANCE = 200 W
I
C
= 0.5 mA
SOURCE RESISTANCE = 2.0 k
I
C
= 100 mA
SOURCE RESISTANCE = 2.0 k
I
C
= 50 mA
Figure 8.
f, FREQUENCY (kHz)
1.0
2.0
3.0
4.0
5.0
0.1
Figure 9.
R
S
, SOURCE RESISTANCE (kW)
0
NF, NOISE FIGURE (dB)
1.0 2.0 4.0 10 20
40
0.2 0.4
0
100
4.0
6.0
8.0
10
2.0
12
0.1 1.0 2.0 4.0 10 20
40
0.2 0.4
100
NF, NOISE FIGURE (dB)
h
fe
, CURRENT GAIN
Figure 10. Current Gain
I
C
, COLLECTOR CURRENT (mA)
70
100
200
300
50
Figure 11. Output Admittance
I
C
, COLLECTOR CURRENT (mA)
h , OUTPUT ADMITTANCE ( mhos)
Figure 12. Input Impedance
I
C
, COLLECTOR CURRENT (mA)
Figure 13. Voltage Feedback Ratio
I
C
, COLLECTOR CURRENT (mA)
30
100
70
10
30
2.0
3.0
5.0
7.0
10
1.0
0.1 0.2 1.0 2.0
5.0
0.5
10
0.5
0.7
2.0
5.0
10
20
1.0
0.2
0.5
oe
h , VOLTAGE FEEDBACK RATIO (X 10 )
re
h , INPUT IMPEDANCE (k
ie
0.1 0.2 1.0 2.0
5.0 10
0.5
0.1 0.2 1.0 2.0
5.0 10
0.5
7.0
5.0
0.1 0.2 1.0 2.0
5.0 10
0.5
m
-4
(V
CE
= −10 Vdc, f = 1.0 kHz, T
A
= 25°C)
50
20
Ω)
0.3 0.7 3.0
7.0
0.3
0.7 3.0 7.0
0.3
0.7
3.0
7.0
0.3 0.7 3.0
7.0
0.3 0.7 3.0
7.0