NST3904DXV6T1G, NSVT3904DXV6T1G, NST3904DXV6T5G, SNST3904DXV6T5G
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5
TYPICAL AUDIO SMALL−SIGNAL CHARACTERISTICS
NOISE FIGURE VARIATIONS
(V
CE
= 5.0 Vdc, T
A
= 25°C, Bandwidth = 1.0 Hz)
Figure 7. Noise Figure
f, FREQUENCY (kHz)
4
6
8
10
12
2
0.1
Figure 8. Noise Figure
R
S
, SOURCE RESISTANCE (k OHMS)
0
NF, NOISE FIGURE (dB)
1.0 2.0 4.0 10 20
40
0.2 0.4
0
100
4
6
8
10
12
2
14
0.1 1.0 2.0 4.0 10 20
40
0.2 0.4
100
NF, NOISE FIGURE (dB)
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 = 500 W
I
C
= 100 mA
SOURCE RESISTANCE = 1.0 k
I
C
= 50 mA
h PARAMETERS
(V
CE
= 10 Vdc, f = 1.0 kHz, T
A
= 25°C)
Figure 9. Current Gain
I
C
, COLLECTOR CURRENT (mA)
70
100
200
300
50
Figure 10. Output Admittance
I
C
, COLLECTOR CURRENT (mA)
h , CURRENT GAIN
h , OUTPUT ADMITTANCE ( mhos)
Figure 11. Input Impedance
I
C
, COLLECTOR CURRENT (mA)
Figure 12. Voltage Feedback Ratio
I
C
, COLLECTOR CURRENT (mA)
30
100
50
5
10
20
2.0
3.0
5.0
7.0
10
1.0
0.1 0.2 1.0 2.0
5.0
0.5
10
0.3 0.5 3.0
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 OHMS)
ie
0.1 0.2 1.0 2.0
5.0 10
0.3 0.5 3.0
0.1 0.2 1.0 2.0
5.0 10
0.3 0.5 3.0
2
1
0.1 0.2 1.0 2.0
5.0 10
0.3 0.5 3.0
fe
m
-4
