BF994 データシートの表示（PDF） - Vishay Semiconductors
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BF994 Datasheet PDF : 7 Pages
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BF994S
Vishay Telefunken
2.0
1.8
VG2S=4V
1.6
f=1MHz
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0
0 2 4 6 8 10 12 14 16 18 20
12856
VDS – Drain Source Voltage ( V )
Figure 7. Output Capacitance vs. Drain Source Voltage
10
4V
f= 200MHz
0
3V
2V
–10
1V
–20
0
–30
–0.2V
–0.4V
–0.6V
–40
–0.8V
–50
VG2S=–1V
–60
–2.0 –1.5 –1.0 –0.5 0.0 0.5 1.0 1.5 2.0
12855
VG1S – Gate 1 Source Voltage ( V )
Figure 8. Transducer Gain vs. Gate 1 Source Voltage
20
4V
18 VDS=15V
3V
f=1MHz
16
2V
14
12
1V
10
8
6
4
2
VG2S=0
0.5V
0
0 2 4 6 8 10 12 14 16 18
12850
ID – Drain Current ( mA )
Figure 9. Forward Transadmittance vs. Drain Current
12
f=700MHz
10
8
600MHz
500MHz
6
400MHz
4
300MHz
200MHz
2
50MHz
0
VDS=15V
VG2S=4V
ID=10mA
f=50...700MHz
0 0.5 1.0 1.5 2.0 2.5 3.0
12860
Re (y11) ( mS )
Figure 10. Short Circuit Input Admittance
0
f=50MHz
–4
150MHz
300MHz
–8
500MHz
700MHz
–12
ID=5mA
–16
10mA
VDS=15V
20mA
VG2S=4V
f=50...700MHz
–20
0 2 4 6 8 10 12 14 16 18 20 22
12861
Re (y21) ( mS )
Figure 11. Short Circuit Forward Transfer Admittance
4.0
3.5
f=700MHz
3.0
600MHz
2.5
500MHz
2.0
400MHz
1.5
1.0
0.5
0
0
300MHz
200MHz
50MHz
0.4 0.8
VDS=15V
VG2S=4V
ID=10mA
f=50...700MHz
1.2 1.6 2.0
12862
Re (y22) ( mS )
Figure 12. Short Circuit Output Admittance
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4 (7)
Document Number 85008
Rev. 3, 20-Jan-99
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