BF998 データシートの表示（PDF） - Vishay Semiconductors
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BF998 Datasheet PDF : 10 Pages
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BF998/BF998R/BF998RW
Vishay Semiconductors
10
f = 800 MHz
0
- 10
- 20
4V
3V
2V
1V
0
- 0.2 V
- 30
- 0.4 V
- 40
VG2S = - 0.8 V
- 50
- 1.0 - 0.5 0.0 0.5 1.0 1.5
12818
VG1S - Gate 1 Source Voltage (V)
Figure 7. Transducer Gain vs. Gate 1 Source Voltage
32
VDS = 8 V
28 f = 1 MHz
24
VG2S = 4 V
3V
20
16
2V
12
8
4
1V
0
0
0 4 8 12 16 20 24 28
12819
ID - Drain Current (mA)
Figure 8. Forward Transadmittance vs. Drain Current
5
0
VDS = 8 V
VG2S = 4 V
- 5 f = 100...1300 MHz
f = 100 MHz
- 10
ID = 5 mA
- 15
10 mA
- 20 20 mA
- 25
400 MHz
700 MHz
- 30
1000 MHz
- 35
- 40
1300 MHz
0 4 8 12 16 20 24 28 32
12821
Re (y21) (mS)
Figure 10. Short Circuit Forward Transfer Admittance
9
8
f = 1300 MHz
7
6
1000 MHz
5
4
700 MHz
3
2
1
0
0.00
400 MHz
100 MHz
VDS = 15 V
VG2S = 4 V
ID =10 mA
f = 100...1300 MHz
0.25 0.50 0.75 1.00 1.25 1.50
12822
Re (y22) (mS)
Figure 11. Short Circuit Output Admittance
20
f = 1300 MHz
18
16
14
1000 MHz
12
10
8
6
4
2
0
0
700 MHz
400 MHz
100 MHz
246
VDS = 8 V
VG2S = 4 V
ID = 10 mA
f = 100...1300 MHz
8 10 12 14
12820
Re (y11) (mS)
Figure 9. Short Circuit Input Admittance
Document Number 85011
Rev. 1.8, 05-Sep-08
www.vishay.com
5
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