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BF998 Datasheet(PDF) 3 Page - Vishay Siliconix

Part No. BF998
Description  N-Channel Dual Gate MOS-Fieldeffect Tetrode, Depletion Mode
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Maker  VISHAY [Vishay Siliconix]
Homepage  http://www.vishay.com
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BF998 Datasheet(HTML) 3 Page - Vishay Siliconix

   
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BF998/BF998R/BF998RW
Vishay Telefunken
www.vishay.de
• FaxBack +1-408-970-5600
Rev. 4, 23-Jun-99
3 (9)
Document Number 85011
Electrical AC Characteristics
VDS = 8 V, ID = 10 mA, VG2S = 4 V, f = 1 MHz , Tamb = 25_C, unless otherwise specified
Parameter
Test Conditions
Symbol
Min
Typ
Max
Unit
Forward transadmittance
y21s
21
24
mS
Gate 1 input capacitance
Cissg1
2.1
2.5
pF
Gate 2 input capacitance
VG1S = 0, VG2S = 4 V
Cissg2
1.1
pF
Feedback capacitance
Crss
25
fF
Output capacitance
Coss
1.05
pF
Power gain
GS = 2 mS, GL = 0.5 mS, f = 200 MHz
Gps
28
dB
g
GS = 3,3 mS, GL = 1 mS, f = 800 MHz
Gps
16.5
20
dB
AGC range
VG2S = 4 to –2 V, f = 800 MHz
DGps
40
dB
Noise figure
GS = 2 mS, GL = 0.5 mS, f = 200 MHz
F
1.0
dB
g
GS = 3,3 mS, GL = 1 mS, f = 800 MHz
F
1.5
dB


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