Input Capacitance, C
ISS
(pF)
POWER GAIN AND NOISE FIGURE vs.
GATE 2 TO SOURCE VOLTAGE
Drain Current, ID
(mA)
POWER GAIN AND NOISE FIGURE vs.
DRAIN CURRENT
2.0
1.0
-1.0
0 +1.0
VG2S
= 1 V at I
D
= 10 mA
1
VG2S
= 1 V at I
D
= 5 mA
1
VDS
= 5 V
f = 1kHz
Gate 2 to Source Voltage, VG2S
(V)
INPUT CAPACITANCE vs.
GATE 2 TO SOURCE VOLTAGE
Gate 2 to Source Voltage, VG2S
(V)
NE25139
TYPICAL PERFORMANCE CURVES
(TA
= 25
°C)
Power Gain, G
P
(dB)
Note:
1. Initial bias conditions. VG1S
set to obtain
specified drain current.
Note:
1. Initial bias conditions. VG1S set to obtain
specified drain current.
Noise Figure, NF (dB)
Noise Figure, NF (dB)
Power Gain, G
P
(dB)
30
15
0
-15
-30
-45
-3.0 -2.0 -1.0 0 +1.0 +2.0
0
5
10
GPS
NF
VDS = 5 V
1
VG2S
= 1 V
ID
= 10 mA
f = 900 MHz
25
20
15
10
5
0
0 5 10
0
5
VDS
= 5 V
VG2S
= 1 V
f = 900 MHz
GPS
NF
10
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