3SK224 Datasheet, PDF (4/6 Pages) NEC – RF AMPLIFIER FOR UHF TV TUNER N-CHANNEL Si DUAL GATE MOS FIELD-EFFECT TRANSISTOR 4 PINS MINI MOLD

OUTPUT CAPACITANCE vs.
GATE2 TO SOURCE VOLTAGE
2.5 _{ID = 10 mA}
(at VDS = 6 V
VG2S = 3 V)
2.0 ^{f = 1 MHz}
1.5
1.0
0.5
0
–1.0
0
1.0
2.0
3.0
4.0
VG2S – Gate2 to Source Voltage – V
3SK224
POWER GAIN AND NOISE FIGURE vs.
GATE2 TO SOURCE VOLTAGE
10
f = 900 MHz
20
ID = 10 mA
(at VDS = 6 V
VG2S = 3 V)
Gps
10
5
0
–10
NF
–20
0
–2.0
0
2.0
4.0
6.0
8.0
VG2S – Gate2 to Source Voltage – V
900 MHz GPS & NF TEST CIRCUIT
VG2S
1 000 pF
INPUT
50 Ω
47 kΩ
1 000 pF
to 10 pF
to 10 pF
L1
47 kΩ
to 10 pF
to 10 pF
L2
RFC
OUTPUT
50 Ω
1 000 pF
VG1S
1 000 pF
VDD
L1, L2: 35 × 5 × 0.2 mm
4