3SK222 Datasheet, PDF (5/6 Pages) NEC – RF AMPLIFIER FOR FM TUNER AND VHF TV TUNER N-CHANNEL Si DUAL GATE MOS FIELD-EFFECT TRANSISTOR 4 PINS MINI MOLD

NF TEST CIRCUIT AT f = 55 MHz
INPUT
50 Ω
VG2S
VDS
2.2 kΩ
RFC
Ferrite
Beads
1 500 pF
1 500 pF
1 000 pF
27 pF
3.3 kΩ
47 kΩ
47 kΩ
27 pF
3.3 kΩ
1 000 pF
3SK222
OUTPUT
50 Ω
VG1S
GPS AND NF TEST CIRCUIT AT f = 200 MHz
VG2S
1 000 pF
22 kΩ
1 000 pF
Ferrite Beads
INPUT 7 pF
50 Ω
L1
1 000 pF
15 pF
22 kΩ
1 000 pF
15 pF
L2
7 pF OUTPUT
1 000 pF
50 Ω
L3
1 000 pF
1 000 pF
VG1S
VDS
L1: φ 0.6 mm U.E.W φ 7 mm 3 T
L2: φ 0.6 mm U.E.W φ 7 mm 3 T
L3: RFC 2.2 µH
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