3SK252 Datasheet, PDF (5/6 Pages) NEC – RF AMPLIFIER FOR CATV TUNER N-CHANNEL Si DUAL GATE MOS FIELD-EFFECT TRANSISTOR 4 PINS MINI MOLD

3SK252
GPS AND NF TEST CIRCUIT AT f = 470 MHz
VG2S
1 000 pF
22 kΩ
1 000 pF
Ferrite Beads
INPUT ^{40 pF}
50 Ω
L1
1 000 pF
15 pF
22 kΩ
15 pF
L2
40 pF OUTPUT
50 Ω
1 000 pF
L3
1 000 pF
VG1S
1 000 pF
VDS
L1 : φ1.2 mm U.E.W φ 5 mm 1T
L2 : φ1.2 mm U.E.W φ 5 mm 1T
L3 : REC 2.2 µ H
NF TEST CIRCUIT AT f = 55 MHz
INPUT
50 Ω
VG2S
VDS
2.2 kΩ
RFC
Ferrite Beads
1 500 pF
1 000 pF
27 pF
3.3
kΩ
47 kΩ
47 kΩ
1 000 pF
1 500 pF
27 pF
3.3 kΩ
OUTPUT
50 Ω
VG1S
5