3SK176A Datasheet, PDF (3/6 Pages) NEC – RF AMP. AND MIXER FOR CATV TUNER N-CHANNEL Si DUAL GATE MOS FIELD-EFFECT TRANSISTOR 4 PINS MINI MOLD

3SK176A
OUTPUT CAPACITANCE vs.
GATE2 TO SOURCE VOLTAGE
VDS = 6 V
f = 1 MHz
2.0
ID = 10 mA at VG2S = 3 V
ID = 5 mA at VG2S = 3 V
1.0
0
–1.0
0
1.0 2.0 3.0
4.0
VG2S – Gate 2 to Source Voltage – V
POWER GAIN AND NOISE FIGURE vs.
GATE2 TO SOURCE VOLTAGE
10
20
GPS
10
5
0
f = 470 MHz
ID = 10 mA
(at VDS = 6 V
VG2S = 3 V)
–10
NF
–20
0
–2.0
0
2.0 4.0 6.0
8.0
VG2S – Gate 2 to Source Voltage – V
NF TEST CIRCUIT AT f = 55 MHz
VG2S
VDS
INPUT
50 Ω
2.2 kΩ
1 500 pF
1 000 pF
3.3 kΩ ^{27 pF} 47 kΩ
47 kΩ
RFC
Ferrite
Beads 1 500 pF
27 pF
3.3 kΩ
1 000 pF
OUTPUT
50 Ω
VG1S
3