參數(shù)資料
型號: 934031450115
廠商: NXP SEMICONDUCTORS
元件分類: 小信號晶體管
英文描述: UHF BAND, Si, N-CHANNEL, RF SMALL SIGNAL, MOSFET
封裝: MICRO MINIATURE, PLASTIC, SMD, CMPAK-4
文件頁數(shù): 11/12頁
文件大?。?/td> 94K
代理商: 934031450115
1997 Sep 05
8
Philips Semiconductors
Product specication
N-channel dual-gate MOS-FET
BF998WR
Fig.15 Gain control testcircuit at f = 200 MHz.
VDD = 12 V; GS = 2 mS; GL = 0.5 mS.
L1 = 45 nH; 4 turns 0.8 mm copper wire, internal diameter 4 mm.
L2 = 160 nH; 3 turns 0.8 mm copper wire, internal diameter 8 mm.
Tapped at approximately half a turn from the cold side, to adjust GL = 0.5 mS. C1 adjusted for GS = 2 mS.
VAGC
1 nF
50
input
50
input
1 nF
L1
L2
20
H
47
F
1 nF
47
k
1.8
k
360
140 k
1 nF
VDD
15 pF
10 pF
100
k
330
k
Vtun
D1
BB405
C1
5.5 pF
330
k
D2
BB405
input
Vtun
output
MGC481
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