NE681 Datasheet, PDF (11/21 Pages) NEC – NECs NPN SILICON HIGH FREQUENCY TRANSISTOR

NE681 SERIES
TYPICAL COMMON EMITTER SCATTERING PARAMETERS (TA = 25°C)
NE68139
VCE = 8 V, IC = 7 mA
FREQUENCY
S11
(MHz)
MAG
ANG
100
200
300
400
500
600
700
800
900
1000
1100
1200
1300
1400
1500
2000
3000
4000
5000
0.764
0.675
0.569
0.481
0.432
0.398
0.374
0.354
0.339
0.332
0.333
0.343
0.332
0.343
0.348
0.414
0.502
0.595
0.650
-28
-55
-76
-94
-110
-120
-133
-141
-152
-159
-166
-174
180
173
171
150
126
110
97
S21
MAG
ANG
17.806 156
15.233 138
12.659 126
10.620 116
8.886 107
7.696 102
6.888
97
6.073
93
5.422
88
4.963
85
4.576
81
4.264
78
3.912
76
3.656
73
3.433
71
2.656
56
1.829
38
1.426
17
1.119
1
S12
MAG
ANG
0.002
53
0.008
70
0.018
61
0.025
59
0.035
59
0.043
58
0.046
59
0.056
59
0.055
60
0.066
61
0.069
62
0.076
62
0.080
63
0.089
63
0.098
66
0.129
60
0.192
60
0.256
50
0.317
44
S22
MAG ANG
0.944
0.855
0.734
0.698
0.602
0.589
0.530
0.522
0.493
0.493
0.488
0.457
0.467
0.449
0.447
0.388
0.323
0.302
0.343
-12
-19
-22
-25
-24
-24
-26
-25
-28
-25
-28
-27
-29
-29
-29
-40
-63
-95
-126
K
MAG¹
(dB)
0.91
39.5
0.54
32.8
0.69
28.5
0.74
26.3
0.86
24.0
0.86
22.5
0.99
21.8
0.97
20.4
1.13
17.7
1.05
17.4
1.08
16.5
1.09
15.7
1.12
14.8
1.09
14.3
1.06
13.9
1.04
11.9
1.00
9.8
0.88
7.5
0.83
5.5
Note:
1. Gain Calculations:
( ). MAG = ^|S21| K ± K ² - 1 When K ≤ 1, MAG is undefined and MSG values are used. MSG = ^|S21| , K = ^{1 + | ∆ | 2 - |S11| 2 - |S22| 2} , ∆ = S11 S22 - S21 S12
|S12|
|S12|
2 |S12 S21|
MAG = Maximum Available Gain
MSG = Maximum Stable Gain