NE681 SERIES
TYPICAL COMMON EMITTER SCATTERING PARAMETERS (TA = 25°C)
1
90˚
.6
2
S
12
135˚
45˚
3 GHz
S
22
3 GHz
4
.2
S
12
S
21
10
0.5 GHz
S
21
3 GHz
0.05 0.10 0.15
4
0
.2
.6
1
2
10
0.5 GHz
S
22
180˚
0˚
S
11
0.5 GHz
-10
0.5 GHz
2.5
S
11
3 GHz
5
-.2
-4
7.5
Coordinates in Ohms
Frequency in GHz
315˚
225˚
-2
-.6
10
(VCE = 2.5 V, IC = 3 mA)
-1
270˚
NE68139
VCE = 2.5 V, IC = 0.3 mA
FREQUENCY
S11
S21
S12
S22
K
MAG1
(dB)
(MHz)
MAG
ANG
MAG
ANG
MAG
ANG
MAG
ANG
50
100
200
300
400
500
600
800
1000
1500
2000
3000
0.996
0.995
0.990
0.973
0.953
0.931
0.909
0.862
0.819
0.744
0.732
0.762
-3.4
-11.4
-20.3
-30.7
-41.2
-50.3
-60.5
-79.9
-98.5
-140.0
-173.0
142.1
1.089
1.079
1.071
1.032
0.993
0.991
1.008
0.908
0.871
0.729
0.632
0.438
175.2
173.1
161.9
153.6
145.9
137.2
129.9
114.3
101.2
72.2
0.014
0.027
0.050
0.075
0.098
0.122
0.138
0.167
0.184
0.192
0.155
0.089
83.2
80.3
74.5
68.7
64.3
59.3
53.5
42.7
33.4
14.1
3.4
0.995
0.993
0.989
0.985
0.976 -11.4
0.965 -13.8
0.949 -16.4
0.918 -21.0
0.888 -25.0
0.828 -35.2
0.802 -46.3
0.770 -76.7
-1.1
-2.7
-5.7
-8.7
0.13
0.06
0.16
0.19
0.19
0.25
0.28
0.37
0.45
0.66
0.85
1.62
18.9
16.0
13.3
11.4
10.1
9.1
8.6
7.4
6.8
5.8
51.7
28.5
5.0
2.3
8.4
VCE = 2.5 V, IC = 1.0 mA
50
0.985
0.971
0.942
0.914
0.876
0.828
0.790
0.715
0.663
0.596
0.600
0.660
-6.8
-14.8
-27.5
-40.4
-53.8
-65.2
-76.9
-98.4
-117.6
-157.8
173.8
136.9
3.763
3.648
3.497
3.346
3.184
3.043
2.880
2.516
2.237
1.686
1.346
0.941
175.3
171.0
159.1
149.4
140.6
131.8
124.1
109.8
98.4
0.016
0.029
0.050
0.070
0.092
0.106
0.119
0.137
0.145
0.145
0.130
0.144
86.4
82.4
74.3
65.4
58.7
53.8
47.7
38.9
32.3
23.5
24.6
47.4
0.989
0.980
0.963
-2.8
-4.8
-9.5
0.01
0.01
0.10
0.17
0.20
0.25
0.30
0.40
0.49
0.75
1.04
1.21
23.7
21.0
18.4
16.8
15.4
14.6
13.8
12.6
11.9
10.7
8.9
100
200
300
400
500
600
800
1000
1500
2000
3000
0.946 -13.9
0.916 -17.8
0.884 -20.9
0.845 -24.1
0.778 -28.6
0.726 -31.9
0.631 -39.8
0.583 -48.9
0.538 -75.9
74.8
56.9
30.9
5.4
VCE = 2.5 V, IC = 3 mA
50
100
200
300
400
500
600
800
1000
1500
2000
3000
0.916
0.895
0.829
0.755
0.694
0.619
0.574
0.500
0.470
0.453
0.481
0.567
-10.7
-23.5
-42.0
-60.3
-76.4
10.426
9.954
9.011
8.067
7.165
6.329
5.660
4.558
3.815
2.684
2.078
1.442
172.1
164.8
148.6
136.2
125.8
117.1
109.8
97.8
88.7
70.7
56.4
34.1
0.015
0.027
0.046
0.061
0.074
0.083
0.089
0.099
0.106
0.123
0.141
0.197
84.7
79.0
67.6
57.7
52.4
49.8
46.7
43.3
42.0
43.6
47.3
49.7
0.975
0.972
-4.6
-9.6
0.07
0.05
0.19
0.29
0.35
0.43
0.50
0.65
0.77
0.99
1.11
1.08
28.4
25.7
22.9
21.2
19.9
18.8
18.0
16.6
15.6
13.4
9.7
0.910 -18.1
0.826 -24.5
0.754 -29.3
0.690 -32.3
0.634 -34.4
0.552 -37.1
0.496 -38.6
0.412 -43.3
0.362 -51.3
0.302 -78.6
-90.0
-103.0
-125.0
-143.4
-178.4
159.4
130.6
6.9
Note:
1. Gain Calculations:
2
1 + | ∆ |2 - |S11
|
2 - |S22
|
|S21
|S12
|
|
K 2 - 1 ). When K ≤ 1, MAG is undefined and MSG values are used.
∆ = S11 S22 - S21 S12
|S21
|S12
|
|
(K
MAG =
MSG =
, K =
,
2 |S12
S21|
MAG = Maximum Available Gain
MSG = Maximum Stable Gain
CEL [ CALIFORNIA EASTERN LABS ]
