BFP420 Datasheet, PDF (3/8 Pages) Siemens Semiconductor Group – NPN Silicon RF Transistor (For high gain low noise amplifiers For oscillators up to 10 GHz)

BFP 420
Common Emitter S-Parameters
f
S₁₁
GHz MAG
ANG
MAG
V_CE = 2V, I_C = 20mA
0.01 0.543
-2.5
0.1 0.538
-25.1
0.5 0.448
-99.3
1
0.417 -143.6
2
0.437
176.2
3
0.472
152.8
4
0.53
133.3
6
0.617
109.1
8
0.73
82.5
9
0.788
72.6
10
0.82
67
36.88
35.4
22.87
13.46
6.93
4.59
3.339
2.15
1.46
1.2
1
S₂₁
ANG
178.1
164.4
120.8
96.3
71.5
54.4
38.9
12.9
-16.8
-30.4
-39.5
S₁₂
MAG
ANG
0.0009
0.0075
0.0272
0.0398
0.062
0.09
0.115
0.156
0.172
0.174
0.172
95.8
79.3
58.7
55.2
53.5
48.6
40.5
25.3
5.4
-5
-11.3
S₂₂
MAG
ANG
0.96
0.946
0.633
0.399
0.227
0.134
0.109
0.136
0.229
0.319
0.405
-0.6
-12.3
-45.2
-60.3
-77.1
-96.7
-144.5
144.1
101.3
86.1
78.6
Common Emitter Noise Parameters
f
F_min ¹⁾ G_a ¹⁾
Γ_opt
R_N
GHz dB
dB
MAG
ANG
Ω
V_CE = 2V, I_C = 5mA
0.9
0.9
20.5
0.19
30
8.7
1.8 1.05
15.2
0.11
64
7.5
2.4 1.25
13
0.11
116
7
3
1.38
12.1
0.19
165
6.5
4
1.55
10.3
0.28
-155
7
5
1.75
8.6
0.37
-130
10
6
2.2
6.4
0.44
-117
15
1) Input matched for minimum noise figure, output for maximum gain
r_n
F_50Ω ²⁾ |S₂₁|^{2 2)}
-
dB
dB
0.17
1.02
20.3
0.15
1.11
15.8
0.14
1.32
13.5
0.13
1.48
11.6
0.14
1.83
9.1
0.2
2.2
7
0.3
3.3
5.3
2) Z_S = Z_L = 50Ω
For more and detailed S- and Noise-parameters please contact your local Siemens
distributor or sales office to obtain a Siemens Application Notes CD-ROM or see Internet:
http://www.siemens.de/Semiconductor/products/35/35.htm
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