BFP405 Datasheet, PDF (7/7 Pages) Siemens Semiconductor Group – NPN Silicon RF Transistor (For low current applications For oscillators up to 12 GHz)

SIEGET
25 BFP405
Noise figure F = f (I_C)
V_CE = 2 V, Z_S = Z_Sopt
Noise figure F = f (I_C)
V_CE = 2 V, f = 1.8 GHz
4.0
dB
4.0
dB
3.0
2.5
2.0
1.5
1.0
0.5
0.0
0
2
4
6
Noise figure F = f ( f )
V_CE = 2 V, Z_S = Z_Sopt
f = 6 GHz
f = 5 GHz
f = 4 GHz
f = 3 GHz
f = 2.4 GHz
f = 1.8 GHz
f = 0.9 GHz
8 ^mA
12
I_C
3.0
dB
3.0
2.5
2.0
1.5
ZS = 50 Ohm
1.0
ZS = ZSopt
0.5
0.0
0
2
4
6
8
mA
12
I_C
Source impedance for min.
Noise Figure versus Frequency
V_CE = 2V, I_C = 2mA / 5 mA
+j50
+j25
+j100
2.0
1.5
1.0
IC = 5 mA
IC = 2 mA
0.5
0.0
0.0
1.0
2.0
3.0
4.0 ^GHz
6.0
f
7
+j10
0
10
4GHz
5GHz
3GHz
6GHz
25
50 100
1.8GHz
0.9GHz
2mA
5mA
-j10
-j25
-j100
-j50
Aug-20-2001