BFP450 Datasheet, PDF (7/7 Pages) Siemens Semiconductor Group – NPN Silicon RF Transistor (For medium power amplifiers)

SIEGET
25 BFP450
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
3.0
dB
2.0
1.5
1.0
f = 4 GHz
f = 3 GHz
f = 2.4 GHz
f = 1.8 GHz
0.5
f = 0.9 GHz
0.0
0
10 20 30 40 50 60 70 80 ^mA 100
I_C
Noise figure F = f ( f )
V_CE = 2 V, Z_S = Z_Sopt
3.0
dB
4.5
dB
3.5
3.0
2.5
2.0
1.5
1.0
ZS = 50Ohm
0.5
ZS = ZSopt
0.0
0
10 20 30 40 50 60 70 80 ^mA 100
I_C
Source impedance for min.
Noise Figure versus Frequency
V_CE = 2 V, I_C = 10 mA / 50 mA
+j50
+j25
+j100
2.0
1.5
1.0
IC = 50 mA
IC = 10 mA
0.5
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5 ^GHz
4.5
f
7
+j10
1.8GHz ^0.9GHz
0
10
25
50 100
2.4GHz
3GHz
10mA
50mA
-j10
4GHz
-j25
-j50
-j100
Aug-20-2001