MRF448 Datasheet, PDF (4/5 Pages) Motorola, Inc – RF POWER TRANSISTOR NPN SILICON

20
C_P
16
12
R_P
8
5000
V_CC = 50 V
I_CQ = 250 mA
P_out = 250 W PEP
4000
3000
2000
4
1000
0
1.5 2
4
7
0
10
15 20
30
f, FREQUENCY (MHz)
Figure 8. Output Resistance and Capacitance
versus Frequency
30
15
7.0
Z_o = 10 Ω
4.0
f = 2.0 MHz
V_CC = 50 V
I_CQ = 150 mA
P_out = 250 W PEP
f
Z_in
MHz
Ohms
2.0
4.50 - j1.40
4.0
3.10 - j1.80
7.0
1.70 - j1.75
15
0.80 - j1.25
30
0.60 - j0.75
Figure 9. Series Equivalent Impedance
4