2SC2471 Datasheet, PDF (4/7 Pages) Hitachi Semiconductor – Silicon NPN Epitaxial

2SC2471
Base Time Constant vs.Collector Current
50
VCB = 10 V
40
f = 31.8 MHz
30
20
10
0
4
8
12 16 20
Collector Current I_C (mA)
Output Admittance vs. Frequency
100
50
V_CB = 10 V
I_C = 5 mA
Common Base
20 _{yob = gob + jbob}
10
5
b_ob
2
1.0
0.5
0.2
0.1
100
g_ob
200
500
Frequency f (MHz)
1,000
Input Admittance vs. Frequency
100
50
b_ib
20 VCB = 10 V
10
I_C = 5 mA
Common Base
g_ib
5 y_ib = g_ib + jb_ib
2
1.0
0.5
0.2
0.1
100
200
500
Frequency f (MHz)
1,000
Forward Transfer Admittance vs.
Frequency
100
80
60
V_CB = 10 V
I_C = 5 mA
b_fb
40 ^{Common Base}
20 ^{yfb = gfb + jbfb}
0
g_fb
–20
–40
–60
–80
–100
100
200
500
Frequency f (MHz)
1,000
4