Cob VCB
1.2
IE = 0
f = 1 MHz
Ta = 25°C
1.0
0.8
0.6
0.4
0.2
0
0 5 10 15 20 25 30
Collector-base voltage VCB (V)
2SC3931
GP IE
40
f = 100 MHz
Rg = 50 Ω
Ta = 25°C
30
VCE = 10 V
6V
20
10
0
− 0.1
−1
−10
−100
Emitter current IE (mA)
NF IE
12
f = 100 MHz
Rg = 50 kΩ
Ta = 25°C
10
8
6
4
VCE = 6 V, 10 V
2
0
− 0.1
−1
−10
−100
Emitter current IE (mA)
bie gie
20 yie = gie + jbie
VCE = 10 V −4 mA
150
100
16
−2 mA
100
−7 mA
12
58
8
58
25
4
25
f = 10.7 MHz
0
0
3
6
9
12 15
Input conductance gie (mS)
bre gre
0
yre = gre + jbre
VCE = 10 V
−1
10.7
25
−4 mA
−2
−1 mA
58
−3
IE = −7 mA
−4
100
−5
f = 150 MHz
−6
− 0.5 − 0.4 − 0.3 − 0.2 − 0.1 0
Reverse transfer conductance gre (mS)
bfe gfe
0
10.7
−1 mA 100
58
−20
150
−2 mA
−40
−4 mA 150 100
58
−60 f = 150 MHz
IE = −7 mA 100
−80
−100
−120
0
yfe = gfe + jbfe
VCE = 10 V
20 40 60 80 100
Forward transfer conductance gfe (mS)
boe goe
1.2
150
−2 mA
1.0
−4 mA
100
0.8
−7 mA
0.6
58
0.4
25
0.2
0
0
f = 10.7 MHz
0.1 0.2
yoe = goe + jboe
VCE = 10 V
0.3 0.4 0.5
Output conductance goe (mS)
SJC00142BED
3