MMBR941LT1 Datasheet, PDF (15/17 Pages) Motorola, Inc – NPN Silicon Low Noise, High-Frequency Transistors

VCE = 6 V
IC = 5 mA
f NF
(GHz) OPT
Γ_o ^{RN K}
1.0 1.5 dB 0.33 ∠ 77° 14 0.87
j0.5
INPUT
j0.2
j1
j2
1.5
16
15
2.0
14
–j0.2
13 ^3.0
4.0
5.0
VCE = 6 V
IC = 5 mA
f NF
(GHz) OPT
Γ_o
RN K
1.5 1.75 dB 0.26 ∠ 141° 15 0.96
j0.5
OUTPUT
j0.2
INPUT
13
12
11
–j0.2
10
j1
1.75
2.0
3.0
4.0
5.0
j2 ^OUTPUT
–j0.5
–j2
AREA OF INSTABILITY
–j1
0.2
0.5
1
2
f = 1 GHz
Figure 23. MRF947 Series Constant Gain and
Noise Figure Contours
–j0.5
–j2
AREA OF INSTABILITY
–j1
0.2
0.5
1
2
f = 1.5 GHz
Figure 24. MRF947 Series Constant Gain and
Noise Figure Contours
VCE = 1 V
IC = 0.5 mA
f NF
ΓMS
(GHz) OPT NF OPT ^{RN K}
1.0 1.95 dB 0.59 ∠ 72° 30 0.50 _j0.5
INPUT
j0.2
8.4
j1
j2
2
2.1
2.3
87
OUTPUT
–j0.2
–j0.5
–j2
AREA OF INSTABILITY
–j1
0.2
0.5
1
2
f = 1 GHz
Figure 25. MRF947 Series Constant Gain and Noise Figure Contours
MOTOROLA RF DEVICE DATA
MMBR941 MRF947 MRF9411 SERIES
2–15