MRF2947 Datasheet, PDF (10/12 Pages) Motorola, Inc – LOW NOISE TRANSISTORS

VCE = 6 V
IC = 5 mA
f
NF
(GHz) OPT
Γ_o
RN K
2.0 2.25 dB 0.33 ∠ 116.4° 10.5 1.08
j1
j0.5
VCE = 6 V
IC = 5 mA
f
NF
(GHz) OPT
Γ_o
RN K
1.0 1.55 dB 0.40 ∠ 50° 17 0.89
j1
j2
j0.5
j2 OUTPUT
7
j0.2
8
9
2.25
10
3.0
–j0.2
–j0.5
4.0
5.0
6.0
–j2
–j1
0.2
0.5
1
2
f = 2 GHz
Figure 20. MRF2947 Series Constant Gain and
Noise Figure Contours
j0.2
INPUT
1.55
18
17
16
2.0
15
–j0.2
3.0
4.0
5.0
–j0.5
–j2
Potentially Unstable
–j1
0.2 0.5
1
2
f = 1 GHz
Figure 21. MRF2947 Series Constant Gain and
Noise Figure Contours
VCE = 1 V
IC = 1 mA
f
NF
(GHz) OPT
Γ_o
RN K
2.0 2.57 dB 0.48 ∠ 130.9° 9.4 0.96
OUTPUT
j1
VCE = 1 V
IC = 1 mA
f
NF
(GHz) OPT
Γ_o
RN K
1.0 1.81 dB 0.53 ∠ 63.5° 22 0.49
j1
j0.5
j2
j0.5
j2 OUTPUT
j0.2
2.57
6
7
8
3.0
9
INPUT
4.0
–j0.2
5.0
6.0
–j0.5
–j2
Potentially Unstable
–j1
0.2
0.5
1
2
f = 2 GHz
Figure 22. MRF2947 Series Constant Gain and
Noise Figure Contours
j0.2
INPUT
1.81
2.0
10
3.0
9
–j0.2
8
4.0
7
5.0
–j0.5
–j2
Potentially Unstable
–j1
0.2 0.5
1
2
f = 1 GHz
Figure 23. MRF2947 Series Constant Gain and
Noise Figure Contours
MRF2947AT1,T2 MRF2947RAT1,T2
10
MOTOROLA RF DEVICE DATA