DESIGN APPLICATION NOTE --- AN022
SGA-9289 Amplifier Application Circuits
Typical Performance - 870-960 MHz Application Circuit (V
CE
=3V, I
CQ
=315mA, 25°C)
S-Parameters vs Frequency
20
18
Gain
P1dB, OIP3 vs Frequency
0
-6
-12
-18
27.5
42
41
26.5
25.5
24.5
23.5
22.5
0.87
OIP3 @ 10 dBm/tone
P1dB
Isolation (dB)
P1dB (dBm)
OIP3 (dBm)
Gain (dB)
16
14
12
10
0.8
0.85
0.9
0.95
1
Isolation
40
39
38
37
0.96
-24
-30
0.90
0.93
Frequency (GHz)
S-Parameters vs Frequency
Pout (dBm), Gain (dB)
0
-5
30
25
20
Frequency (GHz)
Pout, Gain, Ic vs Pin
350
Pout
IRL, ORL (dB)
340
-10
-15
-20
-25
-30
-35
0.8
0.85
0.9
IRL
ORL
Ic (mA)
330
Gain
15
10
5
Ic
320
310
300
0
4
8
12
16
0.95
1
Frequency (GHz)
OIP3 vs Tone Level
41
40
Pin (dBm)
Noise Figure vs Frequency
5
Noise Figure (dB)
4
3
2
1
0
0.87
OIP3 (dBm)
39
38
37
36
6
8
10
12
14
16
0.90
0.93
0.96
Pout / Tone (dBm)
Frequency (GHz)
Freq
(GHz )
0.880
0.915
0.945
P 1d B
(dBm)
25.6
25.5
25.4
OIP3
(dBm)
38.7
38.6
38.6
Gain
(dB)
17.3
17.0
16.8
S11
(dB)
-25.7
-29.7
-33.0
S 22
(dB)
-7.9
-8.7
-9.6
NF
(dB)
2.5
2.5
2.6
522 Almanor Ave., Sunnyvale, CA 94085
Phone: (800) SMI-MMIC
4
http://www.stanfordmicro.com
EAN-101535 Rev A
STANFORD [ STANFORD MICRODEVICES ]
