ASX420
250-3500 MHz MMIC Amplifier
Frequency (MHz)
935~960
31
-15
-8
29.5
47
7.0
5
370
APPLICATION CIRCUIT
GSM Tx
935 ~ 960 MHz
+5 V
Magnitude S21 (dB)
Magnitude S11 (dB)
Magnitude S22 (dB)
Output P1dB (dBm)
Output IP3
1)
(dBm)
Noise Figure (dB)
Device Voltage (V)
Current (mA)
1) OIP3 is measured with two tones at an output power of +12 dBm/tone
separated by 1 MHz.
Schematic
Vcc=5 V
D1=5.6V
Zener Diode
C6=1
mF
C5=100pF
C8=1
mF
C7=100pF
RF IN
C1=100 pF
C4=100 pF
L2=82 nH
1.5 mm
ASX420
8 mm
C3=5.6 pF
L1=82 nH
(Coil Inductor)
C2=100 pF RF OUT
Board Layout (FR4, 40x40 mm , 0.8T)
2
R1=3
W
S-parameters & K-factor
40
0
35
-5
30
-10
Gain (dB)
25
S11 (dB)
700
800
900
1000
1100
1200
-15
20
-20
15
10
600
-25
600
700
800
900
1000
1100
1200
Frequency (MHz)
10
5
Frequency (MHz)
5
4
0
Stability Factor
700
800
900
1000
1100
1200
3
S22 (dB)
-5
2
-10
1
-15
600
0
0
500
1000
1500
2000
2500
3000
3500
Frequency (MHz)
Frequency (MHz)
6/12
ASB Inc.
·
sales@asb.co.kr
·
Tel: +82-42-528-7223
September 2011