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3-6
RF2312
Rev C2 010813
3
Application Schematic
5MHz to 50MHz Reverse Path
Application Schematic
10dB Gain
1
2
3
4
8
7
6
5
RF OUT
RF IN
V
CC
NOTE 1:
Optional resistor R
S can be used to maintain the correct bias level at higher supply voltages. This is used to
increase output capability or linearity for signals with high crest factors.
10 nF
10 nF
10
µH
30
Ω
100 nF
100 nF
R
S
1- 2k
Ω
1
2
3
4
8
7
6
5
RF OUT
RF IN
R5 is used to maintain the correct bias level at higher supply voltages and is also required in this configuration. The RC network of R2
and C3 should be kept physically as short as possible. R2 can be adjusted as required to improve the impedance matching. R6 and
R7 reduce the typical gain by increasing the emitter resistance. L1 should be at least 200
Ω reactive at the lowest operating
frequency. C1 and C2 should be less than 10
Ω at the lowest operating frequency. C4 and C5 improve gain flatness.
V
CC=9 -12 V
C1
220 pF
R5
1-2k
Ω
C3
10 nF
R2
470
Ω
R6
7.5
Ω
R7
7.5
Ω
C2
220 pF
L1
330 nH
R1 = 21 - 30
Ω
C4
TBD
C5
TBD
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