4 / 8 page
10-12
RF2609
Rev B3 000822
10
Application Schematic
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
10 nF
10 nF
R2:
1 k
Ω
C2
C2
L1
C1
L1
C1
V
CC
10 nF
V
CC
CDMA Filter
OUT+
OUT-
IN+
IN-
Measurement
Reference Plane
Z
IN=1 kΩ
Z
S=1 kΩ
Z
OUT=1 kΩ
Z
LOAD=1 kΩ
R2 sets the balanced output impedance to 1 k
Ω. L1 and C2
serve dual purposes. L1 serves as an output bias choke,
and C2 serves as a series DC block. In addition, the values
of L1 and C2 may be chosen to form an impedance
matching network if the load impedance is not 1k
Ω.
Otherwise, the values of L1 and C1 are chosen to form a
parallel-resonant tank circuit at the IF when the IF filter's
input impedance is 1 k
Ω.
Z
LOAD,EFF=500 Ω
Measurement
Reference Plane
10 nF
10 nF
3.3 k
Ω
GAIN
GAIN
CONTROL
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
