
CDMA IF VGAs and I/Q Demodulators
with VCO and Synthesizer
47pF
2.4kΩ
0.068µF
10kΩ
10kΩ
0.01µF
0.01µF
BYP
BYP
VCC
0.01µF
MAX2308
0.01µF
CP_OUT
BYP
VCC
GND
0.01µF
33pF
FM-
TANKH+
FM+
FM
2pF
33nH
33pF
CDMA+
TANKH-
680Ω
CDMA
VCC
47pF
CDMA-
VGC
VCC
VCC
GND
REF
SHDN
I_OUT+
DATA
EN
CLK
Q_OUT+
47pF
3-WIRE
DAC
VCC
10kΩ
10kΩ
Q
I_OUT-
Q_OUT-
LOCK
47kΩ
VCC
Figure 2. MAX2308 Typical Operating Circuit
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