Direct-Conversion Tuner IC
0.1µF
RS
L1
L2
L3
0.1µF
RS
IOUT IOUT
C1
L1
C2
L2
C3
L3
BASEBAND LP FILTER
C4
RL
DSP
MAX2108
QOUT QOUT
MATCHED
FILTERS
4
ADCS
3
0.1µF
RS
L1
L2
L3
C1
C2
C3
C4
RL
0.1µF
RS
L1
L2
L3
2
1
BASEBAND LP FILTER
FOR POINTS 1, 2, 3, 4, REFER TO THE SIGNAL SPECTRUMS SHOWN IN FIGURE 2
Figure 1. In-Phase and Quadrature-Phase Signal Paths
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