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
0.1µF
RS
MATCHED
FILTERS
4
ADCS
3
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
8 _______________________________________________________________________________________