LG U8138 Service Manual page 85

3. TECHNICAL BRIEF
D. IF Band Bass Filter (IFBP)
The IF filter suppresses spurious signals and eliminates unwanted frequency components generated
in the IQ modulator and subsequently amplified in the VGA. The filter is tuned using an external RLC
load as shown in Figure 3-12.
Figure 3-12. Principle Schematic of the IFBP.
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