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Digital down-converters (DDC) are a key component for digital radio. The DDC performs the critical frequency translation needed to recover the information from a digitized modulated signal. Thanks to the high-level of interest in digital radio, the market for DDC devices is soaring. Typically, a designer will select an off-the-shelf application-specific- standardpart (ASSP) for this task. Although the costs of these parts have fallen precipitously in the face of market demand, ASSPs don’t offer the design flexibility or integration attainable in an FPGA.
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