X P L A N AT I O N : F P G A 1 0 1
Ins and Outs of Digital Filter Design and Implementation FPGAs make it easy to implement many types of digital signal-processing filters effectively. by Adam P. Taylor Principal Engineer EADS Astrium aptaylor@theiet.org
ilters are a key part of any signal-processing system, and as modern applications have grown more complex, so has filter design. FPGAs provide the ability to design and implement filters with performance characteristics that would be very difficulty to re-create with analog methods. What’s more, these digital filters are immune to certain issues that plague analog implementations, notably component drift and tolerances (over temperature, aging and radiation, for high-reliability applications). These analog effects significantly degrade the filter performance, especially in areas such as passband ripple.
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Xcell Journal
First Quarter 2012