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Innovative Integration provides board-level hardware products that integrate the best analog I/O and reconfigurable FPGAs to provide cost-effective solutions for challenging data acquisition and signal processing applications.
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 Definition: In electronics, a digital filter is any electronic filter that works by performing digital mathematical operations on an intermediate form of a signal.
This is in contrast to older analog filters which work entirely in the analog realm and must rely on physical networks of electronic components (such as resistors, capacitors, transistors, etc.) to achieve the desired filtering effect.
Digital filters can achieve virtually any filtering effect that can be expressed as a mathematical function or algorithm.
The two primary limitations of digital filters are their speed (the filter can't operate any faster than the computer at the heart of the filter), and their cost.
However as the cost of integrated circuits has continued to drop over time, digital filters have become increasingly commonplace and are now an essential element of many everyday objects such as radios, cellphones, and stereo receivers.
Source: Wikipedia (http://en.wikipedia.org/wiki/Digital_filters)
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