piclist 2001\01\20\110155a >
Thread: What is IIR filter?
www.piclist.com/techref/microchip/math/filter.htm?key=filter
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face BY : mike@.....whitewing.co.uk



On Sat, 20 Jan 2001 06:43:57 MST, you wrote:

>Good day to everyone!
>What is IIR filter?
Infinite-Impulse Response (As opposed to Finite Impulse Response),
usually a recursive filter, where part of the output is fed back into
the input, so in principle an inpulse can affect the output for an
infinite amount of time, if the coefficients are right (or wrong...)

A FIR filter sums the output of a fixed number of samples, so an
impulse will only have an effect for a finite time.
>It is a software or hardware digital filter?
Yes!

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