Infinite Impulse Response

Infinite Impulse Response

Infinite impulse response (IIR) is a property of signal processing systems. Systems with this property are known as IIR systems or, when dealing with filter systems, as IIR filters. IIR systems have an impulse response function that is non-zero over an infinite length of time. This is in contrast to finite impulse response (FIR) filters, which have fixed-duration impulse responses. The simplest analog IIR filter is an RC filter made up of a single resistor (R) feeding into a node shared with a single capacitor (C). This filter has an exponential impulse response characterized by an RC time constant. Because the exponential function is asymptotic to a limit, and thus never settles at a fixed value, the response is considered infinite.

Read more about Infinite Impulse Response:  Implementation and Design, Transfer Function Derivation, Description of Block Diagram, Stability, Example, Applications

Famous quotes containing the words infinite, impulse and/or response:

    i thank You God for most this amazing
    day: for the leaping greenly spirits of trees
    and a blue true dream of sky; and for everything
    which is natural which is infinite which is yes
    —E.E. (Edward Estlin)

    If the oarsmen of a fast-moving ship suddenly cease to row, the suspension of the driving force of the oars doesn’t prevent the vessel from continuing to move on its course. And with a speech it is much the same. After he has finished reciting the document, the speaker will still be able to maintain the same tone without a break, borrowing its momentum and impulse from the passage he has just read out.
    Marcus Tullius Cicero (106–43 B.C)

    The reason can give nothing at all Like the response to desire.
    Wallace Stevens (1879–1955)