Friday, 22 April 2016

DESIGN OF BUTTERWORTH FILTER

                   In this experiment we were supposed to find the output of digital Butterworth Filter. First the order of the filter and cut off frequency is calculated. After this normalized transfer function is calculated from which denormalised transfer function is calculated by replacing 's'. Then z transform is obtained by BLT and the output graph of magnitude v/s frequency is observed.

Butterworth
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5 comments:

  1. Unknown25 April 2016 at 09:29

    Analog Butterworth LPF has only poles and no zeros.

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    1. Unknown26 April 2016 at 01:37

      This is because the transfer function of Butterworth filter is of the form: H(s)= 1/(f(s))
      hence it always deal with the poles and not zeros

      Delete
  2. Unknown25 April 2016 at 10:04

    Due to its maximum flat pass band nature it is used as anti-aliasing filter in data converter applications.

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    1. Unknown26 April 2016 at 01:38

      oh! Thanks for the valuable information Pranav

      Delete
  3. Unknown25 April 2016 at 22:36

    It has applications in radars such as in designing the display of radar target track. These are also used in digital filters for motion analysis.

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