50Hz notch filter

Discussion in 'The Projects Forum' started by dush33, Jun 13, 2009.

  1. dush33

    Thread Starter New Member

    Jun 13, 2009
    1
    0
    Hi all

    I need to desugn a 50Hz notch filter using the Sallen-Key topology.
    I have no idea where to begin.

    Any ideas?

    Thanks.
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,646
    2,344
    Hello,

    Sallen-key filters are used for high and low pass.
    Take a look at the attached PDF on filter techniques.

    Greetings,
    Bertus
     
  3. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    If you have a problem with mains hum and notch out 50Hz then you will be left with harmonics of 50Hz which are 100Hz, 150Hz and more.
     
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