Filters

Discussion in 'General Electronics Chat' started by swap.bhikule, Aug 29, 2011.

  1. swap.bhikule

    Thread Starter New Member

    Aug 25, 2011
    3
    0
    how can i built a filter? such that it allows single word.. Frequency may vary.. Can i use op-amp for that??? Means op-amp as active filter???? Or is there other device????
     
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