Received Signal

Discussion in 'The Projects Forum' started by simply_me, Jun 9, 2010.

  1. simply_me

    Thread Starter Member

    May 6, 2010
    50
    0
    Hi,

    I have probably a silly question. If my receives a signal, is it more efficient to filter and then amply or the other way around?

    Thank you.
     
  2. t_n_k

    AAC Fanatic!

    Mar 6, 2009
    5,448
    782
    It's a very general question and the application is unclear. Are you referring to radio frequency work ...? Perhaps you could provide some more details.
     
  3. simply_me

    Thread Starter Member

    May 6, 2010
    50
    0
    It's for an ultrasonic rangefinder on the receiver end to put an amplifier or a bandpass filter first (with center frequency around 40kHz). I did some reading about it and found out that it's common to amplify and then filter.
     
    Last edited: Jun 9, 2010
  4. ELECTRONERD

    Senior Member

    May 26, 2009
    1,146
    16
    What I usually see is a filter right after your signal, then an amplifier, and then yet another filter.
     
  5. Bychon

    Member

    Mar 12, 2010
    469
    41
    How about an amplifier configured as a bandpass amplifier? It's just an amplifier stage with limited frequency response. That way, the signal amplitude doesn't descend into the depths of the background noise and it still gets some frequency limiting applied to it.
     
  6. SgtWookie

    Expert

    Jul 17, 2007
    22,182
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