LPF design question

Discussion in 'General Electronics Chat' started by jxm1092, Sep 28, 2012.

  1. jxm1092

    Thread Starter Member

    Jul 16, 2012
    30
    0
    Looking at someone else's design of a LPF, but not sure how this correlates to the fc=1/(2*pi*RC) equation. Hoping someone could shed some light on this for me. Thanks.
     
  2. ramancini8

    Member

    Jul 18, 2012
    442
    118
    R=R1||(R3||R4)C1. It is just a voltage divider where R1 is the top leg and Z2 is the lower leg. Do the math.
     
Loading...