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Homework Help: Low pass filter

  1. Dec 13, 2003 #1
    hi there

    if anyone could help i would be very grateful

    for a low pass filter

    from the following list choose the two components which would produce a cut off frequency closest to 100 khz

    resistor capacitor
    1.6 k ohm 1 nf
    33 k ohm 330 nf
    150 k ohm 10 uf

    formula being fc = 1 / 2pi * r * c

    its the exact values for nf and uf that are posing the prob
     
  2. jcsd
  3. Dec 13, 2003 #2
    1.6k and 1 nf
     
  4. Dec 13, 2003 #3
    nf = 10 to the ninth
    uf = 10 to the sixth
     
  5. Dec 13, 2003 #4
    many thanks
     
  6. Dec 14, 2003 #5

    chroot

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    Staff Emeritus
    Science Advisor
    Gold Member

    I think you forgot some minus signs in there.

    - Warren
     
  7. Dec 14, 2003 #6
    Guess I did.
     
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