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1/f noise at zero frequency or dc

  1. Feb 19, 2012 #1
    I read about 1/f noise. It says it is inversely proportional to frequency. What would happen at zero frequency or dc? Will it go to infinity? But when we measure some dc value we don't find any infinite voltage which clearly disproves this equation. What is the reason behind this?

    Thanks in advance
  2. jcsd
  3. Feb 19, 2012 #2
    Come on. Someone answer me this question.
  4. Feb 21, 2012 #3

    Physics Monkey

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    There will always be a cutoff beyond which the 1/f power spectrum is no longer valid. Finite observation time and finite system size will provide such a cutoff. If you have a particular system in mind, we can discuss the physics in more concrete terms.
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