1/f noise at zero frequency or dc

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SUMMARY

The discussion centers on the behavior of 1/f noise at zero frequency (DC) and its implications. It is established that 1/f noise is inversely proportional to frequency, but at zero frequency, the power spectrum does not approach infinity due to practical limitations such as finite observation time and system size. These factors introduce a cutoff beyond which the 1/f power spectrum is no longer applicable, clarifying why infinite voltage is not observed in DC measurements.

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  • Understanding of 1/f noise and its characteristics
  • Familiarity with power spectral density concepts
  • Knowledge of measurement techniques in electrical engineering
  • Basic principles of finite observation time and system size effects
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iVenky
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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
 
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Come on. Someone answer me this question.
 
There will always be a cutoff beyond which the 1/f power spectrum is no longer valid.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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