- #1
fluidistic
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I've been told that the 1/f noise for DC voltmeters is a problem when they measure a very low voltage (i.e. around 1 nV). Some readings can take weeks or even months. However, a DC voltmeter would have no problem to return a stable reading of a simple resistive circuit, of the order of the volt.
Physically I do not understand what's going on and why there's a difference between the 1 nV and the 1 V case regarding the pink noise. I'd like to see equations that would tell me whether the 1/f noise would be a problem, for a DC reading.
Note that DC corresponds to f = 0 Hz, so infinite noise in principle.
Physically I do not understand what's going on and why there's a difference between the 1 nV and the 1 V case regarding the pink noise. I'd like to see equations that would tell me whether the 1/f noise would be a problem, for a DC reading.
Note that DC corresponds to f = 0 Hz, so infinite noise in principle.