How to measure noise spec of a block?

[RickLi]

hi all,

I am quite confused of the noise spec such as noise figure and root mean square noise voltage. And, how to measure them? Can you provide me some reference?

Thanks.

 

[prajit]

Noise Figure (NF) specifies how much additional noise ur system will contribute in addition to the input noise.
How to measure NF ..Please check maxim-ic Application note

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Noise is random quantity..there rms value gives the measure magnitude of how a signal is varyingy. especially when it varies in positive and negative direction

Read this edn article..how to measure
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Read this article to know more about RMS value
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[RickLi]

Thanks, prajit, you helped a lot!

 

[prajit]

Wish you all the best....