Hi all -- I had a question about the Nyquist-Johnson noise formula:(adsbygoogle = window.adsbygoogle || []).push({});

[itex]

\[

E_{\nu}^{2}d\nu=\frac{4R_{\nu}hd\nu}{e^{h\nu/kT}-1}\]

[/itex]

which of course can be approximated for most purposes as [itex]$ E_{\nu}^{2}d\nu=4R_{\nu}kTd\nu$[/itex].

I'm just wondering why the formula has [itex]$ exp(h\nu/kT)-1$[/itex] in the denominator? I would have expected [itex]$ exp(h\nu/kT)+1$[/itex] as electrons are fermions, so obey Fermi-Dirac statistics as opposed to Bose-Einstein. Sure I'm missing something obvious!

Cheers

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# Resistor Nyquist-Johnson noise formula question

Can you offer guidance or do you also need help?

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