Hello,
are you asking for noise in a bandwidth, right?
For this purpose we have a receiver() equation, see english help on
math functions...
BR, Stefan.
On Tue, September 17, 2013 3:17 pm, chloros wrote:
> Hi qucs community,
>
> i was wondering if there is an easy way to calculate the root mean
> square noise value from the spectral density if the simulation step is
> non linear (logarithmic)?
>
> for linear scale it should be sth like this:
> urms=sqrt(integral(abs(Unoise)^2))
> which (if i am correct) could be implemented as:
> urms=sqrt((max(acfrequency)min(acfrequency))*avg(abs(Unoise.vn)^2))
>
> however that does not hold for logarithmic scaled ACsimulations (i.e.
> acfrequency logarithmic). anybody an idea for an easy solution or do we
> have to fiddle with the logarithmic derivatives?
>
> Best regards!
>
>
>
> 
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