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Modeling >> Behavioral Models >> Behavioral modeling of Sigma Delta + Divider
https://designers-guide.org/forum/YaBB.pl?num=1343149899

Message started by KMB on Jul 24^th, 2012, 10:11am

Title: Behavioral modeling of Sigma Delta + Divider
Post by KMB on Jul 24^th, 2012, 10:11am

Hello all,
I am currently modeling a Sigma delta MASH mod in matlab. I have managed to simulate it and get the Quantization noise PSD (which is just the periodogramme of the output of the Sigma Delta). Now I want to simulate how this noise will translate at the output of the divider.. For this I tried to Map the Sigma delta output to a frequency (fvco/(N+dN)) which is straightforward. Now, if I convert this frequency to a signal (say sine or square), I will get the power spectra at only those particular frequencies that the divider outputs. How do I recover the Sigma delta noise spectrum at the divider output i.e. from the divider output spectrum?

Any help would be appreciated..

Thanks,
KMB

Title: Re: Behavioral modeling of Sigma Delta + Divider
Post by wandola on Nov 15^th, 2015, 5:27pm

can u post ur matlab code about dsm here?