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scaling of coefficients in sigma delta modulators

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pankaj jha

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Dear all'
I am trying to design a a 3rd order ΣΔ modulator adc. I am using the Delta Sigma Toolbox by Richard Schreier.
I wish to limit the swing of each of my integrators between -0.9V to +0.9V. The toolbox gives the function

" [ABCDs,umax]=scaleABCD(ABCD,nlev=2,f=0,xlim=1,ymax=nlev+5,umax,N=1e5) "

Can anyone help me how to give the arguments in this function??
 

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