finerain22
Newbie level 6
I am a new comer to Sigma-Delta Modulator.
Now I working on a two order SDM, ENOB=13bit
Fist I do ideal simulation in Matlab, and find the output swing of integrator is -3v~+3v
But 3.3v transistors are used in our design, does this means the design in Matlab is improper, I have to choose a another set of coefficients?
Another question, in the textbook Intorductio to Sigma-Delta Modulators(Schreier), there is a chaper discribs example circuits. The author said on the book, due to the simulation in Matlab only use one as unit, the designer to do some conversion from unitless form to real voltage. Does this scaling or denormalization will effect the integrator output swing? and why?
Now I working on a two order SDM, ENOB=13bit
Fist I do ideal simulation in Matlab, and find the output swing of integrator is -3v~+3v
But 3.3v transistors are used in our design, does this means the design in Matlab is improper, I have to choose a another set of coefficients?
Another question, in the textbook Intorductio to Sigma-Delta Modulators(Schreier), there is a chaper discribs example circuits. The author said on the book, due to the simulation in Matlab only use one as unit, the designer to do some conversion from unitless form to real voltage. Does this scaling or denormalization will effect the integrator output swing? and why?