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Design >> Mixed-Signal Design >> loop filter arichitecture in sigma-delta ADC
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Message started by darrenxyz on Jun 21^st, 2007, 8:43pm

Title: loop filter arichitecture in sigma-delta ADC
Post by darrenxyz on Jun 21^st, 2007, 8:43pm

in sigma delta ADC design,
simulink provide four architecture: cifb,crfb ciff,crff,
how to choose one of them?
do anyone have literature which have detailed analysis about the architecture?

Title: Re: loop filter arichitecture in sigma-delta
Post by Berti on Jun 21^st, 2007, 10:31pm

The loop filters are described in R.Schreiers books "Delta-Sigma Data Converters" or
"Understanding Delta-Sigma Data Converters". Or just download Schreiers matlab toolbox
from the matlab-exchange server, where the attached PDF will provide you with the necessary
information.

cifb : cascaded-integrator feedback form
crfb : cascaded-resonator feedback form
ciff : cascaded-integrator feedforward form
crff : cascaded-integrator feedforward form