vivkr
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Hi Glacier,
I thought it would have been in the "Books" section of this website, but I see that it is not mentioned. That is a serious omission. Anyway, the book is called "Delta-Sigma Data Converters: Theory, Design, and Simulation". The authors are Norsworthy, Schreier and Temes. The book is published by IEEE Press. This book has more information on analog circuit design in Chapter 11 by Brian Brandt, Paul Ferguson and Mike Rebeschini.
The other book is "Understanding Delta-Sigma Converters" by Schreier and Temes, and also by IEEE Press. This is more for system design.
Unfortunately, both the books are quite expensive. Maybe you can try getting the first one second hand (as it has been around for a few years) or look in your library.
Other than that, a few tips:
1. The opamp design constraints are similar to those for switched-capacitor filters. So any good text on SC circuits will be helpful to you in determining noise, bandwidth, gain etc. Try the one by Gregorian and Temes titled "Analog MOS Integrated Circuits for Signal Processing", again an expensive book and around for a while.
2. As you are designing MASH, you need to be particularly careful of the noise leakage due to the mismatch between the analog and digital paths which is usually the big issue in MASH. There are several papers on the subject in IEEE journals with techniques to correct for these. As I have only made single-loop modulators myself, that is more or less all I can tell you.
Hope that you find this information useful.
Regards Vivek
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