[Delta-Sigma Converter] filter gain vs. quantization noise

I'd like to design DSM.
While I study the basic principals in DSM design, there are some questions.
which is the relationship bet. "loop filter gain" and "Quantization noise"?

These documents may help you:
http://icd.el.utwente.nl/temp_files/...b6c244f8d5.pdf
http://www.eecg.toronto.edu/~tcc/iscas03_denis.pdf