vivkr
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Which z-model do you mean???
If it assumes a gain of 1, then there is the general assumption that the quantizer is not being overloaded. For a 1-bit quantizer, I would suggest that one still does not set the gain blindly to 1. However, it is probably used because it is easy to set it to 1. The references I mentioned cover the topic in greater detail.
Regards Vivek
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