> the only way to increase precision of multiple analog signals is to digitize it

What do you mean? Digitizing doesn’t increase the precision of anything, it always loses precision. I don’t think you’re summarizing that paper accurately, they are most certainly talking about using analog compute units, specifically analog matrix-vector-multipliers, and a method for increasing the analog signal precision before digitizing the signal. The components used are analog compute circuits, and the title of the paper has “analog” in it. This is absolutely relevant to what I was trying to say because RNS is used here to make multiple analog data lines representing a value provide increased precision compared to a single analog data line.