Fourier transform analysis of the calorimeter noise problem gives quantitative results on a) the time-height correlation, b) the effect of background on optimal shaping and on the ENC, c) sampling frequency requirements, and d) the relation between sampling frequency and the required quantization error.
@article{arxiv.0902.3986,
title = {Noise in a Calorimeter Readout System Using Periodic Sampling},
author = {Walter R. Innes},
journal= {arXiv preprint arXiv:0902.3986},
year = {2009}
}