This question refers to the link https://pure.tue.nl/ws/portalfiles/portal/1546321/521243.pdf. In chapter 4 it discusses the topic of dead zone, which appears in the delta sigma modulator. Dead zone means that when input signal to the modulator is very small than the output of the modulator will not follow the input, for small input signal the output of the modulator depends on the state of the modulator. The input must be higher than the dead zone to break the repetative pattern of the modulator.
The question: How the the dead zone is related to the filter order of the modulator? In the link it shows for first order filter but not much is written about higher order modulator and dead zone.