1. A calibration system for a comparator chain, comprising: a comparator configured for receiving a signal; an unbalancing element coupled to the comparator and configured to add an unbalancing quantity to the signal flow in at least one point of the comparator chain; and a compensation circuit coupled to the comparator and the unbalancing element, the compensation circuit configured to monitor output states of the comparator, to determine if the output states are associated with a desired distribution, and if the output states are not associated with the desired distribution, to adjust the unbalancing quantity based on the current distribution of the output states.