CIRCUITS AND METHODS FOR GENERATING A THRESHOLD SIGNAL USED IN A MOTION DETECTOR

A circuit to detect a movement of an object provides a threshold selection module or a peak identifier module that uses one or more threshold signals identified prior to a present cycle of magnetic field signal in order to establish a threshold signal used for a present cycle of the magnetic field signal. A method associated with the circuit is also described. The circuit and method can be tailored to store values associated with a least common multiple of a set of possible quantities of detectable features on target objects.An error processor may output an error signal in case that a current value of the peak related signal , e.g. a threshold a value derived from the peak signal, differs significantly from a value derived from stored samples recalled from positions corresponding to prior cycles which occurred an integer multiple of the least common multiple ago.An adjustment processor receives the error signal and adjusts the value of the least common multiple.