Device for evaluating periodic signals from inductive pick-ups having a pulse former stage influenced as a function of the pick-up signal amplitude

Device for evaluating periodic signals from inductive pick-ups, comprising:

• a peak detector having an output, and an input to which a pick-up signal can be applied from an output of the inductive pick-up in order to influence, as a function of the pick-up signal amplitude, a transition from a first to a second logic state at an output of a downstream pulse former stage having first and second inputs, where the first input is provideable with variable reference signals and the second input with the pick-up signal;
• a pulse generator stage which receives the pick-up signal as an input and generates at an output pulses at a repetition frequency which corresponds to the frequency of the pick-up signal;
• and
• a weighting stage having an output coupled to the pulse former stage, a first input coupled to the output of the peak detector, and a second input coupled to the output of the pulse generator stage, the weighting stage combining the signals from the output of the peak detector and from the output of the pulse generator stage to form said variable reference signal in a predetermined fashion.