[About the adjustment of filters and comparators for the automatic interval-analysis (author's transl)]

The selective effect produced by an analog filter followed by a comparator, is represented in the voltage-frequency-plane by a frequency-dependent threshold of sensitivity and a scatter-diagramm, which is characterising the signal. The variation of the threshold, caused by differentiation of the signal, is described. Following this model it is discussed, how deviations of real circuits and real signals from certain assumptions influence the formation of intervals and the interval-histogram. It is stated, which values of the parameters of adjustment should be set, on the one hand, in order to minimize errors of the interval-length and maximize frequencies of intervals in the pass-band and, on the other hand, to provide for the chance of separating from the histogram such intervals which are inevitably subject to bigger faults.--Other criteria of optimization are pointed out. Technically caused limitations for the variation of parameters are mentioned. The application of the model, which is valid for analog signals in general, is demonstrated by two examples from the automatic analysis of EEG.