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A feedback method of digital measuring of the rate of statistically distributed pulses is described. The system adapts automatically to the situation at its input. If great changes of measured quantity are observed, the output follows these changes fast with greater standard deviation; later the first "estimation" of the value of measured quantity is further improved. The basic dynamic properties as well aa standard deviation both at transient and steady-state are described and dynamic properties of various methods of digital rate measuring are compared. The desoribed method of rate measuring can be applied also to digital measuring of relative rate n/no or of rate relative difference (n - no)/no.
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V. Polivka (1972) studied this question.
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