Abstract: A random number generation method uses a discrete chaotic system. An implementation of the discrete chaotic system uses a first function made up of an integer number n of second affine functions which, for an input value in the range from zero to one, zero and one inclusive, provide an output value in the range from zero to one, zero and one inclusive.

Abstract: A circuit for the measurement of time intervals includes a generator providing primary periodic pulses, a frequency divider capable of transmitting secondary periodic pulses for scaling down the frequency of the primary periodic pulses, and a counter for counting the secondary periodic pulses transmitted during the measured time interval. The frequency divider is programmable by a digital factor which determines the frequency division. The circuit further includes a self-calibration circuit for modifying the digital factor as a function of the number of pulses counted by the counter during a previous time interval measurement.