True random number generator for use in digital electronic circuit e.g. field programmable gate array, has sampling unit sampling signals delivered on outputs of preceding stage of oscillator with specific integer values

摘要

The generator (100) has an asynchronous ring oscillator (102) that includes L-stages for storing of binary values. A non-reversed output of each L-stage is connected to an input of a following stage (I plus one). A reversed output of each stage is connected to another input of a preceding stage (1 minus J). A sampling unit (104) samples signals delivered on outputs (103.0) of a preceding stage of the oscillator with L being an integer value equal to or higher than 3, I being an integer value between 0 and L-1, and J being an integer value between 1 and L-2.