Random Number Generation from Unbounded Chaos Synthesized by a Practical Phase-Locked Loop

This study exhibits a design of a random number generator (RNG) circuit, which uses no additional component to a simple phase-locked loop (PLL) device. The designed circuit has been benchmarked with both chaotic signal observations and statistical randomness tests provided by NIST without any post-processing step. The fabricated circuit contains no additional entropy source to generate random bit sequences. Needed randomness is acquired by PLL's itself in form of white noise shape. Required white noise is measured demonstrating flat power spectrum over 1.505MHz central oscillation frequency. Compared to previous works, it is first of its kind while it has no additional source of randomness.