Principle of Operation (IMAGE) Tokyo Institute of Technology Caption The simple idea underlying the design of the circuit is linking together some ring oscillators having lengths equal to the smallest odd prime numbers, such as 3, 5 and 7 (top). Even a simple sum between sine waves having such periods yields a complicated-looking signal (bottom), but the interactions between real oscillators lead to a much richer scenario. Credit Ludovico Minati Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.