Figure 4

Analog to digital conversion of chaotic signal. (a) A 100 ns trace of experimentally observed chaotic oscillations, digitized at 40 GHz (blue line) and 1.25 GHz (red circles). (b) 1st and 4th order discrete derivatives of the SL oscillations sampled at 1.25 GHz and presented in panel (a). (c) Linear combination of 4 recorded superlattice oscillation traces, digitized at 40 GHz. Taken from [15] with permission. Material copyrighted by the American Physical Society.