A chaos-based programmable analogue-digital circuit for broadband signal generation

We present the principle and a realisation of an integrated circuit for the generation of time discrete broadband signals. The principle of the circuit is based on deterministic nonlinear systems using Markov maps as the system function. The generated signals behave chaotically. The probability density function, the auto-correlation coefficients and also the power density function of the signal depend on the characteristics of the system map and can be adjusted digitally by the change of its coefficients. The circuit consists of an analogue part which processes the signals and a digital one for storing the parameters of the system. Because the signal generating system is an analogue one the generated signals have an infinite period length. Applications can be found in speech generation, measuring technologies and simulating noise in telecommunication channels