A New Analogue Chaotic System for Noise Generation

The present paper introduces a novel analogue nonlinear circuit that exhibit rich dynamics. The proposed fourth order circuit is based on a piecewise linear algebraic nonlinear function, with discontinuity in the origin. The dynamic part of the system is developed by closing two feedback loops around a differential amplifier, which drives the nonlinear circuit. For a wide range of parameter values, the proposed system behaves chaotically, exhibiting dissipative property, sensitivity to the initial condition, unpredictable time evolution and ergodicity. These properties are fit for designing generators of analogue noise with flat power spectrum in a defined frequency band. The paper presents both system analysis properties of the proposed nonlinear system and simulation results, confirming the presented theoretical aspects.