Integrated circuit generating 3- and 5-scroll attractors

This paper introduces the experimental realization of the first integrated circuit of a multi-scroll continuous chaotic oscillator showing 3- and 5-scroll attractors. It is based on a variant of the Chua’s system. The most relevant issue is the implementation of a saw-tooth-like nonlinear function, which is designed by using floating gate MOS (FGMOS) transistors. Therefore, the realization of a voltage-to-current nonlinear cell by a piecewise-linear approach allows us to have only two external control inputs instead of numerous external voltage references, as usually done in current circuit realizations. Experimental results of the proposed integrated multi-scroll oscillator along with its corner analysis are provided.

► A multiscroll chaotic oscillator is fabricated with integrated circuit technology.
► The oscillator is based on a V–I comparator designed with FGMOS transistors.
► The advantage of the tested circuit is the elimination of external DC references.
► Experimental observation of 3- and 5-scroll attractors is provided.
► Experimental results are in good agreement with theoretical ones.