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FRACTALS IN AN ELECTRONIC CIRCUIT WITH BY SWITCHING INPUTS

JUN NISHIKAWA

Department of Applied Physics, Hokkaido University, Sapporo 060-8628, Japan

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and

KAZUTOSHI GOHARA

Department of Applied Physics, Hokkaido University, Sapporo 060-8628, Japan

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https://doi.org/10.1142/S0218127402004772Cited by:8 (Source: Crossref)

Abstract

We have proposed a process of generating fractals not from the results of chaotic dynamics, but from the switching of ordinary differential equations. This paper experimentally and numerically analyzes the dynamics of an electronic circuit driven by stochastically switching inputs. The following two results are obtained. First, the dynamics is characterized by a set Γ(C) of trajectories in the cylindrical phase space, where C is a set of initial states on the Poincaré section. Γ(C) and C are attractive and unique invariant fractal sets that satisfy specific equations. The second result is that the correlation dimension of C is in inverse proportion to the interval of the switching inputs. These two findings move beyond the conventional theory based on contraction maps. It should be noted that the set C is constructed by noncontraction maps.

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