Concealed attractor chaotic circuit with stable equilibrium points

Abstract

The present invention provides a concealed attractor chaotic circuit with stable equilibrium points. The circuit comprises a first channel, a second channel and a third channel. The first channel output signals are fed back to the input terminal of the third channel, are taken as the input signals of the third channel and are connected with the input pin of a multiplier A2 in the third channel; the second channel output signals are fed back to the input end of the third channel, are taken as the input signal of the third channel, and are connected with the input pin of the multiplier A2 in the third channel, and the prior level signals of the second channel output signals are connected with two input pins of the multiplier A1 in the third channel; and the third channel output signals are fed back to the input end of the third channel and are taken as the input signals of the third channel. The structure is simple, the generated chaotic signal attraction region is small, the attractor has good concealing, and the concealed attractor chaotic circuit with stable equilibrium points has good reference values and application prospects in the fields such as the non-linear (chaotic) signal generation, secret communication and character and image encryption.

Description

technical field [0001] The invention relates to the technical fields of secure communication and nonlinear circuits, in particular to a hidden attractor chaotic circuit with a stable equilibrium point. Background technique [0002] In the 1960s, Lorenz, a scientist at the Massachusetts Institute of Technology, discovered the first chaotic system in the weather convection model, namely the Lorenz system. Since then, many scientific workers have proposed many chaotic systems according to Lorenz, such as Chen system, LV system, Liu system, T system, Qi system, Yang-Chen system, etc., and the construction of such systems is a chaotic system in the Shilnikov sense (with saddle coke type homoclinic and heteroclinic orbit). In recent years, with the research on the structure of chaotic system (chaos mechanism), it has shifted from the chaotic system in the Shilnikov sense to the chaotic system in the non-Shilnikov sense, from the chaotic system with saddle-focus equilibrium point ...

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Problems solved by technology

[0004] At present, the chaotic system with a stable equilibrium point is an important part of the hidden attractor. Such systems are relatively rare, and the attractor has strong concealment. If such a chaotic system is used in the communication security device to encrypt the communication effect will be more complicated

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