Switchable chaotic signal source by memristor circuit and nonlinear circuit

Abstract

The invention relates to a switchable chaotic analog circuit based on a Chua chaotic circuit system. The switchable chaotic signal source by a memristor circuit and a nonlinear circuit comprises a Chua chaotic circuit post-stage switchable-mode main circuit which is composed of an integrating circuit, a control switch circuit (S) arranged at the post stage of the integrating circuit, an absolute value function circuit (H(.)) disposed at the post stage of the control switch circuit (S), a first multiplying circuit (M1) mounted at the post stage of the absolute value function circuit (H(.)) and a negative resistance circuit arranged at the post stage of the first multiplying circuit (M1). The chaotic analog circuit has characteristics of simple circuit structure and strong implementability. In addition, switching of chaotic signals can be realized by the memristor circuit and the nonlinear circuit. Meanwhile, chaotic systems capable of generating two types of different charotic attractors and complex chaotic scrolls both show complex dynamic characteristics and become a novel chaotic signal source.

Description

Technical field [0001] The invention relates to a chaotic signal generator capable of switching between a memristive circuit and a non-linear circuit, that is, a chaotic signal source capable of realizing the switching of chaotic signals by switching the memristive circuit and the non-linear circuit. Background technique [0002] Chaos is a complex oscillation between periodic oscillation and noise generated by a certain system described by nonlinear equations. Due to the initial sensitivity and broad spectrum of chaotic signals, its application in the field of secure communication and spread spectrum communication It has aroused widespread attention, and although ordinary signal sources that have been widely used in the field of information engineering can generate periodic signals with different waveforms to facilitate the synchronization of modulation and demodulation, they have requirements that are not conducive to information encryption and other special fields; chaotic sign...

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Problems solved by technology

[0002] Chaos is a complex oscillation between periodic oscillation and noise generated by a deterministic system described by nonlinear equations. Due to the initial value sensitivity and broad spectrum of chaotic signals, it is widely used in the fields of secure communication and spread spectrum communication. It has attracted widespread attention, and although the common signal source that has been widely used in the field of information engineering can generate periodic signals with different waveforms, which is convenient for the synchronization of modulation and demodulation, it is not conducive to the requirements of special fields such as information encryption; chaotic signals It has the characteristics of inherent randomness, initial value sensitivity, broadband, ergodicity, and boundedness, and can generate broadband signals similar to white noise. Therefore, chaotic signals have broad application prospects in the fields of information encryption, secure communication, and chaotic radar.

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