Digital-analog hybrid chaotic circuit including logic device, and operation method thereof

Abstract

The invention discloses a digital-analog hybrid chaotic circuit including a logic device, and an operation method thereof. The chaotic circuit composed of a difference equation and a sign function is realized in a way that the difference equation is realized by use of an analog circuit and the sign function is realized through a logic gate circuit. An analog circuit portion is composed of such routine analog devices as a resistor, a capacitor, an operational amplifier and the like. A digital circuit portion is composed of a signal formation module, a logic operation module and a unipolar-bipolar signal conversion module, wherein the logic operation module is composed of such routine digital circuits as a NOR gate, a NAND gate and the like. Sign function operation in a chaotic system is realized by use of the digital circuit portion, and chaotic oscillation of an actual circuit is realized through cooperation with the analog circuit. According to the invention, digital devices are embedded in an analog chaotic circuit, sign operation is completed, different chaotic systems can be realized in the same circuit through switching different logic operation circuit modules, and the accuracy, the versatility and the applicability are quite high.

Description

technical field [0001] The invention belongs to a digital-analog hybrid chaotic circuit, in particular to a digital-analog hybrid circuit including logic devices and an operation method thereof. Background technique [0002] Chaotic circuit is an intuitive and effective method to verify the phenomenon of chaos. At present, there are two kinds of chaotic circuit realization methods commonly used: analog realization and digital realization. The analog implementation method requires more analog devices and the device parameters are easily affected by the environment, and the digital implementation method has a limited word length effect. Therefore, the digital-analog hybrid method has attracted more and more attention from researchers. [0003] Nonlinear terms are necessary conditions for the generation of chaos and hyperchaotic phenomena, and usually the nonlinear terms in dynamical systems come from quadratic polynomials. However, piecewise linear functions such as absolut...

AI Technical Summary

Problems solved by technology

The analog implementation method requires more analog devices and the device parameters are easily affected by the environment, and the digital implementation method has a limited word length effect

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