Four-wing chaotic signal source circuit and signal amplitude control method thereof

Abstract

The invention discloses a four-wing chaotic signal source circuit and a signal amplitude control method thereof. The four-wing chaotic signal source circuit is characterized that a multiplying circuit composed of four multiplying units, an integration summation circuit composed of eight resistors (one of the resistors is an adjustable resistor or a potentiometer), three capacitors and three operational amplifiers, an inverse-phase amplifying circuit composed of four resistors and two operational amplifiers and a direct-current power supply output four-wing chaotic signals; and the circuit is divided into three branches, the adjustable resistor is used for adjusting feedback strength of product signals of a third dimension circuit, and accordingly, amplitudes of the other two branches of chaotic signals are controlled. According to the signal amplitude control, amplitude changes of variables of a system are sacrificed to exchange for amplitude regulation freedom degrees of another two systems, and accordingly, amplitude-controllable chaotic signals meeting engineering needs are obtained. The circuit is simple, chaotic signal amplitudes can be regulated flexibly to a required range, and the circuit and the control method can be widely applied to chaotic radars, secret communication and fluid mixing.

Description

technical field [0001] The invention relates to the design of a chaotic signal source circuit. A four-wing chaotic attractor is realized by introducing the feedback input of four cross-product items and combining the feedback input of partial linear items and DC control items. The output chaotic signal can realize its amplitude adjustment through adjustable resistance or potentiometer. The invention belongs to the fields of chaotic signal source circuit design, chaotic radar, secure communication and the like. Background technique [0002] As a complex nonlinear phenomenon, chaos has received great attention in the fields of science and engineering applications in the past few decades, and the application of chaotic signals to radar and communication systems has become an extremely active research field. Engineering applications based on chaotic signals often need to amplify and attenuate the amplitude of chaotic signals to a certain extent. If additional hardware is used t...

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Problems solved by technology

Engineering applications based on chaotic signals often need to amplify and attenuate the amplitude of chaotic signals to a certain extent. If additional hardware is used to complete these amplification or attenuation effects, it will require a large cost; the broadband characteristics of chaotic signals make broadband The design of the filter is not easy; the chaotic system is sensitive to the initial value and system parameters. In the process of using chaotic signals, many introduced circuit components or additional systems often introduce signal distortion and deformation

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