The Experimentation On Chaotic Circuit Of Wien Bridge

The Wien bridge oscillator is used widely as a sine wave oscillator,and can apply for test of analog signal.The chaotic circuit is a direction of circuitry all the time.In recent years,Memristive chaotic circuit has caused scholars to take care with the rise of the fourth basic circuit element.The design of chaotic circuit based on the characteristics of Wien bridge turns into a direction of chaotic circuit's designation.At present,most of the researches on the chaotic circuit are limited to numerical calculation and circuit simulation.The chaotic systems of Wien bridge are designed in the paper,and chaotic circuits are designed with theoretical analysis and numerical calculation.The experimental results are in agreement with the results of theoretical analysis and numerical calculation.The works done in the paper are as follows:1.Based on characteristics of the Wien bridge circuit that can produce sine signal,two kinds of chaotic systems in the mode of oscillation are designed by combining with the nonlinear circuit.Dynamic characteristics of these two systems are theoretically analyzed and chaotic circuits are realized.The correctness of the chaotic systems is proved by theoretical analysis and experimental results.2.According to the characteristics of LC oscillation circuit,two kinds of chaotic system are designed by means of memristor or nonlinear circuit.The dynamic behaviors of the circuit are investigated by conventional dynamical analysis methods.The chaotic circuits of Wien bridge were realized.3.Chaotic signal of Wien bridge is generated without any nonlinear circuits.The Wien bridge can generate a chaotic signal by itself.The chaotic circuit is designed by the method that the operational amplifier is in nonlinear region.4.The circuit of Wien bridge is changed into a bandpass filter.According to the characteristics of bandpass filter,the control of chaotic circuit is implemented.Several unstable periodic orbits are get.The results of theoretical analysis and circuit experiment verify the correctness.In this paper,the theoretical analysis,numerical calculation and circuit experiment are combined effectively.The chaotic systems are designed and the applied range of Wien bridge is expanded.It is significant to understand the circuit of Wien bridge in theory and practice.