Abstract
Free control of a chaotic signal means that its various aspects such as amplitude, frequency and offset can be freely controlled, which is of great value for the application of chaotic circuits. However, such a chaotic circuit typically contains many quadratic terms requiring multiplier-oriented operations, which posts a great challenge to the design of chaotic oscillators. In this work, a chaotic oscillator with easy free control containing five quadratic terms was designed and implemented. By making full use of the current output characteristic of multiplier AD633 and op-amp AD844, a compact chaotic circuit with three multipliers and only one op-amp was constructed. Experimental result shows its flexibility for free control.
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