Systematic realisation of inductorless and resistorless Chua's chaotic oscillator using VDGA.

This paper presents an implementation of inductorless and resistorless Chua's chaotic oscillator using voltage-differencing gain amplifier (VDGA). The chaotic oscillator circuit is implemented by designing a resistorless Chua's diode using a single VDGA and a VDGA-based tank oscillator with coupled network circuit. The proposed chaotic oscillator uses two VDGAs and three grounded capacitors only. Although resistors and inductors may also be fabricated, the use of no resistor and inductor makes the circuit suitable for fabrication in terms of cost and area. It offers the advantages of an increased frequency spectrum having a dominant operating frequency of 21.1 MHz. The Chua's circuit is simulated in Pspice using both macro models of IC MAX435 and 0.18 µm CMOS TSMC Technology parameters. As a result, chaotic waveforms (V₁ and V₂) and the various attractors (V₁ versus V₂) are found in the simulation. These results confirm the theoretical predictions of Chua's chaotic oscillator. Various aspects of the proposed implementation of Chua's oscillator are compared with the earlier implementations. Finally, the paper concludes with simple remarks on the proposed circuit. [ABSTRACT FROM AUTHOR]