Frequency limitations in generating multi-scroll chaotic attractors using CFOAs

JM Munoz-Pacheco, E Tlelo-Cuautle… - … Journal of Electronics, 2014 - Taylor & Francis
JM Munoz-Pacheco, E Tlelo-Cuautle, I Toxqui-Toxqui, C Sanchez-Lopez, R Trejo-Guerra
International Journal of Electronics, 2014Taylor & Francis
The current-feedback operational amplifier (CFOA) allows us to implement any kind of circuit
useful in analogue signal processing applications. However, it has limited performance in
implementing nonlinear circuits. That way, this investigation highlights the experimental
results of implementing a multi-scroll chaotic oscillator by using the commercially available
CFOA AD844. The chaotic oscillator is based on saturated nonlinear function (SNLF) series,
and we show and discuss its frequency limitations to generate 3-to 10-scrolls from 1 kHz to …
The current-feedback operational amplifier (CFOA) allows us to implement any kind of circuit useful in analogue signal processing applications. However, it has limited performance in implementing nonlinear circuits. That way, this investigation highlights the experimental results of implementing a multi-scroll chaotic oscillator by using the commercially available CFOA AD844. The chaotic oscillator is based on saturated nonlinear function (SNLF) series, and we show and discuss its frequency limitations to generate 3- to 10-scrolls from 1 kHz to 100 kHz. Finally, we conclude that the frequency limitations are due to the nonideal characteristics of the CFOA-based SNLF block, imposed by the AD844.
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