A novel high-frequency interpretation of a general purpose Op-Amp-based negative resistance for chaotic vibrations in a simple a priori nonchaotic circuit. (March 2017)

• Record Type: Journal Article
• Authors: Tchitnga, Robert; Zebaze Nanfa'a, Raoul; Pelap, François Béceau; Louodop, Patrick; Woafo, Paul
• Is Part Of: Journal of vibration and control. Volume 23:Number 5(2017)
• Page Start: 744
• Page End: 751
• Publication Date: 2017-03
• Subjects: Operational amplifiers -- high frequency -- simplest chaotic circuit -- relaxation oscillator -- negative resistance -- hidden chaos; Vibration -- Periodicals; Damping (Mechanics) -- Periodicals; 620.3
• DOI: 10.1177/1077546315585424
• Languages: English
• ISSNs: 1077-5463

Abstract

A novel model of general purpose operational amplifiers is made to approximate, at best, the equivalent circuit for real model at high-frequency. With this new model, it appears that certain oscillators, usually studied under ideal considerations or using many existing real models of operational amplifiers, have hidden subtle and attractive chaotic dynamics that have previously been unknown. These can now be revealed. With the new considerations, a "two-component" circuit, consisting simply of a capacitor in parallel with a nonmodified (and usually presented as a linear, negative) resistance, tends to exhibit chaotic signals. P-Spice and laboratory experimental results are in good agreement with the theoretical predictions.