Summary
the 2014 International Symposium on Nonlinear Theory and its Applications
2014
Session Number:C2L-A
Session:
Number:C2L-A4
A simple Two-Transistor Chaos Generator Based On A Resistor-Capacitor Phase Shift Oscillator
Lars Keuninckx, Guy Van der Sande, Jan Danckaert,
pp.490-493
Publication Date:2014/9/14
Online ISSN:2188-5079
DOI:10.34385/proc.46.C2L-A4
PDF download (363.5KB)
Summary:
We added a small subcircuit to an otherwise standard one-transistor self-biasing resistor-capacitor (RC) phase-shift oscillator to induce chaotic oscillations in four dimensions. The final circuit that we have designed uses only two transistors, no inductors, and is powered by a single supply voltage. As such it is an attractive and low-cost source of chaotic oscillations for many applications. We show that the qualitative behaviour of the circuit is captured using a simplified piecewise linear transistor model. Our analysis of this model shows the chaos to stem from hysteretic jumps between unstable equilibria around which growing oscillations exist.