Binary Memory Implemented by Using Variable Gain Amplifiers With Multipliers
Jiri Petrzela, Roman Sotner
This work describes design process toward fully analogue binary memory where two coupled piecewise-linear (PWL) resistors are implemented using novel network topology with the voltage gain amplifiers (VGA). These versatile active devices allow slopes of individual segments of ampere-voltage (AV) characteristics associated with PWL two-terminals to be electronically adjustable via the external DC voltage. Numerical analysis of designed binary memory cell covers all mandatory parts: phase
... s, calculation of the largest Lyapunov exponent (LLE), basins of attraction for the typical strange attractors, and high-resolution circuit-oriented bifurcation sequences. A transition from the stable states toward chaotic regime through metastability is proved via real measurement. The robustness of the generated chaotic attractors is verified by captured oscilloscope screenshots. INDEX TERMS Analogue binary memory, bifurcation diagram, electronic tuning, chaos, Lyapunov exponent, piecewise-linear (PWL) resistors, strange attractor. 197276 This work is licensed under a Creative Commons Attribution 4.0 License. For more information, see https://creativecommons.org/licenses/by/4.0/ VOLUME 8, 2020 JIRI PETRZELA was born in Brno, Czech Republic, in 1978. He received the M.Sc. and Ph.D. degrees in theoretical electronics, in 2003 and 2007, respectively. He is currently an Associate Professor with the Department of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Czech Republic. His research interests include numerical methods in electrical engineering, nonlinear dynamics, chaos theory, analog lumped circuit design, and computer-aided analysis. ROMAN SOTNER (Member, IEEE) was born in Znojmo, Czech Republic, in 1983. He received the M.Sc. and Ph.D. degrees from the Brno University of Technology, Czech Republic, in 2008 and 2012, respectively. He is currently an Associate Professor with the Department of Radio Electronics, Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic. His research interests include circuits in current mode, circuits with direct electronic controlling possibilities especially, computer simulation, and analog circuits, such as active filters, oscillators, audio, and so on.