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The paper summarizes basic rules in the design of simple, low cost sensors based on chaotic dynamics, moreover to analyze the influence of the window comparators on the accuracy and precision of these sensors. We show that the comparator blocks in the circuit for determining the time-in-window parameters can be a significant source of errors that can be easily overlooked. A new version of chaotic...
Several simple circuits with rather complex nonlinearities are presented, essentially based on diodes and varistors. These circuits are believed to extend the family of chaotic circuits based on diodes, as illustrated by the literature. Potential applications to chaotic sensors are briefly discussed.
Nonlinear systems able to develop chaotic dynamics have a tremendous potential in a large class of applications, because of the complexity of the behavior they exhibit and of the sensitivity of their operation to the process parameters. While these properties have been seen as disadvantages, the increased technical capabilities of mastering the operation of these systems and of analyzing their behavior...
The purpose of this paper is to analyze the theoretical feasibility of several classes of iterated maps with specified, desired properties, to help design the feasible ones, and further investigate some of their properties. As the main theoretical result, we establish some feasibility conditions for iterated maps suitable for the implementation on microsystems. The topic intimately relates to exponential...
This paper is the third in a series of papers reporting on the results of protecting the microcontroller executed code against side attacks. The protection consists in randomizing, under the control of a chaotic circuit, of both the clock and the power supply voltage of a microcontroller. The results obtained by this double randomization are compared with the ones obtained with either clock or power...
We demonstrate that visual (geometric) patterns can be robustly recognized by an artificial retina composed of a chaotic sensitive system where the coding of the patterns is by attractor features and an artificial neural network is used to classify the attractors. This opens the door to sensorial systems that mimic the biological ones. The specificity of solutions of chaotic systems to their parameters...
We present a simple sensor based on chaotic dynamics for the determination of water salinity. The sensor is based on the change in dynamics produced in a nonlinear dynamic circuit, which has a circuit element composed of the measured saline solution and electrodes.
The high reactivity of the chaotic systems with respect to circuit parameters makes these systems suitable for high sensitivity sensors for various physical parameters such as light intensity, temperature, or humidity. The purpose of this paper is to improve former results and bring new technological advancement to the sensors based on chaotic systems, specifically to optic sensors.
We propose a method for preventing the power analysis-based reading of instructions executed by a microcontroller. We analyze the operation of a microcontroller system that uses a clock based on a chaotic generator. The purpose of the analysis is twofold: to determine the possibility of clocking a typical microcontroller, like PIC16F84, with a chaotic clock, and to determine the efficiency of securing...
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