The search functionality is under construction.

IEICE TRANSACTIONS on Electronics

Pulse Modulation Techniques for Nonlinear Dynamical Systems and a CMOS Chaos Circuit with Arbitrary 1-D Maps

Takashi MORIE, Kenichi MURAKOSHI, Makoto NAGATA, Atsushi IWATA

  • Full Text Views

    0

  • Cite this

Summary :

This paper presents circuit techniques using pulse-width and pulse-phase modulation (PWM/PPM) approaches for VLSI implementation of nonlinear dynamical systems. The proposed circuits implement discrete-time continuous-state dynamics by means of analog processing in a time domain, and also approximately implement continuous-time dynamics. Arbitrary nonlinear transformation functions are generated by the process in which a PPM signal samples a voltage or current source whose waveform in the time domain has the same shape as the desired transformation function. Because a shared arbitrary nonlinear voltage or current waveform generator can be constructed by digital circuits and D/A converters, high flexibility and real-time controllability are achieved. By using one of these new techniques, we have designed and fabricated a CMOS chaos circuit with arbitrary 1-D maps using a 0.6 µm CMOS process, and demonstrate from the experimental results that the new chaos circuit successfully generated various chaos with 7.5-7.8 bit precision by using logistic, tent and chaotic-neuron maps.

Publication
IEICE TRANSACTIONS on Electronics Vol.E87-C No.11 pp.1856-1862
Publication Date
2004/11/01
Publicized
Online ISSN
DOI
Type of Manuscript
Special Section PAPER (Special Section on New System Paradigms for Integrated Electronics)
Category

Authors

Keyword