IEEE Circuits and Systems Magazine - Q2 2018 - 6

As a leading researcher he was not only shaping the work of many generations
of scientists by his excellent contributions leading to new technologies
but also inspired his students by exceptional lectures.

The first paper by Sung-Mo (Steve) Kang from
UC Santa Cruz is overviewing the teaching and research activities of Prof. Chua at UC Berkeley. The paper clarifies that his brilliance, especially in the guidance of young researchers, attracted many talents to
UC Berkeley who developed into well-recognized scientists in important research fields. Prof. Chua is still
a continuous source of new exciting ideas leading to
important developments.
The paper by Zubaer Ibna Mannan, Changju Yang, and
Hyongsuk Kim from the Chonbuk National University is
addressing different problems where Prof. Chua had an
important impact. A 4-lobe Chua corsage memristor will
be proposed as an extension of the 2-lobe memristor
and analyzed in detail. By connecting an external inductor in series with the 4-lobe memristor and a battery, an
oscillatory circuit is designed and investigated with regard to local activity including the determination of the
edge of chaos regime. It will be shown that the obtained
circuit exhibits a super critical Hopf bifurcation resulting in a stable small-sinusoidal oscillation.
The next paper is by Suhas Kumar and R. Stanley
Williams from Hewlett Packard Labs in Palo Alto. This
paper provides a tutorial on the application of an experimental nonlinear dynamical circuit analysis of a
ferromagnetic inductor. Thereby, the authors derived
a model of a voltage-controlled ideal mem-differential
inductor exhibiting a pinched hysteresis in a plot of the
time derivative of its current versus voltage between its
terminals. The model is classified in this contribution as
an ideal mem (-1,0) element following the famous classifications of Prof. Chua. Furthermore, it will be shown
that the model solutions, which have been verified with
reasonable agreement by measured data, are exhibiting
a negative differential inductance.
Chua's table of fundamental circuit elements will be
addressed as well in the paper by Dalibor Biolek and
Zdenek Biolek from the University of Defence Brno/Brno
University of Technology. A deep discussion of fundamental circuit elements in relation to Chua's table will
be provided including a detailed overview on memristor

Ieee cIrcuIts and systems magazIne

fingerprints. Especially, it will be clarified that a memristor preserves the flux-charge constitutive relation in
all circumstances which can be regarded as a "native"
fingerprint of this element.
The next paper is by Alon Ascoli, Ronald Tetzlaff and
Stephan Menzel from the Technische Universität Dresden and Forschungszentrum Jülich. This paper provides
a deep mathematical analysis of various compact models including those of fabricated memristors. It will be
shown that the recently discovered progressive history
erase with final convergence to a unique steady-state oscillatory behavior, observed for a fabricated non-volatile
TaO memristor when driven by a bipolar periodical signal, can be observed in all other real-world memristor
models as well. This appears to be a ubiquitous effect in
these circuit elements.
The paradigm of Cellular Neural Networks Universal Machine (CNN-UM) proposed by Leon O. Chua and
Tamas Roska is overviewed in the paper by Ákos Zarándy, András Horváth, and Péter Szolgay from the Hungarian Academy of Sciences and Pázmany Péter Catholic
University in Budapest. These powerful re-programmable computing array structures are based on CNN representing locally coupled dynamic systems exhibiting
various nonlinear phenomena outlined in several publications as models in interdisciplinary investigations.
The final paper is by Ángel Rodríguez-Vázquez, J.
Fernández-Berni, J.A. Leñero-Bardallo, I. Vornicu, and R.
Carmona-Galán from the Universidad de Sevilla. This paper is looking on CMOS Vision Sensors (CVISs) especially on those that are based on CNN-UM characterized as
universal high-speed computing systems endowed with
image sensors to be programmed by CNN templates as
instructions. The authors demonstrate that the CNN-UM
paradigm provide a unifying framework to embed computer vision techniques at the sensor focal plane having
the potential to replace conventional imagers.
The guest editors would like to thank the Editor in
Chief for the IEEE Circuits and Systems Magazine Dr.
Chai Wah Wu from the IBM Thomas J. Watson Research
Center and to all contributors of this special issue.

second quarter 2018

Table of Contents for the Digital Edition of IEEE Circuits and Systems Magazine - Q2 2018