72 research outputs found
Emulation of floating memcapacitors and meminductors using current conveyors
We suggest circuit realizations of emulators transforming memristive devices
into effective floating memcapacitive and meminductive systems. The emulator's
circuits are based on second generation current conveyors and involve either
four single-output or two dual-output current conveyors. The equations
governing the resulting memcapactive and meminductive systems are presented.Comment: Electronics Letters (in press
Fourier Response of a Memristor: Generation of High Harmonics with Increasing Weights
We investigate the Fourier transform of the current through a memristor when
the applied-voltage frequency is smaller than the characteristic memristor
frequency, and the memristor shows hysteresis in the current-voltage plane. We
find that when the hysteresis curve is "smooth", the current Fourier transform
has weights at odd and even harmonics that decay rapidly and monotonically with
the order of the harmonic; when the hysteresis curve is "sharp", the Fourier
transform of the current is significantly broader, with non-monotonic weights
at high harmonics. We present a simple model which shows that this qualitative
change in the Fourier spectrum is solely driven by the saturation of
memristance during a voltage cycle, and not independently by various system
parameters such as applied or memristor frequencies, and the non-linear dopant
drift.Comment: 5 pages, 3 figure
A Compact CMOS Memristor Emulator Circuit and its Applications
Conceptual memristors have recently gathered wider interest due to their
diverse application in non-von Neumann computing, machine learning,
neuromorphic computing, and chaotic circuits. We introduce a compact CMOS
circuit that emulates idealized memristor characteristics and can bridge the
gap between concepts to chip-scale realization by transcending device
challenges. The CMOS memristor circuit embodies a two-terminal variable
resistor whose resistance is controlled by the voltage applied across its
terminals. The memristor 'state' is held in a capacitor that controls the
resistor value. This work presents the design and simulation of the memristor
emulation circuit, and applies it to a memcomputing application of maze solving
using analog parallelism. Furthermore, the memristor emulator circuit can be
designed and fabricated using standard commercial CMOS technologies and opens
doors to interesting applications in neuromorphic and machine learning
circuits.Comment: Submitted to International Symposium of Circuits and Systems (ISCAS)
201
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