A CDTA-based quadrature oscillator circuit is proposed. The employs two current-mode allpass sections in a loop, and provides high-frequency sinusoidal oscillations at high impedance output terminals of the CDTAs. has no floating capacitors, which advantageous from integrated manufacturing point view. Moreover, oscillation frequency this configuration can be made adjustable by using voltage controlled elements (MOSFETs), since resistors are either grounded or virtually grounded.

A methodology of SPICE modeling general memristive, memcapacitative, and meminductive systems is proposed their special cases such as memristors (MR), memcapacitors (MC), meminductors (ML) are given. These elements included alongside the conventional R, C, L in a constellation, which generalizes hitherto approach when memristor regarded fourth missing passive element. It shown that memristor, designed HP laboratories, can be modeled first-order memristive system with nonlinear dependence...

Recently, novel findings have been published, according to which some mem-systems excited by harmonic signals can be characterised the so-called 'non-crossing-type pinched hysteretic loops'. Presented is a proof that this phenomenon cannot occur in ideal memristors, memcapacitors and meminductors are defined axiomatically via corresponding constitutive relations or other equivalent characteristics, 'crossing-type loop' thus one of their typical fingerprints.

Memory circuit elements, namely memristive, memcapacitive and meminductive systems, are gaining considerable attention due to their ubiquity use in diverse areas of science technology. Their modeling within the most widely used environment, SPICE, is thus critical make substantial progress design analysis complex circuits. Here, we present a collection models different memory elements provide methodology for accurate reliable SPICE environment. We also codes these written popular versions...

A recently published circuit that operates as a memcapacitor (MC), utilising memristor (MR) emulator, is analysed with confirmation it simulates MC only approximately. MR to mutator designed by means of off-the-shelf circuits. The SPICE analysis confirms this transforms exactly the constitutive relation into MC.

Abstract The paper presents a working electrical scheme modeling the memristor. allows experimenting with model under various testing signals. user can use it to verify theoretical presumptions about memristor properties. Examples of several typical measurements are shown. Copyright © 2010 John Wiley & Sons, Ltd.

A methodology for SPICE modelling of a memcapacitor is described. The model compounded the submodel state-space system, representing memory effect device, which depends on concrete physical implementation and capacitor, capacitance controlled by system state. basic fingerprints are demonstrated in example charge-controlled memcapacitor.

One of the main issues preventing a large-scale exploration full potential memristors in electrical circuits lies convergence and numerical errors encountered computer-aided integration differential algebraic equation set governing peculiar dynamical behavior these nonlinear two-terminal components. In most cases complexity this prevents an analytical derivation closed-form state solutions. Therefore investigation dynamics based upon them relies on software-based mathematical equations....

It is well known that the memristor driven by a periodical voltage or current exhibits pinched <formula formulatype="inline" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink"><tex Notation="TeX">$v {-} i$</tex></formula> hysteresis loop. A novel finding published in this brief, namely, area within loop directly related to value of action potential, which was introduced Leon Chua his original work from 1971.

PSPICE models of current- and flux-controlled meminductor are described. The consist two parts, one which represents the state-space description memory effect device, other part is an inductor whose inductance depends on system state. basic fingerprints meminductor, i.e. flux–current pinched hysteresis loops, unambiguous constitutive relation between time integral flux electric charge, identical zero-crossing points current waveforms demonstrated example current-controlled meminductor.

This paper presents a first of its kind canonic realization active RC (ARC) sinusoidal oscillator with non-interactive/independent tuning laws, which simultaneously provides buffered quadrature voltage outputs and explicit current outputs. The proposed circuit is created using new building block, namely the Z-copy controlled-gain differencing amplifier (ZC-CG-CDBA). uses three resistors two grounded capacitors, independent/non-interactive control condition oscillation (CO) frequency (FO) by...

It is shown that the area of pinched hysteresis loop current‐controlled ideal memristor represents quantity ‘content’, which was introduced into theory nonlinear systems by Millar in 1951. Two parts content are identified correspond to distinct below v–i characteristic memristor: one related power conditions and other instantaneous state memory. demonstrated for a driven sinusoidal current part depends on fundamental harmonic voltage, whereas memory given only higher harmonics even case...

Since there are many possible types of nonlinear charge-flux constitutive relations ideal memristors, such elements can manifest various behavior, and the identification typical memristor fingerprints from measured data or simulator outputs be difficult in some cases. The aim this paper is to reveal several which extend repertoire hitherto published currently well-known fingerprints. These results useful for a clear fast system behavior that violates principles operation memristors.

This study proposes a current mode canonical single resistance-controlled oscillator (SRCO) circuit based on modified differencing transconductance amplifier. The employs grounded capacitors and provides output with high impedance. proposed also enables orthogonal control of frequency oscillation condition. performance the SRCO is verified by means simulation program integrated emphasis (SPICE) simulations, on-chip experiments measurements.

The paper refers to problems of modeling and computer simulation generic memristors caused by the so-called window functions, namely stick effect, nonconvergence, finding fundamentally incorrect solutions.A profoundly different approach is proposed, which mathematically equivalent windowbased modeling.However, due its numerical stability, it definitely smoothes above away.

In order to avoid non-convergence and other numerical problems associated with the simulation of extremely large memristive networks, suitable models individual memristors need be developed. A circuit containing thousands for finding shortest path in a complicated maze is typical example numerically challenging simulation. benchmark testing applications various complexities used transient analysis. It shown that commonly models, from simple behavioral Pickett require special modifications...