The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The neurons as living cells work as essentially nonlinear oscillators or spike generators. In the case of a particular model the "ideal", the till acceptable i.e. "Healthy", and the impaired ("sick") operation of a neuron can be represented by appropriate parameter settings. A practically interesting control task may be forcing the motion of a "sick" neuron...
We demonstrate that networks of coupled oscillators can approximately solve the Paraxial Helmholtz Equation (PHE), enabling the construction of special-purpose hardware. We argue that solutions of the PHE can be used for efficient non-Boolean computing hardware as well.
Building oscillator based computing systems with emerging nano-device technologies has become a promising solution for unconventional computing tasks like computer vision and pattern recognition. However, simulation and analysis of these systems is both time and compute intensive due to the nonlinearity of new devices and the complex behavior of coupled oscillators. In order to speed up the simulation...
In this paper1 a stability analysis sheds light into aspects of memristor circuit design, revealing a circuit theoretic technique for the stabilization of the NDR portion of the device DC characteristic. This type of studies supports the work of designers exploring memristor potential in electronics. Concepts from nonlinear dynamics theory allow us to gain a deep understanding of the dynamics of our...
Spintronic oscillators are nanodevices that are serious candidates for CMOS integration due to their compactness and easy frequency tunability. Among them vortex-based oscillators appear as one of the most promising technology because of their lower power supply and higher quality factors. To assess their potential in circuits and systems, compact models describing their behavior are necessary. In...
In this study, we investigate synchronization of parametrically excited van der Pol oscillators with small mismatch. In the case of two subcircuits, we confirm that the two subcircuits are synchronized at in-phase state when the adding mismatch is small. By increasing the small mismatch, we observe unsynchronous phenomena. Furthermore, we apply this circuit model to ten coupled oscillators as random...
The application of time-varying root-locus (TVRL) algorithm for transient analysis of electronic circuits with potentially unstable operating points is presented. The TVRL algorithm calculates the dynamic movement of evolving characteristic equation roots by computing them at a sequence of time instants during the circuit transient. This TVRL indicates the existence of potentially unstable operating...
Nonlinear Transmission Lines (NLTLs) have been used with great success in radiofrequency (RF) generation by producing a train of oscillatory waves at the output load. There are two configurations of NLTLs, the first one is a dispersive line consisting of sections with nonlinear components, and the second one is a continuous nondispersive line. The objective of this paper is to study the effects of...
A new four-dimensional chaotic oscillator is proposed in this paper. Circuit behavior model, synchronization with uncertain chaotic parameters and nonlinear dynamic analysis of the chaotic oscillator are presented. Furthermore, an analog circuit of the chaotic oscillator is implemented on a chip for the system-on-chip encrypted communication application. The entire chip area occupies 1.50 mm × 1.23...
A ferroresonace circuit consists of a voltage source, a capacitor and a nonlinear inductor connected in series. The initial flux in transformer core plays an important role on the onset of different types of ferroresonance modes. In this paper, the likelihood of the onset of sustained fundamental mode ferroresonance under the influence of the initial flux is investigated. The flux linkage, the voltages...
Weakly coupled oscillators have shown promise as a computational building block that exploits the power of emerging low power high density nano-devices such as spin torque oscillators and vanadium oxide oscillators. In this paper, we develop a new analytic phase model as well as a circuit simulation to show how clusters and arrays of coupled oscillators can be inserted into three different stages...
Pathophysiologic neural synchronization is a sign of several neurological disorders such as parkinson and epilepsy. In addition, based on established neurophysiologic findings, astrocytes (more type of glial cells) regulate dynamically the synaptic transmission and have key roles in stabilizing neural synchronization. Therefore, in the present study, a new model for digital astrocyte-inspired stimulator...
The Boost converter with digital current-mode control and leading edge modulation is modeled in z-domain first in this paper. The influences of time delay and zero-order holder (ZOH) on digital controlled converters are taken into consideration. Then, the corresponding circuit model is established and simulations are performed to show the effectiveness of the z-model. It's shown by simulations based...
This paper studies the influence of different implementation methods of a simple control algorithm over the chaotic behavior of a specified circuit. Two new methods are presented: one is using a microcontroller and the other is using logical gates. The article also presents a unique approach to modelling a negative resistance as simple as possible, closely resembling a proposed mathematical dependency.
In this study, we investigate synchronization phenomena in coupled polygonal oscillatory networks with strong frustrations. We focus on the amplitude of each oscillator when the coupling strength is increased. By using the computer simulations, we confirm that the amplitude of the oscillators decreases by increasing the coupling strength and oscillation death frustrated oscillators is occurred. Furthermore,...
Voltage controlled microwave oscillators are used in digital communication systems. Pairs of coupled and synchronized voltage controlled oscillators are used to control the phase in microwave antenna arrays as an alternative to other methods. A particular phase shift can be obtained by choosing the free-running frequencies of the oscillators in the array. The aim of this paper is to analyze such a...
Injection-locked oscillators (ILO) have widespread use in wireline and wireless systems as fast-locking clock generators, phase noise filters, and frequency multipliers/ dividers, but their modeling and simulation typically resort to SPICE due to their nonlinear, time-varying characteristics. This paper presents a way to simulate ILOs in an event-driven logic simulator such as SystemVerilog, based...
It is discussed that the changing of parameters in the battery pack model affects the control accuracy and dynamic response of the charging system, through establishing the peak current small signal model of the full-bridge converter and load battery packs' model of the charging system. Moreover, the disadvantages of fixed parameters PID control are put forward. An online identification method is...
Quadrature oscillator based on the operational transresistance amplifier (OTRA) is presented in this paper. The proposed quadrature oscillator circuit uses two OTRAs as main active building blocks and a few external passive components to generate the oscillations. The circuit provides independent control over the condition of oscillation and frequency of oscillation. A prototype circuit is implemented...
This paper presents a kind of biomimetic neural circuit for simulating and implementing sidewinding of a snakelike robot. Biologically inspired by the neural circuit diagram in the spinal cord of lampreys, we propose a neural oscillator model and a chained inhibitory neural circuit. A set of leaky integrator type and sigmoid type interneurons is incorporated into the design of the neural diagram for...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.