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The multitone signals make traditional analysis difficult even impossible if the circuits are highly nonlinear. Using multiple time variables allow an efficient representation of these signals. In this formulation the components with different rates of variation are decoupled, each disparate signal being represented by its own artificial time scale. The differential algebraic equations describing...
On the basis of the modified nodal analysis, universal matrices-stamps are defined for modeling several types of current conveyor. From these stamps, the so-called Dragonfly Mason-Coates' graphs are derived for a fast hand-and-paper symbolic analysis of current-conveyor circuits.
The paper deals with the implementation of multi-domain symbolic analysis in a new program, SAMD (Symbolic Analysis of Mechatronic Drives), developed with the emphasis on linearized hybrid systems combining classical electrical circuits, controllers, electro-mechanical converters and mechanical parts of electric drives. The systems analyzed can be composed of both basic elements and more complex blocks...
New analytical equations are proposed for oscillation amplitude of the MOS Colpitts oscillator. These equations are obtained from a large signal analysis. The analysis is based on a reasonable estimation for the output waveform. The estimated waveform should satisfy the nonlinear differential equations governing the circuit. The validity of the resulted equations is verified through simulations using...
Mathematical equations are possible to simulate with various electronic circuits. Inductors and capacitors intrinsically are capable of integrating and differentiating, and active components alone can realize such algebraic operations as addition and multiplication. In this work, linear differential equations are shown to be implemented with three active components, namely operational amplifiers(Opamp),...
According to chaotic characteristics, a method for studying on chaos by using Poincare sections is proposed. The method can study on sensitivity to parameters and initial conditions for chaotic system. A lot of experiments based on Chua's chaotic circuit have been done. The simulation results demonstrate the effectiveness of this method.
Multiresolution or wavelet analysis is widely used in advanced data compression algorithms, and some approaches applied this technique in describing electromagnetic fields. The main goal of the application of MRA is its flexibility, i.e., since the details of the electromagnetic field are not distributed equally over different parts of the system, thus locally different resolution level can be applied...
A new electronically tunable current-mode high-Q bandpass filter employing second-generation current controlled conveyor (CCCII)-based first-order all-pass filters is presented. The proposed filter uses only three CCCIIs, one current-controlled resistor and two grounded capacitors. The center frequency (??c) and the quality factor (Q) can be independently adjusted through the bias current of the CCCII...
This paper describes a digital proportional-integral-derivative (PID) controller technique applied to the DC-DC buck converter. The converter is modelled using a state space averaging technique. Due to the non-linear of the power converter, the PID controller is designed to simplify the compensation of the DC-DC converter. The control algorithm is implemented in digital signal processor (DSP) TMS320F2812...
This paper addresses the capacitance estimation for an immunosensor chip (ISC). It is known that the capacitance of an antibody, or other ligand such as an scFv molecule, changes when it binds with an antigen. If the sensor plane of the ISC is coated with an array of a specific receptor or ligand that binds to the protein on the virus, then the diseased cells can be detected, captured, and dealt with...
There are several reasons for circuit modeling of quantum systems: the first is to establish a bridge between quantum and classical worlds, inasmuch this is possible, the second is to provide a unified view of quantum systems interacting with a macroscopic environment on the point of view of observations done on the latter, the third is the possibility of using circuit simulators to describe the performance...
The operation of wireless sensor networks is fundamentally constrained by available energy sources. In this paper, we propose a numerical power estimation technique for register transfer level. This technique allows estimating the power dissipation of components in WSN to their statistical knowledge of primary inputs/outputs. During power estimation procedure, the sequence of an input stream is generated...
In present work we aimed to develop a NN based approach to translate the design parameter from a submicron technology to a long channel one. The proposed approach is able to find the superseded design parameters in 1.2 mum technology using the input information, which are design parameters of Gain, Phase Margin, Unity Gain Bandwidth and Power in TCMS 0.18 mum. The training data are obtained by various...
A Triangular and trapezoidal transconductor circuits with a Programmable slope (keeping constant height or constant width and making the other variable) and also horizontal position are presented. Triangular and trapezoidal function generators have many applications like high speed folding analog-to-digital convertors, a piecewise-linear approximation and also used in fuzzy controller. PSPICE simulation...
Multi-core processor architectures are gaining huge interests from academia and industry. The multi-core architectures have been proposed and designed for overcoming diminishing return and for efficiently utilizing the exponentially increasing number of transistors available in nano-meter semiconductor technology. Though the multi-core architecture has been proposed as a promising alternative to a...
The MATLAB simulation model of transformer considering the influences of saturation is introduced. The circuit equation and magnetic circuit equation of transformer are established. The encapsulating method of simulation model is given in the MATLAB, which can calculate dynamic and static process of any load and analyze the influence of the various transformers magnetic circuit saturation. Finally,...
The new converter transformer, that is the auto-compensation and harmonic-shielding converter transformer, adopts the self-coupling wiring for the secondary windings, and there is a tap at the linking point of the coupling windings, which is connected with the inductive filters. Compared with the traditional converter transformer, the electromagnetic transient state of the new converter transformer...
Double-winding AC-DC generators are used in self-contained electrical systems. A 3-phase winding and a 12 phase winding set are installed on the stator of the machine, the former delivering AC power and the latter supplying DC power through a bridge rectifier. In this paper, mathematical models are set up in d-q coordinates and the corresponding electromagnetic parameters are proposed for studying...
In this paper, FE based circuit model is incorporated into systematic state space model to investigate the transformer inner behavior and characteristics of a saturated transformer type solid state fault current limiter (SSFCL). With novel design strategy for the proposed transformer, the FCL has small volume, low cost, and limits the short-circuit current substantially.
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