IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
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Global stability of a class of discrete-time recurrent neural networks
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1104-1117 - 2002
This paper presents several analytical results on global asymptotic stability (GAS) and global exponential stability (GES) for the equilibrium states of a general class of discrete-time recurrent neural networks (DTRNNS) with asymmetric connection weight matrices and globally Lipschitz continuous and monotone nondecreasing activation functions. A necessary and sufficient condition is formulated to......
#Recurrent neural networks #Neural networks #Asymptotic stability #Lyapunov method #Symmetric matrices #Stability analysis #Sufficient conditions #Signal processing #Stability criteria #Design optimization
A PWL circuit approach to the definition of a /spl epsiv/-approximation model of scalar static hysteresis
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1290-1308 - 2002
A piecewise-linear (PWL) circuit model of hysteresis phenomena is presented. The proposed model involves the use of parallel-connected simple PWL circuits. The PWL characteristic of the model allows a direct determination of the condition on a rate-independent hysteresis behavior. The basic features of the model are discussed through proper demonstrations. In particular, it is shown that the param......
#Hysteresis #Biological system modeling #Piecewise linear techniques #Nonlinear circuits #Mathematical model #Robustness #Arithmetic #Ferroelectric materials #Biological systems
The effects of generation redispatch on Hopf bifurcations in electric power systems
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1180-1186 - 2002
In this paper, we examine how varying the generation redispatch can improve the system stability margins with respect to Hopf bifurcations, as well as robustness to uncertainties in load modeling and distribution. It is seen that an optimal selection of load following units plays a key role in accomplishing these objectives. An optimal redispatch strategy is proposed, and is verified through a var......
#Power generation #Bifurcation #Power system modeling #Voltage #Load modeling #Eigenvalues and eigenfunctions #Robust stability #Power system stability #Differential equations #Power system dynamics
A loop-breaking method for the analysis and simulation of feedback amplifiers
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1045-1061 - 2002
Two-circuit models for feedback subcircuits are developed from a modification to the two-port method of feedback amplifier analysis and are applied in a method to break the feedback loop. These models are terminally equivalent to linear and nonlinear subcircuits, have physically-disconnected topologies, and employ dependent sources to control lateral signal transfer with a switch-like on or off ma......
#Analytical models #Feedback amplifiers #Feedback loop #Operational amplifiers #SPICE #Integrated circuit interconnections #Circuit simulation #Voltage #Circuit topology #Equivalent circuits
An improved global stability result for delayed cellular neural networks
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1211-1214 - 2002
This paper presents a sufficient condition for the uniqueness and global asymptotic stability of the equilibrium point for delayed cellular neural networks. This result improves and generalizes some of the previous stability results derived in the literature.
#Cellular neural networks #Asymptotic stability #Stability analysis #Sufficient conditions #Mathematical model #Circuits #Equations
Analysis and minimization of L/sub 2/-sensitivity for linear systems and two-dimensional state-space filters using general controllability and observability Gramians
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1279-1289 - 2002
A novel expression for the evaluation of L/sub 2/-sensitivity is developed for the cases of linear discrete-time systems, linear continuous-time systems, and two-dimensional (2-D) state-space digital filters. This is accomplished by introducing the concept of general controllability and observability Gramians in each case. Moreover, the L/sub 2/-sensitivity measures obtained here contain the conve......
#Linear systems #Digital filters #Observability #Minimization #Controllability #Symmetric matrices #Transfer functions #Nonlinear filters #Two dimensional displays #Coordinate measuring machines
Optimal digital redesign of hybrid cascaded input-delay systems under state and control constraints
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1382-1392 - 2002
This paper presents a new multi-objective evolutionary programming (MOEP)-based digital redesign scheme to find an optimal low-gain digital tracking controller for hybrid control of multi-input, multi-output (MIMO) cascaded analog systems with input time delays, having the constraints on the states and inputs. The proposed global optimization searching technique enables one to find a high-gain opt......
#Optimal control #Control systems #Digital control #MIMO #Delay effects #Pulse modulation #Genetic programming #Constraint optimization #Sampling methods #Amplitude modulation
Design and simulation of a single-electron random-access memory array
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1370-1375 - 2002
A single-electron random-access memory array is designed and its operation is analyzed using Monte Carlo simulation. This memory array utilizes a basic single-electron memory cell that has been recently fabricated. Bits of information are represented by the presence or absence of a single or a small number of electrons at conducting islands. Simulation shows that selective read and write operation......
#Single electron memory #Circuit simulation #Electron traps #Computational modeling #Computer simulation #Application software #CMOS technology #Read-write memory #Power dissipation #Inverters
Lyapunov-theory-based radial basis function networks for adaptive filtering
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 8 - Trang 1215-1220 - 2002
Two important convergence properties of Lyapunov-theory-based adaptive filtering (LAF) adaptive filters are first explored. The LAF finite impulse response and infinite impulse response adaptive filters are then realized using the radial basis function (RBF) neural networks (NNs). The proposed adaptive RBF neural filtering system possesses the distinctive properties of RBF NN and the LAF filtering......
#Radial basis function networks #Adaptive filters #IIR filters #Neural networks #Finite impulse response filter #Filtering #Lyapunov method #Convergence #Stochastic processes #Stability
Noise analysis of phase-locked loops
IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications - Tập 49 Số 9 - Trang 1309-1316 - 2002
This work addresses the problem of noise analysis of phase-locked loops (PLLs). The problem is formulated as a stochastic differential equation and is solved in the presence of circuit white noise sources yielding the spectrum of the PLL output. Specifically, the effect of loop filter characteristics, phase-frequency detector, and phase noise of the open-loop voltage-controlled oscillator (VCO) on......
#Phase noise #Phase locked loops #Voltage-controlled oscillators #Filters #Phase detection #Shape measurement #Circuit noise #Phase frequency detector #Phase measurement #Stochastic resonance
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