IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
1558-1268
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Các bài báo tiêu biểu
Design and simulation of a single-electron random-access memory array
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...... hiện toàn bộ
#Single electron memory #Circuit simulation #Electron traps #Computational modeling #Computer simulation #Application software #CMOS technology #Read-write memory #Power dissipation #Inverters
Stability analysis of shift-invariant multidimensional systems
Tập 49 Số 8 - Trang 1093-1103 - 2002
In a state-space model of a class of linear discrete-time shift-invariant multivariable multidimensional dynamical systems, the problem of internal stability of a system is studied from various aspects. A sequence of equivalent statements is presented to characterize the necessary and sufficient conditions for the internal stability of a multidimensional dynamics. These statements are generalized ...... hiện toàn bộ
#Stability analysis #Multidimensional systems #Space technology #Hilbert space #Asymptotic stability #Sufficient conditions #Lyapunov method #Two dimensional displays #Signal generators #Mediation
Robust absolute stability of time-varying nonlinear discrete-time systems
Tập 49 Số 8 - Trang 1129-1137 - 2002
This paper studies the problem of robust absolute stability of a class of nonlinear discrete-time systems with time-varying matrix uncertainties of polyhedral type and multiple time-varying sector nonlinearities. By using the variational method and the Lyapunov second method, criteria for robust absolute stability are obtained in different forms for the class of systems under consideration. Specif...... hiện toàn bộ
#Robust stability #Time varying systems #Stability criteria #Sufficient conditions #Lyapunov method #Uncertainty #Piecewise linear techniques #Equations #Nonlinear control systems #Asymptotic stability
Unified analysis of synchronous commutations in switching converters
Tập 49 Số 8 - Trang 1150-1166 - 2002
The analysis of synchronous commutations in switching converters is discussed in this paper. The Compensation Theorem (CT) is applied in order to define two matrices, called respectively zero-order and first-order master-slave connection matrix (Z-MSCM, F-MSCM), which allow a unified analysis of both hard and soft synchronous commutations in switching converters. The Z-MSCM and F-MSCM provide the ...... hiện toàn bộ
#Switching converters #Switches #Diodes #Buck converters #Matrix converters #Zero voltage switching #Master-slave #Feedback circuits #Numerical simulation #Clocks
A high-input-impedance buffer
Tập 49 Số 8 - Trang 1209-1211 - 2002
The input impedance of high-input-impedance buffers with a bootstrapped biasing circuit and supply rails may attain values much larger then it would correspond to the open-loop gain of the operational amplifier used. Similarly, the efficiency of suppression of capacitance connected to the inputs is unexpectedly high, although not that of the opamp input capacitance itself. Good agreement of experi...... hiện toàn bộ
#Operational amplifiers #Rail to rail amplifiers #Signal to noise ratio #Impedance #Circuits #Parasitic capacitance #Feedback #Power supplies #Power amplifiers #Voltage
Global stability of a class of continuous-time recurrent neural networks
Tập 49 Số 9 - Trang 1334-1347 - 2002
This paper investigates global asymptotic stability (GAS) and global exponential stability (GES) of a class of continuous-time recurrent neural networks. First, we introduce a necessary and sufficient condition for the existence and uniqueness of equilibrium of the neural networks with Lipschitz continuous activation functions. Next, we present two sufficient conditions to ascertain the GAS of the...... hiện toàn bộ
#Recurrent neural networks #Asymptotic stability #Neural networks #Sufficient conditions #Convergence #Vectors #Quadratic programming #Constraint optimization #Councils #Automation
The effects of generation redispatch on Hopf bifurcations in electric power systems
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...... hiện toàn bộ
#Power generation #Bifurcation #Power system modeling #Voltage #Load modeling #Eigenvalues and eigenfunctions #Robust stability #Power system stability #Differential equations #Power system dynamics
Synthesis of robust strictly positive real discrete-time systems with l/sub 2/ parametric perturbations
Tập 49 Số 8 - Trang 1221-1225 - 2002
The author addresses the robust strict-positive realness problem for families of discrete-time polynomials where the uncertainty is described via a l/sub 2/ ball in coefficient space. It is shown constructively that under the only assumption that all the polynomials of the family are Schur, the sought filter can be provided in closed form as a polynomial or rational function with an a-priori bound...... hiện toàn bộ
#Robustness #Polynomials #Filters #Uncertainty #Sufficient conditions #Transfer functions #Robust control #Adaptive control #Uncertain systems #Convergence
Controllability and observability of linear time-varying impulsive systems
Tập 49 Số 8 - Trang 1198-1208 - 2002
Many practical systems in physics, chemistry, biology, engineering, and information science have impulsive dynamical behaviors due to abrupt changes at certain instants during the dynamical processes. These complex dynamical behaviors can be modeled by impulsive differential systems. This paper studies the controllability and observability issues for a general time-varying impulsive control system...... hiện toàn bộ
#Controllability #Observability #Time varying systems #Control systems #Biological system modeling #Systems biology #Information science #Aerospace electronics #Differential equations #Control engineering education
Lyapunov-theory-based radial basis function networks for adaptive filtering
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...... hiện toàn bộ
#Radial basis function networks #Adaptive filters #IIR filters #Neural networks #Finite impulse response filter #Filtering #Lyapunov method #Convergence #Stochastic processes #Stability