IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
1558-1268
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Các bài báo tiêu biểu
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
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
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
A self-tuning fuzzy filtered-U algorithm for the application of active noise cancellation
Tập 49 Số 9 - Trang 1325-1333 - 2002
This paper presents a fuzzy filtered-U algorithm for an active noise control (ANC) system. Instead of complex designing procedures, the proposed approach uses few mathematical transfer functions to design the ANC system. A fuzzy-based self-tuning algorithm is also provided in this paper to adjust the free parameters of the fuzzy filtered-U algorithm. In addition, the proposed method protects ANC s...... hiện toàn bộ
#Noise cancellation #Acoustic noise #IIR filters #Frequency #Adaptive filters #Fuzzy control #Active noise reduction #Signal generators #Fuzzy systems #Control systems
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
Modeling the thermal response of semiconductor devices through equivalent electrical networks
Tập 49 Số 8 - Trang 1187-1197 - 2002
The paper presents a general approach for modeling the effects of thermal response in semiconductor devices as they are seen at the electrical terminals. It is shown that this can be achieved by properly connecting at the electrical ports an equivalent electrical network representing the transformed thermal impedance. The equivalent model is employed to investigate electrothermal interactions in M...... hiện toàn bộ
#Semiconductor devices #Electrothermal effects #MOSFETs #Resistance heating #Resonance #Circuits #Temperature #Thermal resistance #Impedance #Equations
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
An effective algorithm for multiway hypergraph partitioning
Tập 49 Số 8 - Trang 1079-1092 - 2002
In this paper, we propose an effective multiway hypergraph partitioning algorithm. We introduce the concept of net-gain and embed it in the selection of cell moves. Unlike traditional FM-based iterative improvement algorithms in which the selection of the next cell to move is only based on its cell gain, our algorithm selects a cell based on both its cell-gain and the sum of all net-gains for thos...... hiện toàn bộ
#Partitioning algorithms #Iterative algorithms #Databases #Very large scale integration #Circuit synthesis #Decision support systems #Data mining #NP-hard problem #NP-complete problem
On approximate phasor models in dissipative bilinear systems
Tập 49 Số 8 - Trang 1167-1179 - 2002
Dynamic phasors models capture transients in (main) harmonic coefficients of periodically dominated systems, and their utility in state approximations is supported by machine and power systems case studies. The author explores analytical plausibility arguments, and inherent restrictions of such approximations in dissipative systems with quadratically nonlinear lossless components.
#Nonlinear systems #Power system modeling #Power system transients #Power system harmonics #Differential equations #Power system dynamics #Steady-state #Nonlinear equations #Power system analysis computing #Time domain analysis