IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications
1558-1268
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Các bài báo tiêu biểu
A minimal integral nonlinearity criterion to optimize the design of a new tanh/sinh-type bipolar transconductor
Tập 49 Số 8 - Trang 1062-1070 - 2002
We report on the use of a simple design optimization criterion for obtaining maximum static transfer function linearity. It is based on an analytic function that corresponds to the integral nonlinearity of the circuit. The criterion may be useful, either as an analytic tool to gain insight into the circuit's behavior, or as an efficient computational alternative to calculating total harmonic disto......
#Design optimization #Transconductors #Linearity #Transfer functions #Harmonic analysis #Circuit analysis computing #Total harmonic distortion #Circuit simulation #Transconductance #Voltage
A modified Volterra series approach for nonlinear dynamic systems modeling
Tập 49 Số 8 - Trang 1118-1128 - 2002
This paper describes a modeling approach for nonlinear dynamic systems based on a modified Volterra series; by comparing the truncation error of this series with that of the classical Volterra one, we outlined that, under the assumption of short-term nonlinear memory effects, the modified series enables a single-fold nonlinear convolution integral to be adopted also in the presence of strong nonli......
#Modeling #Nonlinear systems #Nonlinear dynamical systems #Finite wordlength effects #Convolution #Bandwidth #Microscopy #Signal processing #Transfer functions #Voltmeters
A loop-breaking method for the analysis and simulation of feedback amplifiers
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
A new approach for the simulation of power electronic circuits
Tập 49 Số 9 - Trang 1317-1324 - 2002
A new technique for simulating power electronic circuits consists of connecting voltage sources in parallel with nonlinear elements such as switches and diodes. Alternatively, current sources may be connected in series with the nonlinear elements. The mismatch currents through the voltage sources (or the mismatch voltages across the current sources) are calculated. The objective of the proposed te......
#Circuit simulation #Voltage #Power electronics #Steady-state #Circuit topology #Transient response #Electronic circuits #Switches #EMTP #Nonlinear equations
Analysis and minimization of L/sub 2/-sensitivity for linear systems and two-dimensional state-space filters using general controllability and observability Gramians
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
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
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......
#Operational amplifiers #Rail to rail amplifiers #Signal to noise ratio #Impedance #Circuits #Parasitic capacitance #Feedback #Power supplies #Power amplifiers #Voltage
An improved global stability result for delayed cellular neural networks
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
Robust mixed H/sub 2//H/sub /spl infin// filtering with regional pole assignment for uncertain discrete-time systems
Tập 49 Số 8 - Trang 1236-1241 - 2002
This paper deals with the robust mixed H/sub 2//H/sub /spl infin// filtering problem with regional pole assignment for linear uncertain discrete-time systems in the presence of two sets of exogenous disturbance inputs. A general framework for solving this problem is established using a linear matrix inequality (LMI) approach in conjunction with regional pole constraints, and H/sub 2/ and H/sub /sp......
#Filtering #Oscillators #Band pass filters #Linear matrix inequalities #Noise robustness #Estimation error #Power supplies #Resistors #Circuit optimization #Tuning
Noise analysis of phase-locked loops
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