The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform

A. Opal - One of the best experts on this subject based on the ideXlab platform.

  • Time domain sensitivity of Linear Circuits using sampled data simulation
    IEEE Transactions on Circuits and Systems I-regular Papers, 2000
    Co-Authors: Bijan Raahemi, A. Opal
    Abstract:

    This paper presents a new method for computation of time-domain sensitivity of Linear networks. It is based on sampled data simulation (SDSIM) of Linear Circuits presented by Opal (1996). The method is accurate because no approximation is made, and efficient because some parts of the computations are performed only once, in a preprocessing step before simulation starts. Both sensitivity network and adjoint network approaches are discussed.

  • The transition matrix for Linear Circuits
    IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, 1997
    Co-Authors: A. Opal
    Abstract:

    The state transition matrix /spl Phi/(t)=e/sup At/ plays an important role in the state variable analysis of Linear time-invariant Circuits. In this paper, we give a method to compute the equivalent matrix for a set of differential-algebraic equations. Specifically, the algorithm is illustrated for the modified nodal analysis (MNA). A benefit of using MNA formulation is that equation formulation is straightforward and computer-aided analysis of large Circuits is simplified. Another benefit is that inconsistent initial conditions in the analysis of switched Circuits is automatically and correctly handled by the algorithm. Comparison with the state variable approach is made, and application to the simulation of Linear Circuits is given. The method is based on circuit theory concepts accessible to all electrical engineers. In addition to the transition matrix, a numerical method to compute the zero state response of Linear Circuits for a restricted set of inputs is given. The transition matrix along with the zero state response results in a special algorithm that is used to compute the time response of lumped Linear time-invariant Circuits at equally spaced intervals of time. This method is compared with the solution of Linear Circuits by SPICE-like simulators.

  • Efficient transient solution of Linear Circuits to sinusoidal inputs
    IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 1995
    Co-Authors: K. Raahemifar, A. Opal
    Abstract:

    In this paper, an efficient method for time domain solution of Linear Circuits to sinusoidal inputs is given. If the transient response of the circuit at frequency /spl omegasub 1/ is known, the method efficiently computes the response at another frequency /spl omegasub 2/. The results are obtained by one frequency solution of the circuit for each additional frequency of interest. Applications include simulation of periodically switched Linear Circuits; examples include switched capacitor, switched current, and sigma-delta modulators. >

  • ISCAS - Zero state response of Linear Circuits to exponential inputs
    Proceedings of ISCAS'95 - International Symposium on Circuits and Systems, 1
    Co-Authors: K. Raahemifar, A. Opal
    Abstract:

    In this paper an efficient method for calculating the zero state response of Linear time invariant Circuits is given. The input, in general, is a complex exponential function of time, of which step and sinusoidal functions are special cases. The method gives an algebraic relationship between the response due to two arbitrary exponential inputs. If the transient response due to one input is known, then the response due to the other input can be computed by the solution of a system of Linear equations. No approximation is made in the derivation, and they are valid for all time and all exponential inputs. The method is useful in reducing the computational costs of analyzing periodically switched Linear networks, such as, switched capacitor and switched current Circuits.

K. Raahemifar - One of the best experts on this subject based on the ideXlab platform.

  • Efficient transient solution of Linear Circuits to sinusoidal inputs
    IEEE Transactions on Circuits and Systems I: Fundamental Theory and Applications, 1995
    Co-Authors: K. Raahemifar, A. Opal
    Abstract:

    In this paper, an efficient method for time domain solution of Linear Circuits to sinusoidal inputs is given. If the transient response of the circuit at frequency /spl omegasub 1/ is known, the method efficiently computes the response at another frequency /spl omegasub 2/. The results are obtained by one frequency solution of the circuit for each additional frequency of interest. Applications include simulation of periodically switched Linear Circuits; examples include switched capacitor, switched current, and sigma-delta modulators. >

  • ISCAS - Zero state response of Linear Circuits to exponential inputs
    Proceedings of ISCAS'95 - International Symposium on Circuits and Systems, 1
    Co-Authors: K. Raahemifar, A. Opal
    Abstract:

    In this paper an efficient method for calculating the zero state response of Linear time invariant Circuits is given. The input, in general, is a complex exponential function of time, of which step and sinusoidal functions are special cases. The method gives an algebraic relationship between the response due to two arbitrary exponential inputs. If the transient response due to one input is known, then the response due to the other input can be computed by the solution of a system of Linear equations. No approximation is made in the derivation, and they are valid for all time and all exponential inputs. The method is useful in reducing the computational costs of analyzing periodically switched Linear networks, such as, switched capacitor and switched current Circuits.

Amedeo Premoli - One of the best experts on this subject based on the ideXlab platform.

  • PILA: a computer program for fast and accurate analysis of piecewise Linear Circuits
    1988. IEEE International Symposium on Circuits and Systems, 1
    Co-Authors: Mario Biey, Martin Hasler, R. Lojacono, Amedeo Premoli
    Abstract:

    The computer program PILA, which is designed for the fast and accurate analysis of moderately-sized piecewise-Linear Circuits, is described. Since PILA does not use numerical integration, it is particularly useful for exploring the qualitative behavior of Circuits with complicated time evolutions, e.g. in the presence of chaotic solutions. The computational accuracy and the capability to deal with Linearly dependent capacitor charges and inductor fluxes are highlighted with two examples. >

M.m. Hassoun - One of the best experts on this subject based on the ideXlab platform.

  • ISCAS - Direct hierarchical symbolic transient analysis of Linear Circuits
    Proceedings of IEEE International Symposium on Circuits and Systems - ISCAS '94, 1
    Co-Authors: S.e. Greenfield, M.m. Hassoun
    Abstract:

    This paper presents a new direct and hierarchical symbolic transient analysis method for Linear Circuits. Three integration models were implemented symbolically with the trapezoidal method being the most efficient in terms of number of operations. An evaluation algorithm was implemented with a step sizing method based on estimation of truncation error. Test results show the success of the implementation and illustrate the automatic step reduction process necessary to retain numerical evaluation accuracy. >

M. Artioli - One of the best experts on this subject based on the ideXlab platform.

  • IMe: 4-term formula method for the symbolic analysis of Linear Circuits
    IEEE Transactions on Circuits and Systems I: Regular Papers, 2004
    Co-Authors: F. Filippetti, M. Artioli
    Abstract:

    This paper is intended to show a general method (inhibition method) that relies on the superposition principle to analyze Linear systems and electric Circuits, based on hierarchical sequences of more simple topologies with some inhibited elements and on a simple recollecting logic to calculate the final solution from the previous partial and more elementary solutions. The result of the analysis is represented by and stored into a table (called the inhibition sequence table), which thus consists in a kind of database for the system or electric circuit being analyzed. The method follows a hierarchical structuration that is halfway physical (the hierarchical blocks have a nonabstract meaning) and halfway logical (the relationships among the blocks carry out information richer than the hierarchy itself). Once the table is calculated for a particular system, then a little calculation overhead allows some other interesting features, like the possibility to analyze an old circuit with some new branches added by analyzing the new elements only, or like the calculation of exact sensitivities without using derivatives, or like the calculation of the inverse matrix avoiding the usual matrix inversion procedure. A proof of the Inhibition Theorem is given and also some tutorial circuit examples.