1,721,114 research outputs found
Foreword Proceedings 2011 IEEE 15th Workshop on Signal Propagation on Interconnects, SPI 2011
No full textTIME-DOMAIN TWO-PORT REPRESENTATION OF SOME NONUNIFORM TWO-CONDUCTOR TRANSMISSION LINES
No full textThis brief proposes a new procedure to extend to nonuniform transmission lines, a time-domain model commonly used to describe uniform transmission lines. The line is represented at its terminations as a dynamic two-port, where each port is composed by a dynamic one-port connected in series with a controlled voltage source. The procedure is applied to nonuniform lines with exponential, linear and Gaussian profile of the parameters. The numerical analysis of some case-studies is carried out
EFFICIENT TIME-DOMAIN SIMULATION OF LOSSY MULTICONDUCTOR TRANSMISSION LINES BY MEANS OF GENERALIZED METHOD OF CHARACTERISTICS
No full textIDENTIFICATION OF A SPICE REDUCED-ORDER MODEL FOR LOSSY INTERCONNECTS FROM TERMINAL BEHAVIOR
No full textEfficient Inclusion of Layered Media Green’s Functions in Full-wave Analysis of Microstrips
No full textInclusion of planar layered media Green's Functions (GFs) is a major issue in the computational efficiency of full-wave models derived from integral formulations. These GFs may be decomposed into quasi-dynamic and dynamic terms. In a wide range of practical applications, the quasi-dynamic terms may be given in closed form. This paper proposes two criteria to establish when the complete GFs may be approximated by the quasi-dynamic terms. These criteria are based on simple relations between frequency, line length, dielectric thickness and permittivity. If these criteria are satisfied, the inclusion of the GFs into full-wave integral models is straightforward and the overall computational cost is strongly reduced. The proposed criteria are verified through a benchmark test case. The model is then used to perform a full-wave analysis of the power lost in a microstrip, as a consequence of the excitation of parasitic modes, such as surface and leaky waves
On the dynamic equations of linear multiconductor transmission lines with terminal nonlinear multiport resistors
No full textDistributed circuits composed of linear multiconductor transmission lines and terminated with nonlinear weakly active multiport resistors are considered. The line is represented as a linear dynamic multiport through recursive convolution relations and special considerations are given to some general properties of the line impulse responses. The convolution technique allows the mathematical description of these distributed circuits by means of a sea: of nonlinear algebraic-integral equations of Volterra type for the terminal voltages and currents. The conditions under which these governing equations can he reformulated as a set of Volterra integral equations of second kind in normal form are given with the explicit means for doing so. These conditions also assure the existence and the uniqueness of the solution. In particular if the terminal multiport resistors are strictly locally passive, then the normal form exists and the solution is unique. Transmission lines with terminal multiport resistors that are locally active may not admit a normal form for the governing equations, and hence, several solutions that have the same initial conditions are possible, In these cases a simple method is presented for revising the original network model so that the normal form exists, and hence, the uniqueness of solution is assured, under mild restrictions
2012 IEEE 16th Workshop on Signal and Power Integrity, SPI 2012 - Proceedings
No full textThe proceedings contain 32 papers. The topics discussed include: broadband performance of 110 GHz Interconnects built in HRSi-based membrane technology; skinny trace compensation methodology for high speed serial interface; 2-channel 2-layer inner-stack memory-module design for LPDDR2/3 dram; the role of impedance control in early detection of interconnect degradation using time domain reflectometry; electrothermal reduced equivalents of highly integrated systems with multi-port positive fraction foster expansion; method of moment solution of surface-volume-surface electric field integral equation for two-dimensional transmission lines of complex cross-sections; efficient inclusion of layered media green-functions in full-wave analysis of microstrips; electromagnetic modeling of non-uniform through-silicon via (TSV) interconnections; and tree-based sequential sampling algorithm for scalable macromodeling of high-speed systems
DUAL FORMULATIONS FOR ERROR ESTIMATION IN NONUNIFORM TRANSMISSION LINES
No full textA time domain discrete model for non uniform transmission lines, based on a complementary formulation of the transmission line equations, is considered. By recasting the line equations in terms of flux and charge, one has to discretise alternatively only one of the two equations, the other being exactly verified. This approach has been widely used in electromagnetics to evaluate discretization error. With reference to simple examples, we show how the error estimation can be used for a selective meshing of the line, leading to much better approximation with the same computational effort
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