Topic
Transfer function
About: Transfer function is a research topic. Over the lifetime, 14362 publications have been published within this topic receiving 214983 citations. The topic is also known as: system function & network function.
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TL;DR: A novel approach for the analysis of crosstalk, propagation delay, and pulse distortion of interconnects in high-speed integrated circuits, packages, and circuit boards is presented and the weak-coupling assumption is found to be only marginally valid.
Abstract: A novel approach for the analysis of crosstalk, propagation delay, and pulse distortion of interconnects in high-speed integrated circuits, packages, and circuit boards is presented. Based on frequency-domain modal analysis, a set of formulas is derived to describe the voltage and current transfer functions of coupled interconnects with arbitrary linear termination impedances and used to obtain analytical expressions for the time-domain waveforms for lossless multiconductors interconnection lines. The weak-coupling assumption is found to be only marginally valid. In a typical interconnection configuration, the secondary coupling of the disturbed line on the original signal line substantial and must be taken into account for accurate prediction of the waveforms. Simulation results are given to illustrate the influence of the layout parameters of the interconnects and the rise or fall times of the source signal. It is shown that ground conductors need to be placed on both sides of each of the signal lines to reduce crosstalk effectively. However, the presence of the ground conductors increases the layout complexity and results in more severe waveform distortion for the signal on the active line. >
87 citations
Patent•
28 Jul 1993TL;DR: In this paper, the beginning and ending of a process control disturbance response is detected by measuring the measured inputs and process output during the disturbance by moments, which comprise time-weighted integrals performed on the process result output and inputs when the disturbance is a measured disturbance.
Abstract: Multivariable adaptive feedforward control may be accomplished by detecting the beginning and ending of a process control disturbance response, characterizing the measured inputs and process output during the disturbance by moments, which comprise time-weighted integrals performed on the process result output and inputs when the disturbance is a measured disturbance, and relating the characterized inputs and process result output in known general transfer function model equations to generate transfer function parameters which are used to calculate the coefficients of feedforward additive or multiplicative compensators.
87 citations
TL;DR: In this article, the authors present an experimental study on the dynamics of a ducted, conical, laminar premixed flame subjected to acoustic excitation of varying amplitudes.
86 citations
29 Jun 1992
TL;DR: In this paper, state space models for pulse-width-modulated power converters operating at constant switching frequency under current programmed control are derived, where the sample and hold effect of the current loop is considered.
Abstract: State space models are derived for pulse-width-modulated power converters operating at constant switching frequency under current programmed control. One model neglects the sample and hold effect of the current loop and is therefore representative of the traditional approach taken to modeling current programmed converters. The order of the model is the same as that of the power stage. A second state space model which incorporates the sample and hold effect is derived. The order of this model is two higher than that of the power stage. A comparison of the two models clearly demonstrates the superiority of the second modeling approach. As the models are in state space form they may be quite readily used in a computer-aided-design package for general power converter analysis and design, to determine all transfer functions and associated pole/zero locations of interest. >
86 citations
01 Jan 1992
TL;DR: In this article, the authors considered the problem of estimating the transfer function of a linear system, together with the spectral density of an additive disturbance, and showed that the estimates are strongly consistent and asymptotically normal.
Abstract: The problem of estimating the transfer function of a linear system, together with the spectral density of an additive disturbance, is considered. The set of models used consists of linear rational transfer functions and the spectral densities are estimated from a finite-order autoregressive disturbance description. The true system and disturbance spectrum are, however, not necessarily of finite order. We investigate the properties of the estimates obtained as the number of observations tends to oo at the same time as the model order employed tends to oo. It is shown that the estimates are strongly consistent and asymptotically normal, and an expression for the asymptotic variances is also given. The variance of the transfer function estimate at a certain frequency is related to the signal/noise ratio at that frequency and the model orders used, as well as the number of observations. The variance of the noise spectral estimate relates in a similar way to the squared value of the true spectrum.
86 citations