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: In this circuit transformation, the shortcircuit transfer function of the resulting circuit is then exactly the same as the open-circuit voltage transferfunction of the original circuit.
Abstract: In this circuit transformation, the short-circuit transfer function of the resulting circuit is then exactly the same as the open-circuit voltage transfer function of the original circuit
73 citations
10 Nov 1996
TL;DR: New analytical delay models based on the first and second moments of the interconnect transfer function when the input is a ramp signal with finite rise time are developed.
Abstract: Elmore delay has been widely used as an analytical estimate of interconnect delays in the performance-driven synthesis and layout of VLSI routing topologies. However, for typical RLC interconnections with ramp input, Elmore delay can deviate by up to 100% or more from SPICE-computed delay since it is independent of rise time of the input ramp signal. We develop new analytical delay models based on the first and second moments of the interconnect transfer function when the input is a ramp signal with finite rise time. Delay estimates using our first moment based analytical models are within 4% of SPICE-computed delay, and models based on both first and second moments are within 2.3% of SPICE, across a wide range of interconnect parameter values. Evaluation of our analytical models is several orders of magnitude faster than simulation using SPICE. We also describe extensions of our approach for estimation of source-sink delays in arbitrary interconnect trees.
72 citations
TL;DR: In this article, a current control method based on a sinusoidal internal model is employed, which uses a sine transfer function with a specified resonant frequency, which is called an S compensator.
Abstract: Three-phase voltage-source converters are used as a utility interface. In such a case, the converter line currents are required to track sinusoidal references synchronized with the utility grid without steady-state error. In this paper a current control method based on a sinusoidal internal model is employed. The method uses a sine transfer function with a specified resonant frequency, which is called an S compensator. The combination of a conventional PI compensator and an S compensator is called a PIS compensator. The PIS compensator ensures that the steady-state error in response to any step changes in a reference signal at the resonant frequency and zero hertz reduces to zero. An experiment was carried out using a 1-kVA prototype of three utility interface converters, a voltage-source rectifier, an active power filter, and STATCOM. Almost perfect current tracking performance can be observed. © 2004 Wiley Periodicals, Inc. Electr Eng Jpn, 150(3): 54–61, 2005; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/eej.20064
72 citations
TL;DR: The applications in digital image sharpening and parameter estimation of fractional noise process are studied to demonstrate the usefulness of this new design approach.
Abstract: In this paper, the design of fractional order digital differentiator is investigated. First, the radial basis function interpolation method is described. Then, the non-integer delay sample estimation of discrete-time sequence is derived by using the radial basis function interpolation approach. Next, the Grunwald-Letnikov derivative and non-integer delay sample estimation are applied to obtain the transfer function of fractional order digital differentiator. Finally, the applications in digital image sharpening and parameter estimation of fractional noise process are studied to demonstrate the usefulness of this new design approach.
72 citations
01 Jan 1993
TL;DR: Simulated and experimental results for a second-order plant show that identification can be satisfactorily achieved and that neural network identifiers can represent nonlinear plant characteristics very well.
Abstract: A practical neural network design method for the identification of both the direct transfer function and inverse transfer function of an object plant is proposed. As a practical application of the direct transfer function identifier, a nonlinear plant simulator is also proposed. Simulated and experimental results for a second-order plant show that identification can be satisfactorily achieved and that neural network identifiers can represent nonlinear plant characteristics very well. The characteristics of a neural network direct controller with a feedback control loop, which uses the learning results of the inverse transfer function identifier, is also proposed and confirmed. >
72 citations