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          University of California at Santa Cruz
Baskin Center for Computer Engineering and Information Sciences 

The following technical report is available electronically or as
a paper copy.  Instructions for getting either follow the abstract.

UCSC-CRL-92-43   (available electronically as ucsc-crl-92-43.ps.Z)
S-PARAMETER BASED MACRO-MODEL OF DISTRIBUTED-LUMPED NETWORKS 
USING PADE' APPROXIMATION
Haifang Liao, Rui Wang, Rajit Chandra, and Wayne Dai
October 1992, 17 pages (paper copy $5.00)

Abstract:  A Scattering-Parameters (S-Parameters) based macromodel of 
distributed-lumped networks is presented, The networks can include 
capacitive cutsets, inductive loops, RLC meshes, and lossy transmission
lines. An efficient network reduction algorithm is developed to reduce 
the original network into a network containing one multiport component 
together with the sources and loads of interest. The S-Parameters of the
circuit components are approximated by Taylor series to simplify the 
reduction process. Pade' approximation is used to derive the macromodel.
The macromodel is very flexible that the accuracy of the model can be 
controlled by adjusting the order of approximation. The experimental 
results indicate that our model can approach the accuracy of SPICE with
one or two order less computing time.
Keywords:  scattering parameter, macromodel, multiport component,
multiport interconnect node, component merging, network reduction, 
capacitive cutsets, inductive loops, RLC meshes, lossy transmission 
line, delay, Taylor series, and Pade' approximation

This technical report is available electronically through either 
of the following methods:
1.  through anonymous ftp from ftp.cse.ucsc.edu, in /pub/tr. Log in 
    as "anonymous", use your email address as your password, specify 
    "binary" before getting the file.  Uncompress before printing.
2.  by mail to automatic mail server rnalib@ftp.cse.ucsc.edu.
    Put this command on the subject line or in the body of the message:
	@@ send ucsc-crl-92-43.ps.Z from tr
    To get the index or abstract list:
	@@ send INDEX from tr
	@@ send ABSTRACTS.1992 from tr
    To get the list of the tr directory:
	@@ list tr
    To get the list of commands and their syntax:
	@@ help commands

Order paper copies from:  Technical Library, Baskin Center for Computer 
Engineering & Information Sciences, UCSC, Santa Cruz  CA  95064.
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