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oai:www.ideals.illinois.edu:2142/46714 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Using x-parameters for signal integrity applications text Schutt-Ainé, José E. Schutt-Ainé, José E. Bernhard, Jennifer T. Cangellaris, Andreas C. Franke, Steven J. Comberiate, Thomas M. 2014-01-16T18:00:03Z 2014-01-16T18:00:03Z 2013-12 2014-01-16T18:00:03Z 2013-12 X-parameters, the nonlinear extension of scattering parameters, have been shown to have a wide array of applications in the modeling of nonlinear devices and systems. In this dissertation, the use of X-parameters is extended to signal integrity applications, particularly to the modeling of input/output buffers. These input/output buffers are the nonlinear terminations of the high-speed links that the signal integrity engineer is tasked with designing and optimizing. Brief treatments of the X-parameter formalism, the harmonic balance simulation method, the latency insertion method, and the Input/Output Buffer Information Specification (IBIS) are provided as background information along with some examples of how X-parameters are generated via simulation and measurement and used in simulation. Two processes for using X-parameters for signal integrity purposes, lim2x and x2ibis, are described and analyzed in detail. The process lim2x uses the latency insertion method to perform a transient simulation of a given circuit with specific port stimuli and terminations. It then uses Fourier analysis to extract X-parameters from the simulation results. This process leverages the linear numerical complexity of the latency insertion method to provide a viable X-parameter generation platform that is well-suited for very large, high-frequency circuits, particularly those which are seen in input/output buffers. The lim2x process is demonstrated on a simple buffer circuit. The X-parameters generated from it are compared to those generated with harmonic balance and are shown to be in excellent agreement. IBIS models are the current standard for modeling input/output buffer circuits. The process x2ibis uses X-parameter models to generate the current-voltage and voltage-time tables used in an IBIS file. This process shows that properly generated X-parameter models contain the information needed to describe the behavior of an input/output buffer. Results are compared with those of another method of IBIS model generation. Item withdrawn by Laura Spradlin (lspradl2@illinois.edu) on 2013-11-20T20:33:04Z Item was in collections: University of Illinois Theses & Dissertations (ID: 1) No. of bitstreams: 2 Comberiate_Thomas.tex: 186718 bytes, checksum: 74d490999218a4c1c2e9b1ba502777e6 (MD5) Comberiate_Thomas.pdf: 11926983 bytes, checksum: e8ab0f8a08106887d8823e8f5f868cbd (MD5) Made available in DSpace on 2014-01-16T18:00:03Z (GMT). No. of bitstreams: 3 Thomas_Comberiate.pdf: 11926983 bytes, checksum: e8ab0f8a08106887d8823e8f5f868cbd (MD5) Comberiate_Thomas.tex: 186718 bytes, checksum: 74d490999218a4c1c2e9b1ba502777e6 (MD5) license.txt: 4067 bytes, checksum: 746f99b6fa74e83d8f8328953f8c0749 (MD5) http://hdl.handle.net/2142/46714 en Copyright 2013 Thomas Matthew Comberiate X-parameters signal integrity Latency insertion method (LIM) high-speed link nonlinear vector network analyzer Electrical & Computer Eng 1933 Electrical & Computer Engr 1200 University of Illinois at Urbana-Champaign Dissertation Ph.D. PHD:Electr & Computer Eng-UIUC 10KS1200PHD