Simulation and Analysis of Behavioral Analog Systems
Ekambaram, Uma
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https://hdl.handle.net/2142/81241
Description
Title
Simulation and Analysis of Behavioral Analog Systems
Author(s)
Ekambaram, Uma
Issue Date
1998
Doctoral Committee Chair(s)
Kang, S.M.
Department of Study
Electrical Engineering
Discipline
Electrical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Electronics and Electrical
Language
eng
Abstract
Periodic circuits and systems which are stiff pose special problems to traditional simulators like SPICE due to the wide separation in time constants characterizing them. Examples of such systems include power electronic circuits, phase-locked loops and RF circuits such as narrow-band amplifiers and mixers. The current trend towards integrating analog and digital components on a single chip has created a need for algorithms which can handle multiple components described at different levels of abstraction. This research focuses on developing techniques and algorithms for the simulation of such circuits. The new algorithms take advantage of the periodic nature of the circuit characteristics and provide improved simulation efficiency over existing techniques. The key contributions are the shooting-Broyden algorithm for time-domain steady state analysis and the envelope-following-Broyden algorithm for tracing the envelope of waveforms. Autonomous algorithms using the quasi-Newton technique have also been studied. The ability of these algorithms to handle circuits and systems described at multiple levels of abstraction and in different domains is unique. These algorithms are demonstrated to be the methods of choice for time-domain analysis of periodic systems. The algorithms have been implemented and tested in the simulator iMACSIM-ss and some behavioral blocks have been developed for power electronic circuits.
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