Analysis of strongly nonlinear circuits with a frequency-domain method coupled with a consistent large-signal model

An analysis method that extends the applicability of frequency-domain methods to strongly nonlinear circuits is described. Nonlinearities are described with Chebyshev expansions which are evaluated with a numerically stable three-term recurrence formula. The method is coupled with a novel, measureme...

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Bibliographic Details
Main Author: Narhi, T.
Format: Conference Proceeding
Language:English
Subjects:
Analytical models
Chebyshev approximation
Computational modeling
Coupled mode analysis
Coupling circuits
Distortion measurement
Frequency dependence
Frequency domain analysis
Frequency measurement
Nonlinear circuits
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Description
Summary:An analysis method that extends the applicability of frequency-domain methods to strongly nonlinear circuits is described. Nonlinearities are described with Chebyshev expansions which are evaluated with a numerically stable three-term recurrence formula. The method is coupled with a novel, measurement-based consistent modeling approach which allows improved accuracy in describing the frequency dependence of the measured small-signal parameters. The analysis method and modeling approach are experimentally verified by comparing measured and simulated results on a monolithic MESFET operating as mixer. The efficiency of the frequency-domain method is demonstrated by analyzing the intermodulation distortion of the mixer with three independent tones and over 100 frequencies, driven past saturation with strong RF signals, on a personal computer.< >
ISSN:0149-645X
2576-7216
DOI:10.1109/MWSYM.1993.276986