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

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1 Author(s)
Narhi, T. ; ESA-ESTEC European Space Agency, Noordwijk, Netherlands

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.<>

Published in:

Microwave Symposium Digest, 1993., IEEE MTT-S International

Date of Conference:

14-18 June 1993