Eine selbstkonsistente Carleman Linearisierung zur Analyse von Oszillatoren
Harry Weber
CORRESPONDING AUTHOR
Institut für Theoretische Elektrotechnik, Leibniz Universität
Hannover, 30167, Hannover, Deutschland
Wolfgang Mathis
Institut für Theoretische Elektrotechnik, Leibniz Universität
Hannover, 30167, Hannover, Deutschland
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Cited articles
Buonomo, A. and Schiavo, A. L.: Modelling and analysyis of differential VCOs, International Journal of Circuits Theory and Applications, 32, 3, https://doi.org/10.1002/cta.270, 2004.
Carleman, T.: Application de la théorie des équations intégrales linéaires aux systèmes d'équations différentielles non linéaires, Acta Mathematica, 59, 1, https://doi.org/10.1007/BF02546499, 1932.
Chua, L. O., Desoer, C. A., and Kuh, E. S.: Linear and Nonlinear Circuits, McGraw-Hill Book Company, Singapur, 1987.
Griva, I., Nash, S. G., and Sofer, A.: Linear and Nonlinear Optimization: Second Edition, Siam, Philadelphia, 2009.
Guckenheimer, J. and Holmes, P.: Nonlinear Oscillation, Dynamical Systems and Bifurcations of Vector Fields, Springer, 2002.
Hegazi, E., Rael, J., and Abidi, A.: The Designer's Guide to High-Purity Oscillators, Kluwer Academic Publishers, Dordrecht, Netherlands, 2005.
Kerner, E. H.: Universal formats for nonlinear ordinary differential systems, J. Math. Phys., 22, 7, https://doi.org/10.1063/1.525074, 1981.
Kowalski, K.: Nonlinear dynamical systems and classical orthogonal polynomials, J. Math. Phys., 38, 5, https://doi.org/10.1063/1.531990, 1997.
Kowalski, K. and Steeb, W.-H.: Nonlinear Dynamical Systems and Carleman Linearization, World Scientific, Singapur, 1991.
Lesky, P.: Die charakterisierung der klassischen orthogonalen polynome durch Sturm-Liouvillesche Differentialgleichungen, Arch. Ration. Mech. An., 10, 1, https://doi.org/10.1007/BF00281200, 1962.
Mathis, W.: Nonlinear electronic circuits – An overview, Proc. International Conference Mixed Design of Integrated Circuits and Systems, 2000.
Mathis, W. and Bremer, J.-K.: Design of nonlinear CMOS circuits in the Nano-GHz Era and its mathematical challenges, Math. Comput. Simulat., 82, 3, https://doi.org/10.1016/j.matcom.2010.10.013, 2011.
Philippow, E.: Nichtlineare Elektrotechnik, Akademische Verlagsgesellschaft, Leipzig, 1971.
Rudin, W.: Real and Complex Analysis, McGraw-Hill Book Company, Singapur, 1987.
Steeb, W.-H. and Wilhelm, F.: Non-Linear Autonomous Systems of Differential Equations and Carleman Linearization Procedure, J. Math. Anal. Appl., 77, 2, https://doi.org/10.1016/0022-247X(80)90250-4, 1980.
Tsividis, Y. and Andrew, C. M.: Operation and Modeling of the MOS Transistor, Oxford University Press, 2011.
Weber, H. and Mathis, W.: A Self-consistent Carleman Linearization Technique for the Large Signal Analysis of Nonlinear Circuits, IEEE International Symposium on Circuits and Systems (ISCAS 2016), https://doi.org/10.1109/ISCAS.2016.7538984, 2016.
Short summary
In diesem Beitrag wird eine selbstkonsistente Carleman Linearisierung zur Untersuchung von Oszillatoren vorgestellt. Anstelle einer linearen Näherung um einen Arbeitspunkt, erfolgt mit Hilfe der selbstkonsistenten Carleman Linearisierung eine Approximation auf einem vorgegebenen Gebiet. Um in Anschluss das stationäre Verhalten von Oszillatoren zu beschreiben, wird die Berechnung einer Poincaré-Abbildung durchgeführt. Mit dieser ist eine anschließende Analyse des Oszillators möglich.
In diesem Beitrag wird eine selbstkonsistente Carleman Linearisierung zur Untersuchung von...