Title :
Parametric small signal amplification near bifurcations [ferroelectrics]
Author :
Diestelhorst, M. ; Beige, H. ; Kapsch, R.-P.
Author_Institution :
Fachbereich Physik, Martin-Luther-Univ., Halle-Wittenberg, Germany
Abstract :
The nonlinear dielectric properties of ferroelectrics during polarization reversal are used to amplify small periodic perturbations. The ferroelectric serves as a nonlinear capacitor in a series-resonance circuit. The inductance is a linear one. Such a series-resonance circuit is a system which offers many features of nonlinear dynamical systems. It is possible to observe different types of bifurcations (pitchfork bifurcations, period-doubling cascades and chaotic behaviour) well known from the theory of nonlinear dynamical systems. Near such bifurcations the system can amplify suitable chosen periodic perturbations. These perturbations are coupled into the system by amplitude modulation of the driving voltage. Different types of bifurcations have been investigated concerning their ability of amplifying small signals
Keywords :
bifurcation; chaos; circuit resonance; dielectric polarisation; ferroelectric capacitors; ferroelectric devices; ferroelectric switching; nonlinear dynamical systems; nonlinear network analysis; parametric amplifiers; amplitude modulation; bifurcations; chaotic behaviour; driving voltage; ferroelectrics; inductance; nonlinear capacitor; nonlinear dielectric properties; nonlinear dynamical systems; parametric small signal amplification; period-doubling cascades; periodic perturbations; pitchfork bifurcations; polarization reversal; series-resonance circuit; small periodic perturbations; Amplitude modulation; Bifurcation; Capacitors; Chaos; Circuits; Dielectrics; Ferroelectric materials; Inductance; Nonlinear dynamical systems; Polarization;
Conference_Titel :
Applications of Ferroelectrics, 1994.ISAF '94., Proceedings of the Ninth IEEE International Symposium on
Conference_Location :
University Park, PA
Print_ISBN :
0-7803-1847-1
DOI :
10.1109/ISAF.1994.522431
