Regensburg 2013 – scientific programme

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DF: Fachverband Dielektrische Festkörper

DF 19: Poster 2

DF 19.21: Poster

Wednesday, March 13, 2013, 15:00–17:30, Poster B2

Time-domain large-signal simulation of electrical equivalent circuits with non-linear components — •Julian Alexander Amani, Tristan Koppe, Hans Hofsäss, and Ulrich Vetter — II. Physikalisches Institut, Georg-August-Universität Göttingen, Deutschland

When investigating dielectric properties of a heterostructure, simulation of electrical equivalent circuits (EECs), modelling the measured impedance response, has proven useful to identify different contributions to the system.

An in-house developed simulation software capable of including arbitrary, even non-linear, resistance or capacitance models is presented. It utilises bias voltage, signal amplitude, frequency and temperature dependence of each element to calculate the impedance response of the circuit. Considering signal amplitude facilitates simulation of non-linear responses, in addition to the linear response of the system. Time-domain analysis permits extraction of the calculated signal over time at each component, thus allowing hypothetical oscilloscope measurements at each, even usually experimentally inaccessible, component.

Variation of additional parameters (e. g. bias voltage, temperature) allows eliminating circuit ambiguity. However, usually the measured frequency response is fitted without varying another parameter or for each variation separately. Since this software considers the response of each element to the varying parameter, the comparison of measured and calculated results is done in the full parameter space instead of fitting single frequency responses.