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Effects of charge collectors in ferroelectric E-field sensors

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4 Author(s)
Ando, B. ; Dipt. di Ing. Elettr. Elettron. e Inf. (DIEEI), Univ. of Catania, Catania, Italy ; Baglio, S. ; Marletta, V. ; Bulsara, A.R.

A nonlinear dynamical system based on ferroelectric capacitors coupled into a unidirectional ring circuit, which under particular conditions exhibits an oscillating regime of behavior, is considered with particular interest for developing novel electric field sensors. For such a device a weak, external, target electric field interacts with the system thus inducing perturbation of the polarization of the ferroelectric material; the target signal can be indirectly detected and quantified via its effect on the system response. The conceived devices exploit the synergetic use of bi-stable ferroelectric materials, micromachining technologies that allow us to address charge density amplification, and implement novel sensing strategies based on coupling non-linear elemental cells. The “charge collector” strategy, already discussed in [1], has been employed to detect the target field. An experimental characterization of the whole circuit, including three cells coupled in a ring configuration, has been carried out. The effect of the dimensions of the charge collectors has also been investigated.

Published in:

Instrumentation and Measurement Technology Conference (I2MTC), 2012 IEEE International

Date of Conference:

13-16 May 2012

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