The adoption of charge-mode amplification, rather than the classical voltage-mode, to interface piezoelectric interdigital transducers made of polymer film to the data acquisition electronics is described. The circuit and operating principles of a charge amplifier are briefly explained, followed by the experimental comparison of a charge amplifier implementation with a solution based on an instrumentation amplifier. The experiments, based on A0-mode Lamb wave transmission over an aluminium plate, demonstrate the effectiveness of charge-mode interfacing and its insensitivity to cable loading.
Charge-mode interfacing of piezoelectric interdigital Lamb wave transducers / Giannelli, Pietro; Capineri, Lorenzo; Bulletti, Andrea. - In: ELECTRONICS LETTERS. - ISSN 0013-5194. - ELETTRONICO. - 52:(2016), pp. 894-896. [10.1049/el.2016.0804]
Charge-mode interfacing of piezoelectric interdigital Lamb wave transducers
GIANNELLI, PIETRO;CAPINERI, LORENZO;BULLETTI, ANDREA
2016
Abstract
The adoption of charge-mode amplification, rather than the classical voltage-mode, to interface piezoelectric interdigital transducers made of polymer film to the data acquisition electronics is described. The circuit and operating principles of a charge amplifier are briefly explained, followed by the experimental comparison of a charge amplifier implementation with a solution based on an instrumentation amplifier. The experiments, based on A0-mode Lamb wave transmission over an aluminium plate, demonstrate the effectiveness of charge-mode interfacing and its insensitivity to cable loading.File | Dimensione | Formato | |
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