Open AccessCharge‐mode interfacing of piezoelectric interdigital Lamb wave transducers
Author(s) -
Giannelli P.,
Bulletti A.,
Capineri L.
Publication year - 2016
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
ISSN - 1350-911X
DOI - 10.1049/el.2016.0804
Subject(s) - interfacing , amplifier , transducer , charge amplifier , electrical engineering , piezoelectricity , materials science , mode (computer interface) , voltage , charge (physics) , electronics , optoelectronics , acoustics , operational amplifier , engineering , physics , computer science , cmos , computer hardware , operating system , quantum mechanics
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 A 0 ‐mode Lamb wave transmission over an aluminium plate, demonstrate the effectiveness of charge‐mode interfacing and its insensitivity to cable loading.