Charge‐mode interfacing of piezoelectric interdigital Lamb wave transducers. Issue 11 (1st May 2016)

• Record Type: Journal Article
• Authors: Giannelli, P.; Bulletti, A.; Capineri, L.
• Is Part Of: Electronics letters. Volume 52:Issue 11(2016)
• Page Start: 894
• Page End: 896
• Publication Date: 2016-05-01
• Subjects: piezoelectric transducers -- surface acoustic waves -- polymer films -- data acquisition -- aluminium; charge‐mode interfacing -- piezoelectric interdigital Lamb wave transducers -- charge‐mode amplification -- voltage‐mode amplification -- polymer film -- data acquisition electronics -- charge amplifier -- instrumentation amplifier -- Al; Electronics -- Periodicals; 621.381
• DOI: 10.1049/el.2016.0804
• Languages: English
• ISSNs: 0013-5194

Abstract

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.