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Proceedings Paper

Improved current and charge amplifiers for driving piezoelectric loads
Author(s): Andrew J. Fleming; S. O. Reza Moheimani
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Paper Abstract

Piezoelectric transducers are known to exhibit less hysterisis when driven with current or charge rather than voltage. Despite this advantage, such methods have found little practical application due to the poor low frequency response of present current and charge driver designs. This paper introduces the compliance feedback current driver containing a secondary voltage feedback loop to prevent DC charging of capacitive loads and to compensate for any voltage or current offsets in the driver circuit. Low frequency bandwidths in the milli-Hertz range can be achieved.

Paper Details

Date Published: 31 July 2003
PDF: 11 pages
Proc. SPIE 5052, Smart Structures and Materials 2003: Damping and Isolation, (31 July 2003); doi: 10.1117/12.483971
Show Author Affiliations
Andrew J. Fleming, Univ. of Newcastle (Australia)
S. O. Reza Moheimani, Univ. of Newcastle (Australia)


Published in SPIE Proceedings Vol. 5052:
Smart Structures and Materials 2003: Damping and Isolation
Gregory S. Agnes; Kon-Well Wang, Editor(s)

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