title: Improved charge amplifier using hybrid hysteresis compensation.
abstract: We present a novel charge amplifier, with a robust feedback circuit and a method for compensating piezoelectric actuator's hysteresis at low frequencies. The amplifier uses a modified feedback circuit which improves robustness to the addition of series load impedance such as in cabling. We also describe a hybrid hysteresis compensation method for enabling the charge amplifier to reduce hysteresis at low frequencies. Experimental results demonstrate the utility of the new amplifier design.
authors.affiliation: Mechanical Engineering Department, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
authors.forename: Darya
authors.initials: D
authors.lastname: Amin-Shahidi
authors.forename: David L
authors.initials: DL
authors.lastname: Trumper