CONTROLLING A PIEZO-ELECTRIC POSITIONING ELEMENT

摘要

A device for controlling a piezo-electric positioning element. In order to ensure that said element occupies a well-defined rest position, the device comprises a circuit for generating an electrical oscillation whose amplitude decreases to zero as a function of time and which varies symmetrically about a reference value, and for applying said oscillation to the piezo-electric element, so that hysteresis effects are eliminated.