Title:
METHOD AND APPARATUS FOR STABILIZING DISPLACING CHARACTERISTICS OF PIEZOELECTRIC ELEMENT
Document Type and Number:
Japanese Patent JPS6346787
Kind Code:
A
Abstract:
PURPOSE:To be able to early stabilize a variation in a piezoelectric element by overlapping an AC attenuated voltage on a DC voltage and supplying it to the element when displacing the element or when altering its displacement. CONSTITUTION:When a DC application voltage Vd is varied to alter the displacement of a piezoelectric element 1, a detector 3 detects its variation to trigger an AC attenuation voltage source 4. As a result, the AC attenuation voltage VA is output toward an adder 5, and the voltage Vd is overlapped on the voltage VA by the adder 5. When the voltage from the adder 5 is applied to the element 1, its displacement during a transient period is varied in a large amplitude in response to the applied voltage which includes the component of the voltage VA, the variation in the amplitude is attenuated in a short time, and it is shifted to a highly stable range when the applied voltage becomes the component of the voltage Vd.
Inventors:
OGAWA WATARU
OOTA YASUYOSHI
OOTA YASUYOSHI
Application Number:
JP19150686A
Publication Date:
February 27, 1988
Filing Date:
August 14, 1986
Export Citation:
Assignee:
SHIMADZU CORP
International Classes:
H01L41/09; H01L41/08; H02N2/00; (IPC1-7): H01L41/08; H02N2/00
Attorney, Agent or Firm:
Yoshiaki Nishioka (2 outside)