Piezo-electric actuator control method and device and variable w

Details Piezo-electric actuator control method and device and variable w Piezo-electric actuator control method and device and variable w

1997-03-28

2000-04-04

Dougherty, Thomas M.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

31031601, G01B 1100, H01L 4109

Patent

active

060465255

ABSTRACT:
This invention provides the easy and consistent displacement control of a piezo-electric actuator for driving the variable wavelength filter used for wavelength multiplexed optical communication, wherein the piezo-electric actuator is controlled once to the initial displacement condition and, thereafter, a driving voltage is applied to the piezo-electric actuator based on the displacement characteristic data stored in a memory circuit for obtaining a desired displacement.

REFERENCES:
patent: 5557156 (1996-09-01), Elings
patent: 5880846 (1999-03-01), Hasman et al.
patent: 5912750 (1999-06-01), Takeda et al.

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