Circuit for controlling a piezo-electric positioning element

Details Circuit for controlling a piezo-electric positioning element Circuit for controlling a piezo-electric positioning element

1979-05-21

1981-03-31

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

310326, H01L 4108

Patent

active

042596050

ABSTRACT:
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.

REFERENCES:
patent: 2651012 (1953-09-01), Valkenburg et al.
patent: 3296467 (1967-01-01), Locher
patent: 3409787 (1968-11-01), Agalides et al.
patent: 3532911 (1970-10-01), Roberts et al.
patent: 3821747 (1974-06-01), Mason
patent: 4106065 (1978-08-01), Ravizza

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