Drive circuit for controlling a movable magnetic head

Details Drive circuit for controlling a movable magnetic head Drive circuit for controlling a movable magnetic head

G - Physics

11

B

352/21.32

G11B 21/02 (2006.01) G11B 3/12 (2006.01) G11B 5/588 (2006.01) H01L 41/04 (2006.01)

Patent

CA 1115415

ABSTRACT OF THE DISCLOSURE An improved drive circuitry for controlling the deflection of a bimorph comprising a pair of electrically poled piezo-ceramic elements bonded to a common substrate is disclosed which applies deflection voltage in a manner whereby the polarity is always in the poling direction of each of the elements so that depolarization of the piezo- ceramic elements does not occur. The circuitry applies a common polarity D. C. biasing voltage to both of the piezo- ceramic elements of the bimorph and also applies oppositely phased A. C. deflection signals to the respective piezo- ceramic elements.

311849

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