Drive circuitry for controlling movable video head

Details Drive circuitry for controlling movable video head Drive circuitry for controlling movable video head

1976-04-16

1978-08-08

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 77, 360107, 310330, G11B 552, G11B 2110, G11B 2118

Patent

active

041060652

ABSTRACT:
Improved deflection of a bimorph having a pair of electrically poled piezo-ceramic elements bonded to opposite sides of a common substrate is achieved by applying to each element a deflection voltage whose polarity is always in the poling direction of the element to which it is applied. By maintaining the polarity of the deflection voltages in the poling direction of the piezo-ceramic elements, large amplitude deflection voltages can be used without de-polarizing the piezo-ceramic elements.

REFERENCES:
patent: 3787616 (1974-01-01), Falk et al.
Charles Edmiston, Piezoelectric Ceramic Transducers, Electronic Design, Sept. 1, 1974, pp. 78-82.

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