Positionable element driving circuit

Details Positionable element driving circuit Positionable element driving circuit

1981-01-16

1983-07-26

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

310317, 360107, G11B 2110

Patent

active

043957412

ABSTRACT:
A positionable element driving circuit for driving a positionable element compensates the supplied voltage-position characteristics of a bimorph type piezoelectric element which is used in a track following type video tape recorder/reproducer and which displaces the position of a video head. The supplied voltage to the bimorph type piezoelectric element is generated by an operational circuit which detects the track position of the video head. The circuit of the present invention compensates for the non-linearity and maintains the track following when the video tape recorder/reproducer is switched from one mode to another, e.g. from a still motion mode to a quick motion mode.

REFERENCES:
patent: 3916226 (1975-10-01), Knoll
patent: 4163994 (1979-08-01), Sakamoto et al.
patent: 4172265 (1979-10-01), Sakamoto et al.
patent: 4223358 (1980-09-01), Kubota et al.
patent: 4255771 (1981-03-01), Kubota
patent: 4259605 (1981-03-01), Rijckaert
patent: 4282535 (1981-08-01), Kern et al.
patent: 4295172 (1981-10-01), Fukada

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