System for reproducing a video signal recorded in parallel track

Details System for reproducing a video signal recorded in parallel track System for reproducing a video signal recorded in parallel track

1978-08-25

1980-04-08

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 84, 360107, 360109, G11B 2110, G11B 2104, G11B 552

Patent

active

041975650

ABSTRACT:
In a video signal reproducing system, a head-position control circuit includes a magnetic head scanning a magnetic recording medium for recording and reproducing signals in a recorded track thereon; a head-support member including a piezo-ceramic element supporting the magnetic head ona rotary part, for example of a guide drum; a rotary transformer having a primary coil in a stationary part and a secondary coil in the rotary part; a control signal generator for producing a tracking control signal which corresponds to the signal due to the mis-tracking of the magnetic head relative to a predetermined section of the recorded track, the head-support member being responsive to the tracking control signal to displace the magnetic head transversely with respect to the track section to maintain substantial alignment between the magnetic head and the track section; the tracking control signal being supplied to the primary coil of the rotary transformer; and a control signal processing circuit connected between the secondary coil of the rotary transformer and the head-support member.

REFERENCES:
patent: 3699247 (1972-10-01), Mashima
patent: 3905043 (1975-09-01), Frank
patent: 4056832 (1977-11-01), de Boer
patent: 4096535 (1978-06-01), Highnote
patent: 4099210 (1978-07-01), Dolby
patent: 4099211 (1978-07-01), Hathaway
patent: 4110799 (1978-08-01), Bergmans

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