Automatic head scan tracking system

Details Automatic head scan tracking system Automatic head scan tracking system

1977-09-30

1979-03-06

Konick, Bernard

Dynamic magnetic information storage or retrieval

Record editing

360 70, 360 77, G11B 2110, G11B 2118, H04N 578

Patent

active

041434056

ABSTRACT:
An automatic head scan tracking system for a video tape player includes a bi-morph leaf mounting a magnetic head on a drum rotatable for scanning the head across a magnetic tape having video signals recorded thereon in successive parallel tracks, the bi-morph leaf mounting the head for movement by a deflection signal applied thereto in either direction transverse to the direction of scan of the head across the tape, a generator of a sawtooth signal having a predetermined slope which, when applied to the bi-morph leaf, deflects the latter to cause the direction of the head scan across the tape to coincide with the direction of the recorded track, a circuit for producing timing signals indicating the rotational position of the magnetic head with respect to the beginning of a scan of the tape, and a circuit responsive to the timing signals and associated with the sawtooth signal generator for adjusting the starting point of the predetermined slope of the sawtooth signal so as to occur sufficiently in advance of the beginning of a scan of the tape by the magnetic head for dissipating any transient vibrations of the bi-morph leaf prior to the commencement of the scan.

REFERENCES:
patent: 3375331 (1968-03-01), Okazaki et al.
patent: 3526726 (1970-09-01), Corbett et al.
patent: 3787616 (1974-01-01), Falk et al.
patent: 4080636 (1978-03-01), Ravizza

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