The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 09, 1982
Filed:
Mar. 23, 1978
Raymond F Ravizza, Cupertino, CA (US);
Ampex Corporation, Redwood City, CA (US);
Abstract
In an apparatus for automatically maintaining a transducing head assembly on the proper track, which is particularly adapted for a helical scan recording and/or reproducing apparatus capable of providing special motion effects, movable head automatic position acquisition circuit and method is disclosed. The apparatus is of the type which utilizes transverse positioning of the transducing head assembly to accurately follow a track during reproducing, and at the completion of the reproduction from the track, to properly position the head in position to either reproduce the next adjacent successive track, reproduce the same track or reproduce another track so that the appropriate special motion effect is achieved. In the still frame motion mode of operation, the head is normally reset to rescan one or more tracks repetitively by a head tracking servo. A missing head reset detector circuit detects the failure of the servo to timely reset the head at the end of the scan of the track or tracks and applies a plurality of properly spaced head reset signals to the movable head assembly to position the head so that the tracking servo can acquire control over head tracking.