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:
Feb. 21, 1984
Filed:
Nov. 28, 1980
Peter J Vogelgesang, Roseville, MN (US);
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
An assembly for use in an analog audio record/playback or playback system to achieve and maintain the same phase relationship between the recorded signals upon playback, as was present when the signals were originally recorded comprising generally, playback transducer means including a playback head, phase comparison to determine the phase relationship of the signal played back by the playback transducer means and to output a signal which is proportional to the magnitude and direction of any phase difference present, and electrically responsive driver means to adjust the playback transducer means to dynamically compensate for the phase error by rotating the playback head.