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. 31, 1992
Filed:
Aug. 07, 1989
Yasuo Mitsuhashi, Nagaokakyo, JP;
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
While prior art apparatus for magnetic recording and playback (VTRs) were unable to perform magnetic recording of an FM signal with an optimum recording current responding to change of the optimum recording current dependent on kinds of magnetic tapes used and wear of heads, the magnetic recording of an FM signal with the optimum recording current at all times has been made possible by having a recorded signal along a track of a magnetic tape read by a level servo head scanning the track following the signal recording and having the recording current controlled to be optimized by use of a recording current controlling device based on the playback signal output from the level servo head. As a result, improvement of the S/N ratio and automatic adjustment of the recording current can be achieved. Further, by means of a head drive unit, the position of the level servo head is finely adjusted so that the control for optimization of the recording current is performed accurately.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile