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:
Dec. 25, 1990
Filed:
Jun. 01, 1989
Applicant:
Inventor:
Shiro Ogura, Kamakura, JP;
Assignee:
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11B / ;
U.S. Cl.
CPC ...
360 7711 ; 360 7703 ;
Abstract
In the magnetic disk apparatus according to the invention, the latch circuit latches the content of the logic signal provided from the comparative operational circuit at the end of the seek operation and holds the latched content during a track trace operation, and the linear position signal selected to constitute a closed loop positioning system is fixed to that at the end of seek operation for controlling the head position, so that recoverable allowance of the deviation from the center of the desired track (i.e., off-track amount) of the head at the time of the track trace operation can be increased to increase the reliability of seek operation.