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:
May. 04, 1993
Filed:
Jul. 03, 1990
Shunji Kitamura, Hanno, JP;
Katsuhiko Kaida, Mizuho, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
In a head driving control apparatus used, for example, in a hard disc drive, a peak detector detects a peak value of a servo signal output from a data head. A CPU detects a thermal off-track distance L of the data head, on the basis of the peak value of the servo signal. When the thermal off-track distance L is within an allowable off-track distance Lw in a data write mode or within an allowable off-track distance Lc in a data read mode, the CPU enables a data write operation or a data read operation. When the thermal off-track distance L is without the allowable off-track distance Lw in the data write mode or without the allowable off-track distance Lc in the data read mode, the CPU prohibits the data write operation or the data read operation.