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:
Jun. 13, 2000
Filed:
Feb. 03, 1998
Shoichi Shimizu, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A write current is set to be an optimum write current. The write current is supplied to a recording head when information is recorded on a recording medium. First margin characteristics are measured which are used for obtaining a lower limit value of the write current to be supplied to the recording head. Second margin characteristics are measured which are used for obtaining an upper limit value of the write current to be supplied to the recording head. As the lower limit value of the write current, a write current value is set for which a margin has a predetermined value in the first margin characteristics. As the upper limit value of the write current, a write current value is set for which a margin has a predetermined value in the second margin characteristics. As the optimum write current, a write current is set which has a middle value between the lower limit value of the write current and the upper limit value of the write current.