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:
Nov. 30, 2004
Filed:
Jul. 28, 2000
Michio Matsuura, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A method and apparatus for magnet-optical recording are provided that can reduce heat in pulse driving of a magnetic head coil of a magnet-optical recording apparatus. Data inversion detection means generates a signal TRDET that becomes the high level when a magnetic inversion of data occurs and becomes the low level when no magnetic inversion of data occurs. Means for reducing an exciting energy use this signal TRDET so as to generate a strobe signal STRB that has a short period of the high level when a magnetic inversion of data occurs and a normal period of the high level when no magnetic inversion of data occurs. The magnetic head coil is excited during a period in which the strobe signal STRB is the high level, so that the pulsed magnetic field is generated, which is applied to a magnet-optical recording medium.