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. 30, 1999
Filed:
Jul. 22, 1997
Toshiaki Iwanaga, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
The magneto-optical disk recording device disclosed is for recording and reproduction using a one-beam optical head and includes a magneto-optical head, a reproduction amplifier, a recording data delay circuit, a recording state detection circuit, a data comparator circuit, and a record judging circuit. The reproduction amplifier amplifies a magneto-optical reproduction signal read out by the magneto-optical head during the recording. The recording data delay circuit delays a recording data for a predetermined period of time. The recording state detection circuit receives the reproduction signal from the reproduction amplifier and detects a reproduced signal state during the recording. The data comparator circuit receives and compares an output of the recording data delay circuit and an output of the recording state detection circuit, and outputs a record failure signal. The record judging circuit judges whether to skip a record failure region or to verify a recorded state of the data when the record failure signal is outputted from the data comparator circuit. The arrangement enables the verification operation during the recording to be made simple thereby enhancing a recording speed.