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. 30, 1995
Filed:
May. 22, 1992
Toshiya Akagi, Neyagawa, JP;
Yukinori Okazaki, Hirakata, JP;
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
In an magneto-optic disk apparatus which carries out recording, playback, or erasing of data with a single laser beam, recorded data is read simultaneously with a recording or erasing operation to eliminate the time of waiting for the disk to make a turn. A signal separation circuit 7 is provided for a magneto-optic disk apparatus which carries out recording, playback, erasing of data by applying a laser beam through an optical head 2 to a spot on a magneto-optic disk 3. In a recording or erasing operation, a magneto-optic playback signal 6 obtained from reflected light of a recording or erasing beam is input to the signal separation circuit 7 to separate and output the recorded data signal 8 contained in the magneto-optic playback signal 6 to consequently reading a recorded data signal 10 simultaneously with carrying out a recording or erasing operation.