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:
Aug. 14, 1990
Filed:
Nov. 09, 1989
Yutaka Yunoki, Kunitachi, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
Disclosed is a magnetic recording/reproduction apparatus wherein a pulse corresponding to rotation of a magnetic disk is obtained by detecting a PG yoke signal as a rotational position detection index in the disk by a PG coil as a pulse detection means, recording/reproduction control is performed by a control circuit or the like as erase recording/reproduction control means operated in accordance with the pulse, erase and recording/reproduction operations of data are performed with respect to the disk by a composite magnetic head controlled by the erase recording/reproduction control means, i.e., the composite magnetic head in which an erase gap and a read/write gap are internally provided so as to be separated from each other in the longitudinal direction of a recording track.