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:
Oct. 15, 1996
Filed:
Oct. 26, 1994
Hideki Ohmori, Kawasaki, JP;
Shuichi Hashimoto, Kawasaki, JP;
Fujitsu Limited, , JP;
Abstract
A processor of a drive unit positions a head to a designated cylinder position of a disk medium on the basis of a command notified from an upper controller through a data bus and amplifies a read signal by a read amplifier and, after that, transmits the amplified read signal to the upper controller through a read signal line. A data disconnecting circuit is provided for the data bus from an upper apparatus to the processor. The data disconnecting circuit switches the data bus to a disconnection state by a control signal which is generated from the upper apparatus during the data reading operation. When the control signal is interrupted by the end of the data reading operation, the data bus is returned to the connection state.