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:
Apr. 28, 1992
Filed:
Dec. 04, 1989
Richard J Pederson, Boulder, CO (US);
Maxtor Corporation, Longmont, CO (US);
Abstract
A technique is provided for detecting defects in data apparatus, such as magnetic storage apparatus, wherein recovered data pulses are expected during periodic window intervals. Data pulses which may be phase shifted relative to predetermined data pulse times of occurrence are recovered, such as by playing back such pulses from a magnetic storage medium, for example, a hard disk drive. The recovered data pulses are selectively delayed, and the delayed and undelayed data pulses are multiplexed into a stream. The occurrences of such data pulses in the stream within the aforementioned window intervals are detected to provide indications of defects. A defect is indicated if a pulse in the stream does not occur within the window interval.