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:
Jan. 23, 2001
Filed:
Oct. 16, 1997
Storage apparatus for reducing a read error caused by a thermal asperity of a magneto-resistive head
Teruyuki Narita, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
For a read demodulating unit for demodulating read data and servo data which is used for head positioning from a reproduction waveform signal of a magneto-resistive head, a thermal asperity fault detecting unit for setting a predetermined threshold for the reproduction waveform signal and for generating a fault signal when the reproduction waveform signal exceeds the threshold is provided. When a thermal asperity fault is detected by the thermal asperity fault detecting unit, an increase in cut-off frequency of a high pass filter, an automatic gain control lock by an automatic gain control holding circuit, and a phase lock loop lock by a phase lock loop holding circuit are executed in an error avoiding unit.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile