METHOD AND APPARATUS DETECTING BASE LINE POPPING NOISE IN A READ HEAD AND STABILIZING THE MAGNETIC DOMAIN OF MERGED MAGNETORESISTIVE READ-WRITE HEADS USING DC WRITE CURRENT AND READ BIAS CURRENT FOR AN ASSEMBLED DISK DRIVE
August 22, 2022. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for recovering read errors due to thermal asperities in a disk drive having an MR head Thermal asperity detection with long magnet rejection for direct access storage device (DASD) Storage apparatus for reducing a read error caused by a thermal asperity of a magneto-resistive head Method and apparatus for detecting, logging and recovering from errors caused by multiple thermal asperities in a sector Method and system for detecting thermal asperity on discs used in a disc drive Readback signal detection and analysis in a magnetic data storage system Patent #: 6671111 InventorsApplicationNo. 10226404 filed on 08/22/2002US Classes:324/210, Magnetic information storage element testing324/212, Dynamic information element testing360/25, CHECKING RECORD CHARACTERISTICS OR MODIFYING RECORDING SIGNAL FOR CHARACTERISTIC COMPENSATION360/31MONITORING OR TESTING THE PROGRESS OF RECORDINGExaminersPrimary: Le, N.Assistant: Kinder, Darrell Attorney, Agent or FirmInternational ClassesG01R 3312G11B 2736 AbstractMethods and apparatus are disclosed determining the presence of base line popping noise for a read head inside an assembled disk drive, as well as, determining read bias conditions for operating the read head free of base line popping noise. These further include performance evaluation of the read head for read bias conditions free of base line popping noise. They also include repairing the read head using DC write current and read bias current within the assembled disk drive.Field of SearchMagnetic information storage element testingDynamic information element testing Of individual circuit component or element RECORDING COMBINED WITH METERING OR SENSING CHECKING RECORD CHARACTERISTICS OR MODIFYING RECORDING SIGNAL FOR CHARACTERISTIC COMPENSATION MONITORING OR TESTING THE PROGRESS OF RECORDING Head amplifier circuit | |
