KR101172805B1 - 디스크 파일 전치증폭기 주파수?응답 및 시간 지연 보상 - Google Patents

디스크 파일 전치증폭기 주파수?응답 및 시간 지연 보상 Download PDF

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Publication number
KR101172805B1
KR101172805B1 KR1020110071627A KR20110071627A KR101172805B1 KR 101172805 B1 KR101172805 B1 KR 101172805B1 KR 1020110071627 A KR1020110071627 A KR 1020110071627A KR 20110071627 A KR20110071627 A KR 20110071627A KR 101172805 B1 KR101172805 B1 KR 101172805B1
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South Korea
Prior art keywords
loopback
read
write
circuits
preamplifier
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Expired - Fee Related
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KR1020110071627A
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English (en)
Korean (ko)
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KR20120010162A (ko
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로스 윌슨
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엘에스아이 코포레이션
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • G11B21/12—Raising and lowering; Back-spacing or forward-spacing along track; Returning to starting position otherwise than during transducing operation
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height
    • G11B5/6029—Measurement using values derived from the data signal read from the disk
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
    • G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • G11B5/6011—Control of flying height
    • G11B5/607—Control of flying height using thermal means

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
KR1020110071627A 2010-07-19 2011-07-19 디스크 파일 전치증폭기 주파수?응답 및 시간 지연 보상 Expired - Fee Related KR101172805B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/838,601 US8169726B2 (en) 2010-07-19 2010-07-19 Disk file preamplifier frequency-response and time delay compensation
US12/838,601 2010-07-19

Publications (2)

Publication Number Publication Date
KR20120010162A KR20120010162A (ko) 2012-02-02
KR101172805B1 true KR101172805B1 (ko) 2012-08-10

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KR1020110071627A Expired - Fee Related KR101172805B1 (ko) 2010-07-19 2011-07-19 디스크 파일 전치증폭기 주파수?응답 및 시간 지연 보상

Country Status (6)

Country Link
US (1) US8169726B2 (enExample)
EP (1) EP2410528A1 (enExample)
JP (1) JP5059218B2 (enExample)
KR (1) KR101172805B1 (enExample)
CN (1) CN102339609B (enExample)
TW (1) TWI480865B (enExample)

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US9053747B1 (en) * 2013-01-29 2015-06-09 Western Digitial Technologies, Inc. Disk drive calibrating failure threshold based on noise power effect on failure detection metric
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US9275655B2 (en) 2013-06-11 2016-03-01 Avago Technologies General Ip (Singapore) Pte. Ltd. Timing error detector with diversity loop detector decision feedback
US10152999B2 (en) 2013-07-03 2018-12-11 Avago Technologies International Sales Pte. Limited Systems and methods for correlation based data alignment
US9129650B2 (en) 2013-07-25 2015-09-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Array-reader based magnetic recording systems with frequency division multiplexing
US9141176B1 (en) 2013-07-29 2015-09-22 Western Digital Technologies, Inc. Power management for data storage device
US9070379B2 (en) 2013-08-28 2015-06-30 Western Digital Technologies, Inc. Data migration for data storage device
US8922935B1 (en) 2013-08-28 2014-12-30 Seagate Technology Llc First and second read sensors coupled to a preamplifier via a common signal line
US9129646B2 (en) 2013-09-07 2015-09-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Array-reader based magnetic recording systems with mixed synchronization
US8917471B1 (en) 2013-10-29 2014-12-23 Western Digital Technologies, Inc. Power management for data storage device
US8976475B1 (en) 2013-11-12 2015-03-10 Lsi Corporation Systems and methods for large sector dynamic format insertion
US9224420B1 (en) 2014-10-02 2015-12-29 Avago Technologies General Ip (Singapore) Pte. Ltd. Syncmark detection failure recovery system
US10147453B1 (en) 2015-10-13 2018-12-04 Seagate Technology Llc Laser boost and duration optimization
US9779763B1 (en) * 2016-04-29 2017-10-03 Seagate Technology Llc Write signal adjustment
US11657846B1 (en) 2022-03-31 2023-05-23 Stmicroelectronics S.R.L. Automatic skew calibration circuit for pattern-dependent dynamic wave shaping for HDD preamplifier write
US20250372120A1 (en) * 2024-06-04 2025-12-04 Western Digital Technologies, Inc. High-speed high-voltage cmos write driver

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Also Published As

Publication number Publication date
TW201218195A (en) 2012-05-01
TWI480865B (zh) 2015-04-11
EP2410528A1 (en) 2012-01-25
KR20120010162A (ko) 2012-02-02
CN102339609B (zh) 2015-04-22
US8169726B2 (en) 2012-05-01
JP5059218B2 (ja) 2012-10-24
JP2012033255A (ja) 2012-02-16
US20120014011A1 (en) 2012-01-19
CN102339609A (zh) 2012-02-01

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