TWI480865B - 用於磁碟檔案前置放大器頻率響應及時間延遲補償之方法與設備 - Google Patents

用於磁碟檔案前置放大器頻率響應及時間延遲補償之方法與設備 Download PDF

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Publication number
TWI480865B
TWI480865B TW100124858A TW100124858A TWI480865B TW I480865 B TWI480865 B TW I480865B TW 100124858 A TW100124858 A TW 100124858A TW 100124858 A TW100124858 A TW 100124858A TW I480865 B TWI480865 B TW I480865B
Authority
TW
Taiwan
Prior art keywords
loopback
preamplifier
write
read
circuits
Prior art date
Application number
TW100124858A
Other languages
English (en)
Chinese (zh)
Other versions
TW201218195A (en
Inventor
Ross Wilson
Original Assignee
Lsi Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lsi Corp filed Critical Lsi Corp
Publication of TW201218195A publication Critical patent/TW201218195A/zh
Application granted granted Critical
Publication of TWI480865B publication Critical patent/TWI480865B/zh

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Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
TW100124858A 2010-07-19 2011-07-14 用於磁碟檔案前置放大器頻率響應及時間延遲補償之方法與設備 TWI480865B (zh)

Applications Claiming Priority (1)

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

Publications (2)

Publication Number Publication Date
TW201218195A TW201218195A (en) 2012-05-01
TWI480865B true TWI480865B (zh) 2015-04-11

Family

ID=44508814

Family Applications (1)

Application Number Title Priority Date Filing Date
TW100124858A TWI480865B (zh) 2010-07-19 2011-07-14 用於磁碟檔案前置放大器頻率響應及時間延遲補償之方法與設備

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)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8949701B2 (en) 2008-09-23 2015-02-03 Agere Systems Inc. Systems and methods for low latency media defect detection
US8390948B2 (en) * 2010-05-26 2013-03-05 Western Digital Technologies, Inc. Disk drive employing a preamp comprising read/write pass throughs for cascading integrated circuits
US8959284B1 (en) 2010-06-28 2015-02-17 Western Digital Technologies, Inc. Disk drive steering write data to write cache based on workload
US9058280B1 (en) 2010-08-13 2015-06-16 Western Digital Technologies, Inc. Hybrid drive migrating data from disk to non-volatile semiconductor memory based on accumulated access time
US9268499B1 (en) 2010-08-13 2016-02-23 Western Digital Technologies, Inc. Hybrid drive migrating high workload data from disk to non-volatile semiconductor memory
US8879188B1 (en) 2010-08-23 2014-11-04 Western Digital Technologies, Inc. Disk drive employing fly height calibration tracks to account for magnetic entropy and thermal decay
US8773802B1 (en) * 2010-08-24 2014-07-08 Western Digital Technologies, Inc. Disk drive resetting fly height reference generated from a degrading calibration track
US8565047B2 (en) 2011-04-28 2013-10-22 Lsi Corporation Systems and methods for data write loopback based timing control
US8649119B2 (en) * 2011-08-17 2014-02-11 HGST Netherlands B.V. Measuring variations in head-disk clearance in a hard disk drive
US8582226B2 (en) * 2012-03-15 2013-11-12 Seagate Technology Llc Write delay stabilization
US8681444B2 (en) 2012-06-07 2014-03-25 Lsi Corporation Multi-zone servo processor
US8625216B2 (en) 2012-06-07 2014-01-07 Lsi Corporation Servo zone detector
US8699159B1 (en) 2012-06-18 2014-04-15 Western Digital Technologies, Inc. Reducing effects of wide area track erasure in a disk drive
US8564897B1 (en) 2012-06-21 2013-10-22 Lsi Corporation Systems and methods for enhanced sync mark detection
US8773807B1 (en) 2012-07-24 2014-07-08 Western Digital Technologies, Inc. Disk drive calibrating fly height during startup by reading spacing pattern in servo sectors
US9076558B2 (en) * 2012-11-01 2015-07-07 Nanya Technology Corporation Memory test system and memory test method
US8625231B1 (en) 2012-11-08 2014-01-07 HGST Netherlands B.V. Adjusting VGA analog gain for misaligned servo sectors in a disk drive
US8959281B1 (en) 2012-11-09 2015-02-17 Western Digital Technologies, Inc. Data management for a storage device
US9019641B2 (en) 2012-12-13 2015-04-28 Lsi Corporation Systems and methods for adaptive threshold pattern detection
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
US9053217B2 (en) 2013-02-17 2015-06-09 Lsi Corporation Ratio-adjustable sync mark detection system
US9196297B2 (en) 2013-03-14 2015-11-24 Avago Technologies General Ip (Singapore) Pte. Ltd. Systems and methods for enhanced sync mark mis-detection protection
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

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007311773A (ja) * 2006-04-11 2007-11-29 Internatl Business Mach Corp <Ibm> システマティック欠陥に対応したルータにおける歩留まりの最適化
US20090122437A1 (en) * 2007-11-09 2009-05-14 Heng Gong Fly height adjustment device calibration
US20090154003A1 (en) * 2007-12-14 2009-06-18 Lsi Corporation Systems and Methods for Using an On-the-fly CBD Estimate to Adjust Fly-Height
US20090195912A1 (en) * 2008-01-31 2009-08-06 Kabushiki Kaisha Toshiba Disk drive that calibrates the power for setting the dynamic fly height of the head to a target value
TW200935409A (en) * 2007-12-14 2009-08-16 Lsi Corp Systems and methods for fly-height control using servo data
WO2010014078A1 (en) * 2008-07-28 2010-02-04 Agere Systems Inc. Systems and methods for variable compensated fly height measurement

Family Cites Families (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0227845B1 (en) 1985-11-19 1990-05-30 International Business Machines Corporation Method and apparatus for controlling the flying height of the head in a magnetic storage unit
US4777544A (en) 1986-08-15 1988-10-11 International Business Machine Corporation Method and apparatus for in-situ measurement of head/recording medium clearance
US5257146A (en) * 1990-06-28 1993-10-26 Vtc Inc. Magnetic head swing clamp and cross-talk eliminator for read/write preamplifier
US5168413A (en) 1990-11-30 1992-12-01 Ibm Corporation Transducer head flying height monitoring methods and apparatus for disk drive system
US5377058A (en) * 1992-12-31 1994-12-27 International Business Machines Corporation Fly height servo control of read/write head suspension
JPH06274805A (ja) * 1993-03-19 1994-09-30 Hitachi Ltd リード／ライト集積回路
US5545989A (en) 1995-01-19 1996-08-13 Conner Peripherals, Inc. Non-destructive in-situ landing velocity determination of magnetic rigid disk drives using back EMF from the spindle motor during shutdown
US5726821A (en) * 1995-12-22 1998-03-10 Western Digital Corporation Programmable preamplifier unit with serial interface for disk data storage device using MR heads
US5872676A (en) 1996-01-02 1999-02-16 International Business Machines Corporation Method and apparatus for positioning a dual element magnetoresistive head using thermal signals
US6104562A (en) * 1997-04-03 2000-08-15 International Business Machines Corporation Multiple element transducer for magnetic recording
US6008640A (en) 1997-04-28 1999-12-28 Seagate Technology, Inc. Detection and measurement of head disc interference using read back signal (without acoustic emission sensor or laser doppler vibrometer)
US6118602A (en) * 1997-10-31 2000-09-12 Stmicroelectronics, Inc. Preamplifier for a read/write head
US6226137B1 (en) * 1998-04-06 2001-05-01 Agere Systems Guardian Corp. Voltage bias, current sense preamplifier using no AC-coupling capacitors for a dual strip magnetoresistive reader
US6310740B1 (en) * 1999-06-29 2001-10-30 Western Digital Technologies, Inc Disk drive including N-current preamplifier for generating N-independently controlled write currents
US6415238B1 (en) 1999-07-16 2002-07-02 International Business Machines Corporation Adaptive compensation for arm electronics amplification circuitry of a disk drive system
US6424475B1 (en) * 2000-06-03 2002-07-23 Koninklijke Philips Electronics N.V. Magnetic head conductivity testing and form factor determination in a read/write device
US7087004B1 (en) * 2000-07-03 2006-08-08 Berke Michael N Self-administered back massage
US6975467B1 (en) 2000-10-11 2005-12-13 Maxtor Corporation Method and apparatus for high fly write detection in a disk drive
US6538833B2 (en) * 2001-01-23 2003-03-25 Texas Instruments Incorporated System and method for improving frequency response in a magneto-resistive preamplifier
US6671111B2 (en) * 2001-06-01 2003-12-30 International Business Machines Corporation Readback signal detection and analysis in a magnetic data storage system
US6700724B2 (en) 2001-08-22 2004-03-02 Seagate Technology Llc Contact detection and calibration for electrostatic fly height control in a disc drive
US7119990B2 (en) * 2002-05-30 2006-10-10 Komag, Inc. Storage device including a center tapped write transducer
US6906878B2 (en) * 2002-08-15 2005-06-14 Hitachi Global Storage Technologies Netherlands B.V. Method and system for implementing in situ low flyheight warning
US8111094B2 (en) * 2003-11-21 2012-02-07 Lsi Corporation Analog multiplexer circuits and methods
US7477467B1 (en) * 2003-11-25 2009-01-13 Marvell International Ltd. Preamp circuit including a loopback mode for data storage
JP4321437B2 (ja) * 2004-02-18 2009-08-26 株式会社日立製作所 磁気ディスクメモリ装置
JP4519579B2 (ja) * 2004-08-31 2010-08-04 株式会社東芝 ディスク記憶装置
CN100424754C (zh) * 2005-08-16 2008-10-08 英业达股份有限公司 硬盘磁头定位的测试方法
US7551384B1 (en) * 2005-10-07 2009-06-23 Seagate Technology Llc Systems and methods for calibrating a read/write channel of a hard disk drive
JP2007179717A (ja) 2005-12-01 2007-07-12 Fujitsu Ltd 接触検出装置、接触検出方法、ヘッドの製造方法
JP2007164889A (ja) 2005-12-13 2007-06-28 Fujitsu Ltd 情報記憶装置
US7180692B1 (en) 2005-12-27 2007-02-20 Hitachi Global Storage Technologies Netherlands B.V. System and method for calibrating and controlling a fly-height actuator in a magnetic recording disk drive
US7558015B2 (en) 2006-03-29 2009-07-07 Maxtor Corporation Actuation efficiency based contact detection
US7633696B2 (en) 2006-03-29 2009-12-15 Seagate Technology Llc Fly height calibration for read/write heads
JP2007272978A (ja) * 2006-03-30 2007-10-18 Fujitsu Ltd 磁気記憶装置におけるヘッド浮上量測定装置
US7468856B2 (en) * 2006-05-18 2008-12-23 Seagate Technology Llc Estimation and control of head fly height
US7595951B2 (en) * 2006-06-02 2009-09-29 Agere Systems Inc. Head-specific standby modes for disk drive preamplifiers and the like
JP2008103060A (ja) * 2006-09-20 2008-05-01 Fujitsu Ltd ヘッドｉｃ、リード回路及び媒体記憶装置
JP4780625B2 (ja) * 2008-01-30 2011-09-28 東芝ストレージデバイス株式会社 パターンドメディア用ライト信号位相調整装置及び方法並びに磁気ディスク装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007311773A (ja) * 2006-04-11 2007-11-29 Internatl Business Mach Corp <Ibm> システマティック欠陥に対応したルータにおける歩留まりの最適化
US20090122437A1 (en) * 2007-11-09 2009-05-14 Heng Gong Fly height adjustment device calibration
US20090154003A1 (en) * 2007-12-14 2009-06-18 Lsi Corporation Systems and Methods for Using an On-the-fly CBD Estimate to Adjust Fly-Height
TW200935409A (en) * 2007-12-14 2009-08-16 Lsi Corp Systems and methods for fly-height control using servo data
US20090195912A1 (en) * 2008-01-31 2009-08-06 Kabushiki Kaisha Toshiba Disk drive that calibrates the power for setting the dynamic fly height of the head to a target value
WO2010014078A1 (en) * 2008-07-28 2010-02-04 Agere Systems Inc. Systems and methods for variable compensated fly height measurement

Also Published As

Publication number Publication date
TW201218195A (en) 2012-05-01
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
KR101172805B1 (ko) 2012-08-10
CN102339609A (zh) 2012-02-01

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