JP2012033255A5 - - Google Patents
Download PDFInfo
- Publication number
- JP2012033255A5 JP2012033255A5 JP2011156445A JP2011156445A JP2012033255A5 JP 2012033255 A5 JP2012033255 A5 JP 2012033255A5 JP 2011156445 A JP2011156445 A JP 2011156445A JP 2011156445 A JP2011156445 A JP 2011156445A JP 2012033255 A5 JP2012033255 A5 JP 2012033255A5
- Authority
- JP
- Japan
- Prior art keywords
- loopback
- cell
- write
- circuits
- channel
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
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 (3)
| Publication Number | Publication Date |
|---|---|
| JP2012033255A JP2012033255A (ja) | 2012-02-16 |
| JP2012033255A5 true JP2012033255A5 (enExample) | 2012-05-24 |
| JP5059218B2 JP5059218B2 (ja) | 2012-10-24 |
Family
ID=44508814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2011156445A Expired - Fee Related JP5059218B2 (ja) | 2010-07-19 | 2011-07-15 | ディスクファイルプレアンプ周波数応答及び時間遅延の補正 |
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)
| 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 |
Family Cites Families (45)
| 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 |
| US7398485B2 (en) * | 2006-04-11 | 2008-07-08 | International Business Machines Corporation | Yield optimization in router for systematic defects |
| 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 |
| US7616398B2 (en) * | 2007-11-09 | 2009-11-10 | Hitachi Global Storage Technologies Netherlands B.V. | Fly height adjustment device calibration |
| US8154818B2 (en) | 2007-12-14 | 2012-04-10 | Lsi Corporation | Systems and methods for adaptive CBD estimation in a storage device |
| CN101743592B (zh) * | 2007-12-14 | 2013-03-27 | Lsi公司 | 使用伺服数据控制飞行高度的系统和方法 |
| 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 |
| JP2009181660A (ja) * | 2008-01-31 | 2009-08-13 | Toshiba Corp | 磁気ディスク装置及び同装置におけるヘッド浮上高キャリブレーション方法 |
| CN101821808B (zh) | 2008-07-28 | 2014-03-19 | 艾格瑞系统有限公司 | 用于确定头组件与存储介质之间的飞行高度的系统和方法 |
-
2010
- 2010-07-19 US US12/838,601 patent/US8169726B2/en active Active
-
2011
- 2011-07-14 TW TW100124858A patent/TWI480865B/zh not_active IP Right Cessation
- 2011-07-15 JP JP2011156445A patent/JP5059218B2/ja not_active Expired - Fee Related
- 2011-07-19 CN CN201110202721.7A patent/CN102339609B/zh active Active
- 2011-07-19 EP EP20110174453 patent/EP2410528A1/en not_active Ceased
- 2011-07-19 KR KR1020110071627A patent/KR101172805B1/ko not_active Expired - Fee Related
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2012033255A5 (enExample) | ||
| TWI480865B (zh) | 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 | |
| US8792196B1 (en) | Disk drive estimating noise in a read signal based on an identified response at the input of an equalizer | |
| US7990648B1 (en) | Disk drive margining read channel using predictable disturbance samples generated as a function of a written pattern | |
| JPH06267008A (ja) | 磁気記録担体に情報信号を記録する装置 | |
| WO2004061845A1 (ja) | 信号処理装置及び信号処理方法 | |
| JP2000011305A (ja) | 磁気記憶装置のサーマルアスピリティ検出方法及びその回路 | |
| JP2009140585A (ja) | ヘッドic、リード回路、媒体記憶装置及びヘッドicのアンプゲイン調整方法 | |
| US7852584B2 (en) | Head IC, read circuit, and media storage device | |
| US9564162B1 (en) | Data storage device measuring resonant frequency of a shock sensor by applying differential excitation and measuring oscillation | |
| US8896950B1 (en) | Analog front end for proximity sensing of tunneling current | |
| US20110317302A1 (en) | Disk storage apparatus and method of measuring flying height of a head | |
| US7142380B2 (en) | Magnetic recording/reproducing apparatus and magnetic recording/reproducing method | |
| US10056098B1 (en) | Data storage device employing multi-mode sensing circuitry for multiple head sensor elements | |
| US10147455B1 (en) | Sensor circuit supporting multiple transducers with dedicated and shared terminals | |
| US7035030B2 (en) | Amplifier apparatus and magnetic recording and reproducing apparatus having the same | |
| JP2005285311A5 (enExample) | ||
| US9025421B1 (en) | Data storage device adjusting laser input power to compensate for temperature variations | |
| US9299371B1 (en) | Disk drive slider with sense amplifier for coupling to a preamp through a supply/bias line and a read signal line | |
| US20150302887A1 (en) | Cross-Talk Measurement In Array Reader Magnetic Recording System | |
| US6667613B1 (en) | Method of measuring resistance of magnetoresistive element | |
| US20090268332A1 (en) | Storage device and gain adjusting device | |
| JP4584698B2 (ja) | ディスク記録再生装置、ディスク記録回路及び再生回路 | |
| JP6629160B2 (ja) | 磁気記録再生装置および磁気記録再生装置の制御方法 | |
| JP2007335016A (ja) | ヘッドスラップ検出装置、記憶装置、ヘッドスラップ検出方法、およびヘッドスラップ検出プログラム |