CN102339609B - 磁盘文件前置放大器频率响应和延时补偿 - Google Patents
磁盘文件前置放大器频率响应和延时补偿 Download PDFInfo
- Publication number
- CN102339609B CN102339609B CN201110202721.7A CN201110202721A CN102339609B CN 102339609 B CN102339609 B CN 102339609B CN 201110202721 A CN201110202721 A CN 201110202721A CN 102339609 B CN102339609 B CN 102339609B
- Authority
- CN
- China
- Prior art keywords
- loopback
- circuit
- write
- reader
- 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.)
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Links
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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)
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 |
|---|---|
| CN102339609A CN102339609A (zh) | 2012-02-01 |
| CN102339609B true CN102339609B (zh) | 2015-04-22 |
Family
ID=44508814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110202721.7A Active CN102339609B (zh) | 2010-07-19 | 2011-07-19 | 磁盘文件前置放大器频率响应和延时补偿 |
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 |
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| 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 |
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| CN1917042A (zh) * | 2005-08-16 | 2007-02-21 | 英业达股份有限公司 | 硬盘磁头定位的测试方法 |
| US7411753B2 (en) * | 2004-08-31 | 2008-08-12 | Kabushiki Kaisha Toshiba | Method and apparatus for magnetization test of write head in a disk drive |
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| 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 |
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| 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
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7411753B2 (en) * | 2004-08-31 | 2008-08-12 | Kabushiki Kaisha Toshiba | Method and apparatus for magnetization test of write head in a disk drive |
| CN1917042A (zh) * | 2005-08-16 | 2007-02-21 | 英业达股份有限公司 | 硬盘磁头定位的测试方法 |
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 |
| 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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