CN101785061A - 在垂直磁性读通道中的前馈直流恢复 - Google Patents
在垂直磁性读通道中的前馈直流恢复 Download PDFInfo
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- CN101785061A CN101785061A CN200880021769A CN200880021769A CN101785061A CN 101785061 A CN101785061 A CN 101785061A CN 200880021769 A CN200880021769 A CN 200880021769A CN 200880021769 A CN200880021769 A CN 200880021769A CN 101785061 A CN101785061 A CN 101785061A
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- 238000001514 detection method Methods 0.000 claims abstract description 61
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims description 35
- 230000001360 synchronised effect Effects 0.000 claims description 5
- 230000004044 response Effects 0.000 description 11
- 238000011084 recovery Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 2
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- 238000012937 correction Methods 0.000 description 2
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- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000004590 computer program Methods 0.000 description 1
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- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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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
- G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
- G11B20/10203—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter baseline correction
Abstract
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Claims (20)
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/770,243 US7602567B2 (en) | 2007-06-28 | 2007-06-28 | Feed-forward DC restoration in a perpendicular magnetic read channel |
US11/770,243 | 2007-06-28 | ||
PCT/US2008/002801 WO2009005545A1 (en) | 2007-06-28 | 2008-03-03 | Feed-forward dc restoration in a perpendicular magnetic read channel |
Publications (2)
Publication Number | Publication Date |
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CN101785061A true CN101785061A (zh) | 2010-07-21 |
CN101785061B CN101785061B (zh) | 2012-05-30 |
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2008800217694A Active CN101785061B (zh) | 2007-06-28 | 2008-03-03 | 在垂直磁性读通道中的前馈直流恢复 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7602567B2 (zh) |
EP (1) | EP2158590B1 (zh) |
JP (1) | JP5038495B2 (zh) |
KR (1) | KR101243936B1 (zh) |
CN (1) | CN101785061B (zh) |
TW (1) | TWI387864B (zh) |
WO (1) | WO2009005545A1 (zh) |
Cited By (1)
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CN102893334A (zh) * | 2010-05-10 | 2013-01-23 | 马维尔国际贸易有限公司 | 用于偏移和增益纠正的方法和装置 |
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US8154972B2 (en) * | 2009-06-24 | 2012-04-10 | Lsi Corporation | Systems and methods for hard disk drive data storage including reduced latency loop recovery |
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US7990648B1 (en) * | 2009-12-09 | 2011-08-02 | Western Digital Technologies, Inc. | Disk drive margining read channel using predictable disturbance samples generated as a function of a written pattern |
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US11716097B2 (en) | 2021-12-29 | 2023-08-01 | Western Digital Technologies, Inc. | Signal correction using soft information in a data channel |
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JP3977580B2 (ja) | 2000-09-21 | 2007-09-19 | 株式会社東芝 | 磁気ディスク装置 |
SG115437A1 (en) * | 2000-12-27 | 2005-10-28 | Toshiba Kk | Disk drive including preamplifier for perpendicular magnetic recording system |
JP2003022625A (ja) * | 2001-07-10 | 2003-01-24 | Hitachi Ltd | 磁気記録用プリアンブルパターン及び磁気記録装置 |
US7167327B2 (en) * | 2003-01-06 | 2007-01-23 | Agere Systems Inc. | Integrated circuit and method for remodulating bits and hard disk drive incorporating the same |
US7116504B1 (en) | 2003-03-25 | 2006-10-03 | Marvell International Ltd. | DC-offset compensation loops for magnetic recording system |
US7308057B1 (en) | 2003-06-05 | 2007-12-11 | Maxtor Corporation | Baseline wander compensation for perpendicular recording |
US7330320B1 (en) * | 2003-06-16 | 2008-02-12 | Marvell International Ltd. | Method and apparatus to limit DC-level in coded data |
JP4268108B2 (ja) * | 2004-09-13 | 2009-05-27 | 富士通株式会社 | 磁気記録再生装置および磁気記録再生方法 |
JP2006277849A (ja) * | 2005-03-30 | 2006-10-12 | Fujitsu Ltd | 磁気ディスク装置、磁気記録再生方法およびリードリトライ方法 |
JP4406395B2 (ja) * | 2005-11-29 | 2010-01-27 | 株式会社東芝 | ディスク記憶装置及びヘッドアンプ装置 |
JP2008282506A (ja) * | 2007-05-14 | 2008-11-20 | Hitachi Ltd | 再生信号処理回路、再生信号処理方法及び光ディスクドライブ |
-
2007
- 2007-06-28 US US11/770,243 patent/US7602567B2/en not_active Expired - Fee Related
- 2007-11-26 TW TW096144727A patent/TWI387864B/zh not_active IP Right Cessation
-
2008
- 2008-03-03 CN CN2008800217694A patent/CN101785061B/zh active Active
- 2008-03-03 EP EP08726358A patent/EP2158590B1/en active Active
- 2008-03-03 KR KR1020107001865A patent/KR101243936B1/ko not_active IP Right Cessation
- 2008-03-03 WO PCT/US2008/002801 patent/WO2009005545A1/en active Application Filing
- 2008-03-03 JP JP2010514747A patent/JP5038495B2/ja not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102893334A (zh) * | 2010-05-10 | 2013-01-23 | 马维尔国际贸易有限公司 | 用于偏移和增益纠正的方法和装置 |
US9001631B2 (en) | 2010-05-10 | 2015-04-07 | Marvell World Trade Ltd. | Method and apparatus for offset and gain correction |
CN102893334B (zh) * | 2010-05-10 | 2016-04-13 | 马维尔国际贸易有限公司 | 用于偏移和增益纠正的方法和装置 |
Also Published As
Publication number | Publication date |
---|---|
TWI387864B (zh) | 2013-03-01 |
TW200900893A (en) | 2009-01-01 |
US20090002862A1 (en) | 2009-01-01 |
CN101785061B (zh) | 2012-05-30 |
JP2010531524A (ja) | 2010-09-24 |
EP2158590B1 (en) | 2012-09-05 |
KR101243936B1 (ko) | 2013-03-18 |
KR20100051627A (ko) | 2010-05-17 |
US7602567B2 (en) | 2009-10-13 |
JP5038495B2 (ja) | 2012-10-03 |
WO2009005545A1 (en) | 2009-01-08 |
EP2158590A1 (en) | 2010-03-03 |
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