SG42837A1 - Individual MR transducer head/disk/channel adaptive bias current system - Google Patents
Individual MR transducer head/disk/channel adaptive bias current systemInfo
- Publication number
- SG42837A1 SG42837A1 SG1996000011A SG1996000011A SG42837A1 SG 42837 A1 SG42837 A1 SG 42837A1 SG 1996000011 A SG1996000011 A SG 1996000011A SG 1996000011 A SG1996000011 A SG 1996000011A SG 42837 A1 SG42837 A1 SG 42837A1
- Authority
- SG
- Singapore
- Prior art keywords
- disk
- individual
- bias current
- current system
- transducer head
- Prior art date
Links
Classifications
-
- 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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
- G11B19/02—Control of operating function, e.g. switching from recording to reproducing
-
- 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
- G11B5/012—Recording on, or reproducing or erasing from, magnetic disks
-
- 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
- G11B5/02—Recording, reproducing, or erasing methods; Read, write or erase circuits therefor
- G11B5/027—Analogue recording
- G11B5/035—Equalising
-
- 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
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0005—Arrangements, methods or circuits
- G11B2005/0008—Magnetic conditionning of heads, e.g. biasing
-
- 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
- G11B2005/0002—Special dispositions or recording techniques
- G11B2005/0005—Arrangements, methods or circuits
- G11B2005/001—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure
- G11B2005/0013—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation
- G11B2005/0016—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers
- G11B2005/0018—Controlling recording characteristics of record carriers or transducing characteristics of transducers by means not being part of their structure of transducers, e.g. linearisation, equalisation of magnetoresistive transducers by current biasing control or regulation
-
- 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
- G11B5/465—Arrangements for demagnetisation of heads
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Recording Or Reproducing By Magnetic Means (AREA)
- Digital Magnetic Recording (AREA)
- Magnetic Heads (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/168,630 US5412518A (en) | 1993-12-16 | 1993-12-16 | Individual MR transducer head/disk/channel adaptive bias current system |
Publications (1)
Publication Number | Publication Date |
---|---|
SG42837A1 true SG42837A1 (en) | 1997-10-17 |
Family
ID=22612297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SG1996000011A SG42837A1 (en) | 1993-12-16 | 1994-11-15 | Individual MR transducer head/disk/channel adaptive bias current system |
Country Status (10)
Country | Link |
---|---|
US (1) | US5412518A (zh) |
EP (1) | EP0658879B1 (zh) |
JP (1) | JP2708383B2 (zh) |
KR (1) | KR0167809B1 (zh) |
CN (1) | CN1070629C (zh) |
BR (1) | BR9405114A (zh) |
DE (1) | DE69428864T2 (zh) |
MY (1) | MY112261A (zh) |
SG (1) | SG42837A1 (zh) |
TW (1) | TW252200B (zh) |
Families Citing this family (56)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3216943B2 (ja) * | 1993-09-13 | 2001-10-09 | 株式会社日立製作所 | 磁気記録再生装置 |
JP3135447B2 (ja) * | 1994-01-27 | 2001-02-13 | 富士通株式会社 | 磁気ディスクドライブの制御方法及びその装置 |
US5576908A (en) * | 1994-04-01 | 1996-11-19 | International Business Machines Corporation | Actuator and file level initialization of magnetoresistive transducers |
US5631527A (en) * | 1994-09-06 | 1997-05-20 | Sgs-Thomson Microelectronics, Inc. | Voice coil motor feedback control circuit |
US5523898A (en) * | 1994-11-08 | 1996-06-04 | International Business Machines Corporation | Partial MR sensor bias current during write |
US5552950A (en) * | 1994-11-30 | 1996-09-03 | International Business Machines Corporation | Direct access storage device with magneto-resistive transducing head apparatus and a common read return signal line |
US6151177A (en) * | 1994-12-09 | 2000-11-21 | Seagate Technology, Inc. | Apparatus for compensating for non-linear characteristics of magnetoresistive heads |
JP3072014B2 (ja) * | 1995-02-10 | 2000-07-31 | 富士通株式会社 | 記憶装置 |
JP2001518223A (ja) * | 1995-06-06 | 2001-10-09 | マクスター コーポレイション | Mr記録ヘッドのプログラマブルバイアス電流によるエラー訂正 |
DE19535089A1 (de) * | 1995-09-21 | 1997-03-27 | Thomson Brandt Gmbh | Verfahren zur Aufzeichnung von digitalen Signalen auf einem Magnetband in Multilängsspuren sowie Magnetbandaufzeichnungsgerät zur Durchführung des Verfahrens |
JP2986083B2 (ja) * | 1995-09-21 | 1999-12-06 | インターナショナル・ビジネス・マシーンズ・コーポレイション | デイスク装置およびデイスク装置における読み取り不良回復方法 |
US6057972A (en) * | 1995-11-03 | 2000-05-02 | International Business Machines Corporation | Current source for a magnetoresistive head with variability and selectable slew rate |
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 |
US5969896A (en) * | 1996-01-08 | 1999-10-19 | Hitachi, Ltd. | Magnetic recording/reproducing device with a function of correcting waveform of magnetoresistive-effect head |
US5774291A (en) * | 1996-03-28 | 1998-06-30 | International Business Machines Corporation | Voltage measurement circuit for a magnetoresistive head installed in a disk enclosure |
US5764446A (en) * | 1996-05-01 | 1998-06-09 | International Business Machines Corporation | Magnetic head having an air bearing surface with short-resistant leads |
US5757566A (en) * | 1996-09-10 | 1998-05-26 | Vtc Inc. | Direct AC-coupled amplifier with improved common mode rejection for MR heads |
US5978163A (en) * | 1996-09-23 | 1999-11-02 | International Business Machines Corporation | Circuit and method for optimizing bias supply in a magnetoresistive head based on temperature |
US5790334A (en) * | 1996-10-02 | 1998-08-04 | International Business Machines Corporation | Circuit and method for optimizing bias supply in a magnetoresistive head based on the thermal properties of the MR head itself |
US5930062A (en) * | 1996-10-03 | 1999-07-27 | Hewlett-Packard Company | Actively stabilized magnetoresistive head |
US6043943A (en) * | 1996-12-31 | 2000-03-28 | Stmicroelectronics, Inc. | Asymmetry correction for a read head |
JP3246374B2 (ja) * | 1997-01-13 | 2002-01-15 | 株式会社日立製作所 | 磁気抵抗効果型素子を用いた磁気記録装置 |
US5880899A (en) * | 1997-02-25 | 1999-03-09 | International Business Machines Corporation | Removal of raised irregularities on a data storage disk with controlled abrasion by a magnetoresistive head |
US6104562A (en) * | 1997-04-03 | 2000-08-15 | International Business Machines Corporation | Multiple element transducer for magnetic recording |
WO1998057323A1 (en) * | 1997-06-13 | 1998-12-17 | Seagate Technology, Inc. | Temperature dependent disc drive parametric configuration |
KR100562146B1 (ko) * | 1998-03-04 | 2006-05-25 | 삼성전자주식회사 | 엠.알-바이어스 전류 최적화방법 |
US6356404B1 (en) | 1998-06-05 | 2002-03-12 | Seagate Technology Llc | Simultaneously biasing multiple magneto-resistive read elements |
US6324029B1 (en) | 1998-06-29 | 2001-11-27 | International Business Machines Corporation | Method and system for GMR sensor reset pulse application |
WO2000004550A2 (en) * | 1998-07-16 | 2000-01-27 | Seagate Technology, Inc. | Method and apparatus for biasing a magnetoresistive head with constant power dissipation |
DE69935094T2 (de) * | 1998-07-17 | 2007-11-22 | Koninklijke Philips Electronics N.V. | Magnetische Informationslesevorrichtung |
US6385000B1 (en) * | 1998-08-21 | 2002-05-07 | International Business Machines Corporation | System and method for extending the operating life of a magnetoresistive transducer provided in a disk drive system |
JP3953217B2 (ja) * | 1998-12-25 | 2007-08-08 | 富士通株式会社 | Mrヘッドを備えた磁気再生装置 |
JP3532112B2 (ja) * | 1999-02-15 | 2004-05-31 | 松下電器産業株式会社 | 固定磁気記録装置 |
US6271977B1 (en) | 1999-02-16 | 2001-08-07 | International Business Machines Corporation | Multi-state preamplifier for disk drives |
JP2001101607A (ja) * | 1999-04-13 | 2001-04-13 | Texas Instr Inc <Ti> | 情報記録再生装置およびディスク駆動機構 |
US6429991B1 (en) | 1999-04-15 | 2002-08-06 | Mitsubishi Electric And Electronics U.S.A., Inc. | Reducing bias current settling time in magneto-resistive head pre-amplifiers |
US6512647B1 (en) * | 1999-08-27 | 2003-01-28 | Seagate Technology Llc | Method and apparatus for adaptive tuning bias current for magnetoresistive head |
US6574061B1 (en) | 1999-08-27 | 2003-06-03 | Seagate Technology Llc | Method and apparatus for run-time temperature compensation of giant magnetoresistive head bias current |
US6320713B1 (en) * | 1999-09-14 | 2001-11-20 | International Business Machines Corporation | Ratio method for measurement of MR read head resistance |
US6717761B2 (en) | 2000-04-26 | 2004-04-06 | Hitachi, Ltd. | Recording/reproducing apparatus |
US6693756B2 (en) | 2000-09-28 | 2004-02-17 | Seagate Technology Llc | Reducing read element power dissipation levels in a disc drive |
KR100438770B1 (ko) * | 2001-05-28 | 2004-07-05 | 삼성전자주식회사 | 데이터 저장 시스템의 설계 파라미터 최적화 방법 및최적화된 설계 파라미터 적용 방법 |
US6979044B2 (en) * | 2002-03-27 | 2005-12-27 | Stephen Edward Tyrer | Golf cart rearwardly extending canopy cover |
US6764006B1 (en) | 2002-07-30 | 2004-07-20 | Storage Technology Corporation | Apparatus and/or method to reduce bias current for MR reader during read only operation |
US7139141B1 (en) | 2003-05-12 | 2006-11-21 | Storage Technology Corporation | System and method for read/write optimization |
US6903889B2 (en) * | 2003-06-11 | 2005-06-07 | Seagate Technology | Method and apparatus for tuning a magnetoresistive bias parameter in a data storage system |
US7196881B2 (en) * | 2004-03-08 | 2007-03-27 | Hitachi Global Storage Technologies Netherlands B.V. | Adaptive domain stabilization for magnetic recording read sensors |
US7522365B1 (en) * | 2004-11-03 | 2009-04-21 | Maxtor Corporation | Magnetic storage systems and methods allowing for recovery of data blocks written off-track with non-constant offsets |
KR100699878B1 (ko) * | 2005-11-18 | 2007-03-28 | 삼성전자주식회사 | 하드디스크 드라이브의 기록 전류 최적화 방법, 이에적합한 기록 매체 그리고 이에 적합한 장치 |
US7804657B1 (en) | 2007-06-11 | 2010-09-28 | Western Digital Technologies, Inc. | Setting an operating bias current for a magnetoresistive head using ratio of target voltage and measured voltage |
US7872824B1 (en) | 2007-06-11 | 2011-01-18 | Western Digital (Fremont), Llc | Setting an operating bias current for a magnetoresistive head by computing a target operating voltage |
US7760458B1 (en) | 2008-08-12 | 2010-07-20 | Western Digital Technologies, Inc. | Disk drive adjusting head bias during servo synchronization to compensate for over/under sensitivity |
US8279549B2 (en) * | 2009-04-29 | 2012-10-02 | Texas Instruments Incorporated | System and method for setting bias for MR head |
WO2015009718A1 (en) * | 2013-07-16 | 2015-01-22 | Marvell World Trade Ltd. | Systems and methods for calibrating read and write operations in two dimensional magnetic recording |
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 |
US10283149B2 (en) | 2017-04-14 | 2019-05-07 | Western Digital Technologies, Inc. | Energy-assisted magnetic recording device capable of predicting the usable life of magnetic head |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1979000715A1 (en) * | 1978-03-01 | 1979-10-04 | Pioneer Electronic Corp | Magnetic recorder/reproducer |
DE2938937C2 (de) * | 1978-09-27 | 1985-12-12 | Hitachi, Ltd., Tokio/Tokyo | Einstellvorrichtung und Verfahren für ein Magnetband-Aufzeichungs- und Wiedergabegerät |
JPS606007B2 (ja) * | 1978-11-14 | 1985-02-15 | パイオニア株式会社 | 磁気録音再生機の最適録音特性検出方法 |
JPS5724004A (en) * | 1980-07-17 | 1982-02-08 | Olympus Optical Co Ltd | Bias control device |
JPS58114308A (ja) * | 1981-12-26 | 1983-07-07 | Toshiba Corp | テ−プレコ−ダ |
US4611253A (en) * | 1983-06-28 | 1986-09-09 | Pioneer Electronic Corporation | Magnetic recording and reproducing device |
JPS61148607A (ja) * | 1984-12-20 | 1986-07-07 | Matsushita Electric Ind Co Ltd | マルチトラツク磁気信号再生装置 |
US4706138A (en) * | 1986-04-14 | 1987-11-10 | International Business Machines Corporation | Amplification of signals produced by a magnetic sensor |
JP2510541B2 (ja) * | 1986-12-01 | 1996-06-26 | 株式会社日立製作所 | 磁気デイスク用磁気抵抗効果型磁気ヘツド |
US5095392A (en) * | 1988-01-27 | 1992-03-10 | Matsushita Electric Industrial Co., Ltd. | Digital signal magnetic recording/reproducing apparatus using multi-level QAM modulation and maximum likelihood decoding |
US5119243A (en) * | 1988-12-19 | 1992-06-02 | Matsushita Electric Industrial Co., Ltd. | Digital signal magnetic recording/reproducing apparatus |
JPH05182113A (ja) * | 1991-12-26 | 1993-07-23 | Matsushita Electric Ind Co Ltd | 磁気記録再生装置 |
US5283521A (en) * | 1992-05-26 | 1994-02-01 | International Business Machines Corporation | Method and system for adaptive digital linearization of an output signal from a magnetoresistive head |
US5270882A (en) * | 1992-07-15 | 1993-12-14 | International Business Machines Corporation | Low-voltage, low-power amplifier for magnetoresistive sensor |
-
1993
- 1993-12-16 US US08/168,630 patent/US5412518A/en not_active Expired - Lifetime
-
1994
- 1994-11-15 EP EP94480137A patent/EP0658879B1/en not_active Expired - Lifetime
- 1994-11-15 DE DE69428864T patent/DE69428864T2/de not_active Expired - Lifetime
- 1994-11-15 SG SG1996000011A patent/SG42837A1/en unknown
- 1994-11-16 JP JP6281744A patent/JP2708383B2/ja not_active Expired - Fee Related
- 1994-11-23 MY MYPI94003123A patent/MY112261A/en unknown
- 1994-11-29 CN CN94118867A patent/CN1070629C/zh not_active Expired - Fee Related
- 1994-12-07 KR KR1019940033143A patent/KR0167809B1/ko not_active IP Right Cessation
- 1994-12-15 BR BR9405114A patent/BR9405114A/pt not_active Application Discontinuation
- 1994-12-22 TW TW083112047A patent/TW252200B/zh active
Also Published As
Publication number | Publication date |
---|---|
KR950020411A (ko) | 1995-07-24 |
DE69428864D1 (de) | 2001-12-06 |
CN1070629C (zh) | 2001-09-05 |
MY112261A (en) | 2001-05-31 |
EP0658879B1 (en) | 2001-10-31 |
EP0658879A3 (en) | 1995-11-02 |
TW252200B (zh) | 1995-07-21 |
US5412518A (en) | 1995-05-02 |
CN1122037A (zh) | 1996-05-08 |
JP2708383B2 (ja) | 1998-02-04 |
JPH07201005A (ja) | 1995-08-04 |
EP0658879A2 (en) | 1995-06-21 |
BR9405114A (pt) | 1995-08-08 |
KR0167809B1 (ko) | 1999-03-20 |
DE69428864T2 (de) | 2002-05-02 |
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