WO2000030102A1 - Arrangement for reading information from a record carrier - Google Patents
Arrangement for reading information from a record carrier Download PDFInfo
- Publication number
- WO2000030102A1 WO2000030102A1 PCT/EP1999/008626 EP9908626W WO0030102A1 WO 2000030102 A1 WO2000030102 A1 WO 2000030102A1 EP 9908626 W EP9908626 W EP 9908626W WO 0030102 A1 WO0030102 A1 WO 0030102A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- signal
- read
- enor
- arrangement
- conection
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R33/00—Arrangements or instruments for measuring magnetic variables
- G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
- G01R33/06—Measuring direction or magnitude of magnetic fields or magnetic flux using galvano-magnetic devices
- G01R33/09—Magnetoresistive devices
-
- 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
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
-
- 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
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/22—Signal processing not specific to the method of recording or reproducing; Circuits therefor for reducing distortions
-
- 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
-
- 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
- G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
- G11B33/14—Reducing influence of physical parameters, e.g. temperature change, moisture, dust
-
- 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
- G11B5/09—Digital recording
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
HU0100532A HUP0100532A3 (en) | 1998-11-12 | 1999-11-08 | Arrangement for reading information from a record |
JP2000583030A JP2002530797A (en) | 1998-11-12 | 1999-11-08 | Information reading device from record carrier |
EP99972354A EP1048033A1 (en) | 1998-11-12 | 1999-11-08 | Arrangement for reading information from a record carrier |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98402802 | 1998-11-12 | ||
EP98402802.7 | 1998-11-12 | ||
EP99200165.1 | 1999-01-19 | ||
EP99200165 | 1999-01-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000030102A1 true WO2000030102A1 (en) | 2000-05-25 |
Family
ID=26151740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1999/008626 WO2000030102A1 (en) | 1998-11-12 | 1999-11-08 | Arrangement for reading information from a record carrier |
Country Status (7)
Country | Link |
---|---|
US (1) | US6381082B1 (en) |
EP (1) | EP1048033A1 (en) |
JP (1) | JP2002530797A (en) |
CN (1) | CN1186775C (en) |
HU (1) | HUP0100532A3 (en) |
MY (1) | MY126443A (en) |
WO (1) | WO2000030102A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6940670B2 (en) * | 1999-12-29 | 2005-09-06 | Koninklijke Philips Electronics N.V. | Method of reading magnetic information which is immunized against thermal asperities |
US7595948B1 (en) * | 2003-10-24 | 2009-09-29 | Marvell International Ltd. | Thermal asperity detection for perpendicular magnetic recording |
US7489750B1 (en) | 2004-01-15 | 2009-02-10 | Marvell International Ltd. | DC-control for post processor |
US7274523B2 (en) * | 2004-03-31 | 2007-09-25 | Stmicroelectronics, Inc. | Read head preamplifier with thermal asperity transient control |
US7969848B1 (en) * | 2007-03-21 | 2011-06-28 | Marvell International Ltd. | System and method of decoupling asymmetry from baseline compensation |
US7697223B2 (en) * | 2007-08-20 | 2010-04-13 | Hitachi Global Storage Technologies Netherlands B.V. | Monitoring a fly height of a magnetic transducer |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0439299A2 (en) * | 1990-01-23 | 1991-07-31 | International Business Machines Corporation | A circuit for suppressing additive disturbances in data channels |
EP0783168A2 (en) * | 1995-12-21 | 1997-07-09 | Cirrus Logic, Inc. | On-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk drive |
EP0785555A1 (en) * | 1996-01-22 | 1997-07-23 | Hewlett-Packard Company | Apparatus and method for thermal asperity detection and failure prediction in disk drive systems |
EP0785552A1 (en) * | 1996-01-02 | 1997-07-23 | International Business Machines Corporation | A method and apparatus for processing a signal obtained from a storage medium using a magnetoresistive element |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5418660A (en) * | 1991-12-09 | 1995-05-23 | Hitachi, Ltd. | Information processing apparatus for processing reproduction signal having nonlinear characteristics |
US5818656A (en) * | 1996-03-12 | 1998-10-06 | International Business Machines Corporation | Circuitry for correction of thermal transients in the analog signal from a magnetoresistive sensor |
US5737140A (en) * | 1996-06-07 | 1998-04-07 | Eastman Kodak Company | Simple pulse position modulation channel/decoder |
US6173019B1 (en) * | 1997-12-10 | 2001-01-09 | National Semiconductor Corporation | Control loop for data signal baseline correction |
EP0981817A2 (en) * | 1998-02-05 | 2000-03-01 | Koninklijke Philips Electronics N.V. | Arrangement for reading information from a magnetic record carrier |
US6137643A (en) * | 1998-10-06 | 2000-10-24 | International Business Machines Corporation | Thermal asperity detection with long magnet rejection for direct access storage device (DASD) |
-
1999
- 1999-11-08 WO PCT/EP1999/008626 patent/WO2000030102A1/en not_active Application Discontinuation
- 1999-11-08 JP JP2000583030A patent/JP2002530797A/en not_active Withdrawn
- 1999-11-08 CN CNB998039209A patent/CN1186775C/en not_active Expired - Lifetime
- 1999-11-08 EP EP99972354A patent/EP1048033A1/en not_active Withdrawn
- 1999-11-08 HU HU0100532A patent/HUP0100532A3/en unknown
- 1999-11-11 MY MYPI99004897A patent/MY126443A/en unknown
- 1999-11-12 US US09/439,201 patent/US6381082B1/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0439299A2 (en) * | 1990-01-23 | 1991-07-31 | International Business Machines Corporation | A circuit for suppressing additive disturbances in data channels |
EP0783168A2 (en) * | 1995-12-21 | 1997-07-09 | Cirrus Logic, Inc. | On-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk drive |
EP0785552A1 (en) * | 1996-01-02 | 1997-07-23 | International Business Machines Corporation | A method and apparatus for processing a signal obtained from a storage medium using a magnetoresistive element |
EP0785555A1 (en) * | 1996-01-22 | 1997-07-23 | Hewlett-Packard Company | Apparatus and method for thermal asperity detection and failure prediction in disk drive systems |
Also Published As
Publication number | Publication date |
---|---|
EP1048033A1 (en) | 2000-11-02 |
HUP0100532A3 (en) | 2003-04-28 |
CN1292923A (en) | 2001-04-25 |
HUP0100532A2 (en) | 2001-06-28 |
JP2002530797A (en) | 2002-09-17 |
MY126443A (en) | 2006-10-31 |
CN1186775C (en) | 2005-01-26 |
US6381082B1 (en) | 2002-04-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100443800B1 (en) | Method for thermal asperity detection and compensation in disk drive channels | |
US6693863B2 (en) | Asymmetry correcting circuit and information reproducing apparatus using the same | |
EP0830669B1 (en) | Mr head read signal preconditioning circuitry | |
US6597650B2 (en) | Nonlinearity compensation circuit and method, control circuit and method for nonlinearity compenstation circuit and recording and/or playback apparatus employing the same | |
EP0542540B1 (en) | Playback equalising circuit for a digital magnetic reproducing apparatus | |
EP0432953A2 (en) | A system for sensing and amplifying magnetic field signals | |
JPH08163181A (en) | Information reproduction circuit | |
JP2000011305A (en) | Thermal asperity detecting method for magnetic storage device and circuit therefor | |
US6255898B1 (en) | Noise eliminating circuit | |
US6381082B1 (en) | Arrangement for reading information form a record carrier | |
US6304396B1 (en) | Arrangement for reading information from a magnetic record carrier | |
Klaassen | Magnetic recording channel front-ends | |
US6920002B2 (en) | Reproducing amplifier and magnetic recording and reproducing apparatus employing the reproducing amplifier | |
GB2077077A (en) | Methods of and apparatus for recording a bi-level signal so as to minimise distortion when the signal is reproduced | |
US6995932B1 (en) | Thermal asperity compensation in perpendicular recording system | |
JP3075353B2 (en) | Information recording / reproducing apparatus and information recording / reproducing method | |
US20020122265A1 (en) | CMOS DC offset correction circuit with programmable high-pass transfer function | |
JP2610954B2 (en) | Equalizer characteristic correction method | |
JP4372856B2 (en) | Magnetic disk unit | |
JPH07142947A (en) | Agc circuit | |
JPH03120603A (en) | Reproduction device for digital signal | |
JPS61165861A (en) | Waveform equalizing circuit | |
JPH04310014A (en) | Signal waveform processor | |
KR19980073817A (en) | VCR auto tracking malfunction prevention circuit | |
JP2003101387A (en) | Equalizer circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 99803920.9 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CN HU JP SG |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1999972354 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1999972354 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1999972354 Country of ref document: EP |