SG65698A1 - Compensating circuit equalizer and magnetic recording/reproducing apparatus using the same - Google Patents

Compensating circuit equalizer and magnetic recording/reproducing apparatus using the same

Info

Publication number
SG65698A1
SG65698A1 SG1997004045A SG1997004045A SG65698A1 SG 65698 A1 SG65698 A1 SG 65698A1 SG 1997004045 A SG1997004045 A SG 1997004045A SG 1997004045 A SG1997004045 A SG 1997004045A SG 65698 A1 SG65698 A1 SG 65698A1
Authority
SG
Singapore
Prior art keywords
same
magnetic recording
reproducing apparatus
compensating circuit
circuit equalizer
Prior art date
Application number
SG1997004045A
Other languages
English (en)
Inventor
Yasutaka Nishida
Naoki Satoh
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of SG65698A1 publication Critical patent/SG65698A1/en

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
    • G11B5/02—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
    • 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
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof
    • 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
    • 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
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10305—Improvement or modification of read or write signals signal quality assessment
    • G11B20/10324—Improvement or modification of read or write signals signal quality assessment asymmetry of the recorded or reproduced waveform
    • 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
    • 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
    • G11B20/12—Formatting, e.g. arrangement of data block or words on the record carriers
    • G11B2020/1264—Formatting, e.g. arrangement of data block or words on the record carriers wherein the formatting concerns a specific kind of data
    • G11B2020/1265—Control data, system data or management information, i.e. data used to access or process user data
    • G11B2020/1275—Calibration data, e.g. specific training patterns for adjusting equalizer settings or other recording or playback parameters
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2508—Magnetic discs

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
SG1997004045A 1996-11-14 1997-11-13 Compensating circuit equalizer and magnetic recording/reproducing apparatus using the same SG65698A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8302699A JPH10143805A (ja) 1996-11-14 1996-11-14 補正回路、等化器及びこれを用いた磁気記録再生装置

Publications (1)

Publication Number Publication Date
SG65698A1 true SG65698A1 (en) 1999-06-22

Family

ID=17912133

Family Applications (1)

Application Number Title Priority Date Filing Date
SG1997004045A SG65698A1 (en) 1996-11-14 1997-11-13 Compensating circuit equalizer and magnetic recording/reproducing apparatus using the same

Country Status (4)

Country Link
US (1) US6141167A (ko)
JP (1) JPH10143805A (ko)
KR (1) KR19980042325A (ko)
SG (1) SG65698A1 (ko)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2363667B (en) * 1999-04-21 2003-06-18 Seagate Technology Llc Method and apparatus for correcting digital asymmetric read signals
US6396651B1 (en) * 1999-07-12 2002-05-28 Deanne S. Grover Gear-shifting compensation system and method for nonlinear input elements
TW466474B (en) * 1999-08-06 2001-12-01 Fujitsu Ltd Semiconductor device with decision feedback equalizer
US6678230B2 (en) * 2000-10-31 2004-01-13 Matsushita Electric Industrial Co., Ltd. Waveform equalizer for a reproduction signal obtained by reproducing marks and non-marks recorded on a recording medium
US6400518B1 (en) * 2000-11-01 2002-06-04 International Business Machines Corporation Magneto-resistive asymmetry correction circuit
TWI226045B (en) * 2003-08-08 2005-01-01 Ind Tech Res Inst Signal reconstructing apparatus of optical recording medium
US7161752B1 (en) 2003-11-05 2007-01-09 Marvell International Ltd. Asymmetric compensation circuit
US7511910B1 (en) 2004-10-27 2009-03-31 Marvell International Ltd. Asymmetry correction in read signal
US7298570B1 (en) * 2004-10-27 2007-11-20 Marvell International Ltd. Asymmetry correction in read signal
KR20080096745A (ko) * 2006-01-23 2008-11-03 로무 가부시키가이샤 부호화 장치, 복호 장치, 진폭 조정 장치, 기록 정보 판독장치, 신호 처리 장치 및 기억 시스템
US20130335844A1 (en) * 2012-06-15 2013-12-19 Lsi Corporation Systems and Methods for Hybrid MRA Compensation
US8908305B1 (en) 2014-07-29 2014-12-09 Lsi Corporation Systems and methods for slider head stability determination
JP2019086486A (ja) * 2017-11-10 2019-06-06 セイコーエプソン株式会社 処理装置、処理システム、物理量測定装置及び測定方法

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3052523B2 (ja) * 1992-01-27 2000-06-12 株式会社日立製作所 再生波形の非線形補正ａ／ｄ変換方法及び装置
US5418660A (en) * 1991-12-09 1995-05-23 Hitachi, Ltd. Information processing apparatus for processing reproduction signal having nonlinear characteristics
JP3112334B2 (ja) * 1992-03-19 2000-11-27 株式会社日立製作所 再生信号処理方法および回路
US5400189A (en) * 1992-03-19 1995-03-21 Hitachi, Ltd. Magnetic recording and reproducing apparatus, reproduction signal processing apparatus, and reproduction signal processing method
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
US6151177A (en) * 1994-12-09 2000-11-21 Seagate Technology, Inc. Apparatus for compensating for non-linear characteristics of magnetoresistive heads
JP3499034B2 (ja) * 1995-03-13 2004-02-23 富士通株式会社 非対称信号検出回路
JPH08255303A (ja) * 1995-03-20 1996-10-01 Fujitsu Ltd アナログ信号の波形整形回路
US5862007A (en) * 1996-04-18 1999-01-19 Samsung Electronics Co., Ltd. Method and apparatus for removing baseline shifts in a read signal using filters

Also Published As

Publication number Publication date
US6141167A (en) 2000-10-31
KR19980042325A (ko) 1998-08-17
JPH10143805A (ja) 1998-05-29

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