DE69524525D1 - Optimierung der Schreibprekompensation bei einem PRML-Kanal - Google Patents
Optimierung der Schreibprekompensation bei einem PRML-KanalInfo
- Publication number
- DE69524525D1 DE69524525D1 DE69524525T DE69524525T DE69524525D1 DE 69524525 D1 DE69524525 D1 DE 69524525D1 DE 69524525 T DE69524525 T DE 69524525T DE 69524525 T DE69524525 T DE 69524525T DE 69524525 D1 DE69524525 D1 DE 69524525D1
- Authority
- DE
- Germany
- Prior art keywords
- optimization
- compensation
- write pre
- prml channel
- prml
- 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.)
- Expired - Fee Related
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
-
- 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
- G11B20/10194—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using predistortion during writing
-
- 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
- G11B20/10055—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter using partial response filtering when writing the signal to the medium or reading it therefrom
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/36—Monitoring, i.e. supervising the progress of recording or reproducing
-
- 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
- G11B20/1217—Formatting, e.g. arrangement of data block or words on the record carriers on discs
- G11B20/1258—Formatting, e.g. arrangement of data block or words on the record carriers on discs where blocks are arranged within multiple radial zones, e.g. Zone Bit Recording or Constant Density Recording discs, MCAV discs, MCLV discs
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/317,902 US5493454A (en) | 1994-10-04 | 1994-10-04 | Write precompensation optimization in a PRML channel using a selected PRML signal level |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69524525D1 true DE69524525D1 (de) | 2002-01-24 |
DE69524525T2 DE69524525T2 (de) | 2002-05-23 |
Family
ID=23235752
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69524525T Expired - Fee Related DE69524525T2 (de) | 1994-10-04 | 1995-09-05 | Optimierung der Schreibprekompensation bei einem PRML-Kanal |
Country Status (5)
Country | Link |
---|---|
US (2) | US5493454A (de) |
EP (1) | EP0706173B1 (de) |
JP (1) | JPH08115503A (de) |
KR (1) | KR960015387A (de) |
DE (1) | DE69524525T2 (de) |
Families Citing this family (63)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5754353A (en) * | 1993-07-01 | 1998-05-19 | Cirrus Logic, Inc. | Channel quality circuit in a sampled amplitude read channel |
US5761212A (en) * | 1993-07-01 | 1998-06-02 | Cirrus Logic, Inc. | Channel quality |
KR950034207A (ko) * | 1994-04-05 | 1995-12-26 | 케네스 리 | Prml 디지탈 자기 데이타 저장 채널에서 섹터 시작에서 isi에 의해 유도되는 타이밍 위상 스텝을 제거하기 위한 방법 및 장치 |
JP3351163B2 (ja) | 1994-07-27 | 2002-11-25 | 株式会社日立製作所 | 情報記録再生装置及び信号処理回路 |
US5987634A (en) * | 1994-11-17 | 1999-11-16 | Cirrus Logic, Inc. | Channel quality circuit in a sampled amplitude read channel |
US5729396A (en) * | 1995-05-12 | 1998-03-17 | Cirrus Logic, Inc. | Fault tolerant sync mark detector enabled relative to a frequency of an acquisition preamble for sampled amplitude recording |
US5768320A (en) * | 1995-09-05 | 1998-06-16 | Analog Devices, Inc. | Read system for implementing PR4 and higher order PRML signals |
US5889784A (en) * | 1996-02-05 | 1999-03-30 | Hewlett-Packard Company | Predictive failure detection for data storage systems |
US6172828B1 (en) | 1996-05-16 | 2001-01-09 | Hitachi, Ltd. | Signal processing apparatus and a disk control apparatus, with head positioning control based on digitized servo data |
KR100408388B1 (ko) * | 1996-05-17 | 2004-03-18 | 삼성전자주식회사 | 하드 디스크 드라이브의 판독 채널 인자값 설정 방법 |
US6563655B1 (en) * | 1996-05-20 | 2003-05-13 | Texas Instruments Incorporated | Method and apparatus for failsafing and extending range for write precompensation |
KR100268054B1 (ko) * | 1996-07-31 | 2000-10-16 | 윤종용 | 비터비검출기 임계치를 최적화하는 방법 |
TW369648B (en) * | 1996-09-02 | 1999-09-11 | Koninkl Philips Electronics Nv | Device for write compensation in magnetic media recording |
US6169429B1 (en) * | 1997-01-03 | 2001-01-02 | Texas Instruments Incorporated | HDD chip set partitioning |
JP3068027B2 (ja) * | 1997-03-18 | 2000-07-24 | 富士通株式会社 | 記録信号補正方法及びディスク装置 |
US6252731B1 (en) | 1997-10-16 | 2001-06-26 | Seagate Technology Llc | Parametric optimization using disc drive read channel quality measurements |
JP3006565B2 (ja) * | 1997-11-10 | 2000-02-07 | 日本ビクター株式会社 | ディジタル信号記録装置 |
US6028728A (en) * | 1998-01-14 | 2000-02-22 | Cirrus Logic, Inc. | Sampled amplitude read/write channel employing a sub-baud rate write clock |
US6292912B1 (en) * | 1998-02-27 | 2001-09-18 | Western Digital Technologies, Inc. | Disk drive having built-in self-test system for characterizing performance of the drive |
CN100449616C (zh) | 1999-02-12 | 2009-01-07 | 通用电气公司 | 数据存储介质及其形成方法、压印衬底及检索数据的方法 |
US6636372B1 (en) | 1999-04-20 | 2003-10-21 | Infineon Technologies North America Corp. | Accumulating read channel performance data |
US6438703B1 (en) * | 1999-05-10 | 2002-08-20 | International Business Machines Corporation | Method and system for selectively varying signal delay in response to detection of a quiescent signal |
US6288858B1 (en) | 1999-06-09 | 2001-09-11 | International Business Machines Corporation | Method for improving magnetic recording at high data rates for waveforms having a burst of transitions |
JP3886300B2 (ja) * | 1999-07-21 | 2007-02-28 | 富士通株式会社 | 信号処理装置及びその信号処理方法 |
US6754025B1 (en) * | 2000-01-12 | 2004-06-22 | Maxtor Corporation | Disk drive spindle motor speed and timing control |
JP3840048B2 (ja) * | 2000-05-10 | 2006-11-01 | 株式会社東芝 | 情報再生装置又は情報記録媒体の評価方法、所定の評価基準を満たした情報記録媒体、及び所定の評価基準を満たした情報記録媒体を再生する情報再生装置 |
JP4324316B2 (ja) * | 2000-10-23 | 2009-09-02 | 株式会社日立グローバルストレージテクノロジーズ | 垂直磁気記録再生装置 |
JP3870333B2 (ja) * | 2000-11-30 | 2007-01-17 | 富士通株式会社 | 磁気記録再生装置および磁気記録再生用lsi |
KR20030090761A (ko) * | 2001-04-19 | 2003-11-28 | 제너럴 일렉트릭 캄파니 | 회전 피복된 매체 |
EP1262970A1 (de) * | 2001-05-31 | 2002-12-04 | STMicroelectronics S.r.l. | Verfahren zur Optimierung eines PRML Datenempfangskanals für Datenspeichersysteme |
US6788481B2 (en) | 2002-03-21 | 2004-09-07 | International Business Machines Corporation | Process for measuring nonlinear transition shift (NLTS) at high recording densities with a giant magetoresistive (GMR) head |
KR100878521B1 (ko) * | 2002-05-09 | 2009-01-13 | 삼성전자주식회사 | 소프트 출력 발생장치 및 그 방법 |
US7248424B2 (en) * | 2003-04-25 | 2007-07-24 | Fujitsu Limited | Nonlinearity measuring method, nonlinearity measuring unit, magnetic recording/regenerating unit and LSI for magnetic recording/regenerating |
WO2004097804A1 (ja) * | 2003-04-25 | 2004-11-11 | Fujitsu Limited | 非線形性測定方法,非線形性測定装置,磁気記録再生装置および磁気記録再生用lsi |
US7405894B2 (en) * | 2004-07-08 | 2008-07-29 | Broadcom Corporation | Frequency, phase, and gain estimation technique for use in a read channel receiver of a hard disk drive |
US7158324B2 (en) * | 2004-09-20 | 2007-01-02 | Guzik Technical Enterprises | Self-adjusting PRML receiver |
US7480110B2 (en) * | 2005-04-13 | 2009-01-20 | Hewlett-Packard Development Company, L.P. | Medium dependent write equalization |
US7460323B2 (en) * | 2005-07-29 | 2008-12-02 | Hitachi Global Storage Technologies Netherlands B.V. | Methods and systems for automatically characterizing non-linearities of a read-back signal of a recording system |
US7643238B2 (en) * | 2005-08-29 | 2010-01-05 | Broadcom Corporation | Dibit extraction |
US7912158B2 (en) * | 2005-11-08 | 2011-03-22 | Navcom Technology, Inc. | Sampling threshold and gain for satellite navigation receiver |
KR20080104143A (ko) * | 2006-02-14 | 2008-12-01 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 광 디스크 판독용 비트 검출 |
US8301976B1 (en) | 2006-12-15 | 2012-10-30 | Marvell International Ltd. | Defect detector for holographic storage systems |
US7924523B2 (en) * | 2007-12-21 | 2011-04-12 | Lsi Corporation | Frequency domain approach for efficient computation of fixed-point equalization targets |
KR101500024B1 (ko) * | 2007-12-21 | 2015-03-06 | 엘에스아이 코포레이션 | 기록 채널들에서의 적응 이퀄라이징을 위한 시스템 및 방법들 |
US7924518B2 (en) * | 2008-08-27 | 2011-04-12 | Lsi Corporation | Systems and methods for adaptive write pre-compensation |
US7859780B2 (en) * | 2008-08-27 | 2010-12-28 | Agere Systems Inc. | Systems and methods for on-the-fly write pre-compensation estimation |
US9281908B2 (en) * | 2008-10-08 | 2016-03-08 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Systems and methods for memory efficient signal and noise estimation |
US7948702B2 (en) * | 2008-12-18 | 2011-05-24 | Lsi Corporation | Systems and methods for controlling data equalization |
US8154815B2 (en) * | 2008-12-18 | 2012-04-10 | Lsi Corporation | Systems and methods for generating equalization data using shift register architecture |
US7965467B2 (en) * | 2008-12-18 | 2011-06-21 | Lsi Corporation | Systems and methods for generating equalization data |
US7929240B2 (en) * | 2008-12-18 | 2011-04-19 | Lsi Corporation | Systems and methods for adaptive MRA compensation |
US7974030B2 (en) | 2008-12-23 | 2011-07-05 | Lsi Corporation | Systems and methods for dibit correction |
US7948699B2 (en) * | 2009-01-02 | 2011-05-24 | Lsi Corporation | Systems and methods for equalizer optimization in a storage access retry |
US7957251B2 (en) | 2009-02-16 | 2011-06-07 | Agere Systems Inc. | Systems and methods for reduced latency loop recovery |
US7969337B2 (en) * | 2009-07-27 | 2011-06-28 | Lsi Corporation | Systems and methods for two tier sampling correction in a data processing circuit |
US8139305B2 (en) * | 2009-09-14 | 2012-03-20 | Lsi Corporation | Systems and methods for timing and gain acquisition |
US8854752B2 (en) | 2011-05-03 | 2014-10-07 | Lsi Corporation | Systems and methods for track width determination |
US8762440B2 (en) | 2011-07-11 | 2014-06-24 | Lsi Corporation | Systems and methods for area efficient noise predictive filter calibration |
US8874633B2 (en) * | 2011-08-23 | 2014-10-28 | Lsi Corporation | Determining coefficients for digital low pass filter given cutoff and boost values for corresponding analog version |
US9112538B2 (en) | 2013-03-13 | 2015-08-18 | Avago Technologies General Ip (Singapore) Pte. Ltd. | Systems and methods for loop feedback |
US8848776B1 (en) | 2013-03-25 | 2014-09-30 | Lsi Corporation | Systems and methods for multi-dimensional signal equalization |
US8929010B1 (en) | 2013-08-21 | 2015-01-06 | Lsi Corporation | Systems and methods for loop pulse estimation |
US9830942B1 (en) | 2016-08-10 | 2017-11-28 | Seagate Technology Llc | Obtaining a predetermined phase shift in data using different write precompensation associated with different NRZI patterns |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4571734A (en) * | 1983-08-05 | 1986-02-18 | International Business Machines Corporation | Method and apparatus for decoding the output signal of a partial-response class-IV communication or recording-device channel |
DE3676825D1 (de) * | 1986-08-05 | 1991-02-14 | Ibm | Verstaerkungssteuerungsschaltung fuer ein wiedergabegeraet in einem magnetischen aufzeichnungssystem, welches ein verfahren mit partieller wiedergabe und hoechster wahrscheinlichkeit verwendet. |
US5241429A (en) * | 1989-03-03 | 1993-08-31 | Seagate Technology, Inc. | Adaptive prewrite compensation apparatus and method |
US5392295A (en) * | 1992-07-30 | 1995-02-21 | International Business Machines Corporation | Error measurement circuit |
US5311178A (en) * | 1992-08-14 | 1994-05-10 | Silicon Systems, Inc. | Method for processing sample values in an RLL channel |
US5341249A (en) * | 1992-08-27 | 1994-08-23 | Quantum Corporation | Disk drive using PRML class IV sampling data detection with digital adaptive equalization |
-
1994
- 1994-10-04 US US08/317,902 patent/US5493454A/en not_active Expired - Lifetime
-
1995
- 1995-09-05 DE DE69524525T patent/DE69524525T2/de not_active Expired - Fee Related
- 1995-09-05 EP EP95306204A patent/EP0706173B1/de not_active Expired - Lifetime
- 1995-09-18 KR KR1019950030409A patent/KR960015387A/ko not_active Application Discontinuation
- 1995-10-03 JP JP7256344A patent/JPH08115503A/ja not_active Withdrawn
- 1995-11-17 US US08/560,084 patent/US5583705A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE69524525T2 (de) | 2002-05-23 |
US5583705A (en) | 1996-12-10 |
US5493454A (en) | 1996-02-20 |
JPH08115503A (ja) | 1996-05-07 |
EP0706173A1 (de) | 1996-04-10 |
KR960015387A (ko) | 1996-05-22 |
EP0706173B1 (de) | 2001-12-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |