JP2005285311A - ヘッド振幅特性付け装置 - Google Patents

ヘッド振幅特性付け装置 Download PDF

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Publication number
JP2005285311A
JP2005285311A JP2005065512A JP2005065512A JP2005285311A JP 2005285311 A JP2005285311 A JP 2005285311A JP 2005065512 A JP2005065512 A JP 2005065512A JP 2005065512 A JP2005065512 A JP 2005065512A JP 2005285311 A JP2005285311 A JP 2005285311A
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JP
Japan
Prior art keywords
signal
data
vga
code
dac
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.)
Withdrawn
Application number
JP2005065512A
Other languages
English (en)
Japanese (ja)
Other versions
JP2005285311A5 (enExample
Inventor
E Mitchell Chad
エイ ミッチェル チャド
L Pipal Vicki
エル ピパル ベッキ
Joey M Poss
エム ポス ジョイ
A Richetta Raymond
エイ リチェッタ レイモンド
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HGST Netherlands BV
HGST Inc
Original Assignee
Hitachi Global Storage Technologies Netherlands BV
Hitachi Global Storage Technologies Inc
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 Global Storage Technologies Netherlands BV, Hitachi Global Storage Technologies Inc filed Critical Hitachi Global Storage Technologies Netherlands BV
Publication of JP2005285311A publication Critical patent/JP2005285311A/ja
Publication of JP2005285311A5 publication Critical patent/JP2005285311A5/ja
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B21/00—Head arrangements not specific to the method of recording or reproducing
    • G11B21/02—Driving or moving of heads
    • 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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Digital Magnetic Recording (AREA)
JP2005065512A 2004-03-29 2005-03-09 ヘッド振幅特性付け装置 Withdrawn JP2005285311A (ja)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/811,523 US7027243B2 (en) 2004-03-29 2004-03-29 Apparatus for providing head amplitude characterization

Publications (2)

Publication Number Publication Date
JP2005285311A true JP2005285311A (ja) 2005-10-13
JP2005285311A5 JP2005285311A5 (enExample) 2008-04-17

Family

ID=34989520

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005065512A Withdrawn JP2005285311A (ja) 2004-03-29 2005-03-09 ヘッド振幅特性付け装置

Country Status (4)

Country Link
US (1) US7027243B2 (enExample)
JP (1) JP2005285311A (enExample)
KR (1) KR20060044791A (enExample)
CN (1) CN100409347C (enExample)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7227709B1 (en) 2006-01-23 2007-06-05 Hitachi Global Storage Technologies Netherlands B.V. System and method for providing head amplitude characterization
KR100736409B1 (ko) * 2006-06-26 2007-07-09 삼성전자주식회사 리드/라이트 채널회로, 및 이를 구비하는 하드 디스크드라이브
US8230313B2 (en) * 2008-08-11 2012-07-24 Texas Instruments Incorporated Low-power predecoding based viterbi decoding
US8223448B1 (en) 2010-04-22 2012-07-17 Western Digital Technologies, Inc. Disk drive calibrating preamp for servo sectors and data sectors
US8767326B2 (en) 2012-08-28 2014-07-01 Industrial Business Machines Corporation Dynamically controlling magnetoresistive bias
WO2015071991A1 (ja) * 2013-11-14 2015-05-21 富士機械製造株式会社 サーボコントローラ
CN112187200B (zh) * 2020-10-15 2022-10-14 上海麦歌恩微电子股份有限公司 自动增益控制系统及方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4635142A (en) * 1983-11-22 1987-01-06 Storage Technology Corporation Amplitude sensor with adaptive threshold generation
US5341249A (en) * 1992-08-27 1994-08-23 Quantum Corporation Disk drive using PRML class IV sampling data detection with digital adaptive equalization
US5668678B1 (en) * 1994-11-14 2000-11-28 Cirrus Logic Inc Detecting servo data and servo bursts from discrete time samples of an analog read signal in a sampled amplitude read channel
EP0860005A1 (en) * 1995-08-18 1998-08-26 Quantum Corporation Control loops for low power, high speed prml sampling data detection channel
US5737342A (en) * 1996-05-31 1998-04-07 Quantum Corporation Method for in-chip testing of digital circuits of a synchronously sampled data detection channel
SG52990A1 (en) * 1996-07-09 1998-09-28 Ibm Improvements to radial self-propagation pattern generation for disk file servowriting
US6282038B1 (en) * 1999-02-19 2001-08-28 International Business Machines Corporation Variable gain amplifier with temperature compensation for use in a disk drive system
IT1313390B1 (it) * 1999-07-16 2002-07-23 St Microelectronics Srl Metodo di ottimizzazione dei parametri di un filtro passabasso di pre-equalizzazione per canale di lettura.
US6252528B1 (en) * 1999-08-20 2001-06-26 Conexant Systems, Inc. System and method for variable gain coder-decoder
US6657803B1 (en) * 1999-11-22 2003-12-02 Seagate Technology Llc Method and apparatus for data error recovery using defect threshold detector and viterbi gain
US6429988B1 (en) * 2000-09-22 2002-08-06 International Business Machines Corporation System and method for calibrating a corner frequency of a tunable filter using ADC code difference method
JP4642264B2 (ja) * 2001-04-03 2011-03-02 株式会社日立国際電気 スペクトル拡散通信用相関回路
US6519103B2 (en) * 2001-05-25 2003-02-11 Infineon Technologies Ag View DAC feedback inside analog front circuit
US6661590B2 (en) * 2001-05-25 2003-12-09 Infineon Technologies Ag Efficient analog front end for a read/write channel of a hard disk drive running from a highly regulated power supply

Also Published As

Publication number Publication date
KR20060044791A (ko) 2006-05-16
CN100409347C (zh) 2008-08-06
US20050213238A1 (en) 2005-09-29
US7027243B2 (en) 2006-04-11
CN1677540A (zh) 2005-10-05

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