CN100409347C - 用于提供头振幅特征化的装置 - Google Patents

用于提供头振幅特征化的装置 Download PDF

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Publication number
CN100409347C
CN100409347C CNB2004100819828A CN200410081982A CN100409347C CN 100409347 C CN100409347 C CN 100409347C CN B2004100819828 A CNB2004100819828 A CN B2004100819828A CN 200410081982 A CN200410081982 A CN 200410081982A CN 100409347 C CN100409347 C CN 100409347C
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CN
China
Prior art keywords
vga
adc
code
dac
analog
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
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CNB2004100819828A
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English (en)
Chinese (zh)
Other versions
CN1677540A (zh
Inventor
查德·E·米切尔
维基·L·皮帕尔
乔伊·M·波斯
雷蒙德·A·里奇塔
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HGST Netherlands BV
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Hitachi Global Storage Technologies Inc
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Publication of CN1677540A publication Critical patent/CN1677540A/zh
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Publication of CN100409347C publication Critical patent/CN100409347C/zh
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    • 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

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Digital Magnetic Recording (AREA)
CNB2004100819828A 2004-03-29 2004-12-29 用于提供头振幅特征化的装置 Expired - Fee Related CN100409347C (zh)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
CN1677540A CN1677540A (zh) 2005-10-05
CN100409347C true CN100409347C (zh) 2008-08-06

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ID=34989520

Family Applications (1)

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CNB2004100819828A Expired - Fee Related CN100409347C (zh) 2004-03-29 2004-12-29 用于提供头振幅特征化的装置

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

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
US5886842A (en) * 1995-08-18 1999-03-23 Quantum Corporation Control loops for low power, high speed PRML sampling data detection channel
CN1340193A (zh) * 1999-02-19 2002-03-13 国际商业机器公司 供磁盘驱动系统使用的带有温度补偿的可变增益放大器
WO2002097811A1 (en) * 2001-05-25 2002-12-05 Infineon Technologies Ag Dac feedback inside analog front circuit
CN1391693A (zh) * 1999-11-22 2003-01-15 西加特技术有限责任公司 利用故障门限检测器和维特比增益进行数据差错复原的方法和设备

Family Cites Families (9)

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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
SG52990A1 (en) * 1996-07-09 1998-09-28 Ibm Improvements to radial self-propagation pattern generation for disk file servowriting
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
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
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

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5886842A (en) * 1995-08-18 1999-03-23 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
CN1340193A (zh) * 1999-02-19 2002-03-13 国际商业机器公司 供磁盘驱动系统使用的带有温度补偿的可变增益放大器
CN1391693A (zh) * 1999-11-22 2003-01-15 西加特技术有限责任公司 利用故障门限检测器和维特比增益进行数据差错复原的方法和设备
WO2002097811A1 (en) * 2001-05-25 2002-12-05 Infineon Technologies Ag Dac feedback inside analog front circuit

Also Published As

Publication number Publication date
KR20060044791A (ko) 2006-05-16
US20050213238A1 (en) 2005-09-29
US7027243B2 (en) 2006-04-11
JP2005285311A (ja) 2005-10-13
CN1677540A (zh) 2005-10-05

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Owner name: HGST NETHERLANDS BV

Free format text: FORMER NAME: HITACHI GLOBAL STORAGE TECH

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Patentee after: Hitachi Global Storage Technologies Netherlands B. V.

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Granted publication date: 20080806

Termination date: 20171229

CF01 Termination of patent right due to non-payment of annual fee