JP4321437B2 - 磁気ディスクメモリ装置 - Google Patents

磁気ディスクメモリ装置 Download PDF

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Publication number
JP4321437B2
JP4321437B2 JP2004315003A JP2004315003A JP4321437B2 JP 4321437 B2 JP4321437 B2 JP 4321437B2 JP 2004315003 A JP2004315003 A JP 2004315003A JP 2004315003 A JP2004315003 A JP 2004315003A JP 4321437 B2 JP4321437 B2 JP 4321437B2
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Japan
Prior art keywords
circuit
read
head
memory device
magnetic disk
Prior art date
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Expired - Fee Related
Application number
JP2004315003A
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English (en)
Japanese (ja)
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JP2005267835A5 (enExample
JP2005267835A (ja
Inventor
新也 梶山
弘泰 吉澤
洋一郎 小林
一郎 杣田
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Hitachi Ltd
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Hitachi Ltd
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Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP2004315003A priority Critical patent/JP4321437B2/ja
Priority to US11/033,258 priority patent/US7082004B2/en
Publication of JP2005267835A publication Critical patent/JP2005267835A/ja
Publication of JP2005267835A5 publication Critical patent/JP2005267835A5/ja
Application granted granted Critical
Publication of JP4321437B2 publication Critical patent/JP4321437B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • 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
    • 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

Landscapes

  • Digital Magnetic Recording (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Hall/Mr Elements (AREA)
  • Amplifiers (AREA)
JP2004315003A 2004-02-18 2004-10-29 磁気ディスクメモリ装置 Expired - Fee Related JP4321437B2 (ja)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2004315003A JP4321437B2 (ja) 2004-02-18 2004-10-29 磁気ディスクメモリ装置
US11/033,258 US7082004B2 (en) 2004-02-18 2005-01-12 Disk storage systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2004040782 2004-02-18
JP2004315003A JP4321437B2 (ja) 2004-02-18 2004-10-29 磁気ディスクメモリ装置

Publications (3)

Publication Number Publication Date
JP2005267835A JP2005267835A (ja) 2005-09-29
JP2005267835A5 JP2005267835A5 (enExample) 2007-12-06
JP4321437B2 true JP4321437B2 (ja) 2009-08-26

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ID=34840217

Family Applications (1)

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JP2004315003A Expired - Fee Related JP4321437B2 (ja) 2004-02-18 2004-10-29 磁気ディスクメモリ装置

Country Status (2)

Country Link
US (1) US7082004B2 (enExample)
JP (1) JP4321437B2 (enExample)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7301394B2 (en) * 2004-12-13 2007-11-27 Broadcom Corporation Impedance matched variable gain low noise amplifier using shunt feed-back
JP2006209838A (ja) * 2005-01-26 2006-08-10 Hitachi Global Storage Technologies Netherlands Bv 配線部材及びそれを用いた磁気記録再生装置
US7259624B2 (en) * 2005-02-28 2007-08-21 Texas Instruments Incorporated Low noise AC coupled amplifier with low band-pass corner and low power
US20070127149A1 (en) * 2005-12-02 2007-06-07 Texas Instruments Incorporated Offset cancellation scheme for perpendicular reader
US7388387B2 (en) * 2006-01-11 2008-06-17 Stratosphere Solutions, Inc. Method and apparatus for measurement of electrical resistance
US8391153B2 (en) 2006-02-17 2013-03-05 Cisco Technology, Inc. Decoupling radio resource management from an access gateway
CN101496387B (zh) 2006-03-06 2012-09-05 思科技术公司 用于移动无线网络中的接入认证的系统和方法
US7675704B2 (en) * 2006-03-09 2010-03-09 Texas Instruments Incorporated Magnetoresistive head preamplifier circuit with programmable input impedance
JP2008103060A (ja) * 2006-09-20 2008-05-01 Fujitsu Ltd ヘッドｉｃ、リード回路及び媒体記憶装置
US8305704B2 (en) * 2007-04-20 2012-11-06 Texas Instruments Incorporated Write data switching for magnetic disk drives
JP2009117002A (ja) * 2007-11-09 2009-05-28 Fujitsu Ltd ヘッドｉｃ、リード回路及び媒体記憶装置
JP2009134806A (ja) * 2007-11-30 2009-06-18 Fujitsu Ltd ヘッドｉｃ、リード回路及び媒体記憶装置
JP2009140585A (ja) * 2007-12-07 2009-06-25 Fujitsu Ltd ヘッドｉｃ、リード回路、媒体記憶装置及びヘッドｉｃのアンプゲイン調整方法
US7835098B2 (en) * 2008-05-28 2010-11-16 Texas Instruments Incorporated Automatic gain control for magnetic disk-drive preamplifier
US8446217B2 (en) * 2008-07-17 2013-05-21 Imec Dual-loop feedback amplifying circuit
CN101662261B (zh) * 2009-08-12 2012-08-22 东南大学 一种高线性度折叠混频器
US8169726B2 (en) * 2010-07-19 2012-05-01 Lsi Corporation Disk file preamplifier frequency-response and time delay compensation
US9570096B2 (en) 2010-08-06 2017-02-14 HGST Netherlands B.V. Read path compensation for SNR and signal transfer
US9047917B1 (en) * 2013-11-26 2015-06-02 Western Digital Technologies, Inc. Disk drive slider with sense amplifier for coupling to a preamp through a supply/bias line and a read signal line
US9165596B1 (en) * 2015-03-13 2015-10-20 HGST Netherlands B.V. Magnetic recording disk drive with multiple preamplifiers and common transmission line with impedance compensation
US10381036B1 (en) * 2016-02-16 2019-08-13 Seagate Technology Llc Laser bias calibration

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6341046B1 (en) * 1995-04-14 2002-01-22 Agere Systems Guardian Corp. Current biasing voltage sensing preamplifier for magnetoresistive heads
US5914630A (en) * 1996-05-10 1999-06-22 Vtc Inc. MR head preamplifier with output signal amplitude which is independent of head resistance
US5834952A (en) * 1996-10-10 1998-11-10 Vtc Inc. Open-loop current mode biasing scheme for MR head
US6054901A (en) * 1997-10-02 2000-04-25 Motorola, Inc. Low noise preamplifier
US6175462B1 (en) * 1997-11-14 2001-01-16 International Business Machines Corporation High input impedance single ended, low supply voltage magnetoresistive preamplifier circuits
US5969523A (en) * 1997-11-14 1999-10-19 International Business Machines Corporation Preamplifier bias mode to re-initialize a GMR head after losing initialization
US6331921B1 (en) * 1998-07-06 2001-12-18 Agilent Technologies, Inc Magneto-resistive head read amplifier
US6252735B1 (en) * 1999-02-25 2001-06-26 International Business Machines Corporation Voltage-biasing, voltage-sensing differential preamplifier for magnetoresistive elements
US6583946B1 (en) * 1999-07-01 2003-06-24 Texas Instruments Incorporated Method of providing read bias during servo block write
US6404579B1 (en) * 1999-11-23 2002-06-11 Texas Instruments Incorporated Current bias voltage sense single ended preamplifier
JP2001209901A (ja) 2000-01-25 2001-08-03 Hitachi Ltd 磁気ディスクメモリ装置
US6532127B1 (en) * 2000-11-16 2003-03-11 Texas Instruments Incorporated Differential voltage bias, voltage sense preamplifier architecture
US6724556B2 (en) * 2001-06-29 2004-04-20 Texas Instruments Incorporated Single pole voltage bias loop for increased stability
US6724551B2 (en) * 2001-06-29 2004-04-20 Texas Instruments Incorporated Preamp fast head switch technique for servo mode
US6349007B1 (en) * 2001-07-25 2002-02-19 Texas Instruments Incorporated Magneto-resistive head open and short fault detection independent of head bias for voltage bias preamplifier
JP2003069352A (ja) 2001-08-23 2003-03-07 Murata Mfg Co Ltd Ｆｅｔ差動増幅回路およびそれを用いた電子装置
US20030193731A1 (en) * 2002-04-11 2003-10-16 Texas Instruments Incorporated Balanced MR head bias technique for magneto-resistive preamplifier operating in a single supply environment
US6822817B2 (en) * 2002-10-31 2004-11-23 International Business Machines Corporation Preamplifier circuit suitable for use in magnetic storage devices
US7251091B2 (en) * 2003-12-30 2007-07-31 Texas Instruments Incorporated Current-sense bias circuit for a magnetoresistive head and method of sensing a current therethrough
US7339760B2 (en) * 2004-01-30 2008-03-04 Agere Systems Inc. Integrated bias and offset recovery amplifier

Also Published As

Publication number Publication date
US20050180041A1 (en) 2005-08-18
US7082004B2 (en) 2006-07-25
JP2005267835A (ja) 2005-09-29

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