DE60037030D1 - Auf der ermittlung eines verhältnisses basierendes verfahren zur messung des widerstands eines mr lesekopfes - Google Patents

Auf der ermittlung eines verhältnisses basierendes verfahren zur messung des widerstands eines mr lesekopfes

Info

Publication number
DE60037030D1
DE60037030D1 DE60037030T DE60037030T DE60037030D1 DE 60037030 D1 DE60037030 D1 DE 60037030D1 DE 60037030 T DE60037030 T DE 60037030T DE 60037030 T DE60037030 T DE 60037030T DE 60037030 D1 DE60037030 D1 DE 60037030D1
Authority
DE
Germany
Prior art keywords
resistance
determination
measuring
reading head
related method
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 - Lifetime
Application number
DE60037030T
Other languages
English (en)
Other versions
DE60037030T2 (de
Inventor
Larry Leeroy Tretter
James Ernest Malmberg
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.)
International Business Machines Corp
Original Assignee
International Business Machines Corp
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 International Business Machines Corp filed Critical International Business Machines Corp
Application granted granted Critical
Publication of DE60037030D1 publication Critical patent/DE60037030D1/de
Publication of DE60037030T2 publication Critical patent/DE60037030T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • G01R27/14—Measuring resistance by measuring current or voltage obtained from a reference source
    • 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
    • G11B5/008—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires
    • G11B5/00813—Recording on, or reproducing or erasing from, magnetic tapes, sheets, e.g. cards, or wires magnetic tapes
    • 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
    • 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
    • G11B5/40—Protective measures on heads, e.g. against excessive temperature 
    • 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
    • G11B33/00—Constructional parts, details or accessories not provided for in the other groups of this subclass
    • G11B33/10—Indicating arrangements; Warning arrangements
    • 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
    • G11B5/455—Arrangements for functional testing of heads; Measuring arrangements for heads

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Magnetic Heads (AREA)
  • Digital Magnetic Recording (AREA)
  • Measurement Of Resistance Or Impedance (AREA)
  • Recording Or Reproducing By Magnetic Means (AREA)
  • Measuring Magnetic Variables (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
DE60037030T 1999-09-14 2000-09-08 Auf der ermittlung eines verhältnisses basierendes verfahren zur messung des widerstands eines mr lesekopfes Expired - Lifetime DE60037030T2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09/395,147 US6320713B1 (en) 1999-09-14 1999-09-14 Ratio method for measurement of MR read head resistance
US395147 1999-09-14
PCT/GB2000/003445 WO2001020599A1 (en) 1999-09-14 2000-09-08 Ratio method for measurement of mr read head resistance

Publications (2)

Publication Number Publication Date
DE60037030D1 true DE60037030D1 (de) 2007-12-20
DE60037030T2 DE60037030T2 (de) 2008-08-21

Family

ID=23561900

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60037030T Expired - Lifetime DE60037030T2 (de) 1999-09-14 2000-09-08 Auf der ermittlung eines verhältnisses basierendes verfahren zur messung des widerstands eines mr lesekopfes

Country Status (13)

Country Link
US (1) US6320713B1 (de)
EP (1) EP1214708B1 (de)
JP (1) JP4080744B2 (de)
CN (1) CN1181469C (de)
AT (1) ATE377823T1 (de)
AU (1) AU7024600A (de)
CZ (1) CZ2002894A3 (de)
DE (1) DE60037030T2 (de)
HU (1) HUP0202783A2 (de)
MY (1) MY125367A (de)
PL (1) PL353993A1 (de)
TW (1) TW501107B (de)
WO (1) WO2001020599A1 (de)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6512367B2 (en) * 2000-02-11 2003-01-28 Seagate Technology Llc Method and apparatus for testing a magnetic head
US6731448B2 (en) * 2001-09-26 2004-05-04 Agere Systems, Inc. Accurate resistance measurement for magnetoresistive head
EP1333427A3 (de) * 2002-01-31 2008-04-30 Texas Instruments Incorporated Schaltung zum Lesen von differentialen Daten einer Platte mittels Spannungsanlegen zur Vorspannung eines Lesekopfes
SG141209A1 (en) * 2002-03-08 2008-04-28 Seagate Technology Llc Abnormal magnetoresistive element detection for a disc drive
JP3857255B2 (ja) * 2003-06-12 2006-12-13 ローム株式会社 磁気記録再生装置
US7130143B1 (en) * 2005-04-28 2006-10-31 International Business Machines Corporation Apparatus, system, and method for measuring magnetoresistive head resistance
US7630159B2 (en) * 2005-05-27 2009-12-08 Agere Systems Inc. Resistance mode comparator for determining head resistance
US7692887B2 (en) * 2006-09-13 2010-04-06 Agere Systems Inc. Method and apparatus for measuring resistance of a resistive sensor
US8107181B2 (en) * 2006-10-30 2012-01-31 International Business Machines Corporation Apparatus, system, and method for measuring magnetoresistive head resistance
US7804657B1 (en) 2007-06-11 2010-09-28 Western Digital Technologies, Inc. Setting an operating bias current for a magnetoresistive head using ratio of target voltage and measured voltage
US7872824B1 (en) * 2007-06-11 2011-01-18 Western Digital (Fremont), Llc Setting an operating bias current for a magnetoresistive head by computing a target operating voltage
US8179151B2 (en) * 2008-04-04 2012-05-15 Fairchild Semiconductor Corporation Method and system that determines the value of a resistor in linear and non-linear resistor sets
US7760458B1 (en) 2008-08-12 2010-07-20 Western Digital Technologies, Inc. Disk drive adjusting head bias during servo synchronization to compensate for over/under sensitivity
US8279549B2 (en) * 2009-04-29 2012-10-02 Texas Instruments Incorporated System and method for setting bias for MR head
CN102213732B (zh) * 2010-03-31 2014-11-19 新科实业有限公司 使用公共测量器测量不同类型长形条的磁头电阻的方法
CN105467219A (zh) * 2014-09-04 2016-04-06 盛微先进科技股份有限公司 负载阻抗测量系统和方法
US9569121B1 (en) * 2015-11-25 2017-02-14 Seagate Technology Llc Heat assisted magnetic recording (HAMR) utilization analysis and reporting system
CN109061529A (zh) * 2018-06-27 2018-12-21 中国科学院微电子研究所 一种测量有机半导体的有机磁阻的方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4716306A (en) 1983-08-15 1987-12-29 Hitachi, Ltd. Circuit for detecting variation of resistance of a variable-resistance element
US5412518A (en) * 1993-12-16 1995-05-02 International Business Machines Corporation Individual MR transducer head/disk/channel adaptive bias current system
US5726821A (en) 1995-12-22 1998-03-10 Western Digital Corporation Programmable preamplifier unit with serial interface for disk data storage device using MR heads
US5774291A (en) 1996-03-28 1998-06-30 International Business Machines Corporation Voltage measurement circuit for a magnetoresistive head installed in a disk enclosure
JP3142782B2 (ja) * 1996-09-30 2001-03-07 富士通株式会社 磁気抵抗効果型磁気ヘッドのバイアス電流の調整装置とその調整方法及び磁気記憶装置
US5790334A (en) * 1996-10-02 1998-08-04 International Business Machines Corporation Circuit and method for optimizing bias supply in a magnetoresistive head based on the thermal properties of the MR head itself
FR2781285A1 (fr) * 1998-07-17 2000-01-21 Koninkl Philips Electronics Nv Dispositif de mesure automatique d'une resistance

Also Published As

Publication number Publication date
EP1214708B1 (de) 2007-11-07
JP4080744B2 (ja) 2008-04-23
DE60037030T2 (de) 2008-08-21
EP1214708A1 (de) 2002-06-19
PL353993A1 (en) 2003-12-15
MY125367A (en) 2006-07-31
CZ2002894A3 (cs) 2002-06-12
AU7024600A (en) 2001-04-17
HUP0202783A2 (en) 2002-12-28
WO2001020599A1 (en) 2001-03-22
CN1373889A (zh) 2002-10-09
TW501107B (en) 2002-09-01
CN1181469C (zh) 2004-12-22
US6320713B1 (en) 2001-11-20
ATE377823T1 (de) 2007-11-15
JP2003509801A (ja) 2003-03-11

Similar Documents

Publication Publication Date Title
DE60037030D1 (de) Auf der ermittlung eines verhältnisses basierendes verfahren zur messung des widerstands eines mr lesekopfes
ATE312364T1 (de) Verfahren zur bestimmung der position eines sensorelementes
ATE404890T1 (de) Verfahren und vorrichtung zur schnellen tomographischen messung der elektrischen leitfähigkeitsverteilung in einer probe
ATE207609T1 (de) Verfahren und vorrichtung zur überprüfung eines sensors
DE69820921D1 (de) Verfahren und Instrument mit Taster zur Messung der Innen- oder Aussendimension eines Objektes
DE60124114D1 (de) Verfahren zur messung der motorkonstante eines induktionsmotors
DE60138891D1 (de) Messung der wanddicke eines elektrisch leitenden objekts
ATE211813T1 (de) Messkopf,apparat und verfahren zum kontrollieren der linearen dimensionen von einem mechanischen stück
DE69727724D1 (de) Verfahren zur Messung der Porosität mittels Neutronen
DE68917231D1 (de) Sondenkarte, Verfahren zur Messung eines zu messenden Teiles mit derselben und elektrischer Schaltungsteil.
DE69631959D1 (de) Schaltung zur vorbehandlung von lesesignalen eines mr-kopfes
DE60126751D1 (de) Verfahren und Vorrichtung zur Messung der Wellenform eines optischen Signals
ATA167294A (de) Sonde zur messung von druck- und temperaturprofilen
DE60002062D1 (de) Messung magnetischer felder unter verwendung eines an beiden enden befestigten drahtes
DE68923283D1 (de) Verfahren, prüfsonde und vorrichtung zur messung eines wechselsromspannungsabfalls.
DE50012309D1 (de) Verfahren zum Messen des Widerstands und der Induktivität einer Leitung
DK1079212T3 (da) Fremgangsmåde til magnetisk-induktiv flowmåling
DE50103527D1 (de) Sonde zur Messung von Druckschwingungen
DE59912946D1 (de) Messwertaufnehmer zur Temperaturmessung an ölgefüllten Betriebsmitteln und dafür geeignetes Verfahren zur Temperaturmessung
ATE317129T1 (de) Verfahren und vorrichtung zum ermitteln der qualität eines kabels
ATE276520T1 (de) Verfahren zur bestimmung des momentanstromwertes einer impulsgesteuerten induktiven last
DE50206677D1 (de) Verfahren zur Erfassung der Luftfeuchtigkeit mit kapazitivem Feuchte-Messelement
DE60203524D1 (de) Verfahren zur messung des arteriolendrucks
ATE164684T1 (de) Verfahren und messvorrichtung zur messung der zeitkonstanten eines elektrischen wegaufnehmers
ATE192239T1 (de) Verfahren und messanordnung in digitalen systemen zum messen von wechselspannung, wechselstrom und phasenwinkel eines messsignals

Legal Events

Date Code Title Description
8364 No opposition during term of opposition
8320 Willingness to grant licences declared (paragraph 23)