GB2419052B - Composite output stage for hard disk drive preamplifier - Google Patents

Composite output stage for hard disk drive preamplifier

Info

Publication number
GB2419052B
GB2419052B GB0520264A GB0520264A GB2419052B GB 2419052 B GB2419052 B GB 2419052B GB 0520264 A GB0520264 A GB 0520264A GB 0520264 A GB0520264 A GB 0520264A GB 2419052 B GB2419052 B GB 2419052B
Authority
GB
United Kingdom
Prior art keywords
hard disk
disk drive
output stage
composite output
drive preamplifier
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
Application number
GB0520264A
Other languages
English (en)
Other versions
GB2419052A (en
GB0520264D0 (en
Inventor
Jonathan H Fischer
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.)
Agere Systems LLC
Original Assignee
Agere Systems LLC
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 Agere Systems LLC filed Critical Agere Systems LLC
Publication of GB0520264D0 publication Critical patent/GB0520264D0/en
Publication of GB2419052A publication Critical patent/GB2419052A/en
Application granted granted Critical
Publication of GB2419052B publication Critical patent/GB2419052B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3001—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor with field-effect transistors
    • H03F3/3008—Bifet SEPP output stages
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3001—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor with field-effect transistors
    • H03F3/3061—Bridge type, i.e. two complementary controlled SEPP output stages
    • H03F3/3062—Bridge type, i.e. two complementary controlled SEPP output stages with asymmetrical driving of the end stage
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/30—Single-ended push-pull [SEPP] amplifiers; Phase-splitters therefor
    • H03F3/3081—Duplicated single-ended push-pull arrangements, i.e. bridge circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/4508—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using bipolar transistors as the active amplifying circuit
    • H03F3/45098—PI types
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
    • H03F3/45—Differential amplifiers
    • H03F3/45071—Differential amplifiers with semiconductor devices only
    • H03F3/45076—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier
    • H03F3/45179—Differential amplifiers with semiconductor devices only characterised by the way of implementation of the active amplifying circuit in the differential amplifier using MOSFET transistors as the active amplifying circuit
    • H03F3/45197—Pl types
    • 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
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45652—Indexing scheme relating to differential amplifiers the LC comprising one or more further dif amp stages, either identical to the dif amp or not, in cascade
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03F—AMPLIFIERS
    • H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
    • H03F2203/45—Indexing scheme relating to differential amplifiers
    • H03F2203/45722—Indexing scheme relating to differential amplifiers the LC comprising one or more source followers, as post buffer or driver stages, in cascade in the LC

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Amplifiers (AREA)
GB0520264A 2004-10-06 2005-10-05 Composite output stage for hard disk drive preamplifier Expired - Fee Related GB2419052B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US61679004P 2004-10-06 2004-10-06
US11/216,993 US7466200B2 (en) 2004-10-06 2005-08-31 Composite output stage for hard disk drive preamplifier

Publications (3)

Publication Number Publication Date
GB0520264D0 GB0520264D0 (en) 2005-11-16
GB2419052A GB2419052A (en) 2006-04-12
GB2419052B true GB2419052B (en) 2009-03-18

Family

ID=35429866

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0520264A Expired - Fee Related GB2419052B (en) 2004-10-06 2005-10-05 Composite output stage for hard disk drive preamplifier

Country Status (5)

Country Link
US (1) US7466200B2 (cg-RX-API-DMAC10.html)
JP (1) JP2006109485A (cg-RX-API-DMAC10.html)
KR (2) KR101215848B1 (cg-RX-API-DMAC10.html)
GB (1) GB2419052B (cg-RX-API-DMAC10.html)
TW (1) TWI387964B (cg-RX-API-DMAC10.html)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7746590B2 (en) * 2004-10-06 2010-06-29 Agere Systems Inc. Current mirrors having fast turn-on time
JP5406470B2 (ja) * 2008-06-20 2014-02-05 キヤノン株式会社 バッファ駆動装置
RU2421895C1 (ru) * 2010-05-04 2011-06-20 Государственное образовательное учреждение высшего профессионального образования "Южно-Российский государственный университет экономики и сервиса" (ГОУ ВПО "ЮРГУЭС") Дифференциальный усилитель
US8953267B2 (en) * 2011-11-01 2015-02-10 Lsi Corporation Digital input detector and associated adaptive power supply
US8681442B2 (en) 2012-05-11 2014-03-25 Western Digital Technologies, Inc. Disk drive comprising extended range head proximity sensor
US9887552B2 (en) * 2013-03-14 2018-02-06 Analog Devices, Inc. Fine timing adjustment method
US10026456B2 (en) * 2015-02-23 2018-07-17 Qualcomm Incorporated Bitline positive boost write-assist circuits for memory bit cells employing a P-type Field-Effect transistor (PFET) write port(s), and related systems and methods
US11855588B2 (en) 2022-01-21 2023-12-26 Stmicroelectronics S.R.L. Differential driver

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0669709A1 (en) * 1994-02-28 1995-08-30 STMicroelectronics S.r.l. Output stage especially for integrated amplifiers with externally connected output power devices
JP2001297414A (ja) * 2000-04-18 2001-10-26 Hitachi Ltd ヘッドバイアス回路及びこれを用いた磁気ディスク装置
US20040150430A1 (en) * 2001-11-19 2004-08-05 Broadcom Corporation Voltage mode differential driver and method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9303138D0 (en) * 1993-02-17 1993-03-31 Plessey Semiconductors Ltd Integrated circuit amplifiers
JPH09289419A (ja) * 1996-04-22 1997-11-04 Hitachi Ltd 半導体集積回路および磁気ディスク駆動装置
JP2001257578A (ja) * 2000-03-09 2001-09-21 Nec Corp ドライバ回路
JP4574813B2 (ja) * 2000-08-09 2010-11-04 旭化成エレクトロニクス株式会社 増幅回路
JP3883037B2 (ja) * 2001-02-28 2007-02-21 株式会社日立製作所 媒体記録再生システム
US6965266B1 (en) * 2004-02-10 2005-11-15 Intersil America's Inc. High voltage differential amplifier using low voltage devices
US7126596B1 (en) * 2004-02-18 2006-10-24 Analog Devices, Inc. Rail-to-rail amplifier for use in line-inversion LCD grayscale reference generator

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0669709A1 (en) * 1994-02-28 1995-08-30 STMicroelectronics S.r.l. Output stage especially for integrated amplifiers with externally connected output power devices
JP2001297414A (ja) * 2000-04-18 2001-10-26 Hitachi Ltd ヘッドバイアス回路及びこれを用いた磁気ディスク装置
US20040150430A1 (en) * 2001-11-19 2004-08-05 Broadcom Corporation Voltage mode differential driver and method

Also Published As

Publication number Publication date
JP2006109485A (ja) 2006-04-20
GB2419052A (en) 2006-04-12
US20060072232A1 (en) 2006-04-06
KR20060092961A (ko) 2006-08-23
KR101259368B1 (ko) 2013-04-30
KR101215848B1 (ko) 2012-12-31
TW200627405A (en) 2006-08-01
KR20120058484A (ko) 2012-06-07
US7466200B2 (en) 2008-12-16
TWI387964B (zh) 2013-03-01
GB0520264D0 (en) 2005-11-16

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20151005