JP2013109815A5 - - Google Patents

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Publication number
JP2013109815A5
JP2013109815A5 JP2012208610A JP2012208610A JP2013109815A5 JP 2013109815 A5 JP2013109815 A5 JP 2013109815A5 JP 2012208610 A JP2012208610 A JP 2012208610A JP 2012208610 A JP2012208610 A JP 2012208610A JP 2013109815 A5 JP2013109815 A5 JP 2013109815A5
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JP
Japan
Prior art keywords
write
data
level
operable
transition
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JP2012208610A
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English (en)
Japanese (ja)
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JP2013109815A (ja
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Priority claimed from US13/302,169 external-priority patent/US20130128375A1/en
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Publication of JP2013109815A publication Critical patent/JP2013109815A/ja
Publication of JP2013109815A5 publication Critical patent/JP2013109815A5/ja
Withdrawn legal-status Critical Current

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JP2012208610A 2011-11-22 2012-09-21 多値書込み電流を用いる磁気記録システム Withdrawn JP2013109815A (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/302,169 2011-11-22
US13/302,169 US20130128375A1 (en) 2011-11-22 2011-11-22 Magnetic Recording System With Multi-Level Write Current

Publications (2)

Publication Number Publication Date
JP2013109815A JP2013109815A (ja) 2013-06-06
JP2013109815A5 true JP2013109815A5 (enExample) 2015-10-01

Family

ID=46851843

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012208610A Withdrawn JP2013109815A (ja) 2011-11-22 2012-09-21 多値書込み電流を用いる磁気記録システム

Country Status (6)

Country Link
US (1) US20130128375A1 (enExample)
EP (1) EP2597641A1 (enExample)
JP (1) JP2013109815A (enExample)
KR (1) KR20130056819A (enExample)
CN (1) CN103137142A (enExample)
TW (1) TWI536374B (enExample)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5048860B1 (ja) * 2011-08-29 2012-10-17 株式会社日立製作所 磁気記録装置
US9030770B2 (en) * 2012-11-02 2015-05-12 HGST Netherlands B.V. Programmable analog feed-forward timer for dynamic wave shaping
US9105276B2 (en) * 2013-02-13 2015-08-11 Avago Technologies General Ip (Singapore) Pte. Ltd. System and method for providing controllable steady state current waveshaping in a hard disk drive (HDD) preamplifier
KR20150022241A (ko) * 2013-08-22 2015-03-04 에스케이하이닉스 주식회사 반도체 메모리 장치
US9013816B2 (en) 2013-08-27 2015-04-21 Lsi Corporation Adaptive pattern detection for pattern-dependent write current control in a magnetic recording system
US8792197B1 (en) 2013-09-20 2014-07-29 Lsi Corporation Storage device with driver controller providing pattern-dependent write functionality
US8929013B1 (en) * 2013-11-08 2015-01-06 Lsi Corporation Storage system with pattern dependent write
US9430148B2 (en) 2014-05-01 2016-08-30 Avago Technologies General Ip (Singapore) Pte. Ltd. Multiplexed synchronous serial port communication with skew control for storage device
US9281005B2 (en) 2014-05-01 2016-03-08 Avago Technologies General Ip (Singapore) Pte. Ltd. Multiplexed communication in a storage device
US9343103B2 (en) 2014-07-11 2016-05-17 Avago Technologies General Ip (Singapore) Pte. Ltd. Serial port communication for storage device using single bidirectional serial data line
US9111561B1 (en) * 2014-10-28 2015-08-18 HGST Netherlands B.V. Magnetic recording disk drive with write current overshoot amplitude (OSA) responsive to data transitions
US9183859B1 (en) * 2014-11-11 2015-11-10 Western Digital (Fremont), Llc HAMR writer pole length characterization
US9530447B2 (en) * 2015-02-27 2016-12-27 Seagate Technology Llc Adaptive HAMR power data storage device
US20160260454A1 (en) * 2015-03-06 2016-09-08 Texas Instruments Incorporated Configurable write current overshoot system for hdd write driver
US9601152B2 (en) * 2015-03-06 2017-03-21 Texas Instruments Incorporated Additional overshoot current HDD write driver circuit
US9275656B1 (en) 2015-07-20 2016-03-01 HGST Netherlands B.V. Disk drive with channel and preamp with dynamic write-current control for write head
US10164592B1 (en) * 2015-08-24 2018-12-25 Seagate Technology Llc Individually programmable preamplifier
US9368132B1 (en) 2015-09-04 2016-06-14 Western Digital Technologies, Inc. Data storage device employing differential write data signal and differential write pattern signal
US9754610B2 (en) * 2015-12-21 2017-09-05 Avago Technologies General Ip (Singapore) Pte. Ltd. Magnetic recording system with ternary pattern dependent write signaling
US9715887B2 (en) * 2015-12-28 2017-07-25 Avago Technologies General Ip (Singapore) Pte. Ltd. Magnetic recording system using pattern dependent writer having register pages for storing write currents
US9721588B2 (en) * 2015-12-28 2017-08-01 Avago Technologies General Ip (Singapore) Pte. Ltd. Magnetic recording system including differentiated write current emphasis signal generator circuit
US9536604B1 (en) 2016-01-06 2017-01-03 International Business Machines Corporation Impedance matching system for DDR memory
JP2018049677A (ja) 2016-09-23 2018-03-29 株式会社東芝 磁気ディスク装置、調整方法、及び製造方法
US9824699B1 (en) * 2017-01-31 2017-11-21 Seagate Technology Llc Lumped-parameter thermal model of a write transducer for clearance control on magnetic recording device
JP2018147526A (ja) * 2017-03-01 2018-09-20 株式会社東芝 磁気ディスク装置
JP2019016418A (ja) 2017-07-10 2019-01-31 株式会社東芝 磁気記録再生装置
JP2019046523A (ja) * 2017-09-04 2019-03-22 株式会社東芝 磁気ディスク装置及びライト処理方法
US10991391B1 (en) * 2020-02-04 2021-04-27 Headway Technologies, Inc. Circuits and methods for modifying the write current waveform to improve track density in HDD
US11495249B1 (en) * 2021-04-12 2022-11-08 Seagate Technology Llc Method and apparatus for magnetically recording data with three or more states per unit of data
US11915729B1 (en) 2022-03-09 2024-02-27 Marvell Asia Pte Ltd Disk writing mode with timing control of main pole relaxation
US11894025B1 (en) 2022-03-09 2024-02-06 Marvell Asia Pte Ltd Disk writing mode providing main pole relaxation

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US4482927A (en) * 1982-01-15 1984-11-13 Sperry Corporation Ternary magnetic recording and reproducing system with simultaneous overwrite
WO1995035565A1 (en) * 1994-06-17 1995-12-28 Minnesota Mining And Manufacturing Company Nrz magnetic recording
CN1443350A (zh) * 2000-03-31 2003-09-17 西加特技术有限责任公司 数据存储设备中适用于配合场维持电流使用的脉冲写电流
US6826003B1 (en) * 2002-01-31 2004-11-30 Western Digital Technologies, Inc. Disk drive comprising a pattern dependent overshoot circuit for controlling write current overshoot
KR100468778B1 (ko) * 2002-12-13 2005-01-29 삼성전자주식회사 하드디스크 드라이브의 기록 전류 최적화 방법 및 기록밀도 설정 방법
US7372649B2 (en) * 2003-04-03 2008-05-13 Texas Instruments Incorporated Apparatus and method for applying write signals for driving a write head
KR100532486B1 (ko) * 2003-12-24 2005-12-02 삼성전자주식회사 하드디스크 드라이브의 기록 전류 제어 방법
US7944641B2 (en) * 2008-01-28 2011-05-17 Samsung Electronics Co., Ltd. Overshoot duration range selection in a hard disk drive

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