TWI536374B - 利用多等級寫入電流之磁性記錄系統 - Google Patents
利用多等級寫入電流之磁性記錄系統 Download PDFInfo
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- TWI536374B TWI536374B TW101134964A TW101134964A TWI536374B TW I536374 B TWI536374 B TW I536374B TW 101134964 A TW101134964 A TW 101134964A TW 101134964 A TW101134964 A TW 101134964A TW I536374 B TWI536374 B TW I536374B
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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
-
- 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
- G11B20/10018—Improvement or modification of read or write signals analog processing for digital recording or reproduction
- G11B20/10027—Improvement or modification of read or write signals analog processing for digital recording or reproduction adjusting the signal strength during recording or reproduction, e.g. variable gain amplifiers
-
- 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
- G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
-
- 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
- G11B5/02—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
- G11B2220/00—Record carriers by type
- G11B2220/20—Disc-shaped record carriers
- G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
- G11B2220/2508—Magnetic discs
- G11B2220/2516—Hard disks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Digital Magnetic Recording (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|
| TW201333944A TW201333944A (zh) | 2013-08-16 |
| TWI536374B true TWI536374B (zh) | 2016-06-01 |
Family
ID=46851843
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| TW101134964A TWI536374B (zh) | 2011-11-22 | 2012-09-24 | 利用多等級寫入電流之磁性記錄系統 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20130128375A1 (https=) |
| EP (1) | EP2597641A1 (https=) |
| JP (1) | JP2013109815A (https=) |
| KR (1) | KR20130056819A (https=) |
| CN (1) | CN103137142A (https=) |
| TW (1) | TWI536374B (https=) |
Families Citing this family (31)
| 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 |
| US9601152B2 (en) * | 2015-03-06 | 2017-03-21 | Texas Instruments Incorporated | Additional overshoot current HDD write driver circuit |
| US20160260454A1 (en) * | 2015-03-06 | 2016-09-08 | Texas Instruments Incorporated | Configurable write current overshoot system for hdd write driver |
| 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 |
| 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 |
| 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 |
| 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 |
| US11894025B1 (en) | 2022-03-09 | 2024-02-06 | Marvell Asia Pte Ltd | Disk writing mode providing main pole relaxation |
| US11915729B1 (en) | 2022-03-09 | 2024-02-27 | Marvell Asia Pte Ltd | Disk writing mode with timing control of main pole relaxation |
Family Cites Families (8)
| 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 |
| DE10195964T1 (de) * | 2000-03-31 | 2003-06-18 | Seagate Technology Llc | Pulsschreibstrom ausgestaltet für einen Feldaufrechterhaltungsstrom in einer Datenspeichervorrichtung |
| 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 |
-
2011
- 2011-11-22 US US13/302,169 patent/US20130128375A1/en not_active Abandoned
-
2012
- 2012-09-11 EP EP12183937.7A patent/EP2597641A1/en not_active Withdrawn
- 2012-09-21 KR KR1020120104914A patent/KR20130056819A/ko not_active Withdrawn
- 2012-09-21 JP JP2012208610A patent/JP2013109815A/ja not_active Withdrawn
- 2012-09-21 CN CN2012103565438A patent/CN103137142A/zh active Pending
- 2012-09-24 TW TW101134964A patent/TWI536374B/zh not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| US20130128375A1 (en) | 2013-05-23 |
| EP2597641A1 (en) | 2013-05-29 |
| TW201333944A (zh) | 2013-08-16 |
| KR20130056819A (ko) | 2013-05-30 |
| CN103137142A (zh) | 2013-06-05 |
| JP2013109815A (ja) | 2013-06-06 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Annulment or lapse of patent due to non-payment of fees |