DE3369223D1 - Automatic reference adjustment for position error signal on disk file servo system - Google Patents
Automatic reference adjustment for position error signal on disk file servo systemInfo
- Publication number
- DE3369223D1 DE3369223D1 DE8383110301T DE3369223T DE3369223D1 DE 3369223 D1 DE3369223 D1 DE 3369223D1 DE 8383110301 T DE8383110301 T DE 8383110301T DE 3369223 T DE3369223 T DE 3369223T DE 3369223 D1 DE3369223 D1 DE 3369223D1
- Authority
- DE
- Germany
- Prior art keywords
- error signal
- position error
- servo system
- disk file
- reference adjustment
- 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
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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5526—Control therefor; circuits, track configurations or relative disposition of servo-information transducers and servo-information tracks for control thereof
- G11B5/553—Details
- G11B5/5547—"Seek" control and circuits therefor
-
- 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
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/596—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following for track following on disks
- G11B5/59605—Circuits
- G11B5/59622—Gain control; Filters
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/451,583 US4551776A (en) | 1982-12-20 | 1982-12-20 | Automatic reference adjustment for position error signal on disk file servo system |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3369223D1 true DE3369223D1 (en) | 1987-02-19 |
Family
ID=23792814
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE8383110301T Expired DE3369223D1 (en) | 1982-12-20 | 1983-10-17 | Automatic reference adjustment for position error signal on disk file servo system |
Country Status (4)
Country | Link |
---|---|
US (1) | US4551776A (de) |
EP (1) | EP0111665B1 (de) |
JP (1) | JPS59117758A (de) |
DE (1) | DE3369223D1 (de) |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4633345A (en) * | 1985-05-24 | 1986-12-30 | International Business Machines Corp. | Positioning misaligned disk heads |
US4878211A (en) * | 1986-05-26 | 1989-10-31 | Pioneer Electronic Corporation | Method and apparatus for correcting the loop gain of a servo loop in accordance with measurements during open-loop operation |
US4688118A (en) * | 1986-07-01 | 1987-08-18 | Hewlett-Packard Company | Servo gain compensation in a disc drive |
US4823212A (en) * | 1986-11-26 | 1989-04-18 | Hewlett-Packard Company | Sampled servo code format and system for a disc drive |
JP2612262B2 (ja) * | 1986-12-16 | 1997-05-21 | 富士通株式会社 | 磁気デイスク装置 |
US5241431A (en) * | 1987-03-03 | 1993-08-31 | Unisys Corporation | Apparatus for adjustment of position slope for servo |
US4989103A (en) * | 1987-03-03 | 1991-01-29 | Unisys Corp. | Adjustment of position slope for disk drive servo using half-track point |
US4797756A (en) * | 1987-03-05 | 1989-01-10 | Unisys Corp. | Method for positioning head in disk drive deriving "position" offset from "quadrature" signals |
US5034746A (en) * | 1988-09-21 | 1991-07-23 | International Business Machines Corporation | Analog-to-digital converter for computer disk file servo position error signal |
US5189571A (en) * | 1990-04-30 | 1993-02-23 | Seagate Technology, Inc. | Adaptive settle time minimization for a hard disk drive |
US5329409A (en) * | 1991-07-24 | 1994-07-12 | Seagate Technology, Inc. | Correction of current feedback offset for disc drive servo systems |
JP2608220B2 (ja) * | 1992-01-31 | 1997-05-07 | 富士通株式会社 | 磁気ディスク装置のポジション感度調整方法 |
US5299075A (en) * | 1992-06-04 | 1994-03-29 | Hewlett-Packard Company | Apparatus and method for shock attenuation in a disk recording and/or reproduction system using variable gain acceleration sensor |
US5691617A (en) * | 1993-07-12 | 1997-11-25 | Seagate Technology, Inc. | Disc drive transducer deadbeat settle method utilizing interval correction |
US5602692A (en) * | 1994-10-07 | 1997-02-11 | International Business Machines Corporation | Sampled position error signal demodulation system for banded data disk drives |
US5717538A (en) * | 1995-01-20 | 1998-02-10 | International Business Machines Corporation | Asynchronous position error signal detector employing weighted accumulation for use in servo system |
JP3292621B2 (ja) * | 1995-04-20 | 2002-06-17 | 富士通株式会社 | ディスク装置のポジション感度調整装置及び方法 |
JPH09128916A (ja) | 1995-10-31 | 1997-05-16 | Fujitsu Ltd | ディスク装置 |
US6067204A (en) * | 1996-06-03 | 2000-05-23 | Seagate Technology, Inc. | Disc drive servo pattern insensitive to read head |
US5774299A (en) * | 1996-08-13 | 1998-06-30 | Seagate Technology, Inc. | Adaptive calibration of read/write elements in a disc drive |
US6078445A (en) * | 1997-08-07 | 2000-06-20 | International Business Machines Corporation | Gain control for a dual burst, dual frequency PES servo pattern |
WO1999031956A2 (en) * | 1997-12-19 | 1999-07-01 | Lsi Logic Corporation | Automated servo gain adjustment using fourier transform |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3818502A (en) * | 1972-09-05 | 1974-06-18 | Ibm | Automatic head width correction |
US3881184A (en) * | 1974-05-28 | 1975-04-29 | Ibm | Adaptive digital servo system |
US4032984A (en) * | 1975-04-28 | 1977-06-28 | Burroughs Corporation | Transducer positioning system for providing both coarse and fine positioning |
GB1520350A (en) * | 1976-12-22 | 1978-08-09 | Ibm | Data storage apparatus |
US4157577A (en) * | 1977-11-14 | 1979-06-05 | International Business Machines Corporation | Rotatable storage apparatus with digitally responsive circuitry for track selection |
US4257074A (en) * | 1979-06-15 | 1981-03-17 | Magnetic Peripherals Inc. | Time optimal function generator for disk file magnetic recording head servo position control loop |
US4415939A (en) * | 1981-04-27 | 1983-11-15 | Iomega Corporation | Head positioning servo for disk drive |
US4400747A (en) * | 1981-06-26 | 1983-08-23 | International Business Machines Corporation | Servo system for data storage apparatus |
US4451859A (en) * | 1982-04-02 | 1984-05-29 | Ampex Corporation | Magnetic video head position control |
US4480217A (en) * | 1982-12-14 | 1984-10-30 | Storage Technology Corporation | Automatic velocity calibrator for a velocity servo loop in a magnetic disk drive |
-
1982
- 1982-12-20 US US06/451,583 patent/US4551776A/en not_active Expired - Fee Related
-
1983
- 1983-10-17 DE DE8383110301T patent/DE3369223D1/de not_active Expired
- 1983-10-17 EP EP83110301A patent/EP0111665B1/de not_active Expired
- 1983-11-14 JP JP58212606A patent/JPS59117758A/ja active Granted
Also Published As
Publication number | Publication date |
---|---|
EP0111665B1 (de) | 1987-01-14 |
JPS59117758A (ja) | 1984-07-07 |
JPH0150031B2 (de) | 1989-10-26 |
EP0111665A1 (de) | 1984-06-27 |
US4551776A (en) | 1985-11-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |