US5140476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for tracing a track center of a magnetic disc
Assignee: LG Electronics Inc
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Filing: 1989-11-22
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Granted: 1992-08-18
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Expires: 2009-11-22
Abstract
Abstract The deviation of head and track at a most outside position conference track (PtO) and at a most inside position conference tract (Pti), the deviation value is processed in accordance with the linear interpolation, and the deviation of the head from a certain data track can be forecasted. If these position reference tracks (Pt) are used and the deviation of head from the certain track is processed according to the interpolation of curve of second order, the deviation of the head from the track is forecasted more precisely, and the deviation can be compensated for to trace the track center correctly.
Inventors
- 👤 Sang Young Kim
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 06:16
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/48; G11B5/56; G11B5/58; G11B5/596; G11B5/59627; G11B5/59605; G11B5/59611
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
77 words
An apparatus for tracking a track center of a magnetic disk comprising: a head for reading position information recorded on the magnetic disk; a preamplifier connected to said head; envelope means for determining amplitudes of signals representing the position information; sample and hold means for storing said amplitudes; comparing means for comparing the stored amplitudes; and a microprocessor for determining a track center of a magnetic disk from a result of the comparison of said stored amplitudes.
Claim 2
Independent Claim
77 words
An apparatus for tracking a track center of a magnetic disk comprising: a head for reading position information recorded on the magnetic disk; a preamplifier connected to said head; envelope means for determining amplitudes of signals representing the position information; sample and hold means for storing said amplitudes; comparing means for comparing the stored amplitudes; and a microprocessor for determining a track center of a magnetic disk from a result of the comparison of said stored amplitudes.
Claim 3
Independent Claim
57 words
A method of tracking a track center of a magnetic disk recorder comprising the steps of: (a) reading position information from a magnetic disk; (b) detecting amplitudes of signals representing the recorded position information; (c) storing the detected amplitudes; (d) comparing the stored amplitudes; and (e) determining the track center from the comparison executed in step (d).
Claim 4
Independent Claim
57 words
A method of tracking a track center of a magnetic disk recorder comprising the steps of: (a) reading position information from a magnetic disk; (b) detecting amplitudes of signals representing the recorded position information; (c) storing the detected amplitudes; (d) comparing the stored amplitudes; and (e) determining the track center from the comparison executed in step (d).
Claim 5
Dependent Claim
60 words
The method as claimed in claim 2, wherein position information is recorded on the magnetic disk in dividing sectors, the amplitude of the signal representing the position information read from the sectors is changed in accordance with a deviation of a head from a track in order to display size and direction of the deviation, thereby measuring the deviation precisely.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-08-18 | 1996-02-17 | 1996-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-18 | 2000-02-17 | 2000-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-18 | 2004-02-17 | 2004-08-18 | $7700.00 | Window Closed / Lapsed |