Patent US5216650A successfully refreshed from Google Patents.
US5216650A
Expired / Lapsed
US
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Track jumping control apparatus
Assignee: Panasonic System Solutions Japan Co Ltd
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Filing: 1991-06-21
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Granted: 1993-06-01
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Expires: 2011-06-21
Abstract
Abstract Clock pulses are generated at a frequency having a fixed relation with a rotation of an information recording disk formed with a track. The clock pulses are counted. A first kick pulse is generated when the counting of the clock pulses starts. A tracking error signal is generated. A detection is made as to whether the tracking error signal crosses a zero level after the first kick pulse is generated. A brake pulse is generated when the tracking error signal crosses the zero level. A second kick pulse is generated when a number of the counted clock pulses reaches a predetermined number.
Inventors
- 👤 Yoshihiro Noguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:30
CPC Classifications
G; G11; G11B; G11B7/00; G11B7/08; G11B7/085; G11B7/08505; G11B7/08541
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
151 words
A track jumping control apparatus for use with an information recording disk and an information reading device, the disk having a track, the reading device having an actuator responsive to a kick pulse and a brake pulse, the apparatus comprising: means for generating clock pulses at a frequency having a fixed relation with a rotation of the disk; means for counting the clock pulses; means for generating a first kick pulse when the counting means starts to count the clock pulses; means for generating a tracking error signal; means for detecting that the tracking error signal crosses a zero level after the first kick pulse is generated; means for generating a brake pulse when the detecting means detects that the tracking error signal crosses the zero level; and means for generating a second kick pulse when a number of the clock pulses counted by the counting means reaches a predetermined number.
Claim 2
Dependent Claim
151 words
A track jumping control apparatus for use with an information recording disk and an information reading device, the disk having a track, the reading device having an actuator responsive to a kick pulse and a brake pulse, the apparatus comprising: means for generating clock pulses at a frequency having a fixed relation with a rotation of the disk; means for counting the clock pulses; means for generating a first kick pulse when the counting means starts to count the clock pulses; means for generating a tracking error signal; means for detecting that the tracking error signal crosses a zero level after the first kick pulse is generated; means for generating a brake pulse when the detecting means detects that the tracking error signal crosses the zero level; and means for generating a second kick pulse when a number of the clock pulses counted by the counting means reaches a predetermined number.
Claim 3
Dependent Claim
210 words
A track jumping control apparatus for use with an information recording disk and an information reading device, the disk having a track, and the reading device having an actuator responsive to a kick pulse and a brake pulse, the apparatus comprising: means for generating clock pulses in response to a rotation of the disk; means for generating a first kick pulse; counting means for starting to count the clock pulses when the first kick pulse is generated; means for ending the first kick pulse when a number of the clock pulses counted by the counting means reaches a first predetermined number; means for generating a tracking error signal; means for detecting that the tracking error signal crosses a zero level; means for, during a period after the first kick pulse is ended, generating a brake pulse when the detecting means detects that the tracking error signal crosses the zero level; means for ending the brake pulse when a number of the clock pulses counted by the counting means reaches a second predetermined number greater than the first predetermined number; and means for generating a second kick pulse when a number of the clock pulses counted by the counting means reaches a third predetermined number greater than the second predetermined number.
Claim 4
Dependent Claim
210 words
A track jumping control apparatus for use with an information recording disk and an information reading device, the disk having a track, and the reading device having an actuator responsive to a kick pulse and a brake pulse, the apparatus comprising: means for generating clock pulses in response to a rotation of the disk; means for generating a first kick pulse; counting means for starting to count the clock pulses when the first kick pulse is generated; means for ending the first kick pulse when a number of the clock pulses counted by the counting means reaches a first predetermined number; means for generating a tracking error signal; means for detecting that the tracking error signal crosses a zero level; means for, during a period after the first kick pulse is ended, generating a brake pulse when the detecting means detects that the tracking error signal crosses the zero level; means for ending the brake pulse when a number of the clock pulses counted by the counting means reaches a second predetermined number greater than the first predetermined number; and means for generating a second kick pulse when a number of the clock pulses counted by the counting means reaches a third predetermined number greater than the second predetermined number.
Claim 5
Dependent Claim
120 words
A track jumping control apparatus for use with an information recording disk and an information reading device, the disk having a spiral track, the reading device having an actuator for driving a scanning light to jump between neighboring line parts of the track in response to a drive pulse, the apparatus comprising: means for generating clock pulses in response to a rotation of the disk; means for feeding a first drive pulse to the actuator; counting means for starting to count the clock pulses when the first drive pulse is fed to actuator; and means for feeding a second drive pulse to the actuator when a number of the clock pulses counted by the counting means reaches a predetermined number.
Claim 6
Dependent Claim
120 words
A track jumping control apparatus for use with an information recording disk and an information reading device, the disk having a spiral track, the reading device having an actuator for driving a scanning light to jump between neighboring line parts of the track in response to a drive pulse, the apparatus comprising: means for generating clock pulses in response to a rotation of the disk; means for feeding a first drive pulse to the actuator; counting means for starting to count the clock pulses when the first drive pulse is fed to actuator; and means for feeding a second drive pulse to the actuator when a number of the clock pulses counted by the counting means reaches a predetermined number.
Claim 7
Dependent Claim
103 words
A track jumping control apparatus for use with an information recording disk and an information reading device, the disk having a spiral track, and the reading device having an actuator for driving a scanning light to jump between neighboring line parts of the track in response to a pair of sequentially arranged kick pulse and brake pulse, the apparatus comprising: means for generating a predetermined number of pairs of sequentially arranged kick pulse and brake pulse; means for sensing a rotation of the disk; and means for correcting the predetermined number of the pairs in accordance with the sensed rotation of the disk.
Claim 8
Dependent Claim
103 words
A track jumping control apparatus for use with an information recording disk and an information reading device, the disk having a spiral track, and the reading device having an actuator for driving a scanning light to jump between neighboring line parts of the track in response to a pair of sequentially arranged kick pulse and brake pulse, the apparatus comprising: means for generating a predetermined number of pairs of sequentially arranged kick pulse and brake pulse; means for sensing a rotation of the disk; and means for correcting the predetermined number of the pairs in accordance with the sensed rotation of the disk.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-05-31 | 1996-11-30 | 1997-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-05-31 | 2000-11-30 | 2001-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-05-31 | 2004-11-30 | 2005-06-01 | $7700.00 | Window Closed / Lapsed |