Patent US3297855A successfully refreshed from Google Patents.
EP0209853A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Track jump servo system disc players
Assignee: Toshiba Corp
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Filing: 1986-07-17
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Granted: —
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Expires: 2006-07-17
Abstract
Abstract A record disc producing apparatus, which can be used for searching a desired track location rapidly, includes a pick-up device (11) for reading data from the disc and movable in a radial direction with respect to the disc and a driver (16) for driving the pick-up device (11) radially with respect to the disc. The moving velocity of the pick-up device (11) is detected and used to produce a velocity signal corresponding to the moving velocity. A kick signal is generated to energize the driver (16). The kick signal is controlled so that the velocity signal approaches a predetermined value.
Inventors
- 👤 Daiki C/O Patent Division Nabeshima
- 👤 Hiroshi C/O Patent Division Nakane
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 08:10
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B21/00; G11B21/02; G11B21/08; G11B21/081; G11B21/083; G11B21/085
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
73 words
A record disc reproducing apparatus, comprising: a pick-up device (11) for reading data from a disc; means (16) for moving said pick-up device (11) radially across said disc; and means (19, 21) for producing a velocity signal corresponding to a moving velocity of said pick-up device (11); characterized in that said apparatus comprises means (12, 18, 20) for controlling said moving means (16) to cause said velocity signal to assume a predetermined value.
Claim 2
Dependent Claim
73 words
A record disc reproducing apparatus, comprising: a pick-up device (11) for reading data from a disc; means (16) for moving said pick-up device (11) radially across said disc; and means (19, 21) for producing a velocity signal corresponding to a moving velocity of said pick-up device (11); characterized in that said apparatus comprises means (12, 18, 20) for controlling said moving means (16) to cause said velocity signal to assume a predetermined value.
Claim 3
Dependent Claim
47 words
Apparatus according to claim 1, further comprising means (17, 12) for determining a number of tracks crossed as said moving means (16) moves said pick-up device (11), said controlling means (12, 18, 20) energizing said moving means (16) when a desired number of tracks have been crossed.
Claim 4
Dependent Claim
57 words
Apparatus according to claim 2 wherein said controlling means (18, 26, 27, 28, 12) causes said moving means (16) to drive said pick-up device (11) at a high speed until said pick-up device (11) comes within a predetermined number of tracks from a desired track and then to drive said pick-up device (11) at a lower speed.
Claim 5
Dependent Claim
56 words
Apparatus according to claim 2 wherein said controlling means (12, 18, 20) causes said moving means (16) to apply a force to said pick-up device (11) opposite to the movement of said pick-up device (11) when said controlling means (12) determines said pick-up device (11) is within a predetermined number of tracks from a desired track.
Claim 6
Dependent Claim
134 words
A record disc reproducing apparatus for use in reproducing data stored thereon, comprising: a pick-up device (11) for reading data from said disc and movable in a radial direction with respect to said disc; means (16) for driving said pick-up device (11) radially with respect to said disc; and means (19, 21) for detecting a moving velocity of said pick-up device (11) and producing a velocity signal corresponding to the moving velocity, characterized in that said apparatus comprises a source (20, 27, 28) for supplying a reference voltage signal; and means (18) for generating a kick signal and supplying said pick-up device driving means (16) with said kick signal, said kick signal generating means (18) controlling said kick signal so that said velocity signal assumes a predetermined fixed relation with said reference voltage signal.
Claim 7
Dependent Claim
134 words
A record disc reproducing apparatus for use in reproducing data stored thereon, comprising: a pick-up device (11) for reading data from said disc and movable in a radial direction with respect to said disc; means (16) for driving said pick-up device (11) radially with respect to said disc; and means (19, 21) for detecting a moving velocity of said pick-up device (11) and producing a velocity signal corresponding to the moving velocity, characterized in that said apparatus comprises a source (20, 27, 28) for supplying a reference voltage signal; and means (18) for generating a kick signal and supplying said pick-up device driving means (16) with said kick signal, said kick signal generating means (18) controlling said kick signal so that said velocity signal assumes a predetermined fixed relation with said reference voltage signal.
Claim 8
Dependent Claim
27 words
A record disc reproducing apparatus according to claim 5, wherein said velocity detecting means (19) includes means for sensing a mechanical movement of said pick-up device (11).
Claim 9
Dependent Claim
32 words
A record disc reproducing apparatus according to claim 6, wherein said sensing means includes means for generating a signal corresponding to the velocity of the mechanical movement of said pick-up device (11).
Claim 10
Dependent Claim
36 words
A record disc reproducing apparatus according to claim 7, wherein said generating means includes frequency generator means for generating a frequency signal corresponding to the velocity of the mechanical movement of said pick-up device (11). ,
Claim 11
Dependent Claim
28 words
A record disc reproducing apparatus according to claim 5, wherein said velocity detecting means (21) includes means for sensing a picked-up signal read by said pick-up device (11).
Claim 12
Dependent Claim
24 words
A record disc reproducing apparatus according to claim 9, wherein said sensing means includes means for monitoring a ripple component of said picked-up signal.
Claim 13
Dependent Claim
26 words
A record disc reproducing apparatus according to claim 9, wherein said sensing means is responsive to a tracking error signal read by said pick-up device (11).
Claim 14
Dependent Claim
30 words
A record disc reproducing apparatus according to claim 9, wherein said sensing means is responsive to a ripple component and a tracking error signal read by said pick-up device (11).
Claim 15
Dependent Claim
123 words
A record disc reproducing apparatus according to any of claims 5 to 12, further comprising: switch means (13) for selectively connecting one of a picked-up signal read by said pick-up device (11) and said kick signal to said pick-up device driving means (16); means (12) for determining a distance that said pick-up device (11) should jump when a search mode operation for accessing a desired track location is requested; means (12) for detecting when said pick-up device (11) reaches the desired track location; and means (12) for commanding said switch (13) to select a connection to said kick signal when said search mode operation is requested and to select a connection to said pick-up signal in response to said track location detecting means.
Claim 16
Dependent Claim
77 words
A record disc reproducing apparatus according to claim 13, wherein said reference voltage signal source (27, 28) provides a first reference voltage signal and a second reference voltage signal higher than said first reference voltage signal, and said apparatus further comprises means (12) for controlling said reference voltage signal source (27, 28), so that it provides said second reference voltage signal first and then provides said first reference voltage signal in response to said distance determining means.
References Cited (Backward Citations)
No citation records indexed.
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