Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system
Patent
1998-03-18
2000-07-11
Edun, Muhammad
Dynamic information storage or retrieval
With servo positioning of transducer assembly over track...
Optical servo system
369 4426, 369 4428, 3692754, G11B 700
Patent
active
060883073
ABSTRACT:
In a wobble signal detecting circuit provided by the present invention, a wobble signal is converted into binary data before being supplied to a PLL circuit by way of a polarity switching circuit and a clock switching circuit. The PLL circuit outputs a recording/playback timing generation clock signal. The frequency of the recording/playback timing generation clock signal is divided by a frequency dividing circuit before being fed back to the PLL circuit. A difference in phase between the wobble signal and the feedback signal is detected by a phase inversion detecting circuit and, if the difference in phase exceeds a phase difference determined in advance, the phase inversion detecting circuit generates a polarity switching signal for switching the polarity of the wobble signal. The polarity switching signal is used to invert the polarity of the polarity switching circuit.
REFERENCES:
patent: 5508991 (1996-04-01), Onigata et al.
patent: 5508995 (1996-04-01), Moriya et al.
patent: 5566141 (1996-10-01), Yamaguchi et al.
patent: 5615185 (1997-03-01), Horikiri
patent: 5754506 (1998-05-01), Nagasawa et al.
patent: 5818805 (1998-10-01), Kobayashi et al.
patent: 5936933 (1999-08-01), Miyamoto et al.
Fushimi Tetsuya
Ikeda Tetsuya
Ishibashi Toshiaki
Kaku Toshimitsu
Shigematsu Kazuo
Edun Muhammad
Hitachi , Ltd.
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