Disk drive device and address detection method with...

Details Disk drive device and address detection method with... Disk drive device and address detection method with...

2007-12-11

2007-12-11

Psitos, A M (Department: 2627)

Dynamic information storage or retrieval

Binary pulse train information signal

Including sampling or a/d converting

C369S047270, C369S124050

Reexamination Certificate

active

10492286

ABSTRACT:
A disk drive device capable of satisfactorily detecting address information recorded by land prepits even after data is recorded is provided. When address information recorded by land prepits is detected from a disk on which lands and grooves as recording tracks are formed and address information is recorded as land prepits on the lands, a window signal is generated by binarizing a push-pull signal (window generation circuit31), the push-pull signal is integrated in a period based on the window signal (integration circuit32), and the address information by the land prepits is extracted from the integrated signal (33, 34, 35, and26).

REFERENCES:
patent: 4838662 (1989-06-01), Hilsum et al.
patent: 6519214 (2003-02-01), Hikima
patent: 6801488 (2004-10-01), Kato et al.
patent: 2002/0036967 (2002-03-01), Osada
patent: 1 223 582 (2002-07-01), None
patent: 2000-113463 (2000-04-01), None
patent: 2001-266356 (2001-09-01), None
patent: 2001-312823 (2001-11-01), None
Patent Abstracts of Japan, JP 2000-113463, Apr. 21, 2000 (corr. US 6,519,214 B1).

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