Dynamic magnetic information storage or retrieval – General processing of a digital signal – Data clocking
Patent
1986-06-18
1989-07-04
Faber, Alan
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Data clocking
360 46, 360 39, G11B 509
Patent
active
048455741
ABSTRACT:
An apparatus for recording and reproducing a digital data signal carrying digital information at each periodically appearing reference "P1" phase includes a detector for detecting and producing a phase data signal at each sampling point. Two subsequently sampled phase data are stored in latches for use of the digital data signal by three signal comparators. The first comparator compares the first sampled phase data signal and the second sampled phase data signal. The second comparator compares the first sampled phase data signal with a predetermined value, and the third comparator compares the second sampled phase data signal with the same predetermined value. Utilizing the outputs of the three comparators, a phase condition detector detects whether or not a reference phase is contained between two subsequent sampling points. A detection pulse generator is provided which generates a data detection pulse when the phase condition detector detects the reference phase.
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Ii Hiroshi
Koyanagi Katsubumi
Yasuda Syuhei
Faber Alan
Sachar Surinder
Sharp Kabushiki Kaisha
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