Dynamic magnetic information storage or retrieval – Checking record characteristics or modifying recording...
Reexamination Certificate
2006-02-07
2006-02-07
Faber, Alan T. (Department: 2651)
Dynamic magnetic information storage or retrieval
Checking record characteristics or modifying recording...
C360S046000, C360S053000, C360S045000, C360S065000, C360S031000
Reexamination Certificate
active
06995932
ABSTRACT:
A detection circuit or a perpendicular recording system includes a channel circuit to amplify the read data signal. A transient detector generates a transient detect signal. A first path and a second path are coupled to an output of the channel circuit. The first path includes a first data detector that generates a first detected data signal in response to detecting data in the read data signal. A second path includes a series connected combination of a data filter and a second data detector. The filter generates a filtered data signal in which low frequency components of the read data signal are attenuated. The second data detector generates a second detected data signal in response to detecting data in the filtered data signal. Either the first detected data signal or the second detected data signal is coupled to a data processor based on whether a transient is detected.
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Faber Alan T.
Marvell International Ltd.
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