Dynamic magnetic information storage or retrieval – General recording or reproducing
Reexamination Certificate
2006-08-08
2006-08-08
Tran, Thang V. (Department: 2627)
Dynamic magnetic information storage or retrieval
General recording or reproducing
C360S065000
Reexamination Certificate
active
07088536
ABSTRACT:
A magnetically recorded data reproduction apparatus that reproduces magnetically recorded data using a magnetoresistive head and method thereof. The recorded data are reproduced by a magnetoresistive head and supplied to a reproduction amplifier. A signal from an AGC amplifier is supplied to an A/D converter and a digital PLL circuit. A digitized signal is then supplied to, for example, a Viterbi decoder 13 and the decoded signal is obtained at an output terminal 14. Thus, the effect of noise due to the so-called thermal asperity (TA noise) is removed, thereby preventing increases in the error rate of the reproduction signals due to the effect of TA noise and the occurrence of problems in equipment.
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Kondo Nobuhiro
Yanagi Yuji
Frommer William S.
Frommer & Lawrence & Haug LLP
Giesy Adam R.
Presson Thomas F.
Tran Thang V.
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