Equalization preamble region in digital data storage (DDS)...

Details Equalization preamble region in digital data storage (DDS)... Equalization preamble region in digital data storage (DDS)...

2008-04-15

2008-04-15

Korzuch, William R. (Department: 2627)

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

C360S048000, C360S065000

Reexamination Certificate

active

10754617

ABSTRACT:
A magnetic tape includes plural diagonal tracks, each storing a preamble sequence close to user data such that a transducer for reading the track reads the preamble sequence immediately before reading the user data. The preamble sequence is such that when the track is read by the transducer the preamble sequence has a power sequence with a power spectrum substantially equivalent to the power spectrum of the user data. An AGC circuit responds to the transducer.

REFERENCES:
patent: 3789377 (1974-01-01), Norris
patent: 5349611 (1994-09-01), Varian
patent: 5588030 (1996-12-01), Riggle et al.
patent: 5841601 (1998-11-01), Fisher
patent: 6476992 (2002-11-01), Shimatani
patent: 831 480 (1998-03-01), None
patent: 2 177 062 (1990-07-01), None

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