Automatic closed loop adjustment of analog read signals under mi

Details Automatic closed loop adjustment of analog read signals under mi Automatic closed loop adjustment of analog read signals under mi

1993-04-13

1995-01-17

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Pulse crowding correction

360 67, G11B 509, G11B 502

Patent

active

053830644

ABSTRACT:
A closed loop resolution enhancement technique for reducing density effects to permit increased digital data storage density on magnetic media and improve data reliability for at a given density, uses a predetermined test pattern written on the medium to determine the ratio of amplitudes of high and low frequency components of the test pattern and adjust a resolution value. After a test pattern read operation is used to adjust the resolution value, the same value is used during normal data recovery operations.

REFERENCES:
patent: 4300174 (1981-11-01), Harman et al.
patent: 4306257 (1981-12-01), Harman
patent: 4371900 (1983-02-01), Huber
patent: 4635141 (1987-01-01), Coulter
patent: 5081547 (1992-01-01), Howell

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