Dynamic loop gain alteration for data retrieval

Details Dynamic loop gain alteration for data retrieval Dynamic loop gain alteration for data retrieval

1975-04-28

1977-01-11

Lucas, Jay P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data verification

360 51, G11B 509

Patent

active

040030865

ABSTRACT:
A method and apparatus for recovering data stored on a magnetic medium which includes a variable frequency oscillator and a variable frequency oscillator feedback control loop therefor as a part of the data read circuitry, and which includes means for attempting to recover marginally recorded data by increasing the variable frequency oscillator feedback control loop gain during predetermined data read retries.

REFERENCES:
patent: 3078448 (1963-02-01), O'Brien
patent: 3430215 (1969-02-01), Krossa
patent: 3660821 (1972-05-01), Weber et al.
patent: 3753143 (1973-08-01), Aguirre
patent: 3810234 (1974-05-01), Monett
patent: 3879674 (1975-04-01), Dragon
patent: 3898690 (1975-08-01), Desai

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