Digital magnetic recording

Details Digital magnetic recording Digital magnetic recording

1982-02-18

1985-02-12

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 46, G11B 509

Patent

active

044995083

ABSTRACT:
In a system for retrieving data from a recording medium employing MFM or FM encoding forms, a decoding method and circuit employs the technique of delaying the third harmonic of the data signal relative to the fundamental of the data signal by 180 degrees. This delaying is effected by the use of two resonant networks each delaying the third harmonic relative to the fundamental by 90 degrees. The delaying technique enables a differentation stage to be eliminated.

REFERENCES:
patent: 4319288 (1982-03-01), Lee

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