Discrimination during reading of data prerecorded in different c

Details Discrimination during reading of data prerecorded in different c Discrimination during reading of data prerecorded in different c

1977-05-06

1979-04-24

Sloyan, Thomas J.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 43, G11B 509, G11B 2710

Patent

active

041515650

ABSTRACT:
A circuit for the decoding during reading of data prerecorded on a magnetic medium comprising a circuit for recognition of the recording code of the data recorded on the support by the recognition of the frequency of an input signal generated during the reading of the support and a frequency generating circuit controlled by the recognition circuit for generating a signal of predetermined frequency for the conversion of the recording code recognized into a binary code. A read-only memory comprising two zones is responsive to the recognition means for generating correcting words applied to a counter for controlling the position of a decoding window generated by a phase locked loop oscillator.

REFERENCES:
patent: 3133189 (1964-05-01), Bagley et al.
patent: 3581297 (1971-05-01), Behr et al.
patent: 3947876 (1976-03-01), Gray

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