Magnetic tape phase encoded data read circuit

Details Magnetic tape phase encoded data read circuit Magnetic tape phase encoded data read circuit

1975-03-19

1976-09-07

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

G11B 509

Patent

active

039797716

ABSTRACT:
This digital circuit generates a window during which the data bit transitions of phase encoded data may be read from magnetic tape. This circuit contemplates a system for reading nine track tape and comprises one phase lock loop and window generator for each track, and the logic and control circuitry necessary to deskew and output the data in the form of nine bit bytes. Each phase lock loop is individually free to correct itself to conform to the variations of its own track, and the control circuit can compensate for a total skew of up to four bit times.

REFERENCES:
patent: 3493868 (1970-02-01), Hackett, Jr.
patent: 3731220 (1973-05-01), Besenfelder
patent: 3789400 (1974-01-01), Towns
patent: 3887942 (1975-06-01), Horowitz

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