Self-clocking magnetic record sensing system

Details Self-clocking magnetic record sensing system Self-clocking magnetic record sensing system

1975-02-21

1976-06-08

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 45, G11B 509

Patent

active

039627268

ABSTRACT:
A system is disclosed for sensing a single moving magnetic track, to provide two distinct binary signals (clock and binary data) representative of digital information. Magnetically recorded signals in the Manchester or F/2F code format are selectively processed into electrical representations, using time and amplitude criteria to verify and distinguish between clock (sync) pulses and binary data pulses. An amplitude discriminator is controlled on the basis of the amplitude of immediately prior signals as well as the character of prior binary data pulse signals. A time discriminator is controlled (to segregate clock and data pulse signals) on the basis of the interval of immediately prior signals as well as the character (1 or 0) of prior binary data pulse signals. Consequently, the system is tolerant with regard to signal quality and speed consistency of the relative motion.

REFERENCES:
patent: 3689903 (1972-09-01), Agravalz et al.
patent: 3711843 (1973-01-01), Galvagni
patent: 3810234 (1974-05-01), Monerr
patent: 3827078 (1974-07-01), Bauer
patent: 3838448 (1974-09-01), Garde et al.

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