MFM Address mark encoding

Details MFM Address mark encoding MFM Address mark encoding

1978-05-24

1982-03-09

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

In specific code or form

360 43, G11B 509

Patent

active

043192874

ABSTRACT:
An address mark code for use with Modified Frequency Modulation encoding wherein (1) the first bit of the 8 bit address mark byte is always zero, (2) the address mark byte eliminates a clock pulse between the second and third zero of a string of at least four zeros, (3) the address mark byte contains the binary pattern 101, and (4) the spacing between data pulses and/or clock pulses of the address mark byte is between 1T and 2T where T is the width of a data cell of the address mark.

REFERENCES:
patent: 3387293 (1968-06-01), Stockebrand
patent: 3633190 (1972-01-01), Morsing et al.

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