1,7,2,3 Encoding/decoding employing 3/2 frequency division

Details 1,7,2,3 Encoding/decoding employing 3/2 frequency division 1,7,2,3 Encoding/decoding employing 3/2 frequency division

1987-11-05

1989-04-18

Canney, Vincent P.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data clocking

360 40, G11B 509

Patent

active

048232092

ABSTRACT:
An encoding/decoding system for 1,7,2,3 codes employs an oscillator having a frequency f and dividers providing signals at frequencies equal to 1/3 f and 2/3 f. A code converter is responsive to the three signals to encode or decode data. A 3/2 frequency divider employs two D-type flip-flops, an OR gate and an AND gate arranged to respond to an input signal at a frequency f to derive an output signal at a frequency 2/3 f.

REFERENCES:
patent: 4337458 (1982-06-01), Cohn et al.
patent: 4356456 (1982-10-01), Uzunoglu
patent: 4503420 (1985-03-01), Rub et al.
patent: 4672362 (1987-06-01), Furukawa et al.

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