Doublet detector for data recording or transmission

Details Doublet detector for data recording or transmission Doublet detector for data recording or transmission

1984-02-24

1985-08-20

Roskoski, Bernard

Communications: electrical

Audible indication

Percussion-type sound producer

360 39, 307231, 328114, 328115, H03K 1700

Patent

active

045367400

ABSTRACT:
A data recovery circuit useful in magnetic data recording systems employs doublet pulses to at least partially encode data. Measurement of the slope of the transition between doublet pulse half-cycle peaks and of the amplitude of this transition allows rejection of high frequency low amplitude noise and high amplitude low frequency noise. The use of nearly the entire peak-to-peak voltage swing of doublet pulses makes identifying them relatively reliable.

REFERENCES:
patent: 3631263 (1971-12-01), Graham et al.
patent: 4135161 (1979-01-01), Torrieri
patent: 4255742 (1981-03-01), Gable et al.
IBM Tech. Disc. Bull., vol. 14, No. 4, Sep. 1971, pp. 1168-1169 --Detection in Readback Circuits.

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