Waveform processing system and method for recording digital info

Details Waveform processing system and method for recording digital info Waveform processing system and method for recording digital info

1991-05-17

1993-10-19

Mis, David

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of the amplifier

360 39, G11B 502, G11B 509

Patent

active

052551334

ABSTRACT:
A reproduction waveform signal l(having a frequency f) containing perpendicular and longitudinal components is reproduced from a recording medium which is magnetized in the vertical direction, thereby recording digital information. The signal is processed through a waveform processing circuit including an operational amplifier having an input side connected to a time constant-setting circuit comprising a capacitor and a resistor, thereby obtaining a processed waveform signal having a constant amplitude and a phase shifted by 2.times.(tan.sup.-1 2.pi.fA).degree. . Bits of the digital information is detected from the processed waveform signal.

REFERENCES:
patent: 4845576 (1989-07-01), Kusunoki et al.
IEEE Trans. on Magn vol. 18, No. 6 Nov. 1982 "Phase Equalization for Perpendicular Recording"; B. J. Langland pp. 1247-1249.

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