Waveform equalizer for signal reproduced from a magnetic recordi

Details Waveform equalizer for signal reproduced from a magnetic recordi Waveform equalizer for signal reproduced from a magnetic recordi

1987-03-27

1988-11-22

Cardillo, Raymond F.

Dynamic magnetic information storage or retrieval

General recording or reproducing

Specifics of equalizing

333 28R, 333138, G11B 545, G11B 509

Patent

active

047869895

ABSTRACT:
In a waveform equalizer of the present invention, first and second Hilbert-transform signals are formed from a parallel-reproduced signal, and a desired signal is obtained from these signals by an operational amplifier. The waveform equalizer includes a reflecting section having a plurality of resistors, and a switching section for selecting one of the resistors in accordance with a control signal. Therefore, the waveform equalizer can process a plurality of reproduced signals which have different ratios of the longitudinal signal component to the perpendicular signal component without being affected by inphase noise.

REFERENCES:
patent: 3408640 (1968-10-01), Masson
patent: 4535417 (1985-08-01), Peacock
patent: 4633200 (1986-12-01), Adler
patent: 4635143 (1987-01-01), Suzuki et al.
Telecommunications radio engineering, vols. 29-30; pp. 114-120, 1975.
IEEE Transactions on Magnetics, vol. MAG-18, No. 6, Nov. 1982, pp. 1247-1249.
IEEE Transactions on Magnetics, vol. MAG-12, No. 6; Nov. 1976, pp. 746-748.

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