Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1994-10-07
1996-07-02
Kim, W. Chris
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 53, 360 62, G11B 509, G11B 1512
Patent
active
055328857
ABSTRACT:
A magnetic recording/reproducing apparatus for reproducing data recorded on a recording medium based on the signal read by a head contains a filter circuit which restricts the frequency range of the read signal and allows the low frequency read signal to pass through it, a full wave rectification circuit for full wave rectification of the read signal output from this filter circuit and an integrating circuit for generating a threshold signal of the read signal output from the filter circuit based on the integrated value obtained by integrating the output signal from the full wave rectification circuit when reproducing data and for holding the integrated value at the time of the immediately before data reproduction during the operation other than the data reproducing operation. Further, the apparatus contains a binarization circuit for generating read data pulses based on the threshold signal output from the integrating circuit and a differentiated signal obtained by differentiating the read signal output from the filter circuit.
REFERENCES:
patent: 4495528 (1985-01-01), Sasamura et al.
Kabushiki Kaisha Toshiba
Kim W. Chris
Yin Ronald L.
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