Dynamic magnetic information storage or retrieval – General processing of a digital signal – Head amplifier circuit
Patent
1988-07-01
1990-03-13
Canney, Vincent P.
Dynamic magnetic information storage or retrieval
General processing of a digital signal
Head amplifier circuit
360 65, G11B 509, G11B 1514
Patent
active
049087223
ABSTRACT:
A digital magnetic recording/reproduction apparatus and method for recording and reproducing a digital information signal. The apparatus comprises a magnetic head, a recording system means for recording the digital information signal and a calibration signal with a specific digital pattern in a magnetic recording medium, through the same signal path, a reproduction system for reproducing the recorded digital information signal and the recorded calibration signal, through the same signal path, and for outputting a reproduced signal, a waveform equalizer for equalizing a waveform of the reproduced signal, a data discriminator for discriminating a data signal from the signal output from the waveform equalizer, by using a window signal, and a calibration system for controlling a characteristic of the waveform equalizer and/or the recording current supplied to the magnetic head so as to maximize a window margin of the data discriminating circuit.
REFERENCES:
patent: 4296445 (1981-10-01), Schowe, Jr.
patent: 4422109 (1983-12-01), Sampei et al.
patent: 4580176 (1986-04-01), Graves et al.
Canney Vincent P.
Kabushiki Kaisha Toshiba
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