Magnetic recording/reproducing apparatus for decreasing an error

Details Magnetic recording/reproducing apparatus for decreasing an error Magnetic recording/reproducing apparatus for decreasing an error

1992-09-30

1994-06-28

Hajec, Donald

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Head amplifier circuit

360 68, G11B 509, G11B 502

Patent

active

053252420

ABSTRACT:
A magnetic recording/reproducing apparatus includes a write head for recording a signal on a magnetic recording medium, a recording amplifier for supplying a recording current corresponding to the signal to the write head, a read head for reproducing the signal recorded on the magnetic recording medium, a reproducing amplifier for generating a reproduced current corresponding to the signal, an equalizer for correcting a waveform of a reproduced signal reproduced by the read head, a distortion detector for detecting distortion of signal reproduced by the read head, thereby obtaining a distortion evaluation value, and a recording current adjusting section for adjusting a magnitude of the recording current in a direction to decrease the distortion (i.e., in a direction to decrease the recording current) on the basis of a detection output obtained by the distortion detector. An optimum recording current is always supplied to the write head in accordance with the degree of wear of the write head. The degree of wear of the head is detected upon request, and head replacement is prompted.

REFERENCES:
patent: 4283737 (1981-08-01), Nikami
patent: 4326224 (1982-04-01), Kogure et al.
patent: 4553179 (1985-11-01), Inami et al.
patent: 4656529 (1987-04-01), Sakamoto
patent: 4663555 (1987-05-01), Yoshihiro
patent: 4713700 (1987-12-01), Kuwahara et al.
patent: 5081547 (1992-01-01), Howell
patent: 5119194 (1992-06-01), Yamaguchi et al.

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